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From "Aleksey Yeschenko (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (CASSANDRA-9328) WriteTimeoutException thrown when LWT concurrency > 1, despite the query duration taking MUCH less than cas_contention_timeout_in_ms
Date Fri, 30 Oct 2015 16:21:28 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-9328?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Aleksey Yeschenko updated CASSANDRA-9328:
-----------------------------------------
    Priority: Major  (was: Critical)

> WriteTimeoutException thrown when LWT concurrency > 1, despite the query duration
taking MUCH less than cas_contention_timeout_in_ms
> ------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: CASSANDRA-9328
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-9328
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Coordination
>            Reporter: Aaron Whiteside
>             Fix For: 2.1.x
>
>         Attachments: CassandraLWTTest.java, CassandraLWTTest2.java
>
>
> WriteTimeoutException thrown when LWT concurrency > 1, despite the query duration
taking MUCH less than cas_contention_timeout_in_ms.
> Unit test attached, run against a 3 node cluster running 2.1.5.
> If you reduce the threadCount to 1, you never see a WriteTimeoutException. If the WTE
is due to not being able to communicate with other nodes, why does the concurrency >1 cause
inter-node communication to fail?



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