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@xxxxxxxxxx> wrote:
Kotresh HRThanks,Hi Mark,Sorry, I was busy and could not take a serious look at the logs. I can update you on Monday.On Wed, Jun 20, 2018 at 12:32 PM, Mark Betham <mark.betham@xxxxxxxxxxxxxxxxxxxxxx> 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 BethamOn Mon, 11 Jun 2018 at 08:24, Mark Betham <mark.betham@xxxxxxxxxxxxxxxxxxxxxx> 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@xxxxxxxxxx> wrote:Kotresh HRThanks,Hi Mark,Google drive works for me.On Fri, Jun 8, 2018 at 3:00 PM, Mark Betham <mark.betham@xxxxxxxxxxxxxxxxxxxxxx> 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 listeningI 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 BethamOn 7 June 2018 at 08:19, Mark Betham <mark.betham@xxxxxxxxxxxxxxxxxxxxxx> 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 3.12.9Repository revision: git://git.gluster.org/glusterfs.gitCopyright (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 LesserGeneral Public License, version 3 or any later version (LGPLv3or 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_64glusterfs-gnfs-3.12.9-1.el7.x86_64glusterfs-libs-3.12.9-1.el7.x86_64glusterfs-server-3.12.9-1.el7.x86_64glusterfs-3.12.9-1.el7.x86_64glusterfs-api-3.12.9-1.el7.x86_64glusterfs-events-3.12.9-1.el7.x86_64centos-release-gluster312-1.0-1.el7.centos.noarchglusterfs-client-xlators-3.12.9-1.el7.x86_64glusterfs-cli-3.12.9-1.el7.x86_64python2-gluster-3.12.9-1.el7.x86_64glusterfs-rdma-3.12.9-1.el7.x86_64glusterfs-fuse-3.12.9-1.el7.x86_64I 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 BethamOn 7 June 2018 at 04:42, Kotresh Hiremath Ravishankar <khiremat@xxxxxxxxxx> wrote:Kotresh HR2. Please upload the complete geo-rep logs from both master and slave.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?Hi Mark,Few questions.3. Are the gluster versions same across master and slave?Thanks,On Wed, Jun 6, 2018 at 7:10 PM, Mark Betham <mark.betham@xxxxxxxxxxxxxxxxxxxxxx> 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 twraptf(*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_loopself.q.put(recv(self.inf))File "/usr/libexec/glusterfs/python/syncdaemon/repce.py", line 61, in recvreturn 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 workerres = getattr(self.obj, rmeth)(*in_data[2:])TypeError: getattr(): attribute name must be stringFrom 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: partialgluster_log_file: /var/log/glusterfs/geo-replication/glustervol0/ssh%3A%2F%2Froot%40storage-server.local%3Agluster%3A%2F%2F127.0.0.1%3Aglustervol1.gluster.logssh_command: ssh -oPasswordAuthentication=no -oStrictHostKeyChecking=no -i /var/lib/glusterd/geo-replication/secret.pemchange_detector: changelogsession_owner: 40e9e77a-034c-44a2-896e-59eec47e8a84state_file: /var/lib/glusterd/geo-replication/glustervol0_storage-server.local_glustervol1/monitor.statusgluster_params: aux-gfid-mount acllog_rsync_performance: trueremote_gsyncd: /nonexistent/gsyncdworking_dir: /var/lib/misc/glusterfsd/glustervol0/ssh%3A%2F%2Froot%40storage-server.local%3Agluster%3A%2F%2F127.0.0.1%3Aglustervol1state_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.statusgluster_command_dir: /usr/sbin/pid_file: /var/lib/glusterd/geo-replication/glustervol0_storage-server.local_glustervol1/monitor.pidgeorep_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.pemmaster.stime_xattr_name: trusted.glusterfs.40e9e77a-034c-44a2-896e-59eec47e8a84.ccfaed9b-ff4b-4a55-acfa-03f092cdf460.stimechangelog_log_file: /var/log/glusterfs/geo-replication/glustervol0/ssh%3A%2F%2Froot%40storage-server.local%3Agluster%3A%2F%2F127.0.0.1%3Aglustervol1-changes.logsocketdir: /var/run/glustervolume_id: 40e9e77a-034c-44a2-896e-59eec47e8a84ignore_deletes: falsestate_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.socketlog_file: /var/log/glusterfs/geo-replication/glustervol0/ssh%3A%2F%2Froot%40storage-server.local%3Agluster%3A%2F%2F127.0.0.1%3Aglustervol1.logIf 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.
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