Bug 45297 - Socket unit crashing with "File exists"
Summary: Socket unit crashing with "File exists"
Alias: None
Product: systemd
Classification: Unclassified
Component: general (show other bugs)
Version: unspecified
Hardware: x86 (IA32) Linux (All)
: medium normal
Assignee: Lennart Poettering
QA Contact:
Depends on:
Reported: 2012-01-27 01:55 UTC by freedesktop.org
Modified: 2012-03-13 19:10 UTC (History)
0 users

See Also:
i915 platform:
i915 features:


Description freedesktop.org 2012-01-27 01:55:04 UTC
I have a socket-activated unit with Accept=true.
The unit failed with this error message:

Jan 26 06:21:35 b071 systemd[1]: netqmail-smtpd.socket failed to queue socket startup job: File exists
Jan 26 06:21:35 b071 systemd[1]: Unit netqmail-smtpd.socket entered failed state.

So far this has happened only once. Nobody was twiddling with unit files or anything else related to systemd at that time.

I suppose (wild guess) the EEXISTS comes from unit_add_name(), possibly due to a race condition where the remote side opens and closes the socket several times with the same remote port number.

This bug is related to #39016 insofar as my comment in https://bugzilla.novell.com/show_bug.cgi?id=741590 applies here, too:

> IMO it's a really bad idea to shut down the listening socket when an error
regarding the accept()ed socket occurs. systemd need to be much more robust
Comment 1 Lennart Poettering 2012-03-13 19:10:22 UTC
Fixed in 77b088c211a0939cb94969b487e5746bb05d12ae (i.e. names are now guaranteed to be unique). And also 9586cdfab6a2638078702b7fea7e16b3a71899e2 to make failing setup for an incoming connection less problematic.

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