I have a java application, that seems to be stuck. I tried kill -3 but the output is empty (it is redirected to file but nothing is there).
what way can I see what it is doing?
EDIT:
I tried jstack but it crashed:
Linux # /usr/pkgs/java/1.6.0.25/bin/jstack -F -l 12666
Attaching to process ID 12666, please wait...
A fatal error has been detected by the Java Runtime Environment:
SIGSEGV (0xb) at pc=0xaf121777, pid=5423, tid=2937191328
JRE version: 6.0_25-b06
Java VM: Java HotSpot(TM) Server VM (20.0-b11 mixed mode linux-x86 )
Problematic frame:
C [libsaproc.so+0x1777] void+0x1777
...
EDIT2:
this is jvisualvm crash:
Linux # /usr/pkgs/java/1.6.0.25/bin/jvisualvm
A fatal error has been detected by the Java Runtime Environment:
SIGSEGV (0xb) at pc=0xf36d0777, pid=18217, tid=4090493856
JRE version: 6.0_25-b06
Java VM: Java HotSpot(TM) Client VM (20.0-b11 mixed mode, sharing linux-x86 )
Problematic frame:
C [libsaproc.so+0x1777] void+0x1777
An error report file with more information is saved as:
/tmp/root/feeder_wa/coho_idc/logs/hs_err_pid18217.log
If you would like to submit a bug report, please visit:
http://java.sun.com/webapps/bugreport/crash.jsp
The crash happened outside the Java Virtual Machine in native code.
See problematic frame for where to report the bug.
/usr/pkgs/java/1.6.0.25/bin/../lib/visualvm//platform/lib/nbexec: line 539: 18217 Aborted "/usr/pkgs/java/1.6.0.25/bin/java" -Djdk.home="/usr/pkgs/java/1.6.0.25" -classpath "/usr/pkgs/java/1.6.0.25/lib/visualvm/platform/lib/boot.jar:/usr/pkgs/java/1.6.0.25/lib/visualvm/platform/lib/org-openide-modules.jar:/usr/pkgs/java/1.6.0.25/lib/visualvm/platform/lib/org-openide-util-lookup.jar:/usr/pkgs/java/1.6.0.25/lib/visualvm/platform/lib/org-openide-util.jar:/usr/pkgs/java/1.6.0.25/lib/visualvm/platform/lib/locale/boot_ja.jar:/usr/pkgs/java/1.6.0.25/lib/visualvm/platform/lib/locale/boot_zh_CN.jar:/usr/pkgs/java/1.6.0.25/lib/visualvm/platform/lib/locale/org-openide-modules_ja.jar:/usr/pkgs/java/1.6.0.25/lib/visualvm/platform/lib/locale/org-openide-modules_zh_CN.jar:/usr/pkgs/java/1.6.0.25/lib/visualvm/platform/lib/locale/org-openide-util-lookup_ja.jar:/usr/pkgs/java/1.6.0.25/lib/visualvm/platform/lib/locale/org-openide-util-lookup_zh_CN.jar:/usr/pkgs/java/1.6.0.25/lib/visualvm/platform/lib/locale/org-openide-util_ja.jar:/usr/pkgs/java/1.6.0.25/lib/visualvm/platform/lib/locale/org-openide-util_zh_CN.jar:/usr/pkgs/java/1.6.0.25/lib/dt.jar:/usr/pkgs/java/1.6.0.25/lib/tools.jar" -Dnetbeans.dirs="/usr/pkgs/java/1.6.0.25/bin/../lib/visualvm//visualvm:/usr/pkgs/java/1.6.0.25/bin/../lib/visualvm//profiler:" -Dnetbeans.home="/usr/pkgs/java/1.6.0.25/lib/visualvm/platform" '-client' '-Xms24m' '-Xmx256m' '-Dsun.jvmstat.perdata.syncWaitMs=10000' '-Dsun.java2d.noddraw=true' '-Dsun.java2d.d3d=false' -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath="/root/.visualvm/6u23/var/log/heapdump.hprof" org.netbeans.Main --userdir "/root/.visualvm/6u23" "--branding" "visualvm" 0<&0
Try VisuamVM, you can find it in every JDK after version 6 at jdkInstallDir/bin/visualvm.