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To: tryandbuy via Cygwin <cygwin AT cygwin DOT com>
Subject: Fork errors
Thread-Topic: Fork errors
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Date: Wed, 6 Sep 2023 18:51:39 +0000
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From: Dale Lobb via Cygwin <cygwin AT cygwin DOT com>
Reply-To: Dale Lobb <Dale DOT Lobb AT bryanhealth DOT org>
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Sender: "Cygwin" <cygwin-bounces+archive-cygwin=delorie DOT com AT cygwin DOT com>

  Since upgrading to the latest version of Cygwin a few weeks ago on a server I manage, I've been experiencing an issue with fork errors.  The Cygwin installation had not been updated for almost a year before that.

  The issue happens every time a script is invoked that purges files from some temporary directories, but never in the same place in the script.  The script uses multiple calls to find -exec to remove files over 10 days old from the directories.  Here is a typical error.  Sometime the issue will assert after just a  few tens of files deleted, sometimes after hundreds or thousands of files have been deleted:

    removed '/cygdrive/d/.../obfuscated.datedata.txt'
          1 [main] find 20066 dofork: child -1 - forked process 4068 died unexpectedly, retry 0, exit code 0xC0000142, errno 11
          find: cannot fork: Resource temporarily unavailable

  It also happens randomly at other times.  I've seen the bash shell itself fail on the invocation of a mintty.  I've seen it happen on all sorts of interactive commands entered from bash.

  Today, as a test, I updated all the installed Cygwin components.  One of the post installation scripts failed, so I re-exec'd it:

    $ ./postinstall/0p_update-info-dir.dash
    Rebuilding info directory
        2 [main] dash 2059 dofork: child -1 - forked process 7676 died unexpectedly, retry 0, exit code 0xC0000142, errno 11
        ./postinstall/0p_update-info-dir.dash: 22: Cannot fork

  A second re-exec then worked fine.

  I've tried reinstalling all the components, and I've tried rebaseall.

  Is there anything else I can try, or troubleshooting steps to take?

Best Regards,

Dale


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