[SOLR-8117] Rule-based placement issue with 'cores' tag

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 5.3, 5.3.1
• Component/s: SolrCloud
• Assignee: Noble Paul
• Reporter: Ludovic Boutros
• Created: 02/Oct/15 20:41
• Updated: 05/Apr/20 13:36

Description

The rule-based placement fails on an empty node (core count = 0) with condition 'cores:<1'.

It also fails if current core number is equal to the core number in the condition - 1.

During the placement strategy process, the core counts for a node are incremented when all the rules match.

At the end of the code, an additional verification of all the conditions is done with incremented core count and therefore it fails.

I don't know why this additional verification is needed and removing it seems to fix the issue.

Issue Links

• incorporates: SOLR-12741 Nuke rule based replica placement strategy in Lucene/Solr 8.0