You are viewing a plain text version of this content. The canonical link for it is here.
Posted to commits@cassandra.apache.org by "Sam Tunnicliffe (JIRA)" <ji...@apache.org> on 2017/11/07 16:14:00 UTC
[jira] [Updated] (CASSANDRA-13964) Tracing interferes with digest
requests when using RandomPartitioner
[ https://issues.apache.org/jira/browse/CASSANDRA-13964?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Sam Tunnicliffe updated CASSANDRA-13964:
----------------------------------------
Resolution: Fixed
Fix Version/s: 4.0
3.11.2
3.0.16
Reproduced In: 3.11.1, 3.0.15, 4.0 (was: 3.0.15, 3.11.1, 4.0)
Status: Resolved (was: Patch Available)
The CI was generally good barring a couple of flaky-ish tests which I've checked are passing locally, so I've committed to 3.0 in {{58daf1376456289f97f0ef0b0daf9e0d03ba6b81}} and merged to 3.11 and trunk.
> Tracing interferes with digest requests when using RandomPartitioner
> --------------------------------------------------------------------
>
> Key: CASSANDRA-13964
> URL: https://issues.apache.org/jira/browse/CASSANDRA-13964
> Project: Cassandra
> Issue Type: Bug
> Components: Local Write-Read Paths, Observability
> Reporter: Sam Tunnicliffe
> Assignee: Sam Tunnicliffe
> Fix For: 3.0.16, 3.11.2, 4.0
>
>
> A {{ThreadLocal<MessageDigest>}} is used to generate the MD5 digest when a replica serves a read command and the {{isDigestQuery}} flag is set. The same threadlocal is also used by {{RandomPartitioner}} to decorate partition keys. So in a cluster with RP, if tracing is enabled the data digest is corrupted by the partitioner making tokens for the tracing mutations. This causes a digest mismatch on the coordinator, triggering a full data read on every read where CL > 1 (or speculative execution/read repair kick in).
--
This message was sent by Atlassian JIRA
(v6.4.14#64029)
---------------------------------------------------------------------
To unsubscribe, e-mail: commits-unsubscribe@cassandra.apache.org
For additional commands, e-mail: commits-help@cassandra.apache.org