DEBUG logging for java.io.serialization cannot be enabled in EAP 7

Environment

• JBoss Enterprise Application Platform (EAP)
  • 7.x

Issue

• In a standalone application or deployed to Tomcat, we can enable logging for java.io.serialization and see output as expected from the java.io.ObjectInputStream class as below. But we cannot see any such logs with equivalent java.io.serializationlog settings on EAP:

java.io.ObjectInputStream filterCheck
FINE: ObjectInputFilter REJECTED: class foobar, array length: -1, nRefs: 1, depth: 1, bytes: 77, ex: n/a

Resolution

• Update to EAP 7.4.13+ or 8.0.2+

Root Cause

• When "java.base" module code, like the ObjectInputStream class, calls System.getLogger(), a "system logger" is created and its' configuration is merged with our configured jboss-logging logger instance via Logger.mergeWithSystemLogger(sysLogger). During this merging operation the handlers are not transferred from our configured logger instance, so the system logger ends up with no handlers and so no DEBUG enabled for "java.io.serialization".
• This content is not included.MODULES-439
• This content is not included.JBEAP-25270
• This content is not included.JBEAP-25284

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