Java heap dump error with jmap command : Premature EOF

Question

I have encountered below exception during execution of below command

jmap -dump:format=b,file=heap_dump.bin 

output:

Answer 1

Brian's comment is helpful to resolve the issue.

If you are using G1GC algorithm in 64 bit machine:

Below command does not work ( excluding live option)

jmap -J-d64 -dump:format=b,file=<heap_dump_filename> <pid>

you have to use below option to get the heap dump

jmap -J-d64 -dump:live,format=b,file=<heap_dump_filename> <PID>

There are some suggestions to use -F option to force heap dump but as per oracle technotes:

-F Force. Use with jmap -dump or jmap -histo option if the pid does not respond. The live suboption is not supported in this mode.

Since heap dump is required with G1GC option, above option can't be used.