[SOLR-13884] Concurrent collection creation leads to multiple replicas placed on same node

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 8.6
• Assignee: Andrzej Bialecki
• Reporter: Yonik Seeley
• Created: 30/Oct/19 19:06
• Updated: 21/Oct/20 11:37
• Resolved: 24/Mar/20 09:55

Description

When multiple collection creations are done concurrently with a collection-level policy, multiple replicas of a single shard can end up on the same node, violating the specified policy.

This was observed on both 8.2 and master.

Issue Links

• is related to: SOLR-10822 Concurrent execution of Policy computations should yield correct result
• is related to: SOLR-13891 Default replica placement is random
• is related to: SOLR-14347 Autoscaling placement wrong when concurrent replica placements are calculated
• links to: GitHub Pull Request #987