Hi,
I’ve got an odd problem where I’m unable to create a collection as it’s 
claiming a lock is held at /solr/solr-data/data/tech-data-001/index/write.lock, 
but that location (/solr/solr-data/data/tech-data-001) doesn’t exist on any of 
the nodes on the cluster.

Does anyone know what might be causing this?

Thanks
Karl



18:52:17.366 
[OverseerThreadFactory-80-thread-5-processing-n:solr-8.search-solr.svc.cluster.local:80_solr]
 ERROR org.apache.solr.cloud.api.collections.OverseerCollectionMessageHandler - 
Error from shard solr-0.search-solr.svc.cluster.local:80_solr: 
{responseHeader={status=0,QTime=0},STATUS=failed,Response=Error CREATEing 
SolrCore 'tech-data-001_shard1_replica_n6': Unable to create core 
[tech-data-001_shard1_replica_n6] Caused by: Lock held by this virtual machine: 
/solr/solr-data/data/tech-data-001/index/write.lock}
18:52:18.381 
[OverseerThreadFactory-80-thread-5-processing-n:solr-8.search-solr.svc.cluster.local:80_solr]
 ERROR org.apache.solr.cloud.api.collections.OverseerCollectionMessageHandler - 
Cleaning up collection [tech-data-001].
18:52:18.520 [Finalizer] ERROR org.apache.solr.update.SolrIndexWriter - 
SolrIndexWriter was not closed prior to finalize(), indicates a bug -- POSSIBLE 
RESOURCE LEAK!!!
18:52:18.520 [Finalizer] ERROR org.apache.solr.update.SolrIndexWriter - Error 
closing IndexWriter
java.lang.NullPointerException: null
                at 
org.apache.lucene.index.IndexWriter.doFlush(IndexWriter.java:3927) 
~[lucene-core-8.8.1.jar:8.8.1 64f3b496bfee762a9d2dbff40700f457f4464dfe - tjp - 
2021-02-16 15:47:53]
                at 
org.apache.lucene.index.IndexWriter.flush(IndexWriter.java:3887) 
~[lucene-core-8.8.1.jar:8.8.1 64f3b496bfee762a9d2dbff40700f457f4464dfe - tjp - 
2021-02-16 15:47:53]
                at 
org.apache.lucene.index.IndexWriter.shutdown(IndexWriter.java:1235) 
~[lucene-core-8.8.1.jar:8.8.1 64f3b496bfee762a9d2dbff40700f457f4464dfe - tjp - 
2021-02-16 15:47:53]
                at 
org.apache.lucene.index.IndexWriter.close(IndexWriter.java:1278) 
~[lucene-core-8.8.1.jar:8.8.1 64f3b496bfee762a9d2dbff40700f457f4464dfe - tjp - 
2021-02-16 15:47:53]
                at 
org.apache.solr.update.SolrIndexWriter.close(SolrIndexWriter.java:298) 
[solr-core-8.8.1.jar:8.8.1 64f3b496bfee762a9d2dbff40700f457f4464dfe - tjp - 
2021-02-16 15:52:02]
                at 
org.apache.solr.update.SolrIndexWriter.finalize(SolrIndexWriter.java:357) 
[solr-core-8.8.1.jar:8.8.1 64f3b496bfee762a9d2dbff40700f457f4464dfe - tjp - 
2021-02-16 15:52:02]
                at java.lang.System$2.invokeFinalize(System.java:2125) [?:?]
                at java.lang.ref.Finalizer.runFinalizer(Finalizer.java:87) [?:?]
                at 
java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:171) [?:?]
                Suppressed: java.lang.NullPointerException
                                at 
org.apache.lucene.index.IndexWriter.rollbackInternalNoCommit(IndexWriter.java:2435)
 ~[lucene-core-8.8.1.jar:8.8.1 64f3b496bfee762a9d2dbff40700f457f4464dfe - tjp - 
2021-02-16 15:47:53]
                                at 
org.apache.lucene.index.IndexWriter.rollbackInternal(IndexWriter.java:2410) 
~[lucene-core-8.8.1.jar:8.8.1 64f3b496bfee762a9d2dbff40700f457f4464dfe - tjp - 
2021-02-16 15:47:53]
                                at 
org.apache.lucene.index.IndexWriter.shutdown(IndexWriter.java:1241) 
~[lucene-core-8.8.1.jar:8.8.1 64f3b496bfee762a9d2dbff40700f457f4464dfe - tjp - 
2021-02-16 15:47:53]
                                at 
org.apache.lucene.index.IndexWriter.close(IndexWriter.java:1278) 
~[lucene-core-8.8.1.jar:8.8.1 64f3b496bfee762a9d2dbff40700f457f4464dfe - tjp - 
2021-02-16 15:47:53]
                                at 
org.apache.solr.update.SolrIndexWriter.close(SolrIndexWriter.java:298) 
[solr-core-8.8.1.jar:8.8.1 64f3b496bfee762a9d2dbff40700f457f4464dfe - tjp - 
2021-02-16 15:52:02]
                                at 
org.apache.solr.update.SolrIndexWriter.finalize(SolrIndexWriter.java:357) 
[solr-core-8.8.1.jar:8.8.1 64f3b496bfee762a9d2dbff40700f457f4464dfe - tjp - 
2021-02-16 15:52:02]
                                at 
java.lang.System$2.invokeFinalize(System.java:2125) [?:?]
                                at 
java.lang.ref.Finalizer.runFinalizer(Finalizer.java:87) [?:?]
                                at 
java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:171) [?:?]
18:52:18.561 
[OverseerThreadFactory-80-thread-5-processing-n:solr-8.search-solr.svc.cluster.local:80_solr]
 ERROR org.apache.solr.cloud.api.collections.OverseerCollectionMessageHandler - 
Collection: tech-data-001 operation: create 
failed:org.apache.solr.common.SolrException: Underlying core creation failed 
while creating collection: tech-data-001
                at 
org.apache.solr.cloud.api.collections.CreateCollectionCmd.call(CreateCollectionCmd.java:371)
                at 
org.apache.solr.cloud.api.collections.OverseerCollectionMessageHandler.processMessage(OverseerCollectionMessageHandler.java:266)
                at 
org.apache.solr.cloud.OverseerTaskProcessor$Runner.run(OverseerTaskProcessor.java:524)
                at 
org.apache.solr.common.util.ExecutorUtil$MDCAwareThreadPoolExecutor.lambda$execute$0(ExecutorUtil.java:218)
                at 
java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
                at 
java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
                at java.base/java.lang.Thread.run(Thread.java:834)

18:56:03.371 
[OverseerThreadFactory-80-thread-5-processing-n:solr-8.search-solr.svc.cluster.local:80_solr]
 ERROR org.apache.solr.cloud.api.collections.OverseerCollectionMessageHandler - 
Error from shard: http://solr-0.search-solr.svc.cluster.local:80/solr
org.apache.solr.client.solrj.impl.HttpSolrClient$RemoteSolrException: Error 
from server at http://solr-0.search-solr.svc.cluster.local:80/solr: Error 
CREATEing SolrCore 'tech-data-001_shard1_replica_n1': Unable to create core 
[tech-data-001_shard1_replica_n1] Caused by: Lock held by this virtual machine: 
/solr/solr-data/data/tech-data-001/index/write.lock
                at 
org.apache.solr.client.solrj.impl.HttpSolrClient.executeMethod(HttpSolrClient.java:681)
 ~[solr-solrj-8.8.1.jar:8.8.1 64f3b496bfee762a9d2dbff40700f457f4464dfe - tjp - 
2021-02-16 15:52:04]
                at 
org.apache.solr.client.solrj.impl.HttpSolrClient.request(HttpSolrClient.java:266)
 ~[solr-solrj-8.8.1.jar:8.8.1 64f3b496bfee762a9d2dbff40700f457f4464dfe - tjp - 
2021-02-16 15:52:04]
                at 
org.apache.solr.client.solrj.impl.HttpSolrClient.request(HttpSolrClient.java:248)
 ~[solr-solrj-8.8.1.jar:8.8.1 64f3b496bfee762a9d2dbff40700f457f4464dfe - tjp - 
2021-02-16 15:52:04]
                at 
org.apache.solr.client.solrj.SolrClient.request(SolrClient.java:1290) 
~[solr-solrj-8.8.1.jar:8.8.1 64f3b496bfee762a9d2dbff40700f457f4464dfe - tjp - 
2021-02-16 15:52:04]
                at 
org.apache.solr.handler.component.HttpShardHandlerFactory$1.request(HttpShardHandlerFactory.java:169)
 ~[solr-core-8.8.1.jar:8.8.1 64f3b496bfee762a9d2dbff40700f457f4464dfe - tjp - 
2021-02-16 15:52:02]
                at 
org.apache.solr.handler.component.ShardRequestor.call(ShardRequestor.java:130) 
~[solr-core-8.8.1.jar:8.8.1 64f3b496bfee762a9d2dbff40700f457f4464dfe - tjp - 
2021-02-16 15:52:02]
                at 
org.apache.solr.handler.component.ShardRequestor.call(ShardRequestor.java:41) 
~[solr-core-8.8.1.jar:8.8.1 64f3b496bfee762a9d2dbff40700f457f4464dfe - tjp - 
2021-02-16 15:52:02]
                at java.util.concurrent.FutureTask.run(FutureTask.java:264) 
~[?:?]
                at 
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515) ~[?:?]
                at java.util.concurrent.FutureTask.run(FutureTask.java:264) 
~[?:?]
                at 
com.codahale.metrics.InstrumentedExecutorService$InstrumentedRunnable.run(InstrumentedExecutorService.java:180)
 ~[metrics-core-4.1.5.jar:4.1.5]
                at 
org.apache.solr.common.util.ExecutorUtil$MDCAwareThreadPoolExecutor.lambda$execute$0(ExecutorUtil.java:218)
 ~[solr-solrj-8.8.1.jar:8.8.1 64f3b496bfee762a9d2dbff40700f457f4464dfe - tjp - 
2021-02-16 15:52:04]
                at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) 
[?:?]
                at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) 
[?:?]
                at java.lang.Thread.run(Thread.java:834) [?:?]
18:56:03.372 
[OverseerThreadFactory-80-thread-5-processing-n:solr-8.search-solr.svc.cluster.local:80_solr]
 ERROR org.apache.solr.cloud.api.collections.OverseerCollectionMessageHandler - 
Cleaning up collection [tech-data-001].
18:56:03.499 
[OverseerThreadFactory-80-thread-5-processing-n:solr-8.search-solr.svc.cluster.local:80_solr]
 ERROR org.apache.solr.cloud.api.collections.OverseerCollectionMessageHandler - 
Collection: tech-data-001 operation: create 
failed:org.apache.solr.common.SolrException: Underlying core creation failed 
while creating collection: tech-data-001
                at 
org.apache.solr.cloud.api.collections.CreateCollectionCmd.call(CreateCollectionCmd.java:371)
                at 
org.apache.solr.cloud.api.collections.OverseerCollectionMessageHandler.processMessage(OverseerCollectionMessageHandler.java:266)
                at 
org.apache.solr.cloud.OverseerTaskProcessor$Runner.run(OverseerTaskProcessor.java:524)
                at 
org.apache.solr.common.util.ExecutorUtil$MDCAwareThreadPoolExecutor.lambda$execute$0(ExecutorUtil.java:218)
                at 
java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
                at 
java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
                at java.base/java.lang.Thread.run(Thread.java:834)
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