KB-2032 Tomcat fails to start with "Connection has been abandoned" warning

Parmida Borhani — Mon, 02 Dec 2019 22:44:34 GMT

Current Revision posted to Appian Knowledge Base by Parmida Borhani on 12/2/2019 10:44:34 PM

Symptoms

Tomcat is not able to start after changes have been made to <APPIAN_HOME>/conf/tomcat-resources.xml. The following error can be seen in the application server log:

WARNING [Tomcat JDBC Pool Cleaner[xxxxxxxxxx:xxxxxxxx]] org.apache.tomcat.jdbc.pool.ConnectionPool.abandon Connection has been abandoned PooledConnection[com.xxx.xxx.xxx.xxx]:java.lang.Exception

Cause

This issue occurs when <APPIAN_HOME>/conf/tomcat-resources.xml has the below properties set:

removeAbandoned="true"
removeAbandonedTimeout="30"
logAbandoned="true"

Action

Set removeAbandoned="false" or remove the properties listed in the cause from tomcat-resources.xml.

The Configuring Relational Databases documentation contains recommendations on which properties should be set in tomcat-resources.xml.

Affected Versions

This article applies to Appian 18.3 and later.

Last Reviewed: December 2019

Tags: Tomcat, connection pool, database, application server, timeout, infrastructure

KB-2032 Tomcat fails to start with "Connection has been abandoned" warning

Rebecca Jonas — Mon, 02 Dec 2019 22:05:59 GMT

Revision 15 posted to Appian Knowledge Base by Rebecca Jonas on 12/2/2019 10:05:59 PM

Symptoms

Tomcat is not able to start after changes have been made to <APPIAN_HOME>/conf/tomcat-resources.xml. The following error can be seen in the application server log:

WARNING [Tomcat JDBC Pool Cleaner[xxxxxxxxxx:xxxxxxxx]] org.apache.tomcat.jdbc.pool.ConnectionPool.abandon Connection has been abandoned PooledConnection[com.xxx.xxx.xxx.xxx]:java.lang.Exception

Cause

This issue occurs when <APPIAN_HOME>/conf/tomcat-resources.xml has the below properties set:

removeAbandoned="true"
removeAbandonedTimeout="30"
logAbandoned="true"

Action

Set removeAbandoned="false" or remove the properties listed in the cause from tomcat-resources.xml.

The Configuring Relational Databases documentation contains recommendations on which properties should be set in tomcat-resources.xml.

Affected Versions

This article applies to Appian 18.3 and later.

Last Reviewed: December 2019

Tags: Tomcat, connection pool, database, application server, timeout, infrastructure

[DRAFT] KB-XXXX Tomcat fails to start with "Connection has been abandoned" warning

Saurabh Pisal — Wed, 13 Nov 2019 15:36:35 GMT

Revision 14 posted to Appian Knowledge Base by Saurabh Pisal on 11/13/2019 3:36:35 PM

Symptoms

Tomcat is not able to start after changes have been made to <APPIAN_HOME>/conf/tomcat-resources.xml. The following error can be seen in the application server log:

WARNING [Tomcat JDBC Pool Cleaner[xxxxxxxxxx:xxxxxxxx]] org.apache.tomcat.jdbc.pool.ConnectionPool.abandon Connection has been abandoned PooledConnection[com.xxx.xxx.xxx.xxx]:java.lang.Exception

Cause

This issue occurs when <APPIAN_HOME>/conf/tomcat-resources.xml has the below properties set:

removeAbandoned="true"
removeAbandonedTimeout="30"
logAbandoned="true"

The error above occurs mainly due to the removeAbandonedTimeout value being present and the removeAbandoned value being set to "true"

Action

Set removeAbandoned="false" or remove the properties listed in the cause from tomcat-resources.xml.

The Configuring Relational Databases documentation contains recommendations on which properties should be set in tomcat-resources.xml.

Affected Versions

This article applies to Appian 18.3 and later.

Last Reviewed: November 2019

Tags: Tomcat, connection pool, database, application server, timeout, infrastructure

[DRAFT] KB-XXXX Tomcat fails to start with "Connection has been abandoned" warning

Rebecca Jonas — Wed, 06 Nov 2019 21:50:17 GMT

Revision 13 posted to Appian Knowledge Base by Rebecca Jonas on 11/6/2019 9:50:17 PM

Symptoms

Tomcat is not able to start after changes have been made to <APPIAN_HOME>/conf/tomcat-resources.xml. The following error can be seen in the application server log:

WARNING [Tomcat JDBC Pool Cleaner[xxxxxxxxxx:xxxxxxxx]] org.apache.tomcat.jdbc.pool.ConnectionPool.abandon Connection has been abandoned PooledConnection[com.xxx.xxx.xxx.xxx]:java.lang.Exception

Cause

This issue occurs when <APPIAN_HOME>/conf/tomcat-resources.xml has the below properties set:

removeAbandoned="true"
removeAbandonedTimeout="30"
logAbandoned="true"

The error above occurs mainly due to the removeAbandonedTimeout value being present and the removeAbandoned value being set to "true"

Action

Set removeAbandoned="false" or remove the properties listed in the cause from tomcat-resources.xml.

The Configuring Relational Databases documentation contains recommendations on which properties should be set in tomcat-resources.xml.

Affected Versions

This article applies to Appian 18.3 and later.

Last Reviewed: November 2019

Tags: Tomcat, connection pool, database, application server, timeout, infrastructure

[DRAFT] KB-XXXX Tomcat fails to start with "Connection has been abandoned" warning

Rebecca Jonas — Wed, 06 Nov 2019 21:33:10 GMT

Revision 12 posted to Appian Knowledge Base by Rebecca Jonas on 11/6/2019 9:33:10 PM

Symptoms

Tomcat is not able to start after changes have been made to <APPIAN_HOME>/conf/tomcat-resources.xml. The following error can be seen in the application server log:

WARNING [Tomcat JDBC Pool Cleaner[xxxxxxxxxx:xxxxxxxx]] org.apache.tomcat.jdbc.pool.ConnectionPool.abandon Connection has been abandoned PooledConnection[com.xxx.xxx.xxx.xxx]:java.lang.Exception

Cause

This issue occurs when <APPIAN_HOME>/conf/tomcat-resources.xml has the below properties set:

removeAbandoned="true"
removeAbandonedTimeout="30"
logAbandoned="true"

The error above occurs mainly due to the removeAbandonedTimeout value being present and the removeAbandoned value being set to "true"

Action

Set removeAbandoned="false" or remove the properties listed in the cause from tomcat-resources.xml.

The Configuring Relational Databases documentation contains recommendations on which properties should be set in tomcat-resources.xml.

Affected Versions

This article applies to Appian 18.3 and later.

Last Reviewed November 2019

Tags: Tomcat, connection pool, database, application server, timeout, infrastructure

[DRAFT] KB-XXXX Tomcat fails to start with "Connection has been abandoned" warning

Saurabh Pisal — Tue, 05 Nov 2019 17:37:12 GMT

Revision 11 posted to Appian Knowledge Base by Saurabh Pisal on 11/5/2019 5:37:12 PM

Symptoms

Tomcat is not able to start after changes have been made to <APPIAN_HOME>/conf/tomcat-resources.xml. The following error can be seen in the application server log:

WARNING [Tomcat JDBC Pool Cleaner[xxxxxxxxxx:xxxxxxxx]] org.apache.tomcat.jdbc.pool.ConnectionPool.abandon Connection has been abandoned PooledConnection[com.xxx.xxx.xxx.xxx]:java.lang.Exception

Cause

This issue occurs when <APPIAN_HOME>/conf/tomcat-resources.xml has the below properties set:

removeAbandoned="true"
removeAbandonedTimeout="30"
logAbandoned="true"

The error above occurs mainly due to the removeAbandonedTimeout value being present and the removeAbandoned value being set to "true"

Action

Set removeAbandoned="false" or remove the properties listed in the cause from tomcat-resources.xml.

The documentation on tomcat-resources.xml default for Configuring Relational Databases can be found here.

The documentation doesn't recommend having the below in <APPIAN_HOME>/conf/tomcat-resources.xml

removeAbandoned="true"
removeAbandonedTimeout="30"
logAbandoned="true"

Affected Versions

This article applies to Appian 18.3 and later.

Last Reviewed October 2019

Tags: Tomcat, connection pool, database, application server, timeout, infrastructure

[DRAFT] KB-XXXX Tomcat fails to start with "Connection has been abandoned" warning

Saurabh Pisal — Tue, 05 Nov 2019 16:43:33 GMT

Revision 10 posted to Appian Knowledge Base by Saurabh Pisal on 11/5/2019 4:43:33 PM

Symptoms

Tomcat is not able to start after changes have been made to <APPIAN_HOME>/conf/tomcat-resources.xml. The following error can be seen in the application server log:

WARNING [Tomcat JDBC Pool Cleaner[xxxxxxxxxx:xxxxxxxx]] org.apache.tomcat.jdbc.pool.ConnectionPool.abandon Connection has been abandoned PooledConnection[com.xxx.xxx.xxx.xxx]:java.lang.Exception

Cause

This issue occurs when <APPIAN_HOME>/conf/tomcat-resources.xml has the below properties set:

removeAbandoned="true"
removeAbandonedTimeout="30"
logAbandoned="true"

The error above occurs mainly due to the removeAbandonedTimeout value being present and the removeAbandoned value being set to "true"

Action

Set removeAbandoned="false" or remove the properties listed in the cause from tomcat-resources.xml.

The documentation on tomcat-resources.xml default for Configuring Relational Databases can be found here.

The documentation doesn't recommend having the below in <APPIAN_HOME>/conf/tomcat-resources.xml

removeAbandoned="true"
removeAbandonedTimeout="30"
logAbandoned="true"

Affected Versions

This article applies to Appian 18.3 and later.

Last Reviewed

October 2019

Tags: Tomcat, connection pool, database, application server, timeout, infrastructure

[DRAFT] KB-XXXX Tomcat fails to start with "Connection has been abandoned" warning

Rebecca Jonas — Mon, 04 Nov 2019 19:52:00 GMT

Revision 9 posted to Appian Knowledge Base by Rebecca Jonas on 11/4/2019 7:52:00 PM

Symptoms

Tomcat is not able to start after changes have been made to <APPIAN_HOME>/conf/tomcat-resources.xml. The following error can be seen in the application server log:

WARNING [Tomcat JDBC Pool Cleaner[xxxxxxxxxx:xxxxxxxx]] org.apache.tomcat.jdbc.pool.ConnectionPool.abandon Connection has been abandoned PooledConnection[com.xxx.xxx.xxx.xxx]:java.lang.Exception

Cause

This issue occurs when <APPIAN_HOME>/conf/tomcat-resources.xml has the below properties set:

removeAbandoned="true"
removeAbandonedTimeout="30"
logAbandoned="true"

The error above occurs mainly due to the removeAbandonedTimeout value being present and the removeAbandoned value being set to "true"

Action

Set removeAbandoned="false" or remove the properties listed in the cause from tomcat-resources.xml.

The documentation for Configuring Relational Databases can be found docs.appian.com/.../Configuring_Relational_Databases.html.

The documentation doesn't recommend having the below in <APPIAN_HOME>/conf/tomcat-resources.xml

removeAbandoned="true"
removeAbandonedTimeout="30"
logAbandoned="true"

Affected Versions

This article applies to Appian 18.3 and later.
Last Reviewed : October 2019

Tags: Tomcat, connection pool, database, application server, timeout, infrastructure

[DRAFT] KB-XXXX Tomcat fails to start with "Connection has been abandoned" warning

Rebecca Jonas — Mon, 04 Nov 2019 19:51:20 GMT

Revision 8 posted to Appian Knowledge Base by Rebecca Jonas on 11/4/2019 7:51:20 PM

Symptoms

Tomcat is not able to start after changes have been made to <APPIAN_HOME>/conf/tomcat-resources.xml. The following error can be seen in the application server log:

WARNING [Tomcat JDBC Pool Cleaner[xxxxxxxxxx:xxxxxxxx]] org.apache.tomcat.jdbc.pool.ConnectionPool.abandon Connection has been abandoned PooledConnection[com.xxx.xxx.xxx.xxx]:java.lang.Exception

Cause

This issue occurs when <APPIAN_HOME>/conf/tomcat-resources.xml has the below properties set:

removeAbandoned="true"
removeAbandonedTimeout="30"
logAbandoned="true"

The error above occurs mainly due to the removeAbandonedTimeout value being present and the removeAbandoned value being set to "true"

Action

Set removeAbandoned ="false" or remove the properties listed in the cause from tomcat-resources.xml.

The documentation for Configuring Relational Databases can be found docs.appian.com/.../Configuring_Relational_Databases.html.

The documentation doesn't recommend having the below in <APPIAN_HOME>/conf/tomcat-resources.xml

removeAbandoned="true"
removeAbandonedTimeout="30"
logAbandoned="true"

Affected Versions

This article applies to Appian 18.3 and later.
Last Reviewed : October 2019

Tags: Tomcat, connection pool, database, application server, timeout, infrastructure

[DRAFT] KB-XXXX Tomcat fails to start with "Connection has been abandoned" warning

Rebecca Jonas — Mon, 04 Nov 2019 19:50:45 GMT

Revision 7 posted to Appian Knowledge Base by Rebecca Jonas on 11/4/2019 7:50:45 PM

Symptoms

Tomcat is not able to start after changes have been made to <APPIAN_HOME>/conf/tomcat-resources.xml. The following error can be seen in the application server log:

WARNING [Tomcat JDBC Pool Cleaner[xxxxxxxxxx:xxxxxxxx]] org.apache.tomcat.jdbc.pool.ConnectionPool.abandon Connection has been abandoned PooledConnection[com.xxx.xxx.xxx.xxx]:java.lang.Exception

Cause

This issue occurs when <APPIAN_HOME>/conf/tomcat-resources.xml has the below properties set:

removeAbandoned="true"
removeAbandonedTimeout="30"
logAbandoned="true"

The error above occurs mainly due to the removeAbandonedTimeout value being present and the removeAbandoned value being set to "true"

Action

Set removeAbandoned ="false" or remove the properties listed in the cause from tomcat-resources.xml.

The documentation for Configuring Relational Databases can be found docs.appian.com/.../Configuring_Relational_Databases.html.

The documentation doesn't recommend having the below in <APPIAN_HOME>/conf/tomcat-resources.xml

removeAbandoned="true"
removeAbandonedTimeout="30"
logAbandoned="true"

Affected Versions

This article applies to Appian 18.3 and later.
Last Reviewed : October 2019

Tags: Tomcat, connection pool, database, application server, timeout, infrastructure

[DRAFT] KB-XXXX Tomcat fails to start with "Connection has been abandoned" warning

Rebecca Jonas — Mon, 04 Nov 2019 19:44:43 GMT

Revision 6 posted to Appian Knowledge Base by Rebecca Jonas on 11/4/2019 7:44:43 PM

Symptoms

Tomcat is not able to start after changes have been made to <APPIAN_HOME>/conf/tomcat-resources.xml. The following error can be seen in the application server log:

WARNING [Tomcat JDBC Pool Cleaner[xxxxxxxxxx:xxxxxxxx]] org.apache.tomcat.jdbc.pool.ConnectionPool.abandon Connection has been abandoned PooledConnection[com.xxx.xxx.xxx.xxx]:java.lang.Exception

Cause

This issue occurs when <APPIAN_HOME>/conf/tomcat-resources.xml has the below properties set:

removeAbandoned="true"
removeAbandonedTimeout="30"
logAbandoned="true"

The error above occurs mainly due to the removeAbandonedTimeout value being present and the removeAbandoned value being set to "true"

Action

Set removeAbandoned ="false" or remove the properties listed in the cause from tomcat-resources.xml.

The documentation for Configuring Relational Databases can be found docs.appian.com/.../Configuring_Relational_Databases.html.

The documentation doesn't recommend having the below in <APPIAN_HOME>/conf/tomcat-resources.xml

removeAbandoned="true"
removeAbandonedTimeout="30"
logAbandoned="true"

Affected Versions

This article applies to Appian 18.3 and later.
Last Reviewed : October 2019

Tags: Tomcat, connection pool, database, application server, timeout, infrastructure

[DRAFT] KB-XXXX Tomcat fails to start with 'Connection pool Abandon' warning

Saurabh Pisal — Wed, 30 Oct 2019 21:16:31 GMT

Revision 5 posted to Appian Knowledge Base by Saurabh Pisal on 10/30/2019 9:16:31 PM

Symptoms

Tomcat is not able to start after changes <APPIAN_HOME>/conf/tomcat-resources.xml The following error can be seen in the application server log:

WARNING [Tomcat JDBC Pool Cleaner[xxxxxxxxxx:xxxxxxxx]] org.apache.tomcat.jdbc.pool.ConnectionPool.abandon Connection has been abandoned PooledConnection[com.xxx.xxx.xxx.xxx]:java.lang.Exception

Cause

This issue occurs when <APPIAN_HOME>/conf/tomcat-resources.xml has the below property set. The error above occurs mainly due to removeAbandonedTimeout value present, and removeAbandoned is set to "true"

removeAbandoned="true"
removeAbandonedTimeout="30"
logAbandoned="true"

Action

Set removeAbandoned ="false"

Remove the above lines from cause from the file <APPIAN_HOME>/conf/tomcat-resources.xml

The documentation for Configuring Relational Databases can be found docs.appian.com/.../Configuring_Relational_Databases.html.

The documentation doesn't recommend having the below in <APPIAN_HOME>/conf/tomcat-resources.xml

removeAbandoned="true"
removeAbandonedTimeout="30"
logAbandoned="true"

Affected Versions

This article applies to Appian 18.3 and later.
Last Reviewed : October 2019

Tags: Tomcat, connection pool, database, application server, timeout, infrastructure

[DRAFT] KB-XXXX Tomcat Connection pool abandoned

Rebecca Jonas — Wed, 30 Oct 2019 20:42:27 GMT

Revision 4 posted to Appian Knowledge Base by Rebecca Jonas on 10/30/2019 8:42:27 PM

Symptoms

Tomcat is not able to start after a fresh install. The following error can be seen in the application server log:

WARNING [Tomcat JDBC Pool Cleaner[2074407503:1572289078027]] org.apache.tomcat.jdbc.pool.ConnectionPool.abandon Connection has been abandoned PooledConnection[com.ibm.db2.jcc.t4.b@2a7968cc]:java.lang.Exception

Cause

This issue occurs when <APPIAN_HOME>/conf/tomcat-resources.xml has the below property set

removeAbandoned="true"
removeAbandonedTimeout="30"
logAbandoned="true"

Action

Remove the above lines from cause from the file <APPIAN_HOME>/conf/tomcat-resources.xml

The documentation for Configuring Relational Databases can be found docs.appian.com/.../Configuring_Relational_Databases.html.

Affected Versions

This article applies to Appian 18.3 and later.

Tags: Tomcat, connection pool, database, application server, timeout, infrastructure

[DRAFT] KB-XXXX Tomcat Connection pool abandoned

Saurabh Pisal — Wed, 30 Oct 2019 17:45:43 GMT

Revision 3 posted to Appian Knowledge Base by Saurabh Pisal on 10/30/2019 5:45:43 PM

Symptoms

Tomcat is not able to start after a fresh install. The following error can be seen in the application server log:

WARNING [Tomcat JDBC Pool Cleaner[2074407503:1572289078027]] org.apache.tomcat.jdbc.pool.ConnectionPool.abandon Connection has been abandoned PooledConnection[com.ibm.db2.jcc.t4.b@2a7968cc]:java.lang.Exception

Cause

This issue occurs when <APPIAN_HOME>/conf/tomcat-resources.xml has the below property set

removeAbandoned="true"
removeAbandonedTimeout="30"
logAbandoned="true"

Action

Remove the above lines from cause from the file <APPIAN_HOME>/conf/tomcat-resources.xml

The documentation for Configuring Relational Databases can be found docs.appian.com/.../Configuring_Relational_Databases.html.

Affected Versions

This article applies to Appian 18.3 and later.

Tags: Tomcat, connection pool, database, application server, timeout, infrastructure

Tomcat Connection pool abandoned

Saurabh Pisal — Wed, 30 Oct 2019 17:22:38 GMT

Revision 2 posted to Appian Knowledge Base by Saurabh Pisal on 10/30/2019 5:22:38 PM

Symptoms

Tomcat is not able to start after a fresh install. The following error can be seen in the application server log:

WARNING [Tomcat JDBC Pool Cleaner[2074407503:1572289078027]] org.apache.tomcat.jdbc.pool.ConnectionPool.abandon Connection has been abandoned PooledConnection[com.ibm.db2.jcc.t4.b@2a7968cc]:java.lang.Exception

Cause

This issue occurs when <APPIAN_HOME>/conf/tomcat-resources.xml has the below property set

removeAbandoned="true"
removeAbandonedTimeout="30"
logAbandoned="true"

Action

Remove the above lines from cause from the file <APPIAN_HOME>/conf/tomcat-resources.xml

The documentation for Configuring Relational Databases can be found docs.appian.com/.../Configuring_Relational_Databases.html.

Affected Versions

This article applies to Appian 18.3 and later.

Tags: Tomcat, connection pool, database, application server, timeout, infrastructure

Error : Connection pool abandoned

Saurabh Pisal — Tue, 29 Oct 2019 22:03:01 GMT

Revision 1 posted to Appian Knowledge Base by Saurabh Pisal on 10/29/2019 10:03:01 PM

WARNING [Tomcat JDBC Pool Cleaner[2074407503:1572289078027]] org.apache.tomcat.jdbc.pool.ConnectionPool.abandon Connection has been abandoned PooledConnection[com.ibm.db2.jcc.t4.b@2a7968cc]:java.lang.Exception

Check for the below in tomcat-resources.xml

removeAbandoned="true"  -- was not required according to the documentatjion
removeAbandonedTimeout="30"
logAbandoned="true" -- should be fine if removeabandoned is true

The above should not be present in tomcat-resource.xml, some customers prefer to have a timeout according to their configuration but Appian doesn't recommend it in the documentation.

## To void above error

remove the above lines from tomcat-resource.xml

Tags: Tomcat, connection pool, database, application server, timeout, infrastructure