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