Cao Manh Dat created SOLR-12166:
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Summary: Race condition in rejoinElection and registering replica
Key: SOLR-12166
URL: https://issues.apache.org/jira/browse/SOLR-12166
Project: Solr
Issue Type: Bug
Security Level: Public (Default Security Level. Issues are Public)
Reporter: Cao Manh Dat
Assignee: Cao Manh Dat
I found this case when beasting LIROnShardRestartTest, the case here is
* ReplicaA may be the new leader - try and sync with other replicas and
somehow failed to become the leader (ex: LIR flag).
* ReplicaA call rejoinElection, therefore, starting the recovery process
* After rejoinElection, it somehow wins the election (ex: all replicas
participated in the election, therefore LIR flag is cleared).
* ReplicaA register itself as ACTIVE after winning the election
* The recovery process above publish ReplicaA to DOWN or RECOVERY
* We end up with a dead-end shard with a DOWN leader, hence other replicas
can't do recovery with replicaA
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