DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org 64C643857C5B
Date: Thu, 30 Sep 2021 17:22:25 +0000 (UTC)
To: "cygwin AT cygwin DOT com" <cygwin AT cygwin DOT com>
Message-ID: <764795149.682120.1633022545890@mail.yahoo.com>
Subject: Hanging cygwin processes in Windows Server 2019
MIME-Version: 1.0
References: <764795149 DOT 682120 DOT 1633022545890 DOT ref AT mail DOT yahoo DOT com>
From: "chris.hardison--- via Cygwin" <cygwin AT cygwin DOT com>
Reply-To: "chris DOT hardison AT yahoo DOT com" <chris DOT hardison AT yahoo DOT com>
Content-Type: text/plain; charset="utf-8"
Sender: "Cygwin" <cygwin-bounces+archive-cygwin=delorie DOT com AT cygwin DOT com>
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My cygwin install looks good and things seem to work perfectly for some time (hours or days), then a cygwin process started by a windows process that is usually a child process of a windows service written in perl will hang and then most all other cygwin processes will hang or take a very long time to return.  The simplest example is a call to \cygwin\bin\ps from powershell. That normally returns with sub-second response time.  Once the problem occurs that call to \cygwin\bin\ps will often take several minutes to return.  I've found that killing all cygwin processes will temporarily resolve the problem.
I've read about redirecting NUL to stdin when making the call to cygwin processes from windows and that didn't seem to help.
I've tried "set-processmitigation -name \cygwin\bin\ps.exe -disable ForceRelocateImages" with no real benefit.
I've also tried "\cygwin\bin\dash -c /bin/rebaseall" on startup before the sshd service starts and that didn't seem to help.
Any suggestions on how to prevent this problem will be greatly appreciated.
Thanks!chris


$ cygcheck -v /usr/bin/perl
C:\Windows\Cygwin\bin\perl.exe - os=4.0 img=1.0 sys=4.0
  "perl.exe" v0.0 ts=2021-02-06 11:46
  C:\Windows\Cygwin\bin\cygperl5_32.dll - os=4.0 img=1.0 sys=4.0
    "cygperl5_32.dll" v0.0 ts=2021-02-06 11:44
    C:\Windows\Cygwin\bin\cygcrypt-2.dll - os=4.0 img=1.0 sys=4.0
      "cygcrypt-2.dll" v0.0 ts=2021-05-20 09:20
      C:\Windows\Cygwin\bin\cygwin1.dll - os=4.0 img=1.0 sys=4.0
        "cygwin1.dll" v0.0 ts=2021-03-29 09:37
        C:\Windows\system32\KERNEL32.dll - os=10.0 img=10.0 sys=10.0
          "KERNEL32.dll" v0.0
          C:\Windows\system32\ntdll.dll - os=10.0 img=10.0 sys=10.0
            "ntdll.dll" v0.0 ts=2010-05-08 14:49
          C:\Windows\system32\KERNELBASE.dll - os=10.0 img=10.0 sys=10.0
            "KERNELBASE.dll" v0.0 ts=1979-12-01 09:56
            C:\Windows\system32\ntdll.dll (already done)
        C:\Windows\system32\ntdll.dll (already done)
      C:\Windows\Cygwin\bin\cyggcc_s-1.dll - os=4.0 img=1.0 sys=4.0
        "cyggcc_s-1.dll" v0.0 ts=2020-09-12 12:49
        C:\Windows\Cygwin\bin\cygwin1.dll (already done)
        C:\Windows\system32\KERNEL32.dll (already done)
      C:\Windows\system32\KERNEL32.dll (already done)
    C:\Windows\Cygwin\bin\cygwin1.dll (already done)
    C:\Windows\Cygwin\bin\cyggcc_s-1.dll (already done)
    C:\Windows\system32\KERNEL32.dll (already done)
  C:\Windows\Cygwin\bin\cygwin1.dll (already done)
  C:\Windows\system32\KERNEL32.dll (already done)

$ cygcheck -v /usr/bin/ps
C:\Windows\Cygwin\bin\ps.exe - os=4.0 img=1.0 sys=4.0
  C:\Windows\Cygwin\bin\cygwin1.dll - os=4.0 img=1.0 sys=4.0
    "cygwin1.dll" v0.0 ts=2021-03-29 09:37
    C:\Windows\system32\KERNEL32.dll - os=10.0 img=10.0 sys=10.0
      "KERNEL32.dll" v0.0
      C:\Windows\system32\ntdll.dll - os=10.0 img=10.0 sys=10.0
        "ntdll.dll" v0.0 ts=2010-05-08 14:49
      C:\Windows\system32\KERNELBASE.dll - os=10.0 img=10.0 sys=10.0
        "KERNELBASE.dll" v0.0 ts=1979-12-01 09:56
        C:\Windows\system32\ntdll.dll (already done)
    C:\Windows\system32\ntdll.dll (already done)
  C:\Windows\system32\ADVAPI32.dll - os=10.0 img=10.0 sys=10.0
    "ADVAPI32.dll" v0.0
    C:\Windows\system32\msvcrt.dll - os=10.0 img=10.0 sys=10.0
      "msvcrt.dll" v0.0
      C:\Windows\system32\ntdll.dll (already done)
      C:\Windows\system32\KERNELBASE.dll (already done)
    C:\Windows\system32\ntdll.dll (already done)
    C:\Windows\system32\KERNELBASE.dll (already done)
    C:\Windows\system32\SECHOST.dll - os=10.0 img=10.0 sys=10.0
      "SECHOST.dll" v0.0
      C:\Windows\system32\ntdll.dll (already done)
      C:\Windows\system32\RPCRT4.dll - os=10.0 img=10.0 sys=10.0
        "RPCRT4.dll" v0.0
        C:\Windows\system32\ntdll.dll (already done)
        C:\Windows\system32\SspiCli.dll - os=10.0 img=10.0 sys=10.0
          "SspiCli.dll" v0.0 ts=2036-05-08 21:49
          C:\Windows\system32\ntdll.dll (already done)
          C:\Windows\system32\RPCRT4.dll (recursive)
          C:\Windows\system32\CRYPTBASE.dll - os=10.0 img=10.0 sys=10.0
            "CRYPTBASE.dll" v0.0
            C:\Windows\system32\ntdll.dll (already done)
            C:\Windows\system32\bcryptPrimitives.dll - os=10.0 img=10.0 sys=10.0
              "bcryptPrimitives.dll" v0.0
              C:\Windows\system32\ntdll.dll (already done)
        C:\Windows\system32\KERNELBASE.dll (already done)
    C:\Windows\system32\KERNEL32.dll (already done)
    C:\Windows\system32\RPCRT4.dll (already done)
  C:\Windows\system32\KERNEL32.dll (already done)
  C:\Windows\system32\ntdll.dll (already done)

$ cygcheck -v /usr/bin/ssh
C:\Windows\Cygwin\bin\ssh.exe - os=4.0 img=1.0 sys=4.0
  C:\Windows\Cygwin\bin\cygcrypto-1.1.dll - os=4.0 img=1.0 sys=4.0
    "cygcrypto-1.1.dll" v0.0 ts=2020-04-08 19:02
    C:\Windows\Cygwin\bin\cygwin1.dll - os=4.0 img=1.0 sys=4.0
      "cygwin1.dll" v0.0 ts=2021-03-29 09:37
      C:\Windows\system32\KERNEL32.dll - os=10.0 img=10.0 sys=10.0
        "KERNEL32.dll" v0.0
        C:\Windows\system32\ntdll.dll - os=10.0 img=10.0 sys=10.0
          "ntdll.dll" v0.0 ts=2010-05-08 14:49
        C:\Windows\system32\KERNELBASE.dll - os=10.0 img=10.0 sys=10.0
          "KERNELBASE.dll" v0.0 ts=1979-12-01 09:56
          C:\Windows\system32\ntdll.dll (already done)
      C:\Windows\system32\ntdll.dll (already done)
    C:\Windows\Cygwin\bin\cygz.dll - os=4.0 img=1.0 sys=4.0
      "cygz.dll" v0.0 ts=2017-03-03 21:51
      C:\Windows\Cygwin\bin\cygwin1.dll (already done)
      C:\Windows\Cygwin\bin\cyggcc_s-1.dll - os=4.0 img=1.0 sys=4.0
        "cyggcc_s-1.dll" v0.0 ts=2020-09-12 12:49
        C:\Windows\Cygwin\bin\cygwin1.dll (already done)
        C:\Windows\system32\KERNEL32.dll (already done)
      C:\Windows\system32\KERNEL32.dll (already done)
    C:\Windows\Cygwin\bin\cyggcc_s-1.dll (already done)
    C:\Windows\system32\KERNEL32.dll (already done)
  C:\Windows\Cygwin\bin\cygwin1.dll (already done)
  C:\Windows\Cygwin\bin\cyggssapi_krb5-2.dll - os=4.0 img=1.0 sys=4.0
    "cyggssapi_krb5-2.dll" v0.0 ts=2018-03-16 03:46
    C:\Windows\Cygwin\bin\cygk5crypto-3.dll - os=4.0 img=1.0 sys=4.0
      "cygk5crypto-3.dll" v0.0 ts=2018-03-16 03:45
      C:\Windows\Cygwin\bin\cygkrb5support-0.dll - os=4.0 img=1.0 sys=4.0
        "cygkrb5support-0.dll" v0.0 ts=2018-03-16 03:44
        C:\Windows\Cygwin\bin\cygwin1.dll (already done)
        C:\Windows\Cygwin\bin\cygintl-8.dll - os=4.0 img=1.0 sys=4.0
          "cygintl-8.dll" v0.0 ts=2021-07-29 03:43
          C:\Windows\Cygwin\bin\cygwin1.dll (already done)
          C:\Windows\Cygwin\bin\cygiconv-2.dll - os=4.0 img=1.0 sys=4.0
            "cygiconv-2.dll" v0.0 ts=2020-07-13 13:57
            C:\Windows\Cygwin\bin\cygwin1.dll (already done)
            C:\Windows\system32\KERNEL32.dll (already done)
          C:\Windows\system32\KERNEL32.dll (already done)
        C:\Windows\system32\KERNEL32.dll (already done)
      C:\Windows\Cygwin\bin\cygwin1.dll (already done)
      C:\Windows\Cygwin\bin\cygintl-8.dll (already done)
      C:\Windows\system32\KERNEL32.dll (already done)
    C:\Windows\Cygwin\bin\cygkrb5-3.dll - os=4.0 img=1.0 sys=4.0
      "cygkrb5-3.dll" v0.0 ts=2018-03-16 03:45
      C:\Windows\Cygwin\bin\cygk5crypto-3.dll (already done)
      C:\Windows\Cygwin\bin\cygkrb5support-0.dll (already done)
      C:\Windows\Cygwin\bin\cygcom_err-2.dll - os=4.0 img=1.0 sys=4.0
        "cygcom_err-2.dll" v0.0 ts=2019-01-02 01:21
        C:\Windows\Cygwin\bin\cygwin1.dll (already done)
        C:\Windows\Cygwin\bin\cyggcc_s-1.dll (already done)
        C:\Windows\system32\KERNEL32.dll (already done)
      C:\Windows\Cygwin\bin\cygwin1.dll (already done)
      C:\Windows\Cygwin\bin\cygintl-8.dll (already done)
      C:\Windows\Cygwin\bin\cyggcc_s-1.dll (already done)
      C:\Windows\system32\KERNEL32.dll (already done)
    C:\Windows\Cygwin\bin\cygkrb5support-0.dll (already done)
    C:\Windows\Cygwin\bin\cygcom_err-2.dll (already done)
    C:\Windows\Cygwin\bin\cygwin1.dll (already done)
    C:\Windows\Cygwin\bin\cygintl-8.dll (already done)
    C:\Windows\system32\KERNEL32.dll (already done)
  C:\Windows\Cygwin\bin\cygz.dll (already done)
  C:\Windows\Cygwin\bin\cyggcc_s-1.dll (already done)
  C:\Windows\system32\KERNEL32.dll (already done)


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