[Bugs] [Bug 1291538] New: GlusterFS is not durable against power outage

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1291538

            Bug ID: 1291538
           Summary: GlusterFS is not durable against power outage
           Product: GlusterFS
           Version: 3.5.6
         Component: glusterd
          Assignee: bugs at gluster.org
          Reporter: ginermail at gmail.com
                CC: bugs at gluster.org, gluster-bugs at redhat.com



Description of problem:
- GlusterFS is not durable against power outage. In case of power loss it
always leads to split brain.

How reproducible:
- Always


Steps to Reproduce:
1. Create cluster: 3 nodes, 1 volume, 3 bricks, 3 replicas.
2. Mount the volume somewhere and start writing many files.
3. Switch power off for one if nodes (stop forcefully in case of virtual
machine).
4. Start the node again.
5. Run: gluster volume heal volumename full
6. Check: gluster volume heal volumename info split-brain

Actual results:
- cat: /mnt/gluster-volume/filename.log: Input/output error

Expected results:
- If we have 3 replicas and 2 of them are identical (quorum) then it should be
healed automatically and not leading to Input/output error.


Additional info:

- Check file size on all nodes:

$ ls -ln /data/glusterfs/volume/filename.log
gluster.1: -rw-r--r-- 2 106 114 9869 Dec 15 04:47
/data/glusterfs/volume/filename.log
gluster.2: -rw-r--r-- 2 106 114 10008 Dec 15 04:49
/data/glusterfs/volume/filename.log
gluster.3: -rw-r--r-- 2 106 114 10008 Dec 15 04:49
/data/glusterfs/volume/filename.log


- Get attr on all nodes:

$ getfattr -m . -d -e hex /data/glusterfs/volume/filename.log

gluster.1:  # file: /data/glusterfs/volume/filename.log
            trusted.afr.rpaas-client-21=0x000000000000000000000000
            trusted.afr.rpaas-client-22=0x000000000000000000000000
            trusted.afr.rpaas-client-23=0x000000000000000000000000
            trusted.gfid=0x21b7709eca5e481ab2b9e5d73e219b03

gluster.2:  # file: /data/glusterfs/volume/filename.log
            trusted.afr.rpaas-client-21=0x000000000000000000000000
            trusted.afr.rpaas-client-22=0x000000000000000000000000
            trusted.afr.rpaas-client-23=0x000000000000000000000000
            trusted.gfid=0x21b7709eca5e481ab2b9e5d73e219b03

gluster.3:  # file: /data/glusterfs/volume/filename.log
            trusted.afr.rpaas-client-21=0x000000000000000000000000
            trusted.afr.rpaas-client-22=0x000000000000000000000000
            trusted.afr.rpaas-client-23=0x000000000000000000000000
            trusted.gfid=0x21b7709eca5e481ab2b9e5d73e219b03

-- 
You are receiving this mail because:
You are on the CC list for the bug.
You are the assignee for the bug.