Doesn't work on IBM Java: ATTACH_ERR AgentInitializationException102

[candrews]

I'm trying to attach to a running process; this works great on the Sun/Oracle/Open JDK, but I can't get it to work on the IBM JDK.

root@ibmserver:/apps/IBM/WebSphere/AppServer/java/bin>java -jar /root/file-leak-detector-1.7-jar-with-dependencies.jar 5177488 http=19999
Connecting to 5177488
Activating file leak detector at /home/achinich/file-leak-detector-1.7-jar-with-dependencies.jar
Exception in thread "main" java.lang.reflect.InvocationTargetException
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:60)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:37)
        at java.lang.reflect.Method.invoke(Method.java:611)
        at org.kohsuke.file_leak_detector.Main.run(Main.java:56)
        at org.kohsuke.file_leak_detector.Main.main(Main.java:35)
Caused by: com.sun.tools.attach.AgentInitializationException: ATTACH_ERR AgentInitializationException102
        at ibm.tools.attach.J9VirtualMachine.loadAgent(J9VirtualMachine.java:66)
        ... 6 more

[e2bady]

I don't think it's an IBM JDK problem. I'm running OpenJDK Runtime Environment (IcedTea 2.4.4) and I have the same problem:

root@workstation:/home/bady# java -jar file-leak-detector-1.7-jar-with-dependencies.jar 3734 http=19999
Connecting to 3734
Exception in thread "main" java.lang.reflect.InvocationTargetException
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.kohsuke.file_leak_detector.Main.run(Main.java:50)
    at org.kohsuke.file_leak_detector.Main.main(Main.java:35)
Caused by: com.sun.tools.attach.AttachNotSupportedException: Unable to open socket file: target process not responding or HotSpot VM not loaded
    at sun.tools.attach.LinuxVirtualMachine.<init>(LinuxVirtualMachine.java:106)
    at sun.tools.attach.LinuxAttachProvider.attachVirtualMachine(LinuxAttachProvider.java:63)
    at com.sun.tools.attach.VirtualMachine.attach(VirtualMachine.java:213)
    ... 6 more

Here is the hole Console output:

root@workstation:/home/bady# ps aux | grep java
tomcat7   3734  5.4 52.8 2790824 817408 ?      Sl   13:41   2:24 /usr/lib/jvm/java-7-openjdk-i386/bin/java -Djava.util.logging.config.file=/var/lib/tomcat7/conf/logging.properties -server -Xmx2048m -Xms1024m -Xmn512m -XX:-OmitStackTraceInFastThrow -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djava.endorsed.dirs=/usr/share/tomcat7/endorsed -classpath /usr/share/tomcat7/bin/bootstrap.jar:/usr/share/tomcat7/bin/tomcat-juli.jar -Dcatalina.base=/var/lib/tomcat7 -Dcatalina.home=/usr/share/tomcat7 -Djava.io.tmpdir=/tmp/tomcat7-tomcat7-tmp org.apache.catalina.startup.Bootstrap start
root      4989  0.0  0.0   4412   808 pts/1    S+   14:25   0:00 grep --color=auto java
root@workstation:/home/bady# java -version
java version "1.7.0_51"
OpenJDK Runtime Environment (IcedTea 2.4.4) (7u51-2.4.4-0ubuntu0.12.10.2)
OpenJDK Client VM (build 24.45-b08, mixed mode, sharing)
root@workstation:/home/bady# java -jar file-leak-detector-1.7-jar-with-dependencies.jar 3734 http=19999
Connecting to 3734
Exception in thread "main" java.lang.reflect.InvocationTargetException
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.kohsuke.file_leak_detector.Main.run(Main.java:50)
    at org.kohsuke.file_leak_detector.Main.main(Main.java:35)
Caused by: com.sun.tools.attach.AttachNotSupportedException: Unable to open socket file: target process not responding or HotSpot VM not loaded
    at sun.tools.attach.LinuxVirtualMachine.<init>(LinuxVirtualMachine.java:106)
    at sun.tools.attach.LinuxAttachProvider.attachVirtualMachine(LinuxAttachProvider.java:63)
    at com.sun.tools.attach.VirtualMachine.attach(VirtualMachine.java:213)
    ... 6 more
root@workstation:/home/bady# 

[christ66]

I believe in order for you to attach to the JVM you would need to run the command as the same user that's running the java process. You are running the command as root, but the process is ran by user tomcat7, so this would error. You can get this error also if you perform a jstack command as a different user from the one running the jvm. The only way around it would be to run jstack -F which will force attaching to the jvm process.

[zrlw]

Java Virtual Machine of the WebSphere Application Server should set to debug mode. file-leak-detector for WebSphere Application Server 8.5 (IBM JDK 1.6) https://github.com/zrlw/file-leak-detector