Bug 1277479 - crush: straw2: divide by 0 when weight is 0
Summary: crush: straw2: divide by 0 when weight is 0
Keywords:
Status: CLOSED NOTABUG
Alias: None
Product: Red Hat Ceph Storage
Classification: Red Hat Storage
Component: RBD
Version: 1.3.0
Hardware: x86_64
OS: Linux
unspecified
high
Target Milestone: rc
: 1.3.2
Assignee: Josh Durgin
QA Contact: ceph-qe-bugs
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2015-11-03 12:40 UTC by Benjamin Schmaus
Modified: 2019-08-15 05:47 UTC (History)
6 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2015-11-03 17:58:22 UTC
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Ceph Project Bug Tracker 11357 0 None None None Never

Description Benjamin Schmaus 2015-11-03 12:40:56 UTC 
Description of problem:

Client is seeing the following issue with nova instances:

crush: straw2: divide by 0 when weight is 0

Client uses Ubuntu for OpenStack and RHEL7 with Ceph 1.3.

Believed to be the following upstream bug:

http://tracker.ceph.com/issues/11357


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


How reproducible:
100%

Steps to Reproduce:
1.
2.
3.

Actual results:
Instance should launch

Expected results:
Instance fails w/ error:  on MON Nov  3 00:26:01 ndc-003-022 kernel: [1566825.894236] libceph: mon1 172.16.151.16:6789 feature set mismatch, my 2b84a042a42 < server's 102b84a042a42, missing 100000000

Additional info:

Upstream bug appears to be committed in code:

git tag --contains b5921d55
v0.94.1
v0.94.1.2
v0.94.1.3
v0.94.1.4
v0.94.1.5
v0.94.1.6
v0.94.1.7
v0.94.2
v0.94.3
Comment 4 Benjamin Schmaus 2015-11-03 15:58:48 UTC 
Created attachment 1089102 [details]
tcpdump from OSP client to Mon
Comment 5 Ken Dreyer (Red Hat) 2015-11-03 16:07:29 UTC 
Jason confirmed this is a RADOS issue, not RBD-specific - adjusting sub-component to match.
Comment 6 Benjamin Schmaus 2015-11-03 17:57:46 UTC 
This is not a bug - client upgraded from firefly to hammer but never restarted instances hence not picking up new hammer libraries for qemu process.

Closing.....
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