[Gluster-users] Geo-Replication memory leak on slave node

Mark Betham mark.betham at performancehorizon.com
Wed Jun 20 10:27:01 UTC 2018


Hi Kotresh,

Many thanks for your prompt response.  No need to apologise, any help you
can provide is greatly appreciated.

I look forward to receiving your update next week.

Many thanks,

Mark Betham

On Wed, 20 Jun 2018 at 10:55, Kotresh Hiremath Ravishankar <
khiremat at redhat.com> wrote:

> Hi Mark,
>
> Sorry, I was busy and could not take a serious look at the logs. I can
> update you on Monday.
>
> Thanks,
> Kotresh HR
>
> On Wed, Jun 20, 2018 at 12:32 PM, Mark Betham <
> mark.betham at performancehorizon.com> wrote:
>
>> Hi Kotresh,
>>
>> I was wondering if you had made any progress with regards to the issue I
>> am currently experiencing with geo-replication.
>>
>> For info the fault remains and effectively requires a restart of the
>> geo-replication service on a daily basis to reclaim the used memory on the
>> slave node.
>>
>> If you require any further information then please do not hesitate to ask.
>>
>> Many thanks,
>>
>> Mark Betham
>>
>>
>> On Mon, 11 Jun 2018 at 08:24, Mark Betham <
>> mark.betham at performancehorizon.com> wrote:
>>
>>> Hi Kotresh,
>>>
>>> Many thanks.  I will shortly setup a share on my GDrive and send the
>>> link directly to yourself.
>>>
>>> For Info;
>>> The Geo-Rep slave failed again over the weekend but it did not recover
>>> this time.  It looks to have become unresponsive at around 14:40 UTC on 9th
>>> June.  I have attached an image showing the mem usage and you can see from
>>> this when the system failed.  The system was totally unresponsive and
>>> required a cold power off and then power on in order to recover the server.
>>>
>>> Many thanks for your help.
>>>
>>> Mark Betham.
>>>
>>> On 11 June 2018 at 05:53, Kotresh Hiremath Ravishankar <
>>> khiremat at redhat.com> wrote:
>>>
>>>> Hi Mark,
>>>>
>>>> Google drive works for me.
>>>>
>>>> Thanks,
>>>> Kotresh HR
>>>>
>>>> On Fri, Jun 8, 2018 at 3:00 PM, Mark Betham <
>>>> mark.betham at performancehorizon.com> wrote:
>>>>
>>>>> Hi Kotresh,
>>>>>
>>>>> The memory issue re-occurred again.  This is indicating it will occur
>>>>> around once a day.
>>>>>
>>>>> Again no traceback listed in the log, the only update in the log was
>>>>> as follows;
>>>>> [2018-06-08 08:26:43.404261] I [resource(slave):1020:service_loop]
>>>>> GLUSTER: connection inactive, stopping timeout=120
>>>>> [2018-06-08 08:29:19.357615] I [syncdutils(slave):271:finalize] <top>:
>>>>> exiting.
>>>>> [2018-06-08 08:31:02.432002] I [resource(slave):1502:connect] GLUSTER:
>>>>> Mounting gluster volume locally...
>>>>> [2018-06-08 08:31:03.716967] I [resource(slave):1515:connect] GLUSTER:
>>>>> Mounted gluster volume duration=1.2729
>>>>> [2018-06-08 08:31:03.717411] I [resource(slave):1012:service_loop]
>>>>> GLUSTER: slave listening
>>>>>
>>>>> I have attached an image showing the latest memory usage pattern.
>>>>>
>>>>> Can you please advise how I can pass the log data across to you?  As
>>>>> soon as I know this I will get the data uploaded for your review.
>>>>>
>>>>> Thanks,
>>>>>
>>>>> Mark Betham
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> On 7 June 2018 at 08:19, Mark Betham <
>>>>> mark.betham at performancehorizon.com> wrote:
>>>>>
>>>>>> Hi Kotresh,
>>>>>>
>>>>>> Many thanks for your prompt response.
>>>>>>
>>>>>> Below are my responses to your questions;
>>>>>>
>>>>>> 1. Is this trace back consistently hit? I just wanted to confirm
>>>>>> whether it's transient which occurs once in a while and gets back to normal?
>>>>>> It appears not.  As soon as the geo-rep recovered yesterday from the
>>>>>> high memory usage it immediately began rising again until it consumed all
>>>>>> of the available ram.  But this time nothing was committed to the log file.
>>>>>> I would like to add here that this current instance of geo-rep was
>>>>>> only brought online at the start of this week due to the issues with glibc
>>>>>> on CentOS 7.5.  This is the first time I have had geo-rep running with
>>>>>> Gluster ver 3.12.9, both storage clusters at each physical site were only
>>>>>> rebuilt approx. 4 weeks ago, due to the previous version in use going EOL.
>>>>>> Prior to this I had been running 3.13.2 (3.13.X now EOL) at each of the
>>>>>> sites and it is worth noting that the same behaviour was also seen on this
>>>>>> version of Gluster, unfortunately I do not have any of the log data from
>>>>>> then but I do not recall seeing any instances of the trace back message
>>>>>> mentioned.
>>>>>>
>>>>>> 2. Please upload the complete geo-rep logs from both master and slave.
>>>>>> I have the log files, just checking to make sure there is no
>>>>>> confidential info inside.  The logfiles are too big to send via email, even
>>>>>> when compressed.  Do you have a preferred method to allow me to share this
>>>>>> data with you or would a share from my Google drive be sufficient?
>>>>>>
>>>>>> 3. Are the gluster versions same across master and slave?
>>>>>> Yes, all gluster versions are the same across the two sites for all
>>>>>> storage nodes.  See below for version info taken from the current geo-rep
>>>>>> master.
>>>>>>
>>>>>> glusterfs 3.12.9
>>>>>> Repository revision: git://git.gluster.org/glusterfs.git
>>>>>> Copyright (c) 2006-2016 Red Hat, Inc. <https://www.gluster.org/>
>>>>>> GlusterFS comes with ABSOLUTELY NO WARRANTY.
>>>>>> It is licensed to you under your choice of the GNU Lesser
>>>>>> General Public License, version 3 or any later version (LGPLv3
>>>>>> or later), or the GNU General Public License, version 2 (GPLv2),
>>>>>> in all cases as published by the Free Software Foundation.
>>>>>>
>>>>>> glusterfs-geo-replication-3.12.9-1.el7.x86_64
>>>>>> glusterfs-gnfs-3.12.9-1.el7.x86_64
>>>>>> glusterfs-libs-3.12.9-1.el7.x86_64
>>>>>> glusterfs-server-3.12.9-1.el7.x86_64
>>>>>> glusterfs-3.12.9-1.el7.x86_64
>>>>>> glusterfs-api-3.12.9-1.el7.x86_64
>>>>>> glusterfs-events-3.12.9-1.el7.x86_64
>>>>>> centos-release-gluster312-1.0-1.el7.centos.noarch
>>>>>> glusterfs-client-xlators-3.12.9-1.el7.x86_64
>>>>>> glusterfs-cli-3.12.9-1.el7.x86_64
>>>>>> python2-gluster-3.12.9-1.el7.x86_64
>>>>>> glusterfs-rdma-3.12.9-1.el7.x86_64
>>>>>> glusterfs-fuse-3.12.9-1.el7.x86_64
>>>>>>
>>>>>> I have also attached another screenshot showing the memory usage from
>>>>>> the Gluster slave for the last 48 hours.  This shows memory saturation from
>>>>>> yesterday, which correlates with the trace back sent yesterday, and the
>>>>>> subsequent memory saturation which occurred over the last 24 hours.  For
>>>>>> info, all times are in UTC.
>>>>>>
>>>>>> Please advise the preferred method to get the log data across to you
>>>>>> and also if you require any further information.
>>>>>>
>>>>>> Many thanks,
>>>>>>
>>>>>> Mark Betham
>>>>>>
>>>>>>
>>>>>> On 7 June 2018 at 04:42, Kotresh Hiremath Ravishankar <
>>>>>> khiremat at redhat.com> wrote:
>>>>>>
>>>>>>> Hi Mark,
>>>>>>>
>>>>>>> Few questions.
>>>>>>>
>>>>>>> 1. Is this trace back consistently hit? I just wanted to confirm
>>>>>>> whether it's transient which occurs once in a while and gets back to normal?
>>>>>>> 2. Please upload the complete geo-rep logs from both master and
>>>>>>> slave.
>>>>>>> 3. Are the gluster versions same across master and slave?
>>>>>>>
>>>>>>> Thanks,
>>>>>>> Kotresh HR
>>>>>>>
>>>>>>> On Wed, Jun 6, 2018 at 7:10 PM, Mark Betham <
>>>>>>> mark.betham at performancehorizon.com> wrote:
>>>>>>>
>>>>>>>> Dear Gluster-Users,
>>>>>>>>
>>>>>>>> I have geo-replication setup and configured between 2 Gluster pools
>>>>>>>> located at different sites.  What I am seeing is an error being reported
>>>>>>>> within the geo-replication slave log as follows;
>>>>>>>>
>>>>>>>> *[2018-06-05 12:05:26.767615] E
>>>>>>>> [syncdutils(slave):331:log_raise_exception] <top>: FAIL: *
>>>>>>>> *Traceback (most recent call last):*
>>>>>>>> *  File "/usr/libexec/glusterfs/python/syncdaemon/syncdutils.py",
>>>>>>>> line 361, in twrap*
>>>>>>>> *    tf(*aa)*
>>>>>>>> *  File "/usr/libexec/glusterfs/python/syncdaemon/resource.py",
>>>>>>>> line 1009, in <lambda>*
>>>>>>>> *    t = syncdutils.Thread(target=lambda: (repce.service_loop(),*
>>>>>>>> *  File "/usr/libexec/glusterfs/python/syncdaemon/repce.py", line
>>>>>>>> 90, in service_loop*
>>>>>>>> *    self.q.put(recv(self.inf))*
>>>>>>>> *  File "/usr/libexec/glusterfs/python/syncdaemon/repce.py", line
>>>>>>>> 61, in recv*
>>>>>>>> *    return pickle.load(inf)*
>>>>>>>> *ImportError: No module named
>>>>>>>> h_2013-04-26-04:02:49-2013-04-26_11:02:53.gz.15WBuUh*
>>>>>>>> *[2018-06-05 12:05:26.768085] E [repce(slave):117:worker] <top>:
>>>>>>>> call failed: *
>>>>>>>> *Traceback (most recent call last):*
>>>>>>>> *  File "/usr/libexec/glusterfs/python/syncdaemon/repce.py", line
>>>>>>>> 113, in worker*
>>>>>>>> *    res = getattr(self.obj, rmeth)(*in_data[2:])*
>>>>>>>> *TypeError: getattr(): attribute name must be string*
>>>>>>>>
>>>>>>>> From this point in time the slave server begins to consume all of
>>>>>>>> its available RAM until it becomes non-responsive.  Eventually the gluster
>>>>>>>> service seems to kill off the offending process and the memory is returned
>>>>>>>> to the system.  Once the memory has been returned to the remote slave
>>>>>>>> system the geo-replication often recovers and data transfer resumes.
>>>>>>>>
>>>>>>>> I have attached the full geo-replication slave log containing the
>>>>>>>> error shown above.  I have also attached an image file showing the memory
>>>>>>>> usage of the affected storage server.
>>>>>>>>
>>>>>>>> We are currently running Gluster version 3.12.9 on top of CentOS
>>>>>>>> 7.5 x86_64.  The system has been fully patched and is running the latest
>>>>>>>> software, excluding glibc which had to be downgraded to get geo-replication
>>>>>>>> working.
>>>>>>>>
>>>>>>>> The Gluster volume runs on a dedicated partition using the XFS
>>>>>>>> filesystem which in turn is running on a LVM thin volume.  The physical
>>>>>>>> storage is presented as a single drive due to the underlying disks being
>>>>>>>> part of a raid 10 array.
>>>>>>>>
>>>>>>>> The Master volume which is being replicated has a total of 2.2 TB
>>>>>>>> of data to be replicated.  The total size of the volume fluctuates very
>>>>>>>> little as data being removed equals the new data coming in.  This data is
>>>>>>>> made up of many thousands of files across many separated directories.  Data
>>>>>>>> file sizes vary from the very small (>1K) to the large (>1Gb).  The Gluster
>>>>>>>> service itself is running with a single volume in a replicated
>>>>>>>> configuration across 3 bricks at each of the sites.  The delta changes
>>>>>>>> being replicated are on average about 100GB per day, where this includes
>>>>>>>> file creation / deletion / modification.
>>>>>>>>
>>>>>>>> The config for the geo-replication session is as follows, taken
>>>>>>>> from the current source server;
>>>>>>>>
>>>>>>>> *special_sync_mode: partial*
>>>>>>>> *gluster_log_file:
>>>>>>>> /var/log/glusterfs/geo-replication/glustervol0/ssh%3A%2F%2Froot%40storage-server.local%3Agluster%3A%2F%2F127.0.0.1%3Aglustervol1.gluster.log*
>>>>>>>> *ssh_command: ssh -oPasswordAuthentication=no
>>>>>>>> -oStrictHostKeyChecking=no -i /var/lib/glusterd/geo-replication/secret.pem*
>>>>>>>> *change_detector: changelog*
>>>>>>>> *session_owner: 40e9e77a-034c-44a2-896e-59eec47e8a84*
>>>>>>>> *state_file:
>>>>>>>> /var/lib/glusterd/geo-replication/glustervol0_storage-server.local_glustervol1/monitor.status*
>>>>>>>> *gluster_params: aux-gfid-mount acl*
>>>>>>>> *log_rsync_performance: true*
>>>>>>>> *remote_gsyncd: /nonexistent/gsyncd*
>>>>>>>> *working_dir:
>>>>>>>> /var/lib/misc/glusterfsd/glustervol0/ssh%3A%2F%2Froot%40storage-server.local%3Agluster%3A%2F%2F127.0.0.1%3Aglustervol1*
>>>>>>>> *state_detail_file:
>>>>>>>> /var/lib/glusterd/geo-replication/glustervol0_storage-server.local_glustervol1/ssh%3A%2F%2Froot%40storage-server.local%3Agluster%3A%2F%2F127.0.0.1%3Aglustervol1-detail.status*
>>>>>>>> *gluster_command_dir: /usr/sbin/*
>>>>>>>> *pid_file:
>>>>>>>> /var/lib/glusterd/geo-replication/glustervol0_storage-server.local_glustervol1/monitor.pid*
>>>>>>>> *georep_session_working_dir:
>>>>>>>> /var/lib/glusterd/geo-replication/glustervol0_storage-server.local_glustervol1/*
>>>>>>>> *ssh_command_tar: ssh -oPasswordAuthentication=no
>>>>>>>> -oStrictHostKeyChecking=no -i /var/lib/glusterd/geo-replication/tar_ssh.pem*
>>>>>>>> *master.stime_xattr_name:
>>>>>>>> trusted.glusterfs.40e9e77a-034c-44a2-896e-59eec47e8a84.ccfaed9b-ff4b-4a55-acfa-03f092cdf460.stime*
>>>>>>>> *changelog_log_file:
>>>>>>>> /var/log/glusterfs/geo-replication/glustervol0/ssh%3A%2F%2Froot%40storage-server.local%3Agluster%3A%2F%2F127.0.0.1%3Aglustervol1-changes.log*
>>>>>>>> *socketdir: /var/run/gluster*
>>>>>>>> *volume_id: 40e9e77a-034c-44a2-896e-59eec47e8a84*
>>>>>>>> *ignore_deletes: false*
>>>>>>>> *state_socket_unencoded:
>>>>>>>> /var/lib/glusterd/geo-replication/glustervol0_storage-server.local_glustervol1/ssh%3A%2F%2Froot%40storage-server.local%3Agluster%3A%2F%2F127.0.0.1%3Aglustervol1.socket*
>>>>>>>> *log_file:
>>>>>>>> /var/log/glusterfs/geo-replication/glustervol0/ssh%3A%2F%2Froot%40storage-server.local%3Agluster%3A%2F%2F127.0.0.1%3Aglustervol1.log*
>>>>>>>>
>>>>>>>> If any further information is required in order to troubleshoot
>>>>>>>> this issue then please let me know.
>>>>>>>>
>>>>>>>> I would be very grateful for any help or guidance received.
>>>>>>>>
>>>>>>>> Many thanks,
>>>>>>>>
>>>>>>>> Mark Betham.
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> This email may contain confidential material; unintended recipients
>>>>>>>> must not disseminate, use, or act upon any information in it. If you
>>>>>>>> received this email in error, please contact the sender and permanently
>>>>>>>> delete the email.
>>>>>>>> Performance Horizon Group Limited | Registered in England & Wales
>>>>>>>> 07188234 | Level 8, West One, Forth Banks, Newcastle upon Tyne, NE1 3PA
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> _______________________________________________
>>>>>>>> Gluster-users mailing list
>>>>>>>> Gluster-users at gluster.org
>>>>>>>> http://lists.gluster.org/mailman/listinfo/gluster-users
>>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> --
>>>>>>> Thanks and Regards,
>>>>>>> Kotresh H R
>>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> --
>>>>>> MARK BETHAM
>>>>>> Senior System Administrator
>>>>>> +44 (0) 191 261 2444
>>>>>> performancehorizon.com
>>>>>> PerformanceHorizon <https://www.facebook.com/PerformanceHorizon>
>>>>>> tweetphg <https://twitter.com/tweetphg>
>>>>>> performance-horizon-group
>>>>>> <https://www.linkedin.com/company-beta/1484320/>
>>>>>>
>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> MARK BETHAM
>>>>> Senior System Administrator
>>>>> +44 (0) 191 261 2444
>>>>> performancehorizon.com
>>>>> PerformanceHorizon <https://www.facebook.com/PerformanceHorizon>
>>>>> tweetphg <https://twitter.com/tweetphg>
>>>>> performance-horizon-group
>>>>> <https://www.linkedin.com/company-beta/1484320/>
>>>>>
>>>>>
>>>>> This email may contain confidential material; unintended recipients
>>>>> must not disseminate, use, or act upon any information in it. If you
>>>>> received this email in error, please contact the sender and permanently
>>>>> delete the email.
>>>>> Performance Horizon Group Limited | Registered in England & Wales
>>>>> 07188234 | Level 8, West One, Forth Banks, Newcastle upon Tyne, NE1 3PA
>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>> --
>>>> Thanks and Regards,
>>>> Kotresh H R
>>>>
>>>
>>>
>>>
>>> --
>>> MARK BETHAM
>>> Senior System Administrator
>>> +44 (0) 191 261 2444
>>> performancehorizon.com
>>> PerformanceHorizon <https://www.facebook.com/PerformanceHorizon>
>>> tweetphg <https://twitter.com/tweetphg>
>>> performance-horizon-group
>>> <https://www.linkedin.com/company-beta/1484320/>
>>>
>>
>>
>> --
>> MARK BETHAM
>> Senior System Administrator
>> +44 (0) 191 261 2444
>> performancehorizon.com
>> PerformanceHorizon <https://www.facebook.com/PerformanceHorizon>
>> tweetphg <https://twitter.com/tweetphg>
>> performance-horizon-group
>> <https://www.linkedin.com/company-beta/1484320/>
>>
>>
>> This email may contain confidential material; unintended recipients must
>> not disseminate, use, or act upon any information in it. If you received
>> this email in error, please contact the sender and permanently delete the
>> email.
>> Performance Horizon Group Limited | Registered in England & Wales
>> 07188234 | Level 8, West One, Forth Banks, Newcastle upon Tyne, NE1 3PA
>>
>>
>>
>
>
> --
> Thanks and Regards,
> Kotresh H R
>


-- 
MARK BETHAM
Senior System Administrator
+44 (0) 191 261 2444
performancehorizon.com
PerformanceHorizon <https://www.facebook.com/PerformanceHorizon>
tweetphg <https://twitter.com/tweetphg>
performance-horizon-group <https://www.linkedin.com/company-beta/1484320/>

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