[SOLR-11307] AddReplicaSuggester should support collection+shard hints

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 7.1
• Component/s: AutoScaling
• Assignee: Noble Paul
• Reporter: Andrzej Bialecki
• Created: 31/Aug/17 23:30
• Updated: 17/Oct/17 11:03
• Resolved: 05/Sep/17 09:10

Description

AddReplicaSuggester currently has a buggy behavior when both Hint.COLL and Hint.SHARD are specified - multiple collection names are retrieved but only a single shard name is retrieved, which would cause invalid combinations to be tried.

Instead it should support a different hint type where multiple valid combinations of collection+shard name can be specified. This type of information will be available from events generated by SearchRateTrigger (SOLR-11072) that collects the identities of "hot" shards that need additional replicas.