Bug 1714814 - MDS may try trimming all of its journal at once after recovery
Summary: MDS may try trimming all of its journal at once after recovery
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Ceph Storage
Classification: Red Hat Storage
Component: CephFS
Version: 3.1
Hardware: All
OS: All
high
high
Target Milestone: rc
: 3.3
Assignee: Yan, Zheng
QA Contact: subhash
URL:
Whiteboard:
Depends On:
Blocks: 1726135
TreeView+ depends on / blocked
 
Reported: 2019-05-28 23:19 UTC by Patrick Donnelly
Modified: 2019-08-21 15:11 UTC (History)
7 users (show)

Fixed In Version: RHEL: ceph-12.2.12-22.el7cp Ubuntu: ceph_12.2.12-18redhat1
Doc Type: Bug Fix
Doc Text:
.The MDS no longer tries many log segments after restart Previously, the Ceph Metadata Server (MDS) would sometimes try many log segments after restart. The MDS would then send too many OSD requests in a short period of time which could harm the Ceph cluster. This update limits the number of log segments, and the cluster is no longer harmed.
Clone Of:
Environment:
Last Closed: 2019-08-21 15:11:09 UTC
Embargoed:


Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Ceph Project Bug Tracker 40041 0 None None None 2019-05-28 23:19:08 UTC
Red Hat Bugzilla 1713527 0 urgent CLOSED [GSS] clients not able to mount cephfs and mds stuck in up:replay 2021-08-27 22:40:18 UTC
Red Hat Product Errata RHSA-2019:2538 0 None None None 2019-08-21 15:11:26 UTC

Description Patrick Donnelly 2019-05-28 23:19:09 UTC
Description of problem:

"If mds was behind on trim before failover, the new mds may trim too many log segments at the same time, and cause unhealthy heartbeat."

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

3.1

How reproducible:

Needs synthetic test case with a lot of journal segments.

Comment 8 Yan, Zheng 2019-08-01 03:29:38 UTC
LGTM

Comment 11 errata-xmlrpc 2019-08-21 15:11:09 UTC
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHSA-2019:2538


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