Troubleshooting: icu4j classes log error after upgrading WebSphere Application Server
Upgrading to WebSphere Application Server 8.5.5.18 or greater cause icu4j classes to log errors.
Problem
After upgrading to WebSphere Application Server 8.5.5.18 or greater, an error similar to
the following
appears:
Caused by: java.lang.IllegalArgumentException: Invalid version number: Version number may be negative or greater than 255
at com.ibm.icu.util.VersionInfo.getInstance(VersionInfo.java:188)
at com.ibm.icu.impl.ICUDebug.getInstanceLenient(ICUDebug.java:65)
at com.ibm.icu.impl.ICUDebug.<clinit>(ICUDebug.java:69) ... 40 more
Solution
Downgrade to WebSphere Application Server 8.5.5.17 or below.