[Bugs] [Bug 1278399] I/O failure on attaching tier on nfs client

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1278399

Jiffin <jthottan at redhat.com> changed:

           What    |Removed                     |Added
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                 CC|                            |jthottan at redhat.com



--- Comment #8 from Jiffin <jthottan at redhat.com> ---
Adding certain points to Rafi's comment.

The issue is reproduced in non-tier distributed replicated volume while a
add-brick happens. Most of time I/O hangs(say 90 reproducible). And also I got
"invalidate error on the mount" twice (one in tier and another non tier volume)

After discussing with Niels, he suggested me run the same test with reducing
epoll threads to one. When I ran with epoll thread=1 , then out of four run ,
only one hangs in non tier distributed replicated volume. (But issue still
exists)

As mentioned in Rafi's comment when we restart the nfs-server again, it resumes
gracefully.

I suspect mount hang on client may be related to nfs issue, but "invalidate
error" may be related to some other component.

And one more thing, issue is reproduced consistently(I mean hung) in my setup
due to the low system(hardware) configuration.

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