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  1. JBoss Enterprise Application Platform
  2. JBEAP-17879

(7.2.z) '-Xlog:gc' option is not supported on OpenJDK11 + OpenJ9

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      1. start server with OpenJDK11 + OpenJ9 JDK: 
        JAVA_HOME=<PATH_TO_OPENJDK11+OPENJ9/ ./bin/standalone.sh
      2. see the JVM warning: 
        JVMJ9VM085W Malformed option: '-Xlog:gc*:file=<JBOSS_HOME_PATH>/standalone/log/gc.log:time'
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      start server with OpenJDK11 + OpenJ9 JDK: JAVA_HOME=<PATH_TO_OPENJDK11+OPENJ9/ ./bin/standalone.sh see the JVM warning: JVMJ9VM085W Malformed option: '-Xlog:gc*:file=<JBOSS_HOME_PATH>/standalone/log/gc.log:time'

    Description

      With OpenJDK11 + OpenJ9, I can see following error during the server bootup:

      JVMJ9VM085W Malformed option: '-Xlog:gc*:file=<JBOSS_HOME_PATH>/standalone/log/gc.log:time'

      Based on the discussion here, the -Xlog:gc option is not supported in this JDK and it won't be.

      Relevant part of the startup script for standalone.sh in upstream WildFly.

      This warning occurs only on OpenJDK11 + OpenJ9. This does not show up when using OpenJDK8 + OpenJ9 as different branch in script is used in that case (-verbose:gc -Xloggc:\"$JBOSS_LOG_DIR/gc.log\" -XX:+PrintGCDetails -XX:+PrintGCDateStamps -XX:+UseGCLogFileRotation -XX:NumberOfGCLogFiles=5 -XX:GCLogFileSize=3M -XX:-TraceClassUnloading).

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          Epic - Created by Jira Software - do not edit or delete. Issue type for a big user story that needs to be broken down. JBEAP-18095 Provide an EAP Openshift image for IBM Z series

          • Major - To be worked after higher priority work items are addressed. When the severity is high and the effort to change it is low to moderate, this term is chosen. Issues in this category likely have an existing workaround but implementation or execution may be non-trivial.
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          Bug - A problem which impairs or prevents the functions of the product. JBEAP-17656 (7.3.z) '-Xlog:gc' option is not supported on OpenJDK11 + OpenJ9

          • Blocker - To be worked above all other priorities. This term is chosen when the severity of the issue is very high, has no workaround, or the effort for the change is comparatively low. Issues that may be very publicly visible and could generate significant media attention may also drive a higher priority.
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                jperkins-rhn James Perkins
                jstourac@redhat.com Jan Stourac
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