[jira] [Commented] (CASSANDRA-5025) Schema push/pull race

["Pavel S. (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CASSANDRA-5025?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15764515#comment-15764515 ] 

Pavel S. commented on CASSANDRA-5025:
-------------------------------------

Hi,

Looks like that the issue has not been resolved. 

I've just got this:

{code}
15:52:40.194 [cluster1-nio-worker-1] WARN  c.d.driver.core.RequestHandler - /127.0.0.1:9042 replied with server error (java.lang.RuntimeException: java.util.concurrent.ExecutionException: org.apache.cassandra.exceptions.ConfigurationException: Column family ID mismatch (found 5230d9a0-c6cc-11e6-9ece-6d2c86545d91; expected 51d06a20-c6cc-11e6-9ece-6d2c86545d91)), defuncting connection.
{code}

On C* 3.9:

{code}
[cqlsh 5.0.1 | Cassandra 3.9 | CQL spec 3.4.2 | Native protocol v4]
Use HELP for help.
cqlsh>
{code}

with latest driver: "com.datastax.cassandra" % "cassandra-driver-core" % "3.1.2"}}}

> Schema push/pull race
> ---------------------
>
>                 Key: CASSANDRA-5025
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-5025
>             Project: Cassandra
>          Issue Type: Bug
>    Affects Versions: 1.1.0
>            Reporter: Jonathan Ellis
>            Assignee: Jonathan Ellis
>            Priority: Minor
>             Fix For: 1.1.8
>
>         Attachments: 5025-v2.txt, 5025-v3.txt, 5025-v4.txt, 5025-v5.txt, 5025.txt
>
>
> When a schema change is made, the coordinator pushes the delta to the other nodes in the cluster.  This is more efficient than sending the entire schema.  But the coordinator also announces the new schema version, so the other nodes' reception of the new version races with processing the delta, and usually seeing the new schema wins.  So the other nodes also issue a pull to the coordinator for the entire schema.
> Thus, schema changes tend to become O(n) in the number of KS and CF present.



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