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Groups > comp.lang.java.programmer > #39731

what thread or module is listening on a port?

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Given a java process (that uses a couple of 3rd-party libs and stuff from
maven repo) and a TCP port number that this process is listening on (for all
interfaces), what options do I have for finding out, which "part" of the
process is responsible for the listening port?

Once I see, which of the umpty libraries did it, I can look for options
to either unconfigure it, bind to localhost, or at least understand it.

That's on Solaris (Unix).
$ netstat -aun | grep "54157.*LISTEN"     # gives me e.g:
      *.52634              *.*            xxx  54157 java 0      0  256000      0 LISTEN

The portnumber is in the >32k range and changes with each restart
of the process, thus apparently isn't itself configured.

When I telnet to the port, the connection is dropped after writing any 6
bytes to it. - maybe that rings a bell for some type of common service?

PS: Java here is Azul's "Zulu", openjdk version 1.8.0_252
     (in case it matters for further diagnostic tools available)

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Thread

what thread or module is listening on a port? Andreas Leitgeb <avl@logic.at> - 2022-02-23 12:37 +0000
  Re: what thread or module is listening on a port? Eric Sosman <esosman@comcast-dot-net.invalid> - 2022-02-23 10:51 -0500
    Re: what thread or module is listening on a port? Martin Gregorie <martin@mydomain.invalid> - 2022-02-23 16:51 +0000
  Re: what thread or module is listening on a port? Arne Vajhøj <arne@vajhoej.dk> - 2022-02-23 12:15 -0500
    Re: what thread or module is listening on a port? Andreas Leitgeb <avl@logic.at> - 2022-02-24 23:04 +0000
    Re: what thread or module is listening on a port? Daniele Futtorovic <da.futt.news@laposte-dot-net.invalid> - 2022-03-19 12:47 +0100

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