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Support Article

Unable to Start Node, NoClassDefFoundError



After installing application RAP files, administrators became unable to start server as a NoClassDefFoundError is thrown.

Error Messages

<Dec 13, 2016 10:58:56 PM PST> <Error> <com.pega.pegarules.internal.bootstrap.PRBootstrap> <BEA-000000> <Problem during method invocation (saveInOwnTransaction)
java.lang.NoClassDefFoundError: com/pega/apache/log4j/spi/ThrowableInformation

Steps to Reproduce

Start Node

Root Cause

A defect or configuration issue in the operating environment. This may be caused by an intermittent problem reading from the database during exception processing


Perform the following local-change: Add the following setting to prconfig.xml to pre-load the offending class:

<env name="initialization/preloadengineclasses" value="com.pega.apache.log4j.spi.ThrowableInformation" /> 

Published January 3, 2017 - Updated October 8, 2020

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