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Exception while processing application and agent failure



User reported that agent failed with error 'java.lang.NoClassDefFoundError: com/pega/apache/log4j/spi/ThrowableInformation'.

Error Messages

Exception at 20151217T053412.907 GMT: java.lang.NoClassDefFoundError: com/pega/apache/log4j/spi/ThrowableInformation 
at com.pega.apache.log4j.spi.LoggingEvent.<init>( 
at com.pega.apache.log4j.Category.forcedLog( 
at com.pega.apache.log4j.Category.error( 
at com.pega.pegarules.priv.LogHelper.error( 
at com.pegarules.generated.activity.ra_action_processexternalfeeds_f6593ab9f5a4dd7b1856704283c0a4e9.step4_3_circum0( 
at com.pegarules.generated.activity.ra_action_processexternalfeeds_f6593ab9f5a4dd7b1856704283c0a4e9.step4_0_circum0_AEXP_FW_Ent_Int_SQL_GNA_ACQ_APP_UPD_DTL( 
at com.pegarules.generated.activity.ra_action_processexternalfeeds_f6593ab9f5a4dd7b1856704283c0a4e9.perform( 
at com.pega.pegarules.session.internal.mgmt.Executable.doActivity( 
at com.pega.pegarules.session.internal.async.agent.QueueProcessor.runActivity( 
at com.pega.pegarules.session.internal.async.agent.QueueProcessor.execute( 
at com.pega.pegarules.session.internal.PRSessionProviderImpl.performTargetActionWithLock( 

Steps to Reproduce

Not Applicable.

Root Cause

A defect or configuration issue in the operating environment. During this time noticed there were some transaction related error which caused all the database operations fail, hence above error.


Here’s the explanation for the reported behavior:

Below prconfig.xml or DSS setting help to preload the engine classes, but does not address the underlying problem. ThrowableInformation and StackTrace are common classes to preload.

prconfig.xml setting:

prconfig.xml setting: initialization/preloadengineclasses
Value: com.pega.pegarules.priv.util.StackTrace com.pega.apache.log4j.spi.ThrowableInformation
Note: Classes are separated by space.

DSS setting:

To set via DSS - refer
Ruleset:  Pega-Engine
Purpose: prconfig/initialization/preloadengineclasses/default
Value: com.pega.pegarules.priv.util.StackTrace com.pega.apache.log4j.spi.ThrowableInformation

Published January 31, 2016 - Updated October 8, 2020

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