[SOLR-5739] SPLITSHARD creates shards "...Ignoring commit while not ACTIVE"

• Type: Bug
• Status: Closed
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 4.6.1
• Fix Version/s: 4.7, 6.0
• Component/s: SolrCloud

Environment

Windows 7 64 bit, Debian 3.11.1

• Assignee: Shalin Shekhar Mangar
• Reporter: Günther Ruck
• Created: 17/Feb/14 15:03
• Updated: 09/May/16 18:50
• Resolved: 18/Feb/14 00:43

Description

I've tried to use the SPLITSHARD command from the Solr collection-Api.
A JUnit test successfully runs before the split, but fails after splitting the shard, stopping and restarting Solr. It won't fail if Solr isn't restarted after splitting.

I found some entries in files "solr.log" and "core.properties" which may give hints.

After split:

org.apache.solr.update.UpdateLog; Starting to buffer updates. FSUpdateLog{state=ACTIVE, tlog=null
is logged for both newly created shards in "solr.log"

"clusterstate.json" from Solr Cloud admin page shows:
shard1 state: inactive (replica: active)
shard1_0 state: active parent shard1 (replica active)
shard1_1 state: active parent shard1 (replica active)

Both "core.properties" files of the newly created shards have
shardState=construction and shardParent=shard1
entries.
The "core.properties" file of the parent shard is not changed.

When restarting Solr

and running the JUnit again these entries are logged:
org.apache.solr.update.processor.DistributedUpdateProcessor; Ignoring commit while not ACTIVE - state: BUFFERING replay:0
in "solr.log"

I mainly I followed the steps of this tutorial http://architects.dzone.com/articles/solr-43-shard-splitting-quick.

1. (install solr-4.6.1)
2. create a small cluster:
   java -Dbootstrap_confdir=./solr/portalse/conf -Dcollection.configName=portalse -DzkRun -DnumShards=1 -DmaxShardsPerNode=2 -DreplicationFactor=1 -jar start.jar
3. Run the unit test (after termination only one document exists).
4. Split the only shard:
   curl 'http://localhost:8983/solr/admin/collections?action=SPLITSHARD&collection=portalse&shard=shard1'
   shard "collection1_shard1_0_replica1" created (1 document)
   shard "collection1_shard1_1_replica1" created (0 documents)
5. commit index:
   curl 'http://localhost:8983/solr/portalse/update' --data-binary '<commit/>' -H 'Content-type:application/xml'
6. stop Solr by pressing Ctl-C.
7. restart Solr:
   java -DzkRun -jar start.jar
8. Run the unit test from step 2 again.