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Support Article

LogConfigurationException trying to use external jar method



Errors occurred during runtime when external JAR files included in Pega application were used by developers.

Error Messages

org.apache.commons.logging.LogConfigurationException: Class org.apache.commons.logging.impl.Jdk14Logger does not implement Log
at org.apache.commons.logging.impl.LogFactoryImpl.getLogConstructor(

Steps to Reproduce

  1. Upload JARs to a shared path on the file system.
  2. Configure the compiler/defaultPaths DSS.
  3. Restart the server with cache clean.

Root Cause

A defect or configuration issue in the operating environment:
JARs were present on the classpath ahead of the JARs provided in the database. This resulted in usage of the native JDK logging by one of these JARs instead of the logging JARs provided by PRPC.


Make the following change to the operating environment:
  1. Import the JAR files into the database using the Import Wizard. Import them into the Customer/06-01-01 codeset version provided by Pega or to an application-specific codeset version, for example mycodeset/01-01-01.
  2. If application-specific codeset version is used, add DSS (properties/com.pega.pegarules.bootstrap.codeset.version.mycodeset/default with value of 01-01-01) to include this codeset version to the system. The Customer/06-01-01 is automatically included with Pega.
  3. Remove the JAR files from the compiler default path DSS.
  4. Restart the system.

Published November 10, 2016 - Updated October 8, 2020

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