[
https://issues.apache.org/jira/browse/CASSANDRA-7886?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14175064#comment-14175064
]
Sylvain Lebresne commented on CASSANDRA-7886:
---------------------------------------------
bq. The Exceptions I added were internal ones.
What I meant is that you added a new error code. This can't be done in existing
protocol versions as it will break clients. We'd need to only return this code
in the upcoming v4 protocol (CASSANDRA-8043), document such change in the
protocol v4 spec, and return an existing code for other versions of the
protocol. And for old version of the protocol and thrift, I think we should
return an timeout exception, not an unavailable one since that's what we return
now.
> 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
> Assignee: Christian Spriegel
> Priority: Minor
> Fix For: 3.0
>
> Attachments: 7886_v1.txt
>
>
> *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 (sooner or later)
> 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.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
