[SOLR-6598] Solr Collections API, case sensitivity of collection name and core's/replica's instance directory

• Type: Bug
• Status: Open
• Priority: Trivial
• Resolution: Unresolved
• Affects Version/s: 4.10.1
• Component/s: SolrCloud

Environment

Mac OS X

• Assignee: Unassigned
• Reporter: Alexey Serba
• Created: 07/Oct/14 11:53
• Updated: 02/Nov/14 05:46

Description

Solr Collections API returns misleading error when trying to create two collections with the same name but with different case on MacOS file system (which is case insensitive).

sh> curl 'http://localhost:8983/solr/admin/collections?action=CREATE&name=test&numShards=1&collection.configName=default&indent=true&wt=json'

{
  "responseHeader":{
    "status":0,
    "QTime":1949},
  "success":{
    "":{
      "responseHeader":{
        "status":0,
        "QTime":1833},
      "core":"test_shard1_replica1"}}}

sh> curl 'http://localhost:8983/solr/admin/collections?action=CREATE&name=TEST&numShards=1&collection.configName=default&indent=true&wt=json'

{
  "responseHeader":{
    "status":0,
    "QTime":2509},
  "failure":{
    "":"org.apache.solr.client.solrj.impl.HttpSolrServer$RemoteSolrException:Error CREATEing SolrCore 'TEST_shard1_replica1': Unable to create core [TEST_shard1_replica1] Caused by: Lock obtain timed out: NativeFSLock@/Users/alexey/Desktop/solr-4.10.1/node1/solr/test_shard1_replica1/data/index/write.lock"}}

See Lock obtain timed out exception. It will be more user friendly to check existence of instance dir test_shard1_replica1 and return something like "Node A has replica B that uses the same index directory" exception (instead of just trying to hijack that existing directory and then propagating the inexplicable lock exception that arises as a result).

Issue Links

• relates to: SOLR-6478 need docs / tests of the "rules" as far as collection names go