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https://issues.apache.org/jira/browse/CASSANDRA-2044?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Pavel Yaskevich updated CASSANDRA-2044:
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Attachment: CASSANDRA-2044.patch
I have added option "--schema-mwt" to set wait time for schema migration in
seconds from command line, if it was not set system will use node_count/2 + 1
secs or 5 secs if couldn't connect to JMX.
CLI checks node agreement on every keyspace create/drop and if nodes were not
able to agree in given wait time system will print error message "The schema
has not settled in %d seconds and further migrations are ill-advised until it
does." and exit with -1 code.
> CLI should loop on describe_schema until agreement or fatel exit with
> stacktrace/message if no agreement after X seconds
> ------------------------------------------------------------------------------------------------------------------------
>
> Key: CASSANDRA-2044
> URL: https://issues.apache.org/jira/browse/CASSANDRA-2044
> Project: Cassandra
> Issue Type: Bug
> Affects Versions: 0.7.0
> Reporter: Matthew F. Dennis
> Assignee: Pavel Yaskevich
> Fix For: 0.7.1
>
> Attachments: CASSANDRA-2044.patch
>
> Original Estimate: 4h
> Remaining Estimate: 4h
>
> see CASSANDRA-2026 for brief background.
> It's easy to enter statements into the CLI before the schema has settled,
> often causing problems where it is no longer possible to get the nodes in
> agreement about the schema without removing the system directory.
> The alleviate the most common problems with this, the CLI should issue the
> modification statement and loop on describe_schema until all nodes agree or
> until X seconds has passed. If the timeout has been exceeded, the CLI should
> exit with an error and inform the user that the schema has not settled and
> further migrations are ill-advised until it does.
> number_of_nodes/2+1 seconds seems like a decent wait time for schema
> migrations to start with.
> Bonus points for making the value configurable.
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