[Bug 263686] Re: rsyncd parent process hangs with 100% cpu usage

[Serge Hallyn]

Please reply if this is still an issue on a supported release.


** Changed in: rsync (Ubuntu)
       Status: New => Invalid

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https://bugs.launchpad.net/bugs/263686

Title:
  rsyncd parent process hangs with 100% cpu usage

Status in “rsync” package in Ubuntu:
  Invalid

Bug description:
  Binary package hint: rsync

  On our public free software mirror (also se.releases.u.c) we run amd64
  hardy on the frontends. The rsyncd parent process quite often stops
  responding to new connections, and during this it seems to spin on cpu
  with 100% cpu usage. A quick check with strace on this process doesn't
  show any syscalls happening.

  We currently have a script in cron.hourly that restarts rsyncd if
  there is nothing responding on localhost:: but even then the outages
  are frequent enough that it is a problem for our users (especially
  downstream mirrors). I would guesstimate at a couple of restarts every
  week.

  We've observed this bug since dapper/sarge, but it seems to just get
  worse, so I'm finally getting around to reporting it. Any suggestions
  for tracking it down are most welcome, at least if they can be
  implemented transparently on a production system.

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