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This content has been archived and is no longer being updated. Links may not function; however, this content may be relevant to outdated versions of the product.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



NoClassDefFoundError occurs when data pages sourced form REST connections are run. However, they work in other environments with the same rules and the end points are reachable through other systems.

Error Messages

Caused by: java.lang.NoClassDefFoundError: org/apache/commons/logging/LogFactory
at org.apache.http.conn.ssl.DefaultHostnameVerifier.<init>( ~[httpclient-4.5.2.jar:?]
at org.apache.http.conn.ssl.DefaultHostnameVerifier.<init>( ~[httpclient-4.5.2.jar:?]
at ~[printegrint.jar:?]
at ~[printegrint.jar:?]
at ~[printegrint.jar:?]
at ~[printegrint.jar:?]
at ~[printegrint.jar:?]

Steps to Reproduce

Run a data page which is sourced from a REST connection.

Root Cause

A defect or configuration issue in the operating environment. A class conflict was created when a jar file was imported using the Import Wizard. This was found by navigating to SMA > Advanced > ETier Runtime Environment and looking up the mentioned class: org.apache.commons.logging.LogFactory.

A working system retrieved this class from pegajdbc://481445514:0/commons-logging-1.2.jar. However, the system on which the error occurred, referenced a different jar file that is not provided out-of-the-box.


Perform the following local-change:

Delete the imported jar from the database using the following query:

delete from <your_rules_schema>.pr_engineclasses where pzjar = 'your_jar';

Suggest Edit

Published April 26, 2018 - Updated December 2, 2021

Did you find this content helpful? Yes No

Have a question? Get answers now.

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

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