I have an taken a core dump file from a machine, with file size 2GB. I can open this file with gdb and see the processes that were running when I took the core file. I want though to convert this file into a heap dump in order to see more useful information. I tried running the below commands without any success. Does anyone have an idea why the file is not converted into heap dump? How can I perform this action?

I tried the bellow commands but I get errors and the file never is being created.

jmap -heap:format=b file=jvmcore.hprof /usr/lib/jvm/jdk1.5.0_22/ jvm.core Usage: jmap \[option\] \<pid\> (to connect to a live java process) or jmap \[option\] \<executable\> \<core\> (to connect to a core file) or jmap \[option\] \[server_id@\]\<remote server IP or hostname\> (to connect to a remote debug server) where option must be one of: \<no option\> to print same info as Solaris pmap \-heap to print java heap summary \-heap:format=b to dump java heap in hprof binary format \-histo to print histogram of java object heap \-permstat to print permanent generation statistics \-h | -help to print this help message

Same result as above i got with the following command:

jmap -heap:format=b file=jvmcore.hprof /usr/lib/jvm/jdk1.5.0_11/ jvm.core

And trying this command gets an error:

jmap -heap:format=b file=jvmcore.hprof jvm.core Attaching to core jvm.core from executable file=jvmcore.hprof, please wait... Error attaching to core file: Can't attach to the core file