Skip to main content

This content has been archived and is no longer being updated. Links may not function; however, this content may be relevant to outdated versions of the product.

Support Article

NoClassDefFoundError on connecting to a Pega hosted SOAP service



External application cannot access a Pega-hosted SOAP service.

Error Messages

Caused by: 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(


Steps to Reproduce


Root Cause

A defect or configuration issue in the operating environment.  The needed class is sporadically unable to load from the database.


Perform the following local-change: 

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

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

Published January 31, 2016 - Updated October 8, 2020

Was this useful?

0% found this useful

Have a question? Get answers now.

Visit the Collaboration Center to ask questions, engage in discussions, share ideas, and help others.

Did you find this content helpful?

Want to help us improve this content?

We'd prefer it if you saw us at our best.

Pega Community has detected you are using a browser which may prevent you from experiencing the site as intended. To improve your experience, please update your browser.

Close Deprecation Notice
Contact us