Misleading error: Failed to delete old semaphore

[389-ds-bot]

Cloned from Pagure issue: https://pagure.io/389-ds-base/issue/48538

• Created at 2016-02-09 08:46:51 by firstyear (@Firstyear)
• Closed at 2017-05-24 17:04:39 as fixed
• Assigned to firstyear (@Firstyear)
• Associated bugzillas
  • https://bugzilla.redhat.com/show_bug.cgi?id=1357682

---

I received the error

[09/Feb/2016:12:21:26 +101800] - 389-Directory/1.3.5 B2016.040.145 starting up
[09/Feb/2016:12:21:26 +101800] - Failed to delete old semaphore for stats file (/opt/dirsrv/var/run/dirsrv/slapd-localhost.stats). Error 13 (Permission denied).

But there was no such file.

/opt# ls -al /opt/dirsrv/var/run/dirsrv/slapd-localhost.stats
ls: cannot access /opt/dirsrv/var/run/dirsrv/slapd-localhost.stats: No such file or directory

Turns out you need to remove:

/dev/shm/sem.slapd-localhost.stats

We should correctly indicate in the logs what the file is we are trying to access.

[389-ds-bot]

Comment from firstyear (@Firstyear) at 2016-08-17 12:33:31

I think this is invalid now as elkris has removed the semaphores in question.

Closing invalid.

[389-ds-bot]

Comment from vashirov (@vashirov) at 2016-10-15 17:08:32

With nunc-stans enabled file /dev/shm/sem.slapd-standalone.stats gets created. And if the instance was killed, it can't clean it up because of selinux denials:

[15/Oct/2016:06:53:03.508211988 -0400] - INFO - main - 389-Directory/1.3.6.0 B2016.288.2056 starting up
[15/Oct/2016:06:53:03.510215312 -0400] - EMERG - snmp_collator_create_semaphore - Failed to delete old semaphore for stats file (/var/run/dirsrv/slapd-standalone.stats). Error 13 (Permission denied).

time->Sat Oct 15 06:53:03 2016
type=SYSCALL msg=audit(1476528783.509:538): arch=c000003e syscall=87 success=no exit=-13 a0=7ffccb008cf0 a1=7fe14287a7c1 a2=7fe13fee5a16 a3=7ffccb008ae0 items=0 ppid=1 pid=22093 auid=4294967295 uid=389 gid=389 euid=389 suid=389 fsuid=389 egid=389 sgid=389 fsgid=389 tty=(none) ses=4294967295 comm="ns-slapd" exe="/usr/sbin/ns-slapd" subj=system_u:system_r:dirsrv_t:s0 key=(null)
type=AVC msg=audit(1476528783.509:538): avc:  denied  { unlink } for  pid=22093 comm="ns-slapd" name="sem.slapd-standalone.stats" dev="tmpfs" ino=49935 scontext=system_u:system_r:dirsrv_t:s0 tcontext=unconfined_u:object_r:user_tmp_t:s0 tclass=file

The message is still misleading, because /var/run/dirsrv/slapd-standalone.stats can be deleted, but /dev/shm/sem.slapd-standalone.stats - can't be.

[389-ds-bot]

Comment from firstyear (@Firstyear) at 2016-10-17 10:48:45

attachment
0001-Ticket-48538-Failed-to-delete-old-semaphore.patch

[389-ds-bot]

Comment from firstyear (@Firstyear) at 2016-10-18 04:09:51

commit d53ad9a
Writing objects: 100% (12/12), 1.42 KiB | 0 bytes/s, done.
Total 12 (delta 8), reused 0 (delta 0)
To ssh://git.fedorahosted.org/git/389/ds.git
61c72f9..d53ad9a master -> master

[389-ds-bot]

Comment from firstyear (@Firstyear) at 2017-02-11 22:51:13

Metadata Update from @Firstyear:

• Issue assigned to Firstyear
• Issue set to the milestone: 1.3.6 backlog

[389-ds-bot]

Comment from firstyear (@Firstyear) at 2017-05-22 02:51:51

Hey @vashirov does this fix up the warning message for you?

[389-ds-bot]

Comment from firstyear (@Firstyear) at 2017-05-22 02:52:07

Metadata Update from @Firstyear:

• Custom field reviewstatus adjusted to review (was: ack)

[389-ds-bot]

Comment from mreynolds (@mreynolds389) at 2017-05-24 17:04:43

master

b81c8ba

1.3.6
ca548a7

[389-ds-bot]

Comment from mreynolds (@mreynolds389) at 2017-05-24 17:04:46

Metadata Update from @mreynolds389:

• Custom field reviewstatus adjusted to ack (was: review)
• Issue close_status updated to: fixed
• Issue status updated to: Closed (was: Open)