Shalin Shekhar Mangar created SOLR-7503:
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Summary: Recovery after ZK session expiration happens in a single
thread for all cores in a node
Key: SOLR-7503
URL: https://issues.apache.org/jira/browse/SOLR-7503
Project: Solr
Issue Type: Bug
Components: SolrCloud
Affects Versions: 5.1
Reporter: Shalin Shekhar Mangar
Fix For: Trunk, 5.2
Currently cores are registered in parallel in an executor. However, when
there's a ZK expiration, the recovery, which also happens in the register call,
happens in a single thread:
https://github.com/apache/lucene-solr/blob/trunk/solr/core/src/java/org/apache/solr/cloud/ZkController.java#L300
We should make these happen in parallel as well so that recovery after ZK
expiration doesn't take forever.
Thanks to [~mewmewball] for catching this.
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