KB-2256 Kafka fails to start on Windows after applying hotfix

pauline.delacruz — Mon, 13 Nov 2023 14:20:10 GMT

Current Revision posted to Appian Knowledge Base by pauline.delacruz on 11/13/2023 2:20:10 PM

Symptoms

After applying a hotfix released between June 5, 2023 and Oct 20, 2023 on Appian 21.3 and later, Kafka fails to start on Windows and prevents site startup.

Zookeeper is able to start
The following message is repeated in the console output during Kafka startup

waiting for process Kafka
waiting for process Kafka
waiting for process Kafka
waiting for process Kafka

Eventually, the following errors are displayed in the console output

Service Kafka failed to start
Error running script: Unable to start transaction log.
Unable to start distributed transaction log. Check the Kafka and Zookeeper logs for more information.
com.appian.komodo.StartKomodo$TransactionLogNotStartedException: Unable to start transaction log.

Cause

Self-managed hotfix packages meant for Windows contained the Unix Kafka version instead of the Windows version. This incompatibility caused Kafka to fail startup for sites using these hotfixes.

Action

For hotfixes released on Nov 3, 2023 and later, hotfix packages for Windows and Linux are separated. Starting from the following hotfixes from 21.4 to 23.3, pick the relevant hotfix package for your Operating System (Linux/Windows) accordingly and follow the updated instructions to apply the hotfix.

21.4.2327.0
22.1.2047.0
22.2.1727.0
22.3.1502.0
22.4.1307.0
23.1.967.0
23.2.712.0
23.3.441.0

To apply one of the following hotfixes released between June 5, 2023 and Oct 20, 2023, follow the manual steps below for respective OS to function successfully.

21.3.2160.0 to 21.3.2310.0
21.4.1915.0 to 21.4.2300.0
22.1.1630.0 to 22.1.2026.0
22.2.1315.0 to 22.2.1706.0
22.3.1075.0 to 22.3.1466.0
22.4.850.0 to 22.4.1266.0
23.1.525.0 to 23.1.926.0
23.2.235.0 to 23.2.671.0
23.3.205.0 to 23.3.396.0

Windows Hotfixes (June 5, 2023 - Oct 20, 2023)

If the hotfix has been attempted but failed, please ensure that you have a full system backup taken prior to the hotfix, and then proceed to restore the backup.
Download the latest hotfix package for your Appian installation.
The kafka-server_<version>-appian-<number>.tgz at the root of the hotfix package contains the correct version.
1. Follow the steps from the hotfix installation up until (and including) the step to unzip updates.zip.
2. Under <APPIAN_HOME>/services, delete all kafka-<version> directories.
3. Unzip kafka-server_<version>-appian-<number>.tgz and move the generated kafka-<version> directory (the path would look like <APPIAN_HOME>/Hotfix Version <version>/kafka-server-<version>/kafka-server-<version>/kafka-<version>) into <APPIAN_HOME>/services.
4. Delete kafka-server_<versdion>-appian-<number>.tgz
5. Proceed with the remaining steps to install the hotfix as normal.

Linux Hotfixes (June 5, 2023 - Oct 20, 2023)

No action is required as the kafka-server_<version>-appian-<number>.tgz at the root of the hotfix package is not utilized during hotfix application on Linux. If your Appian runs in a Linux environment, please feel free to ignore the kafka-server_<version>-appian-<number>.tgz or delete it at the end of hotfix application.

Affected Versions

This article applies to self-managed Appian 21.3 and later hosted on Windows.

Last Reviewed: November 2023

Tags: infrastructure, hotfix

KB-2256 Kafka fails to start on Windows after applying hotfix

pauline.delacruz — Thu, 21 Sep 2023 13:21:11 GMT

Revision 26 posted to Appian Knowledge Base by pauline.delacruz on 9/21/2023 1:21:11 PM

Symptoms

After applying a hotfix released after June 5th on Appian 21.3 and later, Kafka fails to start on Windows and prevents site startup.

Zookeeper is able to start.
The following message is repeated in the console output:

waiting for process Kafka
waiting for process Kafka
waiting for process Kafka
waiting for process Kafka

Eventually, the following errors are displayed in the console output:

Service Kafka failed to start
Error running script: Unable to start transaction log.
Unable to start distributed transaction log. Check the Kafka and Zookeeper logs for more information.
com.appian.komodo.StartKomodo$TransactionLogNotStartedException: Unable to start transaction log.

Cause

Self-managed hotfix packages meant for Windows contained the Unix Kafka version instead of the Windows version. This incompatibility caused Kafka to fail startup for sites using these hotfixes.

The fix has been merged into all the available hotfixes for Appian 21.3 and higher.
Note: This is a short-term fix and requires the following manual intervention to function successfully.

Action

Windows

Until further notice, all self-managed Windows customers planning to apply one of the following hotfix versions are required to perform manual intervention:

21.3.2160.0 to latest
21.4.1915.0 to latest
22.1.1630.0 to latest
22.2.1315.0 to latest
22.3.1075.0 to latest
22.4.850.0 to latest
23.1.525.0 to latest
23.2.235.0 to latest

If the hotfix has been attempted but failed, please ensure that you have a full system backup taken prior to the hotfix, and then proceed to restore the backup.
Download the latest hotfix package for your Appian installation.
The kafka-server_<version>-appian-<number>.tgz at the root of the hotfix package contains the correct version.
1. Follow the steps from the hotfix installation up until (and including) the step to unzip updates.zip.
2. Under <APPIAN_HOME>/services, delete all kafka-<version> directories.
3. Unzip kafka-server_<version>-appian-<number>.tgz and move the generated kafka-<version> directory (the path would look like <APPIAN_HOME>/Hotfix Version <version>/kafka-server-<version>/kafka-server-<version>/kafka-<version>) into <APPIAN_HOME>/services.
4. Delete kafka-server_<versdion>-appian-<number>.tgz
5. Proceed with the remaining steps to install the hotfix as normal.

Linux

Affected Versions

This article applies to self-managed Appian 21.3 and later hosted on Windows.

Last Reviewed: September 2023

Tags: infrastructure, hotfix

KB-2256 Kafka fails to start on Windows after applying hotfix

pauline.delacruz — Tue, 19 Sep 2023 18:17:32 GMT

Revision 25 posted to Appian Knowledge Base by pauline.delacruz on 9/19/2023 6:17:32 PM

Symptoms

After applying a hotfix released after June 5th on Appian 21.3 and later, Kafka fails to start on Windows and prevents site startup.

Zookeeper is able to start.
The following message is repeated in the console output:

waiting for process Kafka
waiting for process Kafka
waiting for process Kafka
waiting for process Kafka

Eventually, the following errors are displayed in the console output:

Service Kafka failed to start
Error running script: Unable to start transaction log.
Unable to start distributed transaction log. Check the Kafka and Zookeeper logs for more information.
com.appian.komodo.StartKomodo$TransactionLogNotStartedException: Unable to start transaction log.

Cause

Self-managed hotfix packages meant for Windows contained the Unix Kafka version instead of the Windows version. This incompatibility caused Kafka to fail startup for sites using these hotfixes.

The fix has been merged into all the available hotfixes for Appian 21.3 and higher.
Note: This is a short-term fix and requires the following manual intervention to function successfully.

Action

Until further notice, all self-managed Windows customers planning to apply one of the following hotfix versions are required to perform manual intervention:

21.3.2160.0 to latest
21.4.1915.0 to latest
22.1.1630.0 to latest
22.2.1315.0 to latest
22.3.1075.0 to latest
22.4.850.0 to latest
23.1.525.0 to latest
23.2.235.0 to latest

If the hotfix has been attempted but failed, please ensure that you have a full system backup taken prior to the hotfix, and then proceed to restore the backup.
Download the latest hotfix package for your Appian installation.
The kafka-server_<version>-appian-<number>.tgz at the root of the hotfix package contains the correct version.
1. Follow the steps from the hotfix installation up until (and including) the step to unzip updates.zip.
2. Under <APPIAN_HOME>/services, delete all kafka-<version> directories.
3. Unzip kafka-server_<version>-appian-<number>.tgz and move the generated kafka-<version> directory (the path would look like <APPIAN_HOME>/Hotfix Version <version>/kafka-server-<version>/kafka-server-<version>/kafka-<version>) into <APPIAN_HOME>/services.
4. Delete kafka-server_<versdion>-appian-<number>.tgz
5. Proceed with the remaining steps to install the hotfix as normal.

Linux

Affected Versions

This article applies to self-managed Appian 21.3 and later hosted on Windows.

Last Reviewed: September 2023

Tags: infrastructure, hotfix

KB-2256 Kafka fails to start on Windows after applying hotfix

Elly Meng — Tue, 22 Aug 2023 18:20:20 GMT

Revision 24 posted to Appian Knowledge Base by Elly Meng on 8/22/2023 6:20:20 PM

Symptoms

After applying a hotfix released after June 5th on Appian 21.3 and later, Kafka fails to start on Windows and prevents site startup.

Zookeeper is able to start.
The following message is repeated in the console output:

waiting for process Kafka
waiting for process Kafka
waiting for process Kafka
waiting for process Kafka

Eventually, the following errors are displayed in the console output:

Service Kafka failed to start
Error running script: Unable to start transaction log.
Unable to start distributed transaction log. Check the Kafka and Zookeeper logs for more information.
com.appian.komodo.StartKomodo$TransactionLogNotStartedException: Unable to start transaction log.

Cause

Self-managed hotfix packages meant for Windows contained the Unix Kafka version instead of the Windows version. This incompatibility caused Kafka to fail startup for sites using these hotfixes.

The fix has been merged into all the available hotfixes for Appian 21.3 and higher.
Note: This is a short-term fix and requires the following manual intervention to function successfully.

Action

Until further notice, all self-managed Windows customers planning to apply one of the following hotfix versions are required to perform manual intervention:

21.3.2160.0 to latest
21.4.1915.0 to latest
22.1.1630.0 to latest
22.2.1315.0 to latest
22.3.1075.0 to latest
22.4.850.0 to latest
23.1.525.0 to latest
23.2.235.0 to latest

If the hotfix has been attempted but failed, please ensure that you have a full system backup taken prior to the hotfix, and then proceed to restore the backup.
Download the latest hotfix package for your Appian installation.
The kafka-server_<version>-appian-<number>.tgz at the root of the hotfix package contains the correct version.
1. Follow the steps from the hotfix installation up until (and including) the step to unzip updates.zip.
2. Under <APPIAN_HOME>/services, delete all kafka-<version> directories.
3. Unzip kafka-server_<version>-appian-<number>.tgz and move the generated kafka-<version> directory (the path would look like <APPIAN_HOME>/Hotfix Version <version>/kafka-server-<version>/kafka-server-<version>/kafka-<version>) into <APPIAN_HOME>/services.
4. Delete kafka-server_<versdion>-appian-<number>.tgz
5. Proceed with the remaining steps to install the hotfix as normal.

Affected Versions

This article applies to self-managed Appian 21.3 and later hosted on Windows.

Last Reviewed: August 2023

Tags: infrastructure, hotfix

KB-2256 Kafka fails to start on Windows after applying hotfix

pauline.delacruz — Fri, 11 Aug 2023 14:23:35 GMT

Revision 23 posted to Appian Knowledge Base by pauline.delacruz on 8/11/2023 2:23:35 PM

Symptoms

After applying a hotfix released after June 5th on Appian 21.3 and later, Kafka fails to start on Windows and prevents site startup.

Zookeeper is able to start.
The following message is repeated in the console output:

waiting for process Kafka
waiting for process Kafka
waiting for process Kafka
waiting for process Kafka

Eventually, the following errors are displayed in the console output:

Service Kafka failed to start
Error running script: Unable to start transaction log.
Unable to start distributed transaction log. Check the Kafka and Zookeeper logs for more information.
com.appian.komodo.StartKomodo$TransactionLogNotStartedException: Unable to start transaction log.

Cause

Self-managed hotfix packages meant for Windows contained the Unix Kafka version instead of the Windows version. This incompatibility caused Kafka to fail startup for sites using these hotfixes.

The fix has been merged into all the available hotfixes for Appian 21.3 and higher.
Note: This is a short-term fix and requires the following manual intervention to function successfully.

Action

Until further notice, all self-managed Windows customers planning to apply one of the following hotfix versions are required to perform manual intervention:

21.3.2160.0 to latest
21.4.1915.0 to latest
22.1.1630.0 to latest
22.2.1315.0 to latest
22.3.1075.0 to latest
22.4.850.0 to latest
23.1.525.0 to latest
23.2.235.0 to latest

If the hotfix has been attempted but failed, please ensure that you have a full system backup taken prior to the hotfix, and then proceed to restore the backup.
Download the latest hotfix package for your Appian installation.
The kafka-server_<version>-appian-<number>.tgz at the root of the hotfix package contains the correct version.
1. Follow the steps from the hotfix installation up until (and including) the step to unzip updates.zip.
2. Under <APPIAN_HOME>/services, delete the kafka-<version> directory.
3. Unzip kafka-server_<version>-appian-<number>.tgz and move the generated kafka-<version> directory (the path would look like <APPIAN_HOME>/Hotfix Version <version>/kafka-server-<version>/kafka-server-<version>/kafka-<version>) into <APPIAN_HOME>/services.
4. Delete kafka-server_<version>-appian-<number>.tgz
5. Proceed with the remaining steps to install the hotfix as normal.

Affected Versions

This article applies to self-managed Appian 21.3 and later hosted on Windows.

Last Reviewed: August 2023

Tags: infrastructure, hotfix

KB-2256 Kafka fails to start on Windows after applying hotfix

pauline.delacruz — Mon, 07 Aug 2023 16:35:16 GMT

Revision 22 posted to Appian Knowledge Base by pauline.delacruz on 8/7/2023 4:35:16 PM

Symptoms

After applying a hotfix released after June 5th on Appian 21.3 and later, Kafka fails to start on Windows and prevents site startup.

Zookeeper is able to start.
The following message is repeated in the console output:

waiting for process Kafka
waiting for process Kafka
waiting for process Kafka
waiting for process Kafka

Eventually, the following errors are displayed in the console output:

Service Kafka failed to start
Error running script: Unable to start transaction log.
Unable to start distributed transaction log. Check the Kafka and Zookeeper logs for more information.
com.appian.komodo.StartKomodo$TransactionLogNotStartedException: Unable to start transaction log.

Cause

Self-managed hotfix packages meant for Windows contained the Unix Kafka version instead of the Windows version. This incompatibility caused Kafka to fail startup for sites using these hotfixes.

The fix has been merged into all the available hotfixes for Appian 21.3 and higher.
Note: This is a short-term fix and requires the following manual intervention to function successfully.

Action

Until further notice, all self-managed Windows customers using one of the following affected hotfix versions are required to perform manual intervention:

21.3.2160.0 to latest
21.4.1915.0 to latest
22.1.1630.0 to latest
22.2.1315.0 to latest
22.3.1075.0 to latest
22.4.850.0 to latest
23.1.525.0 to latest
23.2.235.0 to latest

If the hotfix has been attempted but failed, please ensure that you have a full system backup taken prior to the hotfix, and then proceed to restore the backup.
Download the latest hotfix package for your Appian installation.
The kafka-server_<version>-appian-<number>.tgz at the root of the hotfix package contains the correct version.
1. Follow the steps from the hotfix installation up until (and including) the step to unzip updates.zip.
2. Under <APPIAN_HOME>/services, delete the kafka-<version> directory.
3. Unzip kafka-server_<version>-appian-<number>.tgz and move the generated kafka-<version> directory (the path would look like <APPIAN_HOME>/Hotfix Version <version>/kafka-server-<version>/kafka-server-<version>/kafka-<version>) into <APPIAN_HOME>/services.
4. Delete kafka-server_<version>-appian-<number>.tgz
5. Proceed with the remaining steps to install the hotfix as normal.

Affected Versions

This article applies to self-managed Appian 21.3 and later hosted on Windows.

Last Reviewed: August 2023

Tags: infrastructure, hotfix

[DRAFT SP-8896] KB-XXXX Kafka fails to start on Windows after applying hotfix

Yiyi Tao — Wed, 02 Aug 2023 16:03:19 GMT

Revision 21 posted to Appian Knowledge Base by Yiyi Tao on 8/2/2023 4:03:19 PM

Symptoms

After applying a hotfix released after June 5th on Appian 21.3 and later, Kafka fails to start on Windows and prevents site startup.

Zookeeper is able to start.
The following message is repeated in the console output:

waiting for process Kafka
waiting for process Kafka
waiting for process Kafka
waiting for process Kafka

Eventually, the following errors are displayed in the console output:

Service Kafka failed to start
Error running script: Unable to start transaction log.
Unable to start distributed transaction log. Check the Kafka and Zookeeper logs for more information.
com.appian.komodo.StartKomodo$TransactionLogNotStartedException: Unable to start transaction log.

Cause

Self-managed hotfix packages meant for Windows contained the Unix Kafka version instead of the Windows version. This incompatibility caused Kafka to fail startup for sites using these hotfixes.

The fix has been merged into all the available hotfixes for Appian 21.3 and higher.
Note: This is a short-term fix and requires the following manual intervention to function successfully.

Action

Until further notice, all self-managed Windows customers using one of the following affected hotfix versions are required to perform manual intervention:

21.3.2160.0 to latest
21.4.1915.0 to latest
22.1.1630.0 to latest
22.2.1315.0 to latest
22.3.1075.0 to latest
22.4.850.0 to latest
23.1.525.0 to latest
23.2.235.0 to latest

If the hotfix has been attempted but failed, please ensure that you have a full system backup taken prior to the hotfix, and then proceed to restore the backup.
Download the latest hotfix package for your Appian installation.
The kafka-server_<version>-appian-<number>.tgz at the root of the hotfix package contains the correct version.
1. Follow the steps from the hotfix installation up until (and including) the step to unzip updates.zip.
2. Under <APPIAN_HOME>/services, delete the kafka-<version> directory.
3. Unzip kafka-server_<version>-appian-<number>.tgz and move the generated kafka-<version> directory (the path would look like <APPIAN_HOME>/Hotfix Version <version>/kafka-server-<version>/kafka-server-<version>/kafka-<version>) into <APPIAN_HOME>/services.
4. Delete kafka-server_<version>-appian-<number>.tgz
5. Proceed with the remaining steps to install the hotfix as normal.

Affected Versions

This article applies to self-managed Appian 21.3 and later hosted on Windows.

Last Reviewed: July 2023

Tags: infrastructure, hotfix

[DRAFT SP-8896] KB-XXXX Kafka fails to start on Windows after applying hotfix

Yiyi Tao — Wed, 02 Aug 2023 15:56:53 GMT

Revision 20 posted to Appian Knowledge Base by Yiyi Tao on 8/2/2023 3:56:53 PM

Symptoms

After applying a hotfix released after June 5th on Appian 21.3 and later, Kafka fails to start on Windows and prevents site startup.

Zookeeper is able to start.
The following message is repeated in the console output:

waiting for process Kafka
waiting for process Kafka
waiting for process Kafka
waiting for process Kafka

Eventually, the following errors are displayed in the console output:

Service Kafka failed to start
Error running script: Unable to start transaction log.
Unable to start distributed transaction log. Check the Kafka and Zookeeper logs for more information.
com.appian.komodo.StartKomodo$TransactionLogNotStartedException: Unable to start transaction log.

Cause

Self-managed hotfix packages meant for Windows contained the Unix Kafka version instead of the Windows version. This incompatibility caused Kafka to fail startup for sites using these hotfixes.

The fix has been merged into all the available hotfixes for Appian 21.3 and higher.
Note: This is a short-term fix and requires the following manual intervention to function successfully.

Action

Until further notice, all self-managed Windows customers using one of the following affected hotfix versions are required to perform manual intervention:

21.3.2160.0 to latest
21.4.1915.0 to latest
22.1.1630.0 to latest
22.2.1315.0 to latest
22.3.1075.0 to latest
22.4.850.0 to latest
23.1.525.0 to latest
23.2.235.0 to latest

If the hotfix has been attempted but failed, please ensure that you have a full system backup taken prior to the hotfix, and then proceed to restore the backup.
Download the latest hotfix package for your Appian installation.
The kafka-server_<version>-appian-<number>.tgz at the root of the hotfix package contains the correct version.
1. Follow the steps from the hotfix installation up until (and including) the step to unzip updates.zip.
2. Under <APPIAN_HOME>/services, delete the kafka-<version> directory.
3. Unzip kafka-server_<version>-appian-<number>.tgz and move the generated kafka-<version> directory (the path would look like <APPIAN_HOME>/Hotfix Version 23.2.390.0/kafka-server-<version>/kafka-server-<version>/kafka-<version>) into <APPIAN_HOME>/services.
4. Delete kafka-server_<version>-appian-<number>.tgz
5. Proceed with the remaining steps to install the hotfix as normal.

Affected Versions

This article applies to self-managed Appian 21.3 and later hosted on Windows.

Last Reviewed: July 2023

Tags: infrastructure, hotfix

[DRAFT SP-8896] KB-XXXX Kafka fails to start on Windows after applying hotfix

Elly Meng — Thu, 27 Jul 2023 20:11:59 GMT

Revision 19 posted to Appian Knowledge Base by Elly Meng on 7/27/2023 8:11:59 PM

Symptoms

After applying a hotfix released after June 5th on Appian 21.3 and later, Kafka fails to start on Windows and prevents site startup.

Zookeeper is able to start.
The following message is repeated in the console output:

waiting for process Kafka
waiting for process Kafka
waiting for process Kafka
waiting for process Kafka

Eventually, the following errors are displayed in the console output:

Service Kafka failed to start
Error running script: Unable to start transaction log.
Unable to start distributed transaction log. Check the Kafka and Zookeeper logs for more information.
com.appian.komodo.StartKomodo$TransactionLogNotStartedException: Unable to start transaction log.

Cause

Self-managed hotfix packages meant for Windows contained the Unix Kafka version instead of the Windows version. This incompatibility caused Kafka to fail startup for sites using these hotfixes.

The fix has been merged into all the available hotfixes for Appian 21.3 and higher.
Note: This is a short-term fix and requires the following manual intervention to function successfully.

Action

Until further notice, all self-managed Windows customers using one of the following affected hotfix versions are required to perform manual intervention:

21.3.2160.0 to latest
21.4.1915.0 to latest
22.1.1630.0 to latest
22.2.1315.0 to latest
22.3.1075.0 to latest
22.4.850.0 to latest
23.1.525.0 to latest
23.2.235.0 to latest

If the hotfix has been attempted but failed, please ensure that you have a full system backup taken prior to the hotfix, and then proceed to restore the backup.
Download the latest hotfix package for your Appian installation.
The kafka-server_<version>-appian-<number>.tgz at the root of the hotfix package contains the correct version.
1. Follow the steps from the hotfix installation up until (and including) the step to unzip updates.zip.
2. Under <APPIAN_HOME>/services, delete the kafka-<version> directory.
3. Unzip kafka-server_<version>-appian-<number>.tgz and move the generated kafka-<version> directory into <APPIAN_HOME>/services.
4. Delete kafka-server_<version>-appian-<number>.tgz
5. Proceed with the remaining steps to install the hotfix as normal.

Affected Versions

This article applies to self-managed Appian 21.3 and later hosted on Windows.

Last Reviewed: July 2023

Tags: infrastructure, hotfix

[DRAFT SP-8896] KB-XXXX Kafka fails to start on Windows after applying hotfix

pauline.delacruz — Thu, 27 Jul 2023 20:02:28 GMT

Revision 18 posted to Appian Knowledge Base by pauline.delacruz on 7/27/2023 8:02:28 PM

Symptoms

After applying hotfixes released after June 5th on Appian 21.3 and later, Appian on Windows fails to start Kafka, thus preventing the site from starting up.

Zookeeper is able to start up after applying the hotfix.
Upon Kafka startup, the following message is continuously repeated in the console output:

waiting for process Kafka
waiting for process Kafka
waiting for process Kafka
waiting for process Kafka

Eventually, Kafka fails to start, and the following errors are displayed in the console output:

Service Kafka failed to start
Error running script: Unable to start transaction log.
Unable to start distributed transaction log. Check the Kafka and Zookeeper logs for more information.
com.appian.komodo.StartKomodo$TransactionLogNotStartedException: Unable to start transaction log.

Cause

Self-managed hotfix packages meant for Windows contained the Unix Kafka version instead of the Windows Kafka. This incompatibility caused Kafka to fail startup for all self-managed Windows customers after applying the hotfix.

The fix has been merged into all the available hotfixes for Appian 21.3 and later.
Note: This is a short-term fix and requires manual intervention to function successfully.

Action

Until further notice, all self-managed Windows customers using a hotfix package are required to perform manual intervention, applicable for the following hotfixes:

21.3.2160.0 to the latest hotfix available
21.4.1915.0 to the latest hotfix available
22.1.1630.0 to the latest hotfix available
22.2.1315.0 to the latest hotfix available
22.3.1075.0 to the latest hotfix available
22.4.850.0 to the latest hotfix available
23.1.525.0 to the latest hotfix available
23.2.235.0 to the latest hotfix available

If the hotfix has been attempted but failed, please ensure that you have a full system backup taken prior to the hotfix, and then proceed to restore the backup.
Download the latest hotfix package for your Appian installation.
The kafka-server_<version>-appian-<number>.tgz at the root of the hotfix package contains the correct version.
1. Follow the steps from the hotfix installation up until (and including) the step to unzip updates.zip.
2. Under <APPIAN_HOME>/services, delete the kafka-<version> directory.
3. Unzip kafka-server_<version>-appian-<number>.tgz and move the generated kafka-<version> directory into <APPIAN_HOME>/services.
4. Delete kafka-server_<version>-appian-<number>.tgz
5. Proceed with the remaining steps to install the hotfix as normal.

Affected Versions

This article applies to self-managed Appian 21.3 and later hosted on Windows.

Last Reviewed: July 2023

Tags: infrastructure, hotfix

[DRAFT SP-8896] KB-XXXX Kafka fails to start on Windows after applying hotfix

pauline.delacruz — Thu, 27 Jul 2023 19:59:20 GMT

Revision 17 posted to Appian Knowledge Base by pauline.delacruz on 7/27/2023 7:59:20 PM

Symptoms

After applying hotfixes released after June 5th on Appian 21.3 and higher, Appian on Windows fails to start Kafka, thus preventing the site from starting up.

Zookeeper is able to start up after applying the hotfix.
Upon Kafka startup, the following message is continuously repeated in the console output:

waiting for process Kafka
waiting for process Kafka
waiting for process Kafka
waiting for process Kafka

Eventually, Kafka fails to start, and the following errors are displayed in the console output:

Service Kafka failed to start
Error running script: Unable to start transaction log.
Unable to start distributed transaction log. Check the Kafka and Zookeeper logs for more information.
com.appian.komodo.StartKomodo$TransactionLogNotStartedException: Unable to start transaction log.

Cause

The fix has been merged into all the available hotfixes for Appian 21.3 and higher.
Note: This is a short-term fix and requires manual intervention to function successfully.

Action

Until further notice, all self-managed Windows customers using a hotfix package are required to perform manual intervention, applicable for the following hotfixes:

21.3.2160.0 to the latest hotfix available
21.4.1915.0 to the latest hotfix available
22.1.1630.0 to the latest hotfix available
22.2.1315.0 to the latest hotfix available
22.3.1075.0 to the latest hotfix available
22.4.850.0 to the latest hotfix available
23.1.525.0 to the latest hotfix available
23.2.235.0 to the latest hotfix available

If the hotfix has been attempted but failed, please ensure that you have a full system backup taken prior to the hotfix, and then proceed to restore the backup.
Download the latest hotfix package for your Appian installation.
The kafka-server_<version>-appian-<number>.tgz at the root of the hotfix package contains the correct version.
1. Follow the steps from the hotfix installation up until (and including) the step to unzip updates.zip.
2. Under <APPIAN_HOME>/services, delete the kafka-<version> directory.
3. Unzip kafka-server_<version>-appian-<number>.tgz and move the generated kafka-<version> directory into <APPIAN_HOME>/services.
4. Delete kafka-server_<version>-appian-<number>.tgz
5. Proceed with the remaining steps to install the hotfix as normal.

Affected Versions

This article applies to self-managed Appian 21.3 and higher hosted on Windows.

Last Reviewed: July 2023

Tags: infrastructure, hotfix

[DRAFT SP-8896] KB-XXXX Kafka fails to start on Windows after applying hotfix

pauline.delacruz — Thu, 27 Jul 2023 19:58:43 GMT

Revision 16 posted to Appian Knowledge Base by pauline.delacruz on 7/27/2023 7:58:43 PM

Symptoms

After applying hotfixes released after June 5th on Appian 21.3 and higher, Appian on Windows fails to start Kafka, thus preventing the site from starting up.

Zookeeper is able to start up after applying the hotfix.
Upon Kafka startup, the following message is continuously repeated in the console output:

waiting for process Kafka
waiting for process Kafka
waiting for process Kafka
waiting for process Kafka

Eventually, Kafka fails to start, and the following errors are displayed in the console output:

Service Kafka failed to start
Error running script: Unable to start transaction log.
Unable to start distributed transaction log. Check the Kafka and Zookeeper logs for more information.
com.appian.komodo.StartKomodo$TransactionLogNotStartedException: Unable to start transaction log.

Cause

The fix has been merged into all the available hotfixes for Appian 21.3 and higher.
Note: This is a short-term fix and requires manual intervention to function successfully.

Action

Until further notice, all self-managed Windows customers using a hotfix package are required to perform manual intervention, applicable for the following hotfixes:

21.3.2160.0 to the latest hotfix available
21.4.1915.0 to the latest hotfix available
22.1.1630.0 to the latest hotfix available
22.2.1315.0 to the latest hotfix available
22.3.1075.0 to the latest hotfix available
22.4.850.0 to the latest hotfix available
23.1.525.0 to the latest hotfix available
23.2.235.0 to the latest hotfix available

If the hotfix has been attempted but failed, please ensure that you have a full system backup taken prior to the hotfix, and then proceed to restore the backup.
Download the latest hotfix package for your Appian installation.
The kafka-server_<version>-appian-<number>.tgz at the root of the hotfix package contains the correct version.
1. Follow the steps from the hotfix installation up until (and including) the step to unzip updates.zip.
2. Under <APPIAN_HOME>/services, delete the kafka-<version> directory.
3. Unzip kafka-server_<version>-appian-<number>.tgz and move the generated kafka-<version> directory into <APPIAN_HOME>/services.
4. Delete kafka-server_<version>-appian-<number>.tgz
5. Proceed with the remaining steps to install the hotfix as normal.

Affected Versions

This article applies to self-managed Appian 21.3 and higher hosted on Windows.

Last Reviewed: July 2023

Tags: infrastructure, hotfix

[DRAFT SP-8896] KB-XXXX Kafka fails to start on Windows after applying hotfix

pauline.delacruz — Thu, 27 Jul 2023 19:52:58 GMT

Revision 15 posted to Appian Knowledge Base by pauline.delacruz on 7/27/2023 7:52:58 PM

Symptoms

After applying hotfixes released after June 5th on Appian 21.3 and higher, Appian on Windows fails to start Kafka, thus preventing the site from starting up.

Zookeeper is able to start up after applying the hotfix.
Upon Kafka startup, the following message is continuously repeated in the console output:

waiting for process Kafka
waiting for process Kafka
waiting for process Kafka
waiting for process Kafka

Eventually, Kafka fails to start, and the following errors are displayed in the console output:

Service Kafka failed to start
Error running script: Unable to start transaction log.
Unable to start distributed transaction log. Check the Kafka and Zookeeper logs for more information.
com.appian.komodo.StartKomodo$TransactionLogNotStartedException: Unable to start transaction log.

Cause

The fix has been merged into all the available hotfixes for Appian 21.3 and higher.
Note: This is a short-term fix and requires manual intervention to function successfully.

Action

Until further notice, all self-managed Windows customers using a hotfix package are required to perform manual intervention, applicable for the following hotfixes:

21.3.2160.0 to the latest hotfix available
21.4.1915.0 to the latest hotfix available
22.1.1630.0 to the latest hotfix available
22.2.1315.0 to the latest hotfix available
22.3.1075.0 to the latest hotfix available
22.4.850.0 to the latest hotfix available
23.1.525.0 to the latest hotfix available
23.2.235.0 to the latest hotfix available

If the hotfix has been attempted but failed, please ensure that you have a full system backup taken prior to the hotfix, and then proceed to restore the backup.
Download the latest hotfix package for your Appian installation from the links in Appian Hotfixes.
The kafka-server_<version>-appian-<number>.tgz at the root of the hotfix package contains the correct version.
1. Follow the steps from the hotfix installation up until (and including) the step to unzip updates.zip.
2. Under <APPIAN_HOME>/services, delete the kafka-<version> directory.
3. Unzip kafka-server_<version>-appian-<number>.tgz and move the generated kafka-<version> directory into <APPIAN_HOME>/services.
4. Delete kafka-server_<version>-appian-<number>.tgz
5. Proceed with the remaining steps to install the hotfix as normal.

Affected Versions

This article applies to self-managed Appian 21.3 and higher hosted on Windows.

Last Reviewed: July 2023

Tags: infrastructure, hotfix

[DRAFT SP-8896] KB-XXXX Kafka fails to start on Windows after applying hotfix

pauline.delacruz — Thu, 27 Jul 2023 19:34:00 GMT

Revision 14 posted to Appian Knowledge Base by pauline.delacruz on 7/27/2023 7:34:00 PM

Symptoms

After applying hotfixes released after June 5th on Appian 21.3 and higher, Appian on Windows fails to start Kafka, thus preventing the site from starting up.

Zookeeper is able to start up after applying the hotfix.
Upon Kafka startup, the following message is continuously repeated in the console output:

waiting for process Kafka
waiting for process Kafka
waiting for process Kafka
waiting for process Kafka

Eventually, Kafka fails to start, and the following errors are displayed in the console output:

Service Kafka failed to start
Error running script: Unable to start transaction log.
Unable to start distributed transaction log. Check the Kafka and Zookeeper logs for more information.
com.appian.komodo.StartKomodo$TransactionLogNotStartedException: Unable to start transaction log.

Cause

As of June 12, the Windows and Unix installers contained different versions of Kafka. This change was backported through 21.3. However, all self-managed hotfix packages generated after June 12 contained the Unix Kafka version. The incompatibility caused Kafka to fail to start for all self-managed Windows customers after hotfix application.

Appian has merged the fix and merged into all the hotfixes available on docs.appian.com for 21.3 and higher.
Note: This is a short-term fix and requires manual intervention to function successfully.

Until further notice, all self-managed Windows customers using a hotfix package are required to perform manual intervention, applicable for the following hotfixes:

21.3.2160.0 to the latest hotfix available
21.4.1915.0 to the latest hotfix available
22.1.1630.0 to the latest hotfix available
22.2.1315.0 to the latest hotfix available
22.3.1075.0 to the latest hotfix available
22.4.850.0 to the latest hotfix available
23.1.525.0 to the latest hotfix available
23.2.235.0 to the latest hotfix available

Action

If the hotfix has been attempted but failed, please ensure that you have a full system backup taken prior to the hotfix, and then proceed to restore the backup.
Download the latest hotfix package for your Appian installation from the links in Appian Hotfixes.
The kafka-server_<version>-appian-<number>.tgz at the root of the hotfix package contains the correct version.
1. Follow the steps from the hotfix installation up until (and including) the step to unzip updates.zip.
2. Under <APPIAN_HOME>/services, delete the kafka-<version> directory.
3. Unzip kafka-server_<version>-appian-<number>.tgz and move the generated kafka-<version> directory into <APPIAN_HOME>/services.
4. Delete kafka-server_<version>-appian-<number>.tgz
5. Proceed with the remaining steps to install the hotfix as normal.

Affected Versions

This article applies to self-managed Appian 21.3 and higher hosted on Windows.

Last Reviewed: July 2023

Tags: infrastructure, hotfix

[DRAFT SP-8896] KB-XXXX Kafka fails to start on Windows after applying hotfix

pauline.delacruz — Thu, 27 Jul 2023 19:32:09 GMT

Revision 13 posted to Appian Knowledge Base by pauline.delacruz on 7/27/2023 7:32:09 PM

Symptoms

After applying hotfixes released after June 5th on Appian 21.3 and higher, Appian on Windows fails to start Kafka, thus preventing the site from starting up.

Zookeeper is able to start up after applying the hotfix.
Upon Kafka startup, the following message is continuously repeated in the console output:

waiting for process Kafka
waiting for process Kafka
waiting for process Kafka
waiting for process Kafka

Eventually, Kafka fails to start, and the following errors are displayed in the console output:

Service Kafka failed to start
Error running script: Unable to start transaction log.
Unable to start distributed transaction log. Check the Kafka and Zookeeper logs for more information.
com.appian.komodo.StartKomodo$TransactionLogNotStartedException: Unable to start transaction log.

Cause

Until further notice, all self-managed Windows customers using a hotfix package are required to perform manual intervention, applicable for the following hotfixes:

21.3.2160.0 to the latest hotfix available
21.4.1915.0 to the latest hotfix available
22.1.1630.0 to the latest hotfix available
22.2.1315.0 to the latest hotfix available
22.3.1075.0 to the latest hotfix available
22.4.850.0 to the latest hotfix available
23.1.525.0 to the latest hotfix available
23.2.235.0 to the latest hotfix available

Action

If the hotfix has been attempted but failed, please ensure that you have a full system backup taken prior to the hotfix, and then proceed to restore the backup.
Download the latest hotfix package for your Appian installation from the links in Appian Hotfixes.
The kafka-server_<version>-appian-<number>.tgz at the root of the hotfix package contains the correct version.
1. Follow the steps from the hotfix installation up until (and including) the step to unzip updates.zip
2. Under <APPIAN_HOME>/services, delete the kafka-<version> directory.
3. Unzip kafka-server_<version>-appian-<number>.tgz and move the generated kafka-<version> directory into <APPIAN_HOME>/services.
4. Delete kafka-server_<version>-appian-<number>.tgz
5. Proceed with the remaining steps to install the hotfix as normal.

Affected Versions

This article applies to self-managed Appian 21.3 and higher hosted on Windows.

Last Reviewed: July 2023

Tags: infrastructure, hotfix

[DRAFT SP-8896] KB-XXXX Kafka fails to start on Windows after applying hotfix

pauline.delacruz — Wed, 26 Jul 2023 21:17:11 GMT

Revision 12 posted to Appian Knowledge Base by pauline.delacruz on 7/26/2023 9:17:11 PM

Symptoms

After applying hotfixes released after June 5th on versions 21.3 and higher, Appian on Windows fails to start Kafka, thus preventing the site from starting up.

Zookeeper is able to start up after hotfix application
During Kafka startup, the following message is repeated constantly in the console output

waiting for process Kafka
waiting for process Kafka
waiting for process Kafka
waiting for process Kafka

Eventually, Kafka fails to start with the following errors in the console output:

Service Kafka failed to start
Error running script: Unable to start transaction log.
Unable to start distributed transaction log. Check the Kafka and Zookeeper logs for more information.
com.appian.komodo.StartKomodo$TransactionLogNotStartedException: Unable to start transaction log.

Cause

Until further notified, all self-managed Windows customers using a hotfix package will require manual intervention described in the Action section, applicable for the following hotfixes:

21.3.2160.0 to the latest hotfix available
21.4.1915.0 to the latest hotfix available
22.1.1630.0 to the latest hotfix available
22.2.1315.0 to the latest hotfix available
22.3.1075.0 to the latest hotfix available
22.4.850.0 to the latest hotfix available
23.1.525.0 to the latest hotfix available
23.2.235.0 to the latest hotfix available

Action

If the hotfix has been attempted and failed, confirm that you have a full system backup taken prior to the hotfix and restore the backup.
Download the latest hotfix package from the links in hotfix documentation.
In the hotfix package, the kafka-server_<version>-appian-<number>.tgz at the root of the hotfix package contains the correct version.
1. Follow the steps from the hotfix installation up until (and including) the step to unzip updates.zip
2. Under <APPIAN_HOME>/services, delete the kafka-<version> directory.
3. Unzip kafka-server_<version>-appian-<number>.tgz and move the generated kafka-<version> directory into <APPIAN_HOME>/services.
4. Delete kafka-server_<version>-appian-<number>.tgz
5. Proceed with the rest of the hotfix instructions as normal.

Affected Versions

This article applies to self-managed Appian 21.3 and higher hosted on Windows.

Last Reviewed: July 2023

Tags: infrastructure, hotfix

KB [draft] Kafka fails to start on Windows after applying hotfix

Yiyi Tao — Wed, 26 Jul 2023 20:20:48 GMT

Revision 11 posted to Appian Knowledge Base by Yiyi Tao on 7/26/2023 8:20:48 PM

Symptoms

After applying hotfixes released after June 5th on versions 21.3 and higher, Appian on Windows fails to start Kafka, thus preventing the site from starting up.

Zookeeper is able to start up after hotfix application
During Kafka startup, the following message is repeated constantly in the console output

waiting for process Kafka
waiting for process Kafka
waiting for process Kafka
waiting for process Kafka

Eventually, Kafka fails to start with the following errors in the console output:

Service Kafka failed to start
Error running script: Unable to start transaction log.
Unable to start distributed transaction log. Check the Kafka and Zookeeper logs for more information.
com.appian.komodo.StartKomodo$TransactionLogNotStartedException: Unable to start transaction log.

Cause

Appian has merged the fix and merged into all the hotfixes available on docs.appian.com for version 21.3 and higher. Note that this is a short-term fix and requires manual intervention to function successfully.

Until further notified, all self-managed Windows customers using a hotfix package will require manual intervention described in Action section, applicable for the following hotfixes:

21.3.2160.0 to the latest hotfix available
21.4.1915.0 to the latest hotfix available
22.1.1630.0 to the latest hotfix available
22.2.1315.0 to the latest hotfix available
22.3.1075.0 to the latest hotfix available
22.4.850.0 to the latest hotfix available
23.1.525.0 to the latest hotfix available
23.2.235.0 to the latest hotfix available

Action

If hotfix has been attempted and failed, confirm that you have a full system backup taken prior to the hotfix and restore the backup.
Download the latest hotfix package from the links in hotfix documentation.
In the hotfix package, the kafka-server_<version>-appian-<number>.tgz at the root of the hotfix package contains the correct version.
1. Follow the steps in the hotfix documentation up until (and including) the step to unzip updates.zip
2. Under <APPIAN_HOME>/services, delete the kafka-<version> directory.
3. Unzip kafka-server_<version>-appian-<number>.tgz and move the generated kafka-<version> directory into <APPIAN_HOME>/services.
4. Delete kafka-server_<version>-appian-<number>.tgz
5. Proceed with the rest of the hotfix instructions as normal.

Affected Versions

This section includes any relevant version information for Appian or other third/party configurations. Some examples of valid affected versions are as follows:

This article applies to 21.3 and higher versions of Appian on Windows
This article is applicable to self-managed only

Last Reviewed: July 2023

Tags: infrastructure, hotfix

KB [draft] Kafka fails to start on Windows after applying hotfix

Yiyi Tao — Wed, 26 Jul 2023 20:19:23 GMT

Revision 10 posted to Appian Knowledge Base by Yiyi Tao on 7/26/2023 8:19:23 PM

Symptoms

After applying hotfixes released after June 5th on versions 21.3 and higher, Appian on Windows fails to start Kafka, thus preventing the site from starting up.

Zookeeper is able to start up after hotfix application
During Kafka startup, the following message is repeated constantly in the console output

waiting for process Kafka
waiting for process Kafka
waiting for process Kafka
waiting for process Kafka

Eventually, Kafka fails to start with the following errors in the console output:

Service Kafka failed to start
Error running script: Unable to start transaction log.
Unable to start distributed transaction log. Check the Kafka and Zookeeper logs for more information.
com.appian.komodo.StartKomodo$TransactionLogNotStartedException: Unable to start transaction log.

Cause

Until further notified, all self-managed Windows customers using a hotfix package will require manual intervention described in Action section, applicable for the following hotfixes:

21.3.2160.0 to the latest hotfix available

21.4.1915.0 to the latest hotfix available

22.1.1630.0 to the latest hotfix available

22.2.1315.0 to the latest hotfix available

22.3.1075.0 to the latest hotfix available

22.4.850.0 to the latest hotfix available

23.1.525.0 to the latest hotfix available

23.2.235.0 to the latest hotfix available

Action

If hotfix has been attempted and failed, confirm that you have a full system backup taken prior to the hotfix and restore the backup.
Download the latest hotfix package from the links in hotfix documentation.
In the hotfix package, the kafka-server_<version>-appian-<number>.tgz at the root of the hotfix package contains the correct version.
1. Follow the steps in the hotfix documentation up until (and including) the step to unzip updates.zip
2. Under <APPIAN_HOME>/services, delete the kafka-<version> directory.
3. Unzip kafka-server_<version>-appian-<number>.tgz and move the generated kafka-<version> directory into <APPIAN_HOME>/services.
4. Delete kafka-server_<version>-appian-<number>.tgz
5. Proceed with the rest of the hotfix instructions as normal.

Affected Versions

This section includes any relevant version information for Appian or other third/party configurations. Some examples of valid affected versions are as follows:

This article applies to 21.3 and higher versions of Appian on Windows
This article is applicable to self-managed only

Last Reviewed: July 2023

Tags: infrastructure, hotfix

KB [draft] Kafka fails to start on Windows after applying hotfix

Yiyi Tao — Tue, 25 Jul 2023 22:12:19 GMT

Revision 9 posted to Appian Knowledge Base by Yiyi Tao on 7/25/2023 10:12:19 PM

Symptoms

After applying hotfixes released after June 5th on versions 21.3 and higher, Appian on Windows fails to start Kafka, thus preventing the site from starting up.

Zookeeper is able to start up after hotfix application
During Kafka startup, the following message is repeated constantly in the console output

waiting for process Kafka
waiting for process Kafka
waiting for process Kafka
waiting for process Kafka

Eventually, Kafka fails to start with the following errors in the console output:

Service Kafka failed to start
Error running script: Unable to start transaction log.
Unable to start distributed transaction log. Check the Kafka and Zookeeper logs for more information.
com.appian.komodo.StartKomodo$TransactionLogNotStartedException: Unable to start transaction log.

Cause

Until further notified, all self-managed Windows customers using a hotfix package will require manual intervention described in Action section.

Action

If hotfix has been attempted and failed, confirm that you have a full system backup taken prior to the hotfix and restore the backup.
Download the latest hotfix package from the links in hotfix documentation.
In the hotfix package, the kafka-server_<version>-appian-<number>.tgz at the root of the hotfix package contains the correct version.
1. Follow the steps in the hotfix documentation up until (and including) the step to unzip updates.zip
2. Under <APPIAN_HOME>/services, delete the kafka-<version> directory.
3. Unzip kafka-server_<version>-appian-<number>.tgz and move the generated kafka-<version> directory into <APPIAN_HOME>/services.
4. Proceed with the rest of the hotfix instructions as normal.

Affected Versions

This section includes any relevant version information for Appian or other third/party configurations. Some examples of valid affected versions are as follows:

This article applies to 21.3 and higher versions of Appian on Windows
This article is applicable to self-managed only

Last Reviewed: July 2023

Tags: infrastructure, hotfix

KB [draft] Kafka fails to start on Windows after applying hotfix

Yiyi Tao — Tue, 25 Jul 2023 22:11:22 GMT

Revision 8 posted to Appian Knowledge Base by Yiyi Tao on 7/25/2023 10:11:22 PM

Symptoms

After applying hotfixes released after June 5th on versions 21.3 and higher, Appian on Windows fails to start Kafka, thus preventing the site from starting up.

Zookeeper is able to start up after hotfix application
During Kafka startup, the following message is repeated constantly in the console output

waiting for process Kafka
waiting for process Kafka
waiting for process Kafka
waiting for process Kafka

Eventually, Kafka fails to start with the following errors in the console output:

Service Kafka failed to start
Error running script: Unable to start transaction log.
Unable to start distributed transaction log. Check the Kafka and Zookeeper logs for more information.
com.appian.komodo.StartKomodo$TransactionLogNotStartedException: Unable to start transaction log.

Cause

Until further notified, all self-managed Windows customers using a hotfix package will require manual intervention described in Action section.

Action

If hotfix has been attempted and failed, confirm that you have a full system backup taken prior to the hotfix and restore the backup.
Download the latest hotfix package from the links in hotfix documentation.
In the hotfix package, the kafka-server_<version>-appian-<number>.tgz at the root of the hotfix package contains the correct version.
1. Follow the steps in the hotfix documentation up until (and including) the step to unzip updates.zip
2. Under <APPIAN_HOME>/services, delete the kafka-<version> directory.
3. Unzip kafka-server_<version>-appian-<number>.tgz and move the generated kafka-<version> directory into <APPIAN_HOME>/services.
4. Proceed with the rest of the hotfix instructions as normal.

Affected Versions

This section includes any relevant version information for Appian or other third/party configurations. Some examples of valid affected versions are as follows:

This article applies to 21.3 and higher versions of Appian on Windows
This article is applicable to self-managed only

Last Reviewed: July 2023

KB [draft] Kafka fails to start on Windows after applying hotfix

Yiyi Tao — Tue, 25 Jul 2023 22:09:30 GMT

Revision 7 posted to Appian Knowledge Base by Yiyi Tao on 7/25/2023 10:09:30 PM

Symptoms

After applying hotfixes released after June 5th on versions 21.3 and higher, Appian on Windows fails to start Kafka, thus preventing the site from starting up.

Zookeeper is able to start up after hotfix application
During Kafka startup, the following message is repeated constantly in the console output

waiting for process Kafka
waiting for process Kafka
waiting for process Kafka
waiting for process Kafka

Eventually, Kafka fails to start with the following errors in the console output:

Service Kafka failed to start
Error running script: Unable to start transaction log.
Unable to start distributed transaction log. Check the Kafka and Zookeeper logs for more information.
com.appian.komodo.StartKomodo$TransactionLogNotStartedException: Unable to start transaction log.

Cause

Until further notified, all self-managed Windows customers using a hotfix package will require manual intervention described in Action section.

Action

If hotfix has been attempted and failed, confirm that you have a full system backup taken prior to the hotfix and restore the backup.
Download the latest hotfix package from the links in hotfix documentation.
In the hotfix package, the kafka-server_<version>-appian-<number>.tgz at the root of the hotfix package contains the correct version.
1. Follow the steps in the hotfix documentation up until (and including) the step to unzip updates.zip
2. Under <APPIAN_HOME>/services, delete the kafka-<version> directory.
3. Unzip kafka-server_<version>-appian-<number>.tgz and move the generated kafka-<version> directory into <APPIAN_HOME>/services.
4. Proceed with the rest of the hotfix instructions as normal.

Affected Versions

This section includes any relevant version information for Appian or other third/party configurations. Some examples of valid affected versions are as follows:

This article applies to 21.3 and higher versions of Appian on Windows
This article is applicable to self-managed only

Last Reviewed: July 2023