Re: [Gluster-devel] Query on healing process

[Ravishankar N <ravishankar@xxxxxxxxxx>]

On 03/14/2016 10:36 AM, ABHISHEK PALIWAL wrote:

Hi Ravishankar,

I just want to inform that this file have some different properties from other files like this is the file which having the fixed size and when there is no space in file the next data will start wrapping from the top of the file.

Means in this file we are doing the wrapping of the data as well.

So, I just want to know is this feature of file will effect gluster to identify the split-brain or xattr attributes?

Hi,
No it shouldn't matter at what offset the writes happen. The xattrs only track that the write was  missed  (and therefore a pending heal), irrespective of (offset, length).
Ravi

Regards,

Abhishek

On Fri, Mar 4, 2016 at 7:00 PM, ABHISHEK PALIWAL <abhishpaliwal@xxxxxxxxx> wrote:

On Fri, Mar 4, 2016 at 6:36 PM, Ravishankar N <ravishankar@xxxxxxxxxx> wrote:

On 03/04/2016 06:23 PM, ABHISHEK PALIWAL wrote:

Ok, just to confirm, glusterd  and other brick processes are running after this node rebooted? 
When you run the above command, you need to check /var/log/glusterfs/glfsheal-volname.log logs errros. Setting client-log-level to DEBUG would give you a more verbose message

Yes, glusterd and other brick processes running fine. I have check the  /var/log/glusterfs/glfsheal-volname.log file without the log-level= DEBUG. Here is the logs from that file

[2016-03-02 13:51:39.059440] I [MSGID: 101190] [event-epoll.c:632:event_dispatch_epoll_worker] 0-epoll: Started thread with index 1
[2016-03-02 13:51:39.072172] W [MSGID: 101012] [common-utils.c:2776:gf_get_reserved_ports] 0-glusterfs: could not open the file /proc/sys/net/ipv4/ip_local_reserved_ports for getting reserved ports info [No such file or directory]
[2016-03-02 13:51:39.072228] W [MSGID: 101081] [common-utils.c:2810:gf_process_reserved_ports] 0-glusterfs: Not able to get reserved ports, hence there is a possibility that glusterfs may consume reserved port
[2016-03-02 13:51:39.072583] E [socket.c:2278:socket_connect_finish] 0-gfapi: connection to 127.0.0.1:24007 failed (Connection refused)

Not sure why ^^ occurs. You could try flushing iptables (iptables -F), restart glusterd and run the heal info command again .

No hint from the logs? I'll try your suggestion.

[2016-03-02 13:51:39.072663] E [MSGID: 104024] [glfs-mgmt.c:738:mgmt_rpc_notify] 0-glfs-mgmt: failed to connect with remote-host: localhost (Transport endpoint is not connected) [Transport endpoint is not connected]
[2016-03-02 13:51:39.072700] I [MSGID: 104025] [glfs-mgmt.c:744:mgmt_rpc_notify] 0-glfs-mgmt: Exhausted all volfile servers [Transport endpoint is not connected]

# gluster volume heal c_glusterfs info split-brain
c_glusterfs: Not able to fetch volfile from glusterd
Volume heal failed.

And based on the your observation I understood that this is not the problem of split-brain but is there any way through which can find out the file which is not in split-brain as well as not in sync?

`gluster volume heal c_glusterfs info split-brain`  should give you files that need heal.

Sorry  I meant 'gluster volume heal c_glusterfs info' should give you the files that need heal and 'gluster volume heal c_glusterfs info split-brain' the list of files in split-brain.
The commands are detailed in https://github.com/gluster/glusterfs-specs/blob/master/done/Features/heal-info-and-split-brain-resolution.md

Yes, I have tried this as well It is also giving Number of entries : 0 means no healing is required but the file /opt/lvmdir/c2/brick/logfiles/availability/CELLO_AVAILABILITY2_LOG.xml is not in sync both of brick showing the different version of this file.

You can see it in the getfattr command outcome as well.

# getfattr -m . -d -e hex /opt/lvmdir/c2/brick/logfiles/availability/CELLO_AVAILABILITY2_LOG.xml
getfattr: Removing leading '/' from absolute path names
# file: opt/lvmdir/c2/brick/logfiles/availability/CELLO_AVAILABILITY2_LOG.xml
trusted.afr.c_glusterfs-client-0=0x000000000000000000000000
trusted.afr.c_glusterfs-client-2=0x000000000000000000000000
trusted.afr.c_glusterfs-client-4=0x000000000000000000000000
trusted.afr.c_glusterfs-client-6=0x000000000000000000000000
trusted.afr.c_glusterfs-client-8=0x000000060000000000000000 //because client8 is the latest client in our case and starting 8 digits

00000006....are saying like there is something in changelog data.

trusted.afr.dirty=0x000000000000000000000000
trusted.bit-rot.version=0x000000000000001356d86c0c000217fd
trusted.gfid=0x9f5e354ecfda40149ddce7d5ffe760ae

# lhsh 002500 getfattr -m . -d -e hex /opt/lvmdir/c2/brick/logfiles/availability/CELLO_AVAILABILITY2_LOG.xml
getfattr: Removing leading '/' from absolute path names
# file: opt/lvmdir/c2/brick/logfiles/availability/CELLO_AVAILABILITY2_LOG.xml
trusted.afr.c_glusterfs-client-1=0x000000000000000000000000 // and here we can say that there is no split brain but the file is out of sync
trusted.afr.dirty=0x000000000000000000000000
trusted.bit-rot.version=0x000000000000001156d86c290005735c
trusted.gfid=0x9f5e354ecfda40149ddce7d5ffe760ae
 

Regards,

   Abhishek

--

Regards
Abhishek Paliwal

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