Re: Heal flapping between Possibly undergoing heal and In split brain

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Sure:

brick1:
————————————————————————————————————————————————————————————
————————————————————————————————————————————————————————————
sudo getfattr -d -m . -e hex /data/data-cluster/dms/final_archive/41be9ff5ec05c4b1c989c6053e709e59
getfattr: Removing leading '/' from absolute path names
# file: data/data-cluster/dms/final_archive/41be9ff5ec05c4b1c989c6053e709e59
trusted.gfid=0xe358ff34504241d387efe1e76eb28bb0
trusted.glusterfs.dht=0x000000010000000000000000ffffffff
trusted.glusterfs.dht.mds=0x00000000

sudo getfattr -d -m . -e hex /data/data-cluster/dms/final_archive/5543982fab4b56060aa09f667a8ae617
getfattr: Removing leading '/' from absolute path names
# file: data/data-cluster/dms/final_archive/5543982fab4b56060aa09f667a8ae617
trusted.gfid=0x33585a577c4a4c55b39b9abc07eacff1
trusted.glusterfs.dht=0x000000010000000000000000ffffffff
trusted.glusterfs.dht.mds=0x00000000

sudo getfattr -d -m . -e hex /data/data-cluster/dms/final_archive/a8b7f31775eebc8d1867e7f9de7b6eaf
getfattr: Removing leading '/' from absolute path names
# file: data/data-cluster/dms/final_archive/a8b7f31775eebc8d1867e7f9de7b6eaf
trusted.gfid=0x99cdfe0773d74d7ab29592ce40cf47f3
trusted.glusterfs.dht=0x000000010000000000000000ffffffff
trusted.glusterfs.dht.mds=0x00000000

sudo getfattr -d -m . -e hex /data/data-cluster/dms/final_archive/c1d3f3c2d7ae90e891e671e2f20d5d4b
getfattr: Removing leading '/' from absolute path names
# file: data/data-cluster/dms/final_archive/c1d3f3c2d7ae90e891e671e2f20d5d4b
trusted.gfid=0x8a96a80ddf8a4163ac00bb12369389df
trusted.glusterfs.dht=0x000000010000000000000000ffffffff
trusted.glusterfs.dht.mds=0x00000000

sudo getfattr -d -m . -e hex /data/data-cluster/dms/final_archive/e5934699809a3b6dcfc5945f408b978b
getfattr: Removing leading '/' from absolute path names
# file: data/data-cluster/dms/final_archive/e5934699809a3b6dcfc5945f408b978b
trusted.gfid=0x04d087a96cc6421ca7bc356fc20d7753
trusted.glusterfs.dht=0x000000010000000000000000ffffffff
trusted.glusterfs.dht.mds=0x00000000

sudo getfattr -d -m . -e hex /data/data-cluster/dms/final_archive/e7cdc94f60d390812a5f9754885e119e
getfattr: Removing leading '/' from absolute path names
# file: data/data-cluster/dms/final_archive/e7cdc94f60d390812a5f9754885e119e
trusted.gfid=0xdee76d06204d4bd9b7652eb7a79be1a5
trusted.glusterfs.dht=0x000000010000000000000000ffffffff
trusted.glusterfs.dht.mds=0x00000000
————————————————————————————————————————————————————————————
sudo stat /data/data-cluster/dms/final_archive/41be9ff5ec05c4b1c989c6053e709e59
  File: '/data/data-cluster/dms/final_archive/41be9ff5ec05c4b1c989c6053e709e59'
  Size: 33        Blocks: 0          IO Block: 4096   directory
Device: 807h/2055d Inode: 40809094709  Links: 3
Access: (0755/drwxr-xr-x)  Uid: (   33/www-data)   Gid: (   33/www-data)
Access: 2019-03-20 11:06:26.994047597 +0100
Modify: 2019-03-20 11:28:28.294689870 +0100
Change: 2019-03-21 13:01:03.077654239 +0100
 Birth: -

sudo stat /data/data-cluster/dms/final_archive/5543982fab4b56060aa09f667a8ae617
  File: '/data/data-cluster/dms/final_archive/5543982fab4b56060aa09f667a8ae617'
  Size: 33        Blocks: 0          IO Block: 4096   directory
Device: 807h/2055d Inode: 49399908865  Links: 3
Access: (0755/drwxr-xr-x)  Uid: (   33/www-data)   Gid: (   33/www-data)
Access: 2019-03-20 11:07:20.342140927 +0100
Modify: 2019-03-20 11:28:28.318690015 +0100
Change: 2019-03-21 13:01:03.133654344 +0100
 Birth: -

sudo stat /data/data-cluster/dms/final_archive/a8b7f31775eebc8d1867e7f9de7b6eaf
  File: '/data/data-cluster/dms/final_archive/a8b7f31775eebc8d1867e7f9de7b6eaf'
  Size: 33        Blocks: 0          IO Block: 4096   directory
Device: 807h/2055d Inode: 53706303549  Links: 3
Access: (0755/drwxr-xr-x)  Uid: (   33/www-data)   Gid: (   33/www-data)
Access: 2019-03-20 11:06:55.414097315 +0100
Modify: 2019-03-20 11:28:28.362690281 +0100
Change: 2019-03-21 13:01:03.141654359 +0100
 Birth: -

sudo stat /data/data-cluster/dms/final_archive/c1d3f3c2d7ae90e891e671e2f20d5d4b
  File: '/data/data-cluster/dms/final_archive/c1d3f3c2d7ae90e891e671e2f20d5d4b'
  Size: 33        Blocks: 0          IO Block: 4096   directory
Device: 807h/2055d Inode: 57990935591  Links: 3
Access: (0755/drwxr-xr-x)  Uid: (   33/www-data)   Gid: (   33/www-data)
Access: 2019-03-20 11:07:08.558120309 +0100
Modify: 2019-03-20 11:28:14.226604869 +0100
Change: 2019-03-21 13:01:03.189654448 +0100
 Birth: -

sudo stat /data/data-cluster/dms/final_archive/e5934699809a3b6dcfc5945f408b978b
  File: '/data/data-cluster/dms/final_archive/e5934699809a3b6dcfc5945f408b978b'
  Size: 33        Blocks: 0          IO Block: 4096   directory
Device: 807h/2055d Inode: 62291339781  Links: 3
Access: (0755/drwxr-xr-x)  Uid: (   33/www-data)   Gid: (   33/www-data)
Access: 2019-03-20 11:06:02.070003998 +0100
Modify: 2019-03-20 11:28:28.458690861 +0100
Change: 2019-03-21 13:01:03.281654621 +0100
 Birth: -

sudo stat /data/data-cluster/dms/final_archive/e7cdc94f60d390812a5f9754885e119e
  File: '/data/data-cluster/dms/final_archive/e7cdc94f60d390812a5f9754885e119e'
  Size: 33        Blocks: 0          IO Block: 4096   directory
Device: 807h/2055d Inode: 66574223479  Links: 3
Access: (0755/drwxr-xr-x)  Uid: (   33/www-data)   Gid: (   33/www-data)
Access: 2019-03-20 11:28:10.826584325 +0100
Modify: 2019-03-20 11:28:10.834584374 +0100
Change: 2019-03-20 14:06:07.937449353 +0100
 Birth: -
root@storage3:/var/log/glusterfs# 
————————————————————————————————————————————————————————————
————————————————————————————————————————————————————————————

brick2:
————————————————————————————————————————————————————————————
————————————————————————————————————————————————————————————
sudo getfattr -d -m . -e hex /data/data-cluster/dms/final_archive/e7cdc94f60d390812a5f9754885e119e
getfattr: Removing leading '/' from absolute path names
# file: data/data-cluster/dms/final_archive/e7cdc94f60d390812a5f9754885e119e
trusted.afr.dirty=0x000000000000000000000000
trusted.afr.storage2-client-0=0x000000000000000000000000
trusted.gfid=0xdee76d06204d4bd9b7652eb7a79be1a5
trusted.glusterfs.dht=0x000000010000000000000000ffffffff
trusted.glusterfs.dht.mds=0x00000000

sudo getfattr -d -m . -e hex /data/data-cluster/dms/final_archive/5543982fab4b56060aa09f667a8ae617
getfattr: Removing leading '/' from absolute path names
# file: data/data-cluster/dms/final_archive/5543982fab4b56060aa09f667a8ae617
trusted.afr.storage2-client-0=0x000000000000000000000000
trusted.gfid=0x33585a577c4a4c55b39b9abc07eacff1
trusted.glusterfs.dht=0x000000010000000000000000ffffffff
trusted.glusterfs.dht.mds=0x00000000

sudo getfattr -d -m . -e hex /data/data-cluster/dms/final_archive/a8b7f31775eebc8d1867e7f9de7b6eaf
getfattr: Removing leading '/' from absolute path names
# file: data/data-cluster/dms/final_archive/a8b7f31775eebc8d1867e7f9de7b6eaf
trusted.afr.storage2-client-0=0x000000000000000000000000
trusted.gfid=0x99cdfe0773d74d7ab29592ce40cf47f3
trusted.glusterfs.dht=0x000000010000000000000000ffffffff
trusted.glusterfs.dht.mds=0x00000000

sudo getfattr -d -m . -e hex /data/data-cluster/dms/final_archive/c1d3f3c2d7ae90e891e671e2f20d5d4b
getfattr: Removing leading '/' from absolute path names
# file: data/data-cluster/dms/final_archive/c1d3f3c2d7ae90e891e671e2f20d5d4b
trusted.afr.storage2-client-0=0x000000000000000000000000
trusted.gfid=0x8a96a80ddf8a4163ac00bb12369389df
trusted.glusterfs.dht=0x000000010000000000000000ffffffff
trusted.glusterfs.dht.mds=0x00000000

sudo getfattr -d -m . -e hex /data/data-cluster/dms/final_archive/e5934699809a3b6dcfc5945f408b978b
getfattr: Removing leading '/' from absolute path names
# file: data/data-cluster/dms/final_archive/e5934699809a3b6dcfc5945f408b978b
trusted.afr.storage2-client-0=0x000000000000000000000000
trusted.gfid=0x04d087a96cc6421ca7bc356fc20d7753
trusted.glusterfs.dht=0x000000010000000000000000ffffffff
trusted.glusterfs.dht.mds=0x00000000

sudo getfattr -d -m . -e hex /data/data-cluster/dms/final_archive/e7cdc94f60d390812a5f9754885e119e
getfattr: Removing leading '/' from absolute path names
# file: data/data-cluster/dms/final_archive/e7cdc94f60d390812a5f9754885e119e
trusted.afr.dirty=0x000000000000000000000000
trusted.afr.storage2-client-0=0x000000000000000000000000
trusted.gfid=0xdee76d06204d4bd9b7652eb7a79be1a5
trusted.glusterfs.dht=0x000000010000000000000000ffffffff
trusted.glusterfs.dht.mds=0x00000000

————————————————————————————————————————————————————————————

sudo stat /data/data-cluster/dms/final_archive/41be9ff5ec05c4b1c989c6053e709e59
  File: '/data/data-cluster/dms/final_archive/41be9ff5ec05c4b1c989c6053e709e59'
  Size: 33        Blocks: 0          IO Block: 4096   directory
Device: 807h/2055d Inode: 42232631305  Links: 3
Access: (0755/drwxr-xr-x)  Uid: (   33/www-data)   Gid: (   33/www-data)
Access: 2019-03-20 11:06:26.994047597 +0100
Modify: 2019-03-20 11:28:28.294689870 +0100
Change: 2019-03-21 13:01:03.078748131 +0100
 Birth: -

sudo stat /data/data-cluster/dms/final_archive/5543982fab4b56060aa09f667a8ae617
  File: '/data/data-cluster/dms/final_archive/5543982fab4b56060aa09f667a8ae617'
  Size: 33        Blocks: 0          IO Block: 4096   directory
Device: 807h/2055d Inode: 78589109305  Links: 3
Access: (0755/drwxr-xr-x)  Uid: (   33/www-data)   Gid: (   33/www-data)
Access: 2019-03-20 11:07:20.342140927 +0100
Modify: 2019-03-20 11:28:28.318690015 +0100
Change: 2019-03-21 13:01:03.134748477 +0100
 Birth: -

sudo stat /data/data-cluster/dms/final_archive/a8b7f31775eebc8d1867e7f9de7b6eaf
  File: '/data/data-cluster/dms/final_archive/a8b7f31775eebc8d1867e7f9de7b6eaf'
  Size: 33        Blocks: 0          IO Block: 4096   directory
Device: 807h/2055d Inode: 54972096517  Links: 3
Access: (0755/drwxr-xr-x)  Uid: (   33/www-data)   Gid: (   33/www-data)
Access: 2019-03-20 11:06:55.414097315 +0100
Modify: 2019-03-20 11:28:28.362690281 +0100
Change: 2019-03-21 13:01:03.162748650 +0100
 Birth: -

sudo stat /data/data-cluster/dms/final_archive/c1d3f3c2d7ae90e891e671e2f20d5d4b
  File: '/data/data-cluster/dms/final_archive/c1d3f3c2d7ae90e891e671e2f20d5d4b'
  Size: 33        Blocks: 0          IO Block: 4096   directory
Device: 807h/2055d Inode: 40821259275  Links: 3
Access: (0755/drwxr-xr-x)  Uid: (   33/www-data)   Gid: (   33/www-data)
Access: 2019-03-20 11:07:08.558120309 +0100
Modify: 2019-03-20 11:28:14.226604869 +0100
Change: 2019-03-21 13:01:03.194748848 +0100
 Birth: -

sudo stat /data/data-cluster/dms/final_archive/e5934699809a3b6dcfc5945f408b978b
  File: '/data/data-cluster/dms/final_archive/e5934699809a3b6dcfc5945f408b978b'
  Size: 33        Blocks: 0          IO Block: 4096   directory
Device: 807h/2055d Inode: 15876654    Links: 3
Access: (0755/drwxr-xr-x)  Uid: (   33/www-data)   Gid: (   33/www-data)
Access: 2019-03-20 11:06:02.070003998 +0100
Modify: 2019-03-20 11:28:28.458690861 +0100
Change: 2019-03-21 13:01:03.282749392 +0100
 Birth: -

sudo stat /data/data-cluster/dms/final_archive/e7cdc94f60d390812a5f9754885e119e
  File: '/data/data-cluster/dms/final_archive/e7cdc94f60d390812a5f9754885e119e'
  Size: 33        Blocks: 0          IO Block: 4096   directory
Device: 807h/2055d Inode: 49408944650  Links: 3
Access: (0755/drwxr-xr-x)  Uid: (   33/www-data)   Gid: (   33/www-data)
Access: 2019-03-20 11:28:10.826584325 +0100
Modify: 2019-03-20 11:28:10.834584374 +0100
Change: 2019-03-20 14:06:07.940849268 +0100
 Birth: -
————————————————————————————————————————————————————————————
————————————————————————————————————————————————————————————

Attachment: glfsheal-storage2.log
Description: Binary data

The file is from brick 2 that I upgraded and started the heal on.


- Kindest regards,

Milos Cuculovic
IT Manager

---
MDPI AG
Postfach, CH-4020 Basel, Switzerland
Office: St. Alban-Anlage 66, 4052 Basel, Switzerland
Tel. +41 61 683 77 35
Fax +41 61 302 89 18
Email: cuculovic@xxxxxxxx
Skype: milos.cuculovic.mdpi

Disclaimer: The information and files contained in this message are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this message in error, please notify me and delete this message from your system. You may not copy this message in its entirety or in part, or disclose its contents to anyone.

On 21 Mar 2019, at 13:05, Karthik Subrahmanya <ksubrahm@xxxxxxxxxx> wrote:

Can you give me the stat & getfattr output of all those 6 entries from both the bricks and the glfsheal-<volname>.log file from the node where you run this command?
Meanwhile can you also try running this with the source-brick option?

On Thu, Mar 21, 2019 at 5:22 PM Milos Cuculovic <cuculovic@xxxxxxxx> wrote:
Thank you Karthik,

I have run this for all files (see example below) and it says the file is not in split-brain:

sudo gluster volume heal storage2 split-brain latest-mtime  /dms/final_archive/41be9ff5ec05c4b1c989c6053e709e59
Healing /dms/final_archive/41be9ff5ec05c4b1c989c6053e709e59 failed: File not in split-brain.
Volume heal failed.


- Kindest regards,

Milos Cuculovic
IT Manager

---
MDPI AG
Postfach, CH-4020 Basel, Switzerland
Office: St. Alban-Anlage 66, 4052 Basel, Switzerland
Tel. +41 61 683 77 35
Fax +41 61 302 89 18
Email: cuculovic@xxxxxxxx
Skype: milos.cuculovic.mdpi

Disclaimer: The information and files contained in this message are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this message in error, please notify me and delete this message from your system. You may not copy this message in its entirety or in part, or disclose its contents to anyone.

On 21 Mar 2019, at 12:36, Karthik Subrahmanya <ksubrahm@xxxxxxxxxx> wrote:

Hi Milos,

Thanks for the logs and the getfattr output.
From the logs I can see that there are 6 entries under the directory "/data/data-cluster/dms/final_archive" named
41be9ff5ec05c4b1c989c6053e709e59
5543982fab4b56060aa09f667a8ae617
a8b7f31775eebc8d1867e7f9de7b6eaf
c1d3f3c2d7ae90e891e671e2f20d5d4b
e5934699809a3b6dcfc5945f408b978b
e7cdc94f60d390812a5f9754885e119e
which are having gfid mismatch, so the heal is failing on this directory.

You can use the CLI option to resolve these files from gfid mismatch. You can use any of the 3 methods available:
1. bigger-file
gluster volume heal <VOLNAME> split-brain bigger-file <FILE>

2. latest-mtime
gluster volume heal <VOLNAME> split-brain latest-mtime <FILE>

3. source-brick
gluster volume heal <VOLNAME> split-brain source-brick <HOSTNAME:BRICKNAME> <FILE>

where <FILE> must be absolute path w.r.t. the volume, starting with '/'.
If all those entries are directories then go for either latest-mtime/source-brick option.
After you resolve all these gfid-mismatches, run the "gluster volume heal <volname>" command. Then check the heal info and let me know the result.

Regards,
Karthik

On Thu, Mar 21, 2019 at 4:27 PM Milos Cuculovic <cuculovic@xxxxxxxx> wrote:
Sure, thank you for following up.

About the commands, here is what I see:

brick1:
—————————————————————————————————————
sudo gluster volume heal storage2 info
Brick storage3:/data/data-cluster
<gfid:256ca960-1601-4f0d-9b08-905c6fd52326> 
<gfid:7a63a729-c48f-4a00-9040-c3e2a0710ae6> 
/dms/final_archive - Possibly undergoing heal

Status: Connected
Number of entries: 3

Brick storage4:/data/data-cluster
<gfid:276fec9a-1c9b-4efe-9715-dcf4207e99b0> 
/dms/final_archive - Possibly undergoing heal

Status: Connected
Number of entries: 2
—————————————————————————————————————
sudo getfattr -d -m . -e hex /data/data-cluster/dms/final_archive
getfattr: Removing leading '/' from absolute path names
# file: data/data-cluster/dms/final_archive
trusted.afr.dirty=0x000000000000000000000000
trusted.afr.storage2-client-1=0x000000000000000000000010
trusted.gfid=0x16c6a1e2b3fe4851972b998980097a87
trusted.glusterfs.dht=0x000000010000000000000000ffffffff
trusted.glusterfs.dht.mds=0x00000000
—————————————————————————————————————
stat /data/data-cluster/dms/final_archive
  File: '/data/data-cluster/dms/final_archive'
  Size: 3497984   Blocks: 8768       IO Block: 4096   directory
Device: 807h/2055d Inode: 26427748396  Links: 72123
Access: (0755/drwxr-xr-x)  Uid: (   33/www-data)   Gid: (   33/www-data)
Access: 2018-10-09 04:22:40.514629044 +0200
Modify: 2019-03-21 11:55:37.382278863 +0100
Change: 2019-03-21 11:55:37.382278863 +0100
 Birth: -
—————————————————————————————————————
—————————————————————————————————————

brick2:
—————————————————————————————————————
sudo gluster volume heal storage2 info
Brick storage3:/data/data-cluster
<gfid:256ca960-1601-4f0d-9b08-905c6fd52326> 
<gfid:7a63a729-c48f-4a00-9040-c3e2a0710ae6> 
/dms/final_archive - Possibly undergoing heal

Status: Connected
Number of entries: 3

Brick storage4:/data/data-cluster
<gfid:276fec9a-1c9b-4efe-9715-dcf4207e99b0> 
/dms/final_archive - Possibly undergoing heal

Status: Connected
Number of entries: 2
—————————————————————————————————————
sudo getfattr -d -m . -e hex /data/data-cluster/dms/final_archive
getfattr: Removing leading '/' from absolute path names
# file: data/data-cluster/dms/final_archive
trusted.afr.dirty=0x000000000000000000000000
trusted.afr.storage2-client-0=0x000000000000000000000001
trusted.gfid=0x16c6a1e2b3fe4851972b998980097a87
trusted.glusterfs.dht=0x000000010000000000000000ffffffff
trusted.glusterfs.dht.mds=0x00000000
—————————————————————————————————————
stat /data/data-cluster/dms/final_archive
  File: '/data/data-cluster/dms/final_archive'
  Size: 3497984   Blocks: 8760       IO Block: 4096   directory
Device: 807h/2055d Inode: 13563551265  Links: 72124
Access: (0755/drwxr-xr-x)  Uid: (   33/www-data)   Gid: (   33/www-data)
Access: 2018-10-09 04:22:40.514629044 +0200
Modify: 2019-03-21 11:55:46.382565124 +0100
Change: 2019-03-21 11:55:46.382565124 +0100
 Birth: -
—————————————————————————————————————

Hope this helps.

- Kindest regards,

Milos Cuculovic
IT Manager

---
MDPI AG
Postfach, CH-4020 Basel, Switzerland
Office: St. Alban-Anlage 66, 4052 Basel, Switzerland
Tel. +41 61 683 77 35
Fax +41 61 302 89 18
Email: cuculovic@xxxxxxxx
Skype: milos.cuculovic.mdpi

Disclaimer: The information and files contained in this message are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this message in error, please notify me and delete this message from your system. You may not copy this message in its entirety or in part, or disclose its contents to anyone.

On 21 Mar 2019, at 11:43, Karthik Subrahmanya <ksubrahm@xxxxxxxxxx> wrote:

Can you attach the "glustershd.log"  file which will be present under "/var/log/glusterfs/" from both the nodes and the "stat" & "getfattr -d -m . -e hex <file-path-on-brick>" output of all the entries listed in the heal info output from both the bricks?

On Thu, Mar 21, 2019 at 3:54 PM Milos Cuculovic <cuculovic@xxxxxxxx> wrote:
Thanks Karthik!

I was trying to find some resolution methods from [2] but unfortunately none worked (I can explain what I tried if needed).

I guess the volume you are talking about is of type replica-2 (1x2).
That’s correct, aware of the arbiter solution but still didn’t took time to implement.

From the info results I posted, how to know in which situation I am. No files are mentioned in spit brain, only directories. One brick has 3 entries and one two entries.

sudo gluster volume heal storage2 info
[sudo] password for sshadmin: 
Brick storage3:/data/data-cluster
<gfid:256ca960-1601-4f0d-9b08-905c6fd52326> 
<gfid:7a63a729-c48f-4a00-9040-c3e2a0710ae6> 
/dms/final_archive - Possibly undergoing heal

Status: Connected
Number of entries: 3

Brick storage4:/data/data-cluster
<gfid:276fec9a-1c9b-4efe-9715-dcf4207e99b0> 
/dms/final_archive - Possibly undergoing heal

Status: Connected
Number of entries: 2

- Kindest regards,

Milos Cuculovic
IT Manager

---
MDPI AG
Postfach, CH-4020 Basel, Switzerland
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On 21 Mar 2019, at 10:27, Karthik Subrahmanya <ksubrahm@xxxxxxxxxx> wrote:

Hi,

Note: I guess the volume you are talking about is of type replica-2 (1x2). Usually replica 2 volumes are prone to split-brain. If you can consider converting them to arbiter or replica-3, they will handle most of the cases which can lead to slit-brains. For more information see [1].

Resolving the split-brain: [2] talks about how to interpret the heal info output and different ways to resolve them using the CLI/manually/using the favorite-child-policy.
If you are having entry split brain, and is a gfid split-brain (file/dir having different gfids on the replica bricks) then you can use the CLI option to resolve them. If a directory is in gfid split-brain in a distributed-replicate volume and you are using the source-brick option please make sure you use the brick of this subvolume, which has the same gfid as that of the other distribute subvolume(s) where you have the correct gfid, as the source.
If you are having a type mismatch then follow the steps in [3] to resolve the split-brain.


HTH,
Karthik

On Thu, Mar 21, 2019 at 1:45 PM Milos Cuculovic <cuculovic@xxxxxxxx> wrote:
I was now able to catch the split brain log:

sudo gluster volume heal storage2 info
Brick storage3:/data/data-cluster
<gfid:256ca960-1601-4f0d-9b08-905c6fd52326> 
<gfid:7a63a729-c48f-4a00-9040-c3e2a0710ae6> 
/dms/final_archive - Is in split-brain

Status: Connected
Number of entries: 3

Brick storage4:/data/data-cluster
<gfid:276fec9a-1c9b-4efe-9715-dcf4207e99b0> 
/dms/final_archive - Is in split-brain

Status: Connected
Number of entries: 2

Milos

On 21 Mar 2019, at 09:07, Milos Cuculovic <cuculovic@xxxxxxxx> wrote:

Since 24h, after upgrading from 4.0 to 4.1.7 one of the servers, the heal shows this:

sudo gluster volume heal storage2 info
Brick storage3:/data/data-cluster
<gfid:256ca960-1601-4f0d-9b08-905c6fd52326>
<gfid:7a63a729-c48f-4a00-9040-c3e2a0710ae6>
/dms/final_archive - Possibly undergoing heal

Status: Connected
Number of entries: 3

Brick storage4:/data/data-cluster
<gfid:276fec9a-1c9b-4efe-9715-dcf4207e99b0>
/dms/final_archive - Possibly undergoing heal

Status: Connected
Number of entries: 2

The same files stay there. From time to time the status of the /dms/final_archive is in split brain at the following command shows:

sudo gluster volume heal storage2 info split-brain
Brick storage3:/data/data-cluster
/dms/final_archive
Status: Connected
Number of entries in split-brain: 1

Brick storage4:/data/data-cluster
/dms/final_archive
Status: Connected
Number of entries in split-brain: 1

How to know the file who is in split brain? The files in /dms/final_archive are not very important, fine to remove (ideally resolve the split brain) for the ones that differ.

I can only see the directory and GFID. Any idea on how to resolve this situation as I would like to continue with the upgrade on the 2nd server, and for this the heal needs to be done with 0 entries in sudo gluster volume heal storage2 info

Thank you in advance, Milos.

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