[ClusterLabs] trace of Filesystem RA does not log

[Gang He]

> -----Original Message-----
> From: Users [mailto:users-bounces at clusterlabs.org] On Behalf Of Lentes,
> Bernd
> Sent: 2019年10月14日 20:04
> To: Pacemaker ML <users at clusterlabs.org>
> Subject: Re: [ClusterLabs] trace of Filesystem RA does not log
> 
> 
> >> -----Original Message-----
> >> From: Users [mailto:users-bounces at clusterlabs.org] On Behalf Of
> >> Lentes, Bernd
> >> Sent: 2019年10月11日 22:32
> >> To: Pacemaker ML <users at clusterlabs.org>
> >> Subject: [ClusterLabs] trace of Filesystem RA does not log
> >>
> >> Hi,
> >>
> >> occasionally the stop of a Filesystem resource for an OCFS2 Partition
> >> fails to stop.
> > Which SLE version are you using?
> > When ocfs2 file system stop fails, that means the umount process is hung?
> > Could you cat that process stack via /proc/xxx/stack?
> > Of course, you also can use o2locktop to identify if there is any
> > active/hanged dlm lock at that moment.
> >
> 
> I'm using SLES 12 SP4. I don't know exactly why umount isn't working or if it
> hangs, that's why i tried to trace the stop operation to have more infos.
> I will test o2locktop.
> What do you mean by "/proc/xxx/stack" ?
> The stack of which process should i investigate ? umount ?
Yes, you can use "pstree" command to find umount related processes,
Then cat the related processes' stack.
Usually, the last process hang point can help to find the root cause.


Thanks
Gang
> 
> 
> Bernd
> 
> 
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