Houston Putman created SOLR-18623:
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Summary: Race-condition in ConnectionManager
Key: SOLR-18623
URL: https://issues.apache.org/jira/browse/SOLR-18623
Project: Solr
Issue Type: Task
Affects Versions: 9.9
Reporter: Houston Putman
Assignee: Houston Putman
SOLR-17405 moved SyncConnected and Disconnected off the single-threaded
callback executor and onto the unbounded pool. That is what lets them be
applied out of order. Before it, they were ordered. Therefore now it's possible
to get to a state in Solr where the Zookeeper client thinks that it has
disconnected and not reconnected.
The solution is to make sure that the events that the ConnectionManager gets
are versioned (timestamped) and we only accept events > than the last event
seen.
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