Convert .dmp file to .hprof file

Question

I have tried running the command

jmap -dump:format=b,file=jvm.hprof core.20170103.212745.20453.0007.dmp

But i get an error

Error attaching to remote server: java.rmi.UnknownHostException: Unknown host: core.20170103.212745.20453.0007.dmp; nested exception is:
    java.net.UnknownHostException: core.20170103.212745.20453.0007.dmp
sun.jvm.hotspot.debugger.DebuggerException: java.rmi.UnknownHostException:     

What is the error? I tried putting it on a TomCat server and running it but still throws an error

Answer 1

You are missing the "executable" parameter, so jmap thinks you're trying to connect to a remote host. try something like:

jmap -dump:format=b,file=jvm.hprof /usr/bin/java core.20170103.212745.20453.0007.dmp