Re: ceph-mgr with large connections in CLOSE_WAIT state

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Hi,

Any thoughts on this?

Regards
Shridhar

On Thu, Apr 9, 2020 at 5:17 PM Void Star Nill <void.star.nill@xxxxxxxxx>
wrote:

> Hi,
>
> I am seeing a large number of connections from ceph-mgr are stuck in
> CLOSE_WAIT state with data stuck in the receive queue. Looks like ceph-mgr
> process is not reading the data completely off the socket buffers and
> terminating the connections properly.
>
> I also notice that the access to dashboard plugin stops working after
> couple of days and I need to restart ceph-mgr for it to start working again.
>
> I haven't noticed any impact of volume I/O operations though.
>
> We are running nautilus version (14.2.4-1xenial)
>
> Is this a known issue?
>
> $ sudo netstat -anp|grep CLOSE_WAIT | wc -l
> 906
>
> $ sudo netstat -anp|grep CLOSE_WAIT
> tcp6      77      0 x.x.x.x:8443     x.x.12.195:48624     CLOSE_WAIT
>  161716/ceph-mgr
> tcp6     210      0 x.x.x.x:8443     x.x.12.209:59220     CLOSE_WAIT
>  161716/ceph-mgr
> tcp6    2443      0 x.x.x.x:8443     x.x.0.103:65276      CLOSE_WAIT
>  161716/ceph-mgr
> tcp6     159      0 x.x.x.x:8443     x.x.12.202:60150     CLOSE_WAIT
>  161716/ceph-mgr
> tcp6       1      0 x.x.x.x:8443     x.x.12.161:51472     CLOSE_WAIT
>  161716/ceph-mgr
> tcp6     283      0 x.x.x.x:8443     x.x.12.202:44900     CLOSE_WAIT
>  161716/ceph-mgr
> tcp6      32      0 x.x.x.x:8443     x.x.12.207:58202     CLOSE_WAIT
>  161716/ceph-mgr
> tcp6      32      0 x.x.x.x:8443     x.x.12.200:52162     CLOSE_WAIT
>  161716/ceph-mgr
> tcp6      32      0 x.x.x.x:8443     x.x.12.167:43148     CLOSE_WAIT
>  161716/ceph-mgr
> tcp6     305      0 x.x.x.x:8443     x.x.12.167:60102     CLOSE_WAIT
>  161716/ceph-mgr
> tcp6      79      0 x.x.x.x:8443     x.x.12.195:48504     CLOSE_WAIT
>  161716/ceph-mgr
> tcp6      69      0 x.x.x.x:8443     x.x.12.167:50362     CLOSE_WAIT
>  161716/ceph-mgr
> tcp6      38      0 x.x.x.x:8443     x.x.12.167:36840     CLOSE_WAIT
>  161716/ceph-mgr
> tcp6      76      0 x.x.x.x:8443     x.x.12.209:54166     CLOSE_WAIT
>  161716/ceph-mgr
> tcp6      68      0 x.x.x.x:8443     x.x.12.207:34312     CLOSE_WAIT
>  161716/ceph-mgr
> tcp6     209      0 x.x.x.x:8443     x.x.12.209:52642     CLOSE_WAIT
>  161716/ceph-mgr
> tcp6     220      0 x.x.x.x:8443     x.x.12.202:41156     CLOSE_WAIT
>  161716/ceph-mgr
> tcp6     202      0 x.x.x.x:8443     x.x.12.209:55448     CLOSE_WAIT
>  161716/ceph-mgr
> tcp6     193      0 x.x.x.x:8443     x.x.12.207:56296     CLOSE_WAIT
>  161716/ceph-mgr
> tcp6     672      0 x.x.x.x:8443     x.x.12.207:35516     CLOSE_WAIT
>  161716/ceph-mgr
> tcp6    1186      0 x.x.x.x:8443     x.x.28.4:54074       CLOSE_WAIT
>  161716/ceph-mgr
> tcp6     163      0 x.x.x.x:8443     x.x.12.209:54458     CLOSE_WAIT
>  161716/ceph-mgr
> tcp6     214      0 x.x.x.x:8443     x.x.12.167:54912     CLOSE_WAIT
>  161716/ceph-mgr
> tcp6     129      0 x.x.x.x:8443     x.x.12.200:42494     CLOSE_WAIT
>  161716/ceph-mgr
> tcp6      86      0 x.x.x.x:8443     x.x.12.195:58618     CLOSE_WAIT
>  161716/ceph-mgr
> tcp6     103      0 x.x.x.x:8443     x.x.12.209:45408     CLOSE_WAIT
>  161716/ceph-mgr
> tcp6      77      0 x.x.x.x:8443     x.x.12.202:60792     CLOSE_WAIT
>  161716/ceph-mgr
> tcp6     189      0 x.x.x.x:8443     x.x.12.161:58640     CLOSE_WAIT
>  161716/ceph-mgr
> tcp6      68      0 x.x.x.x:8443     x.x.12.167:42004     CLOSE_WAIT
>  161716/ceph-mgr
> tcp6       1      0 x.x.x.x:8443     x.x.12.195:36348     CLOSE_WAIT
>  161716/ceph-mgr
>
> Thanks,
> Shridhar
>
>
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