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From "Cao Manh Dat (JIRA)" <j...@apache.org>
Subject [jira] [Created] (SOLR-13416) Overseer node getting stuck
Date Mon, 22 Apr 2019 08:25:00 GMT
Cao Manh Dat created SOLR-13416:
-----------------------------------

             Summary: Overseer node getting stuck
                 Key: SOLR-13416
                 URL: https://issues.apache.org/jira/browse/SOLR-13416
             Project: Solr
          Issue Type: Bug
      Security Level: Public (Default Security Level. Issues are Public)
    Affects Versions: 7.2.1
            Reporter: Cao Manh Dat
            Assignee: Cao Manh Dat


There is a problem privately reported to me about stucking of Overseer, leading to no operations
get being processed until a new Overseer node being elected. 
There is an exception was logged
{code}
WARN - 2019-03-11 10:11:34.879; org.apache.solr.cloud.LockTree$Node; lock_is_leaked at[item-xref-secondary-stage]
ERROR - 2019-03-11 10:11:35.002; org.apache.solr.common.SolrException; Collection: item-xref-secondary-stage
operation: delete failed:org.apache.solr.common.SolrException: Could not find collection :
item-xref-secondary-stage
at org.apache.solr.common.cloud.ClusterState.getCollection(ClusterState.java:111)
at org.apache.solr.cloud.OverseerCollectionMessageHandler.collectionCmd(OverseerCollectionMessageHandler.java:795)
at org.apache.solr.cloud.DeleteCollectionCmd.call(DeleteCollectionCmd.java:91)
at org.apache.solr.cloud.OverseerCollectionMessageHandler.processMessage(OverseerCollectionMessageHandler.java:233)
at org.apache.solr.cloud.OverseerTaskProcessor$Runner.run(OverseerTaskProcessor.java:464)
at org.apache.solr.common.util.ExecutorUtil$MDCAwareThreadPoolExecutor.lambda$execute$0(ExecutorUtil.java:188)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
{code}

This is a serious problem since it can leads to hanging of whole system. 



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