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Posted to commits@cassandra.apache.org by "Jay Zhuang (JIRA)" <ji...@apache.org> on 2019/05/24 17:30:00 UTC

[jira] [Created] (CASSANDRA-15141) RemoveNode takes long time and blocks gossip stage

Jay Zhuang created CASSANDRA-15141:
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             Summary: RemoveNode takes long time and blocks gossip stage
                 Key: CASSANDRA-15141
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-15141
             Project: Cassandra
          Issue Type: Improvement
          Components: Cluster/Gossip, Cluster/Membership
            Reporter: Jay Zhuang
            Assignee: Jay Zhuang


This function [{{getAddressReplicas()}}|https://github.com/apache/cassandra/blob/7df67eff2d66dba4bed2b4f6aeabf05144d9b057/src/java/org/apache/cassandra/service/StorageService.java#L3002] during removenode and decommission is slow for large vnode cluster with NetworkTopologyStrategy. As it needs to build whole replications map for every token range.
In one of our cluster (> 1k nodes), it takes about 20 seconds for each NetworkTopologyStrategy keyspace, so the total time to process a removenode message takes at least 80 seconds (20 * 4: 3 system keyspaces, 1 user keyspace). It blocks the heartbeat propagation and causes false down node.



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