KB-1522 Excessive logging after upgrading to Appian 17.2 or above

Symptoms

After upgrading Appian to 17.2 or higher and applying a hotfix package, the following message shows up during the application server startup:

2018-02-03 14:54:52,352 ERROR [stderr] (MSC service thread 1-5) SLF4J: Class path contains multiple SLF4J bindings.
2018-02-03 14:54:52,353 ERROR [stderr] (MSC service thread 1-5) SLF4J: Found binding in [vfs:/apps/appian/ear/suite.ear/lib/slf4j-simple-1.7.21.jar/org/slf4j/impl/StaticLoggerBinder.class]
2018-02-03 14:54:52,353 ERROR [stderr] (MSC service thread 1-5) SLF4J: Found binding in [vfs:/apps/appian/ear/suite.ear/lib/slf4j-log4j12-1.7.0.jar/org/slf4j/impl/StaticLoggerBinder.class]
2018-02-03 14:54:52,353 ERROR [stderr] (MSC service thread 1-5) SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
2018-02-03 14:54:52,364 ERROR [stderr] (MSC service thread 1-5) SLF4J: Actual binding is of type [org.slf4j.impl.SimpleLoggerFactory]

After the application server has started successfully, logging messages such as these appear constantly in the application server log:

2018-02-03 14:57:56,453 ERROR [stderr] (Appian ReschedulingTimerTask - IaReplicatorTimerTask - 13) [Appian ReschedulingTimerTask - IaReplicatorTimerTask - 13] INFO feature_context - begin com.appiancorp.core.expr.Parse eval [Thread 238]
2018-02-03 14:57:56,454 ERROR [stderr] (Appian ReschedulingTimerTask - IaReplicatorTimerTask - 13) [Appian ReschedulingTimerTask - IaReplicatorTimerTask - 13] INFO feature_context - end com.appiancorp.core.expr.Parse eval:0ms [Thread 238]
2018-02-03 14:57:56,459 ERROR [stderr] (Appian ReschedulingTimerTask - IaReplicatorTimerTask - 13) [Appian ReschedulingTimerTask - IaReplicatorTimerTask - 13] INFO feature_context - begin com.appiancorp.core.expr.Parse eval [Thread 238]
2018-02-03 14:57:56,460 ERROR [stderr] (Appian ReschedulingTimerTask - IaReplicatorTimerTask - 13) [Appian ReschedulingTimerTask - IaReplicatorTimerTask - 13] INFO feature_context - end com.appiancorp.core.expr.Parse eval:0ms [Thread 238]

2018-02-03 15:00:47,265 ERROR [stderr] (Appian Plugin Hot Deploy) [Appian Plugin Hot Deploy] INFO com.atlassian.plugin.loaders.ScanningPluginLoader - No plugins found to be installed
2018-02-03 15:00:47,269 ERROR [stderr] (Appian Plugin Hot Deploy) [Appian Plugin Hot Deploy] INFO com.atlassian.plugin.loaders.ScanningPluginLoader - No plugins found to be installed

Cause

This issue has been addressed as AN-99391 in the following hotfixes/versions:

• Appian 17.3 Hotfix Package E
• Appian 17.4 Hotfix Package D
• Appian 18.1

Action

Apply the latest hotfix to your Appian installation or upgrade to the latest version of Appian. For Appian 17.2, this issue can be alleviated by using the below workaround.

Workaround

The issue can be alleviated by following these steps:

1. Shut down the application server.
2. Delete slf4j-simple-1.7.21.jar from <APPIAN_HOME>/ear/suite.ear/lib.
3. Clear the application server cache.
   1. Directions for JBoss
   2. Directions for WebLogic
4. If using WebLogic, redeploy the suite EAR to WebLogic.
5. Start the application server.

Affected Versions

This article applies to Appian versions 17.2 through 17.4.

Last reviewed: March 2018