Hari Sekhon created SOLR-7400:
---------------------------------
Summary: Collection creation fails when over-provisioning
maxShardsPerNode > 1
Key: SOLR-7400
URL: https://issues.apache.org/jira/browse/SOLR-7400
Project: Solr
Issue Type: Bug
Components: SolrCloud
Affects Versions: 4.10.3
Environment: HDP 2.2 / HDP Search
Reporter: Hari Sekhon
When trying to overprovision shards I've encountered an issue before where the
additional shards are trying to use the same dataDir resulting in failure to
obtain locks for those additional shard replicas:
{code}curl
'http://host:8983/solr/admin/collections?action=CREATE&name=test&numShards=6&maxShardsPerNode=6&replicationFactor=2&wt=json&indent=true'
{
"responseHeader":{
"status":0,
"QTime":3925},
"failure":{
"":"org.apache.solr.client.solrj.impl.HttpSolrServer$RemoteSolrException:Error
CREATEing SolrCore 'test_shard1_replica2': Unable to create core
[test_shard1_replica2] Caused by: Lock obtain timed out:
NativeFSLock@/data1/solr/test/index/write.lock",
"":"org.apache.solr.client.solrj.impl.HttpSolrServer$RemoteSolrException:Error
CREATEing SolrCore 'test_shard6_replica1': Unable to create core
[test_shard6_replica1] Caused by: Lock obtain timed out:
NativeFSLock@/data1/solr/test/index/write.lock",
"":"org.apache.solr.client.solrj.impl.HttpSolrServer$RemoteSolrException:Error
CREATEing SolrCore 'test_shard5_replica2': Unable to create core
[test_shard5_replica2] Caused by: Lock obtain timed out:
NativeFSLock@/data1/solr/test/index/write.lock",
"":"org.apache.solr.client.solrj.impl.HttpSolrServer$RemoteSolrException:Error
CREATEing SolrCore 'test_shard2_replica1': Unable to create core
[test_shard2_replica1] Caused by: Lock obtain timed out:
NativeFSLock@/data1/solr/test/index/write.lock",
"":"org.apache.solr.client.solrj.impl.HttpSolrServer$RemoteSolrException:Error
CREATEing SolrCore 'test_shard3_replica2': Unable to create core
[test_shard3_replica2] Caused by: Lock obtain timed out:
NativeFSLock@/data1/solr/test/index/write.lock",
"":"org.apache.solr.client.solrj.impl.HttpSolrServer$RemoteSolrException:Error
CREATEing SolrCore 'test_shard4_replica1': Unable to create core
[test_shard4_replica1] Caused by: Lock obtain timed out:
NativeFSLock@/data1/solr/test/index/write.lock"},
"success":{
"":{
"responseHeader":{
"status":0,
"QTime":3225},
"core":"test_shard5_replica1"},
"":{
"responseHeader":{
"status":0,
"QTime":3234},
"core":"test_shard6_replica2"},
"":{
"responseHeader":{
"status":0,
"QTime":3248},
"core":"test_shard1_replica1"},
"":{
"responseHeader":{
"status":0,
"QTime":3433},
"core":"test_shard4_replica2"},
"":{
"responseHeader":{
"status":0,
"QTime":3620},
"core":"test_shard3_replica1"},
"":{
"responseHeader":{
"status":0,
"QTime":3800},
"core":"test_shard2_replica2"}}}
{code}
It's not clear given this how you could have more than one shard per node to
pre-provision for anticipated node growth.
Hari Sekhon
http://www.linkedin.com/in/harisekhon
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