Bug #5591: rbd-fuse crashes repeatedly under light load - rbd - Ceph

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Bug #5591

closed

rbd-fuse crashes repeatedly under light load

Added by Chris Clayton almost 11 years ago. Updated about 5 years ago.

Status:

Won't Fix

Priority:

Low

Assignee:

Target version:

% Done:

Source:

other

Tags:

Backport:

Regression:

Severity:

3 - minor

Reviewed:

Affected Versions:

ceph-qa-suite:

Pull request ID:

Crash signature (v1):

Crash signature (v2):

Description

The rbd-fuse client crashes when I do any kind of sustained IO to its devices (as little as 10 IOPS) for more than a few minutes.

This is a repeatable issue.

This particular host is running Redhat Linux 2.6.32-220.28.1.el6.x86_6.

/var/log messages shows the same error (segfault at 0 . . . . error 4 in libc-2.12.so) each time the rbd-ceph client crashes. I cannot find a core dump anywhere for rbd-fuse.

Jul 10 08:30:58 e8a5-dl585g7-01 kernel: rbd-fuse³⁷⁶²⁰: segfault at 0 ip 0000003fd347f116 sp 00007f8ace7f8bc8 error 4 in libc-2.12.so[3fd3400000+189000]

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Updated by Chris Clayton almost 11 years ago

In case it is important, I am running an io generator against 20 * 1024MB RBD images in parallel, made available to the client via the rbd-fuse progamme (with very low IO - as little as 1 IOPS can cause the crash after a few minutes).

Create rbd devices in pool cac

for j in `seq 20`; do rbd create MyBlock$j --size 1024 --pool cac; done

On client

rbd-fuse -p cac /home/cc83851/rbd
ls /home/cc83851/rbd
MyBlock1 MyBlock11 MyBlock13 MyBlock15 MyBlock17 MyBlock19 MyBlock20 MyBlock4 MyBlock6 MyBlock8
MyBlock10 MyBlock12 MyBlock14 MyBlock16 MyBlock18 MyBlock2 MyBlock3 MyBlock5 MyBlock7 MyBlock9

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