Bug 1539830

Summary:	Suppress unlogged batch warnings in Cassandra logs
Product:	OpenShift Container Platform	Reporter:	John Sanda <jsanda>
Component:	Hawkular	Assignee:	Ruben Vargas Palma <rvargasp>
Status:	CLOSED ERRATA	QA Contact:	Junqi Zhao <juzhao>
Severity:	low	Docs Contact:
Priority:	unspecified
Version:	3.7.0	CC:	aos-bugs, miburman
Target Milestone:	---
Target Release:	3.7.z
Hardware:	Unspecified
OS:	Unspecified
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Clones:	1548486 1548488 (view as bug list)		Environment:
Last Closed:	2018-04-05 09:36:18 UTC	Type:	Bug
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
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Embargoed:
Bug Depends On:
Bug Blocks:	1548486, 1548488

Description John Sanda 2018-01-29 17:10:52 UTC

Description of problem:
In OCP 3.7 changes were made in hawkular-metrics that result in lots of messages filling up Cassandra logs like this:

WARN  [SharedPool-Worker-13] 2018-01-17 18:02:36,963 NoSpamLogger.java:94 - Unlogged batch covering 12 partitions detected against table [hawkular_metrics.data_temp_2018011716]. You should use a logged batch for atomicity, or asynchronous writes for performance.

We have intentionally introduced the use of unlogged batches across multiple partitions within a single C* instance. I am seeing so many instances of these log statements some times that it makes debugging a C* pod difficult.

There is a property in cassandra.yaml, unlogged_batch_across_partitions_warn_threshold, that defaults to 10. I think we should set this property to 20 or 25. Doing so will eliminate most if not all of the warning messages.

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Comment 5 Junqi Zhao 2018-02-23 06:12:48 UTC

Tested with Dockerfile-openshift3-metrics-cassandra-v3.7.33-1,
unlogged_batch_across_partitions_warn_threshold is set to 30 now, sanity testing is passed.

Set it to VERIFIED.

Comment 9 errata-xmlrpc 2018-04-05 09:36:18 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/RHBA-2018:0636