[Bugs] [Bug 1699176] New: rebalance start command doesn't throw up error message if the command fails

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1699176

            Bug ID: 1699176
           Summary: rebalance start command doesn't throw up error message
                    if the command fails
           Product: GlusterFS
           Version: mainline
            Status: NEW
         Component: glusterd
          Assignee: bugs at gluster.org
          Reporter: srakonde at redhat.com
                CC: amukherj at redhat.com, bugs at gluster.org, pasik at iki.fi,
                    srakonde at redhat.com
        Depends On: 1683526
  Target Milestone: ---
    Classification: Community



+++ This bug was initially created as a clone of Bug #1683526 +++

Description of problem:

When a rebalance start command fails, it doesn't throw up the error message
back to CLI.

Version-Release number of selected component (if applicable):
release-6

How reproducible:
Always

Steps to Reproduce:
1. Create 1 X 1 volume, trigger rebalance start. Command fails as glusterd.log
complains about following

[2019-02-27 06:29:15.448303] E [MSGID: 106218]
[glusterd-rebalance.c:462:glusterd_rebalance_cmd_validate] 0-glusterd: Volume
test-vol5 is not a distribute type or contains only 1 brick

But CLI doesn't throw up any error messages.

Actual results:
CLI doesn't throw up an error message.

Expected results:
CLI should throw up an error message.


Additional info:

--- Additional comment from Worker Ant on 2019-04-11 18:20:42 IST ---

REVIEW: https://review.gluster.org/22547 (glusterd: display an error when
rebalance start is failed) posted (#1) for review on master by Sanju Rakonde


Referenced Bugs:

https://bugzilla.redhat.com/show_bug.cgi?id=1683526
[Bug 1683526] rebalance start command doesn't throw up error message if the
command fails
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