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From "Stefania (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-10938) test_bulk_round_trip_blogposts is failing occasionally
Date Wed, 30 Dec 2015 10:40:49 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-10938?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15074920#comment-15074920
] 

Stefania commented on CASSANDRA-10938:
--------------------------------------

The CPU hotspot is caused by LOGGED batching, specifically by {{StorageProxy.getBatchlogEndpoints()}},
see screenshot attached: _6452.png_.

LOGGED batching was introduced after reintroducing batch-by-replica. After switching back
to UNLOGGED batching, and keeping batch-by-replica, I've run the same test 11 times (once
after rebooting the machine) and I could not reproduce the issue any longer. 

Let's keep on monitoring on Jenkins though.

> test_bulk_round_trip_blogposts is failing occasionally
> ------------------------------------------------------
>
>                 Key: CASSANDRA-10938
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-10938
>             Project: Cassandra
>          Issue Type: Sub-task
>          Components: Tools
>            Reporter: Stefania
>            Assignee: Stefania
>             Fix For: 2.1.x
>
>         Attachments: 6452.png, node1_debug.log, node2_debug.log, node3_debug.log
>
>
> We get timeouts occasionally that cause the number of records to be incorrect:
> http://cassci.datastax.com/job/trunk_dtest/858/testReport/cqlsh_tests.cqlsh_copy_tests/CqlshCopyTest/test_bulk_round_trip_blogposts/



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