We are detecting an issue when we try to restart our JVM which contains an agent in its configuration (java arguments).
We have a WebSphere 8.5 JVM and we can see in the logs the following message:
4/26/22 05:28:48 PM IST [ERROR] [IntroscopeAgent.Agent] Unexpected error loading extension
java.lang.NoClassDefFoundError: Could not initialize class sun.security.util.SignatureFileVerifier
Release : 10.7.0
Component :
/opt/WebSphere8.5/AppServer/java_1.7_32/jre/lib/rt.jar: error reading zip file
/26/22 04:25:07 PM IST [ERROR] [IntroscopeAgent.Agent] Unexpected error loading extension
ava.lang.NoClassDefFoundError: Could not initialize class sun.security.util.SignatureFileVerifier
at java.util.jar.JarFile.initializeVerifier(JarFile.java:334)
Problem was due to corrupt Java installation - copying the Java install from a working server resolved the problem
33098954