Jay Zhuang created CASSANDRA-15097:
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Summary: Avoid updating unchanged gossip state
Key: CASSANDRA-15097
URL: https://issues.apache.org/jira/browse/CASSANDRA-15097
Project: Cassandra
Issue Type: Bug
Components: Cluster/Gossip
Reporter: Jay Zhuang
Assignee: Jay Zhuang
The node might get unchanged gossip states, the state might be just updated
after sending a GOSSIP_SYN, then it will get the state that is already up to
date. If the heartbeat in the GOSSIP_ACK message is updated, it will
unnecessary re-apply the same state again, which could be costly like updating
token change.
It's very likely to happen for large cluster when a node startup, as the first
gossip message will sync all endpoints tokens, it could take some time (in our
case about 200 seconds), during that time, it keeps gossip with other node and
get the full token states. Which causes lots of pending gossip tasks.
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