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From "Christian Spriegel (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (CASSANDRA-7886) TombstoneOverwhelmingException should not wait for timeout
Date Fri, 05 Sep 2014 09:43:29 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-7886?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Christian Spriegel updated CASSANDRA-7886:
------------------------------------------
    Environment: Tested with Cassandra 2.0.8

> TombstoneOverwhelmingException should not wait for timeout
> ----------------------------------------------------------
>
>                 Key: CASSANDRA-7886
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-7886
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Core
>         Environment: Tested with Cassandra 2.0.8
>            Reporter: Christian Spriegel
>            Priority: Minor
>
> *Issue*
> When you have TombstoneOverwhelmingExceptions occuring in queries, this will cause the
query to be simply dropped on every data-node, but no response is sent back to the coordinator.
Instead the coordinator waits for the specified read_request_timeout_in_ms.
> On the application side this can cause memory issues, since the application is waiting
for the timeout interval for every request.Therefore, if our application runs into TombstoneOverwhelmingExceptions,
then our entire application cluster goes down :-(
> *Proposed solution*
> I think the data nodes should send a error message to the coordinator when they run into
a TombstoneOverwhelmingException. Then the coordinator does not have to wait for the timeout-interval.



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