CLI should loop on describe_schema until agreement of fatel exit with
stacktrace/message if no agreement after X seconds
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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
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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