[Bugs] [Bug 1201203] New: glusterd OOM killed, when repeating volume set operation in a loop

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1201203

            Bug ID: 1201203
           Summary: glusterd OOM killed, when repeating volume set
                    operation in a loop
           Product: GlusterFS
           Version: mainline
         Component: core
          Severity: high
          Assignee: bugs at gluster.org
          Reporter: amukherj at redhat.com
                CC: bugs at gluster.org, gluster-bugs at redhat.com,
                    nlevinki at redhat.com, rhs-bugs at redhat.com,
                    sasundar at redhat.com, vbellur at redhat.com
        Depends On: 1198968



+++ This bug was initially created as a clone of Bug #1198968 +++

Description of problem:
-----------------------
While repeating volume set operation in the loop, glusterd gets OOM killed

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

How reproducible:
-----------------
Consistent

Steps to Reproduce:
-------------------
1. Create a 2 node 'Trusted Storage Pool' ( cluster )
2. Create 2 distribute volumes with 2 bricks ( 1 brick per node ) and start it
3. From NODE1, in one loop, keep repeating 'volume set' on one volume (say
vol1)
4. Frome NODE2, in other loop, keep repeating 'volume set' on other volume (
say vol2 )

Actual results:
---------------
After an hour, glusterd got OOM killed.

Expected results:
-----------------
glusterd should get OOM Killed

--- Additional comment from SATHEESARAN on 2015-03-05 04:10:11 EST ---

glusterd statedump file while the memory consumption was high enough.
This was taken 10 minutes before glusterd got OOM Killed

--- Additional comment from SATHEESARAN on 2015-03-05 04:12:52 EST ---

sosreport as taken from NODE1, where the glusterd got OOM killed

--- Additional comment from SATHEESARAN on 2015-03-05 04:16:54 EST ---

Reproducible test case1 :
--------------------------
0. Create a 2 node cluster
1. Create a distribute volume and start it.
2. Create a shell script as follows :
while true; do gluster volume set <vol-name1> read-ahead on; done
3. Run the above script in the background.
4. From RHSS command line execute the following,
while true; do gluster volume set <vol-name2> write-behind on; done
5. Monitor the memory consumed by glusterd


Referenced Bugs:

https://bugzilla.redhat.com/show_bug.cgi?id=1198968
[Bug 1198968] glusterd OOM killed, when repeating volume set operation in a
loop
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