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From "Joshua McKenzie (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-12236) RTE from new CDC column breaks in flight queries.
Date Wed, 03 Aug 2016 12:34:21 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-12236?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15405849#comment-15405849
] 

Joshua McKenzie commented on CASSANDRA-12236:
---------------------------------------------

bq. Absolute most of them have been failing since before CDC AFAIK, not related to this ticket,
and it will take a while to address them (likely not before 3.10).
Somewhat off-topic from this ticket proper, but do we have a good idea of what # are test-only
failures and what # represent actual problems? If actual problems, I'd expect we'd not cut
a release until we get those tests cleaned up.

> RTE from new CDC column breaks in flight queries.
> -------------------------------------------------
>
>                 Key: CASSANDRA-12236
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-12236
>             Project: Cassandra
>          Issue Type: Bug
>            Reporter: Jeremiah Jordan
>            Assignee: Sylvain Lebresne
>             Fix For: 3.8, 3.9
>
>         Attachments: 12236.txt
>
>
> This RTE is not harmless. It will cause the internode connection to break which will
cause all in flight requests between these nodes to die/timeout.
> {noformat}
>     - Due to changes in schema migration handling and the storage format after 3.0, you
will
>       see error messages such as:
>          "java.lang.RuntimeException: Unknown column cdc during deserialization"
>       in your system logs on a mixed-version cluster during upgrades. This error message
>       is harmless and due to the 3.8 nodes having cdc added to their schema tables while
>       the <3.8 nodes do not. This message should cease once all nodes are upgraded
to 3.8.
>       As always, refrain from schema changes during cluster upgrades.
> {noformat}



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