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From "Aleksey Yeschenko (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-12236) RTE from new CDC column breaks in flight queries.
Date Tue, 02 Aug 2016 15:17:20 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-12236?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15404164#comment-15404164
] 

Aleksey Yeschenko commented on CASSANDRA-12236:
-----------------------------------------------

bq. Not sure to follow that one

My eyes failed me, never mind.

bq.  I did got a run of upgrade test to finish previously and there was still 72 failures.


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).

> 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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