[SOLR-7716] misleading errors reported for CREATESHARD if new shard would exceed maxShardsPerNode

• Type: Improvement
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Affects Version/s: 6.0
• Component/s: SolrCloud
• Assignee: Unassigned
• Reporter: Erick Erickson
• Created: 23/Jun/15 17:29
• Updated: 09/May/16 18:54

Description

If I create a collection with implicit routing and, say, maxShardsPerNode=3, then start creating shards, when I create the 4th shard I get an error. So far so good. The error is very misleading though, see below.

Saw this on a degenerate case of a single Solr instance, not sure if you get the same error on a multi-node cluster.

<str name="Operation createshard caused exception:">
...... Cannot create collection eoe. No live Solr-instances
</str>
<lst name="exception">
<str name="msg">Cannot create collection eoe. No live Solr-instances</str>
<int name="rspCode">400</int>
.
.
.

Related question is I don't think there's a graceful way to increase maxShardsPerNode after the collection is created.

Issue Links

• is related to: SOLR-5128 Improve SolrCloud cluster management capabilities