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https://issues.apache.org/jira/browse/HIVE-20442?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16904053#comment-16904053
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Rajkumar Singh commented on HIVE-20442:
---------------------------------------
the test timed out seems unrelated but uploading a fresh patch for a clean run.
> Hive stale lock when the hiveserver2 background thread died with NPE
> --------------------------------------------------------------------
>
> Key: HIVE-20442
> URL: https://issues.apache.org/jira/browse/HIVE-20442
> Project: Hive
> Issue Type: Bug
> Components: Hive, Transactions
> Affects Versions: 1.2.0, 2.1.1
> Environment: Hive-2.1
> Reporter: Rajkumar Singh
> Assignee: Rajkumar Singh
> Priority: Major
> Attachments: HIVE-20442.01.branch-2.patch,
> HIVE-20442.1-branch-1.2.patch, HIVE-20442.2-branch-1.2.patch,
> HIVE-20442.3-branch-1.2.patch
>
>
> this look like a race condition where background thread is not able to
> release the lock it aquired.
> 1. hiveserver2 background thread request for lock
> {code}
> 2018-08-20T14:13:38,813 INFO [HiveServer2-Background-Pool: Thread-XXXXX]:
> lockmgr.DbLockManager (DbLockManager.java:lock(100)) - Requesting:
> queryId=hive_xxxxxxx LockRequest(component:[LockComponent(type:SHARED_READ,
> level:TABLE, dbname:testdb, tablename:test_table, operationType:SELECT)],
> txnid:0, user:hive, hostname:HOSTNAME, agentInfo:hive_xxxxxxx)
> {code}
> 2. acquired the lock and start heartbeating
> {code}
> 2018-08-20T14:36:30,233 INFO [HiveServer2-Background-Pool: Thread-XXXXX]:
> lockmgr.DbTxnManager (DbTxnManager.java:startHeartbeat(517)) - Started
> heartbeat with delay/interval = 150000/150000 MILLISECONDS for
> query: agentInfo:hive_xxxxxxx
> {code}
> 3. during time between event #1 and #2, client disconnected and deleteContext
> cleanup the session dir
> {code}
> 2018-08-21T15:39:57,820 INFO [HiveServer2-Handler-Pool: Thread-XXX]:
> thrift.ThriftCLIService (ThriftBinaryCLIService.java:deleteContext(136)) -
> Session disconnected without closing properly.
> 2018-08-21T15:39:57,820 INFO [HiveServer2-Handler-Pool: Thread-XXXX]:
> thrift.ThriftCLIService (ThriftBinaryCLIService.java:deleteContext(140)) -
> Closing the session: SessionHandle [3be07faf-5544-4178-8b50-8173002b171a]
> 2018-08-21T15:39:57,820 INFO [HiveServer2-Handler-Pool: Thread-XXXX]:
> service.CompositeService (SessionManager.java:closeSession(363)) - Session
> closed, SessionHandle [xxxxxxxxxxxxxxxxxxxxxxx], current sessions:2
> {code}
> 4. background thread died with NPE while trying to get the queryid
> {code}
> java.lang.NullPointerException: null
> at org.apache.hadoop.hive.ql.Driver.execute(Driver.java:1568)
> ~[hive-exec-2.1.0.2.6.5.0-292.jar:2.1.0.2.6.5.0-292]
> at org.apache.hadoop.hive.ql.Driver.runInternal(Driver.java:1414)
> ~[hive-exec-2.1.0.2.6.5.0-292.jar:2.1.0.2.6.5.0-292]
> at org.apache.hadoop.hive.ql.Driver.run(Driver.java:1211)
> ~[hive-exec-2.1.0.2.6.5.0-292.jar:2.1.0.2.6.5.0-292]
> at org.apache.hadoop.hive.ql.Driver.run(Driver.java:1204)
> ~[hive-exec-2.1.0.2.6.5.0-292.jar:2.1.0.2.6.5.0-292]
> at
> org.apache.hive.service.cli.operation.SQLOperation.runQuery(SQLOperation.java:242)
> [hive-service-2.1.0.2.6.5.0-292.jar:2.1.0.2.6.5.0-292]
> at
> org.apache.hive.service.cli.operation.SQLOperation.access$800(SQLOperation.java:91)
> [hive-service-2.1.0.2.6.5.0-292.jar:2.1.0.2.6.5.0-292]
> at
> org.apache.hive.service.cli.operation.SQLOperation$BackgroundWork$1.run(SQLOperation.java:336)
> [hive-service-2.1.0.2.6.5.0-292.jar:2.1.0.2.6.5.0-292]
> at java.security.AccessController.doPrivileged(Native Method)
> [?:1.8.0_77]
> at javax.security.auth.Subject.doAs(Subject.java:422) [?:1.8.0_77]
> {code}
> did not get a chance to release the lock and heartbeater thread continue
> heartbeat indefinately.
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