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From "sankalp kohli (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-8595) Emit timeouts per endpoint
Date Tue, 10 Feb 2015 19:16:12 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-8595?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14314711#comment-14314711
] 

sankalp kohli commented on CASSANDRA-8595:
------------------------------------------

During reads, we block on a latch to count the number of responses. You need to do some code
changes to figure out which endpoint did not reply. You also need to account for speculative
retry. 
You can start from SP.fetchRows method to see how reads happen. 

> Emit timeouts per endpoint
> --------------------------
>
>                 Key: CASSANDRA-8595
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-8595
>             Project: Cassandra
>          Issue Type: Improvement
>            Reporter: sankalp kohli
>            Priority: Minor
>
> We currently emit number of timeouts experienced by a co-ordinator while doing reads
and writes. This does not tell us which replica or endpoint is responsible for the timeouts.

> We can keep a map of endpoint to number of timeouts which could be emitted via JMX.



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