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https://issues.apache.org/jira/browse/CASSANDRA-15158?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Vincent White updated CASSANDRA-15158:
--------------------------------------
Severity: Normal
Discovered By: User Report
Bug Category: Parent values: Correctness(12982)Level 1 values: Consistency
Failure(12989)
Since Version: 3.1
> Wait for schema agreement rather then in flight schema requests when
> bootstrapping
> ----------------------------------------------------------------------------------
>
> Key: CASSANDRA-15158
> URL: https://issues.apache.org/jira/browse/CASSANDRA-15158
> Project: Cassandra
> Issue Type: Bug
> Components: Cluster/Gossip
> Reporter: Vincent White
> Priority: Normal
>
> Currently when a node is bootstrapping we use a set of latches
> (org.apache.cassandra.service.MigrationTask#inflightTasks) to keep track of
> in-flight schema pull requests, and we don't proceed with
> bootstrapping/stream until all the latches are released (or we timeout
> waiting for each one). One issue with this is that if we have a large schema,
> or the retrieval of the schema from the other nodes was unexpectedly slow
> then we have no explicit check in place to ensure we have actually received a
> schema before we proceed.
> While it's possible to increase "migration_task_wait_in_seconds" to force the
> node to wait on each latches longer, there are cases where this doesn't help
> because the callbacks for the schema pull requests have expired off the
> messaging service's callback map
> (org.apache.cassandra.net.MessagingService#callbacks) after
> getMinRpcTimeout() (2 seconds by default) before the other nodes were able to
> respond to the new node.
> This patch checks for schema agreement between the bootstrapping node and the
> rest of the live nodes before proceeding with bootstrapping. It also adds a
> check to prevent the new node from flooding existing nodes with simultaneous
> schema pull requests as can happen in large clusters.
> |||3.11||
> |[PoC|https://github.com/apache/cassandra/compare/cassandra-3.11...vincewhite:check_for_schema]|
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