[Gluster-users] remote operation failed [Transport endpoint is not connected]

[hsafe]

Hello,

I am stuck with failure of my gluster 2x replica heal with messages at
glustershd.log as :

*[2018-11-21 05:28:07.813003] E [MSGID: 114031]
[client-rpc-fops.c:1646:client3_3_entrylk_cbk] 0-gv1-client-0: remote
operation failed [Transport endpoint is not connected]*

When the log hits here In either of the replica nodes; I can see that my
command: *watch glsuter volume heal <my volume> statistics *returns no
more progress and status unchanged afterward. I am running glusterfs on
top of zfs and it is basically a storage for small read-only files.
There was a thread with Shyam Ranganathan and Reiner Keller in here
where the core of the problem was the storage going out of inods and no
space left error which obviously can not be my case as am on top of ZFS.
However, the similarity between us is that we were previously on 3.10
and upon various issues with that version we upgraded to 3.12 on Ubuntu
16.04 with kernel 4.4.0-116-generic.

Anybody faced issue as above?Can you advise what can be done as it is
for over a month with no effective self-heal process completed...

Here is my gluster cluster info:

*Volume Name: gv1
Type: Replicate
Volume ID: f1c955a1-7a92-4b1b-acb5-8b72b41aaace
Status: Started
Snapshot Count: 0
Number of Bricks: 1 x 2 = 2
Transport-type: tcp
Bricks:
Brick1: IMG-01:/images/storage/brick1
Brick2: IMG-02:/images/storage/brick1
Options Reconfigured:
cluster.self-heal-daemon: enable
cluster.eager-lock: off
client.event-threads: 4
performance.cache-max-file-size: 8
features.scrub: Inactive
features.bitrot: off
network.inode-lru-limit: 50000
nfs.disable: true
performance.readdir-ahead: on
server.statedump-path: /tmp
cluster.background-self-heal-count: 32
performance.md-cache-timeout: 30
cluster.readdir-optimize: on
cluster.shd-max-threads: 4
cluster.lookup-optimize: on
features.cache-invalidation: on
features.cache-invalidation-timeout: 600
performance.stat-prefetch: on
performance.cache-invalidation: on
server.event-threads: 4*

Thank you