[Bugs] [Bug 1774011] New: Heal Info is hung when I/O is in progress on a gluster block volume

bugzilla at redhat.com bugzilla at redhat.com
Tue Nov 19 12:38:15 UTC 2019


            Bug ID: 1774011
           Summary: Heal Info is hung when I/O is in progress on a gluster
                    block volume
           Product: GlusterFS
           Version: mainline
            Status: NEW
         Component: replicate
          Assignee: bugs at gluster.org
          Reporter: ravishankar at redhat.com
                CC: bugs at gluster.org
  Target Milestone: ---
    Classification: Community

This bug was initially created as a copy of Bug #1721355

I am copying this bug because: 
I'd like to send a patch against it.

Description of problem:
I was observing this issue while working on BZ 1707259. 
When there is no self-heals pending, but there are a lot of I/Os happening on a
replicate volume with gluster block profile enabled, heal-info was hung. The
moment I/O stopped, the command completed successfully. I'm guessing it has
something to do with eager locking but I need to RCA it.

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

How reproducible:
Always on my dev VMs.

Steps to Reproduce:
- Create a 1x3 replica volume (3 node setup)
- Apply  gluster-block profile on the volume. (gluster v set $volname group
- Mount a fuse client on another node and run parallel 'dd's :
for i in seq{1..20}; do dd if=/dev/urandom of=FILE_$i bs=1024 count=102400&
- After 10-20 seconds while the I/O is going on, run heal-info command - It
will be hung.

Actual results:
heal info command is hung

Expected results:
It should not be hung.

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