Could not parse handle.exe output warning

[Alexander Shevchenko]

Hi,

RabbitMQ 3.6.9 on Erlang 19.2 inside Windows Docker container on Windows Server 2016

I've got the warning in rab...@ofslog-staging.log file:

=WARNING REPORT==== 11-Sep-2017::05:56:39 ===
Could not parse handle.exe output: "\r\nNthandle v4.1 - Handle viewer\r\nCopyright (C) 1997-2016 Mark Russinovich\r\nSysinternals - www.sysinternals.com\r\n\r\nHandle type summary:\r\r\n  <Unknown type>  : 190\r\r\n  <Unknown type>  : 88\r\r\n  <Unknown type>  : 55\r\r\n  ALPC Port       : 1\r\r\n  Desktop         : 1\r\r\n  Directory       : 2\r\r\n  IoCompletion    : 4\r\r\n  IRTimer         : 6\r\r\n  Key             : 6\r\r\n  Process         : 4\r\r\n  Semaphore       : 2\r\r\n  Thread          : 76\r\r\n  TpWorkerFactory : 3\r\r\n  WaitCompletionPacket: 7\r\r\n  WindowStation   : 2\r\r\nTotal handles: 447\r\r\n"

The output from powershell window:

PS> handle.exe /accepteula -s -p 227552


Nthandle v4.1 - Handle viewer
Copyright (C) 1997-2016 Mark Russinovich
Sysinternals - www.sysinternals.com


Handle type summary:
  <Unknown type>  : 55
  ALPC Port       : 1
  Desktop         : 1
  Directory       : 2
  Event           : 210
  File            : 27
  IoCompletion    : 4
  IRTimer         : 6
  Key             : 6
  Process         : 3
  Semaphore       : 2
  Thread          : 96
  TpWorkerFactory : 3
  WaitCompletionPacket: 7
  WindowStation   : 2
Total handles: 425

I've attached log files.

Also I don't understand EACCESS error in log file. Looks like it can't access handle.exe. But other time it can, as it sees output from handle.exe.

Thank you.

[Michael Klishin]

EACCESS can be due to insufficient permissions but also access blocked for other reasons, such as (it's a guess, there is

no evidence of this in this case) concurrent access to a resource, antivirus software blocking operations and so on.

The consequence of that is that the node won't have any information about the number of file descriptors

it uses.

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[Luke Bakken]

Hello,

Note the <Unknown type> lines. The code that reads the output from handle.exe expects to find a line containing File, which isn't shown. It appears that running handle.exe on its own always works.

Thanks,

Luke