[SOLR-8722] Don't force a full ZkStateReader refresh on every Overseer operation

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 5.4.1
• Fix Version/s: 6.1, 7.0
• Component/s: SolrCloud
• Labels: patch performance solrcloud
• Assignee: Shalin Shekhar Mangar
• Reporter: Scott Blum
• Created: 23/Feb/16 18:29
• Updated: 02/Oct/19 17:23
• Resolved: 03/Mar/16 12:56

Description

We're doing an unnecessary ZkStateReader forced refresh on all Overseer operations. This isn't necessary because ZkStateReader keeps itself up to date.

According to shalinmangar's analysis, we just need to put a wait loop at the end of addReplica to observe the state change.

Issue Links

• is a clone of: SOLR-8696 Start the Overseer before actions that need the overseer on init and when reconnecting after zk expiration and improve init logic.