[Gluster-users] blocking process on FUSE mount in directory which is using quota
mabi
mabi at protonmail.ch
Thu Aug 9 14:24:49 UTC 2018
Thanks for the documentation. On my client using FUSE mount I found the PID by using ps (output below):
root 456 1 4 14:17 ? 00:05:15 /usr/sbin/glusterfs --volfile-server=gfs1a --volfile-id=myvol-private /mnt/myvol-private
Then I ran the following command
sudo kill -USR1 456
but now I can't find where the files are stored. Are these supposed to be stored on the client directly? I checked /var/run/gluster and /var/log/gluster but could not see anything and /var/log/gluster does not even exist on the client.
‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
On August 9, 2018 3:59 PM, Raghavendra Gowdappa <rgowdapp at redhat.com> wrote:
> On Thu, Aug 9, 2018 at 6:47 PM, mabi <mabi at protonmail.ch> wrote:
>
>> Hi Nithya,
>>
>> Thanks for the fast answer. Here the additional info:
>>
>> 1. gluster volume info
>>
>> Volume Name: myvol-private
>> Type: Replicate
>> Volume ID: e7a40a1b-45c9-4d3c-bb19-0c59b4eceec5
>> Status: Started
>> Snapshot Count: 0
>> Number of Bricks: 1 x (2 + 1) = 3
>> Transport-type: tcp
>> Bricks:
>> Brick1: gfs1a:/data/myvol-private/brick
>> Brick2: gfs1b:/data/myvol-private/brick
>> Brick3: gfs1c:/srv/glusterfs/myvol-private/brick (arbiter)
>> Options Reconfigured:
>> features.default-soft-limit: 95%
>> transport.address-family: inet
>> features.quota-deem-statfs: on
>> features.inode-quota: on
>> features.quota: on
>> nfs.disable: on
>> performance.readdir-ahead: on
>> client.event-threads: 4
>> server.event-threads: 4
>> auth.allow: 192.168.100.92
>>
>> 2. Sorry I have no clue how to take a "statedump" of a process on Linux. Which command should I use for that? and which process would you like, the blocked process (for example "ls")?
>
> Statedumps are gluster specific. Please refer to https://docs.gluster.org/en/v3/Troubleshooting/statedump/ for instructions.
>
>> Regards,
>> M.
>>
>> ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
>> On August 9, 2018 3:10 PM, Nithya Balachandran <nbalacha at redhat.com> wrote:
>>
>>> Hi,
>>>
>>> Please provide the following:
>>>
>>> - gluster volume info
>>> - statedump of the fuse process when it hangs
>>>
>>> Thanks,
>>> Nithya
>>>
>>> On 9 August 2018 at 18:24, mabi <mabi at protonmail.ch> wrote:
>>>
>>>> Hello,
>>>>
>>>> I recently upgraded my GlusterFS replica 2+1 (aribter) to version 3.12.12 and now I see a weird behaviour on my client (using FUSE mount) where I have processes (PHP 5.6 FPM) trying to access a specific directory and then the process blocks. I can't kill the process either, not even with kill -9. I need to reboot the machine in order to get rid of these blocked processes.
>>>>
>>>> This directory has one particularity compared to the other directories it is that it has reached it's quota soft-limit as you can see here in the output of gluster volume quota list:
>>>>
>>>> Path Hard-limit Soft-limit Used Available Soft-limit exceeded? Hard-limit exceeded?
>>>> -------------------------------------------------------------------------------------------------------------------------------
>>>> /directory 100.0GB 80%(80.0GB) 90.5GB 9.5GB Yes No
>>>>
>>>> That does not mean that it is the quota's fault but it might be a hint where to start looking for... And by the way can someone explain me what the soft-limit does? or does it not do anything special?
>>>>
>>>> Here is an the linux stack of a blocking process on that directory which happened with a simple "ls -la":
>>>>
>>>> [Thu Aug 9 14:21:07 2018] INFO: task ls:2272 blocked for more than 120 seconds.
>>>> [Thu Aug 9 14:21:07 2018] Not tainted 3.16.0-4-amd64 #1
>>>> [Thu Aug 9 14:21:07 2018] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
>>>> [Thu Aug 9 14:21:07 2018] ls D ffff88017ef93200 0 2272 2268 0x00000004
>>>> [Thu Aug 9 14:21:07 2018] ffff88017653f490 0000000000000286 0000000000013200 ffff880174d7bfd8
>>>> [Thu Aug 9 14:21:07 2018] 0000000000013200 ffff88017653f490 ffff8800eeb3d5f0 ffff8800fefac800
>>>> [Thu Aug 9 14:21:07 2018] ffff880174d7bbe0 ffff8800eeb3d6d0 ffff8800fefac800 ffff8800ffe1e1c0
>>>> [Thu Aug 9 14:21:07 2018] Call Trace:
>>>> [Thu Aug 9 14:21:07 2018] [<ffffffffa00dc50d>] ? __fuse_request_send+0xbd/0x270 [fuse]
>>>> [Thu Aug 9 14:21:07 2018] [<ffffffff810abce0>] ? prepare_to_wait_event+0xf0/0xf0
>>>> [Thu Aug 9 14:21:07 2018] [<ffffffffa00e0791>] ? fuse_dentry_revalidate+0x181/0x300 [fuse]
>>>> [Thu Aug 9 14:21:07 2018] [<ffffffff811b944e>] ? lookup_fast+0x25e/0x2b0
>>>> [Thu Aug 9 14:21:07 2018] [<ffffffff811bacc5>] ? path_lookupat+0x155/0x780
>>>> [Thu Aug 9 14:21:07 2018] [<ffffffff81195715>] ? kmem_cache_alloc+0x75/0x480
>>>> [Thu Aug 9 14:21:07 2018] [<ffffffffa00dfca9>] ? fuse_getxattr+0xe9/0x150 [fuse]
>>>> [Thu Aug 9 14:21:07 2018] [<ffffffff811bb316>] ? filename_lookup+0x26/0xc0
>>>> [Thu Aug 9 14:21:07 2018] [<ffffffff811bf594>] ? user_path_at_empty+0x54/0x90
>>>> [Thu Aug 9 14:21:07 2018] [<ffffffff81193e08>] ? kmem_cache_free+0xd8/0x210
>>>> [Thu Aug 9 14:21:07 2018] [<ffffffff811bf59f>] ? user_path_at_empty+0x5f/0x90
>>>> [Thu Aug 9 14:21:07 2018] [<ffffffff811b3d46>] ? vfs_fstatat+0x46/0x90
>>>> [Thu Aug 9 14:21:07 2018] [<ffffffff811b421d>] ? SYSC_newlstat+0x1d/0x40
>>>> [Thu Aug 9 14:21:07 2018] [<ffffffff811d34b8>] ? SyS_lgetxattr+0x58/0x80
>>>> [Thu Aug 9 14:21:07 2018] [<ffffffff81525d0d>] ? system_call_fast_compare_end+0x10/0x15
>>>>
>>>> My 3 gluster nodes are all Debian 9 and my client Debian 8.
>>>>
>>>> Let me know if you need more information.
>>>>
>>>> Best regards,
>>>> Mabi
>>>> _______________________________________________
>>>> Gluster-users mailing list
>>>> Gluster-users at gluster.org
>>>> https://lists.gluster.org/mailman/listinfo/gluster-users
>>
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