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Eclipse OpenJ9: A Java Virtual Machine for OpenJDK that's optimized for small footprint, fast start-up, and high throughput. Builds on Eclipse OMR (https://github.com/eclipse/omr) and combines with the Extensions for OpenJDK for OpenJ9 repo.
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WebSphere Liberty Code Dump Generated while running application with java instrumentation agent #9639

Open vishals9 opened 4 years ago

vishals9 commented 4 years ago

Java -version output

java version "1.8.0_221" Java(TM) SE Runtime Environment (build 8.0.5.40 - pxa6480sr5fp40-20190807_01(SR5 FP40)) IBM J9 VM (build 2.9, JRE 1.8.0 Linux amd64-64-Bit Compressed References 20190802_424001 (JIT enabled, AOT enabled) OpenJ9 - 106f6ce OMR - fe07f6f IBM - af2a365) JCL - 20190712_01 based on Oracle jdk8u221-b11 Output from java -version. If the shas are not public, include equivalent public shas.

Summary of problem

Java Agent is not instrumenting methods starting with package "com.ibm.ws". But still getting javacore when server compiling below method:

2XHREGISTER CR2: 0000000000000000 1XHEXCPMODULE Compiling method: com/ibm/ws/security/jaspi/JaspiServletFilter.doFilter(Ljavax/servlet/ServletRequest;Ljavax/servlet/ServletResponse;Ljavax/servlet/FilterChain;)V NULL But when we exclude these methods using -Xjit:exclude={...} then not getting javacore as given in example below-

1CICMDLINE /opt/IBM/InstallationManager/eclipse/jre_8.0.5040.20190923_1526/jre/bin/java -javaagent:/opt/IBM/WebSphere/Liberty/bin/tools/ws-javaagent.jar -Djava.awt.headless=true -Djdk.attach.allowAttachSelf=true -Xmx2048m -Xms1024m -Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.authenticate=false -Dcom.sun.management.jmxremote.ssl=false -Dcom.sun.management.jmxremote.port=9000 -Djava.rmi.server.hostname=x.x.x.x -Xjit:exclude={com/ibm/ws/*} -javaagent:/home/cavisson/netdiagnostics/lib/ndmain.jar=time,ndAgentJar=/home/cavisson/netdiagnostics/lib/ndagent-with-dep.jar,ndHome=/home/cavisson/netdiagnostics,logInstrCode=1 -Dorg.osgi.framework.bootdelegation=com.cavisson.ndutils -jar /opt/IBM/WebSphere/Liberty/bin/tools/ws-server.jar defaultServer

Diagnostic files

javacore.20200513.062109.7140.0002.txt

DanHeidinga commented 4 years ago

Crash in the JIT while inlining. Likely a null dereference?

1XHEXCPMODULE  Compiling method: com/ibm/ws/security/jaspi/JaspiServletFilter.doFilter(Ljavax/servlet/ServletRequest;Ljavax/servlet/ServletResponse;Ljavax/servlet/FilterChain;)V
NULL           
1XHFLAGS       VM flags:00000000000501FF
# java -Xjit:vmstate=0x00000501FF
vmState [0x501ff]: {J9VMSTATE_JIT_CODEGEN} {inlining}
andrewcraik commented 4 years ago

@cathyzhyi can you have a sniff.

cathyzhyi commented 4 years ago

@vishals9 Could you try to reproduce and get a tracing log with Java option '-Xjit:{com/ibm/ws/security/jaspi/JaspiServletFilter.doFilter(Ljavax/servlet/ServletRequest;Ljavax/servlet/ServletResponse;Ljavax/servlet/FilterChain;)V}(log=log,tracefull,traceinlining,debuginliner)' ?