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https://issues.apache.org/jira/browse/HIVE-14173?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15365508#comment-15365508
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Sergey Shelukhin commented on HIVE-14173:
-----------------------------------------
Just one issue - it's not threadsafe.
> NPE was thrown after enabling directsql in the middle of session
> ----------------------------------------------------------------
>
> Key: HIVE-14173
> URL: https://issues.apache.org/jira/browse/HIVE-14173
> Project: Hive
> Issue Type: Bug
> Components: Metastore
> Reporter: Chaoyu Tang
> Assignee: Chaoyu Tang
> Attachments: HIVE-14173.patch
>
>
> hive.metastore.try.direct.sql is initially set to false in HMS hive-site.xml,
> then changed to true using set metaconf command in the middle of a session,
> running a query will be thrown NPE with error message is as following:
> {code}
> 2016-07-06T17:44:41,489 ERROR [pool-5-thread-2]: metastore.RetryingHMSHandler
> (RetryingHMSHandler.java:invokeInternal(192)) -
> MetaException(message:java.lang.NullPointerException)
> at
> org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.newMetaException(HiveMetaStore.java:5741)
> at
> org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.rethrowException(HiveMetaStore.java:4771)
> at
> org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.get_partitions_by_expr(HiveMetaStore.java:4754)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:606)
> at
> org.apache.hadoop.hive.metastore.RetryingHMSHandler.invokeInternal(RetryingHMSHandler.java:140)
> at
> org.apache.hadoop.hive.metastore.RetryingHMSHandler.invoke(RetryingHMSHandler.java:99)
> at com.sun.proxy.$Proxy18.get_partitions_by_expr(Unknown Source)
> at
> org.apache.hadoop.hive.metastore.api.ThriftHiveMetastore$Processor$get_partitions_by_expr.getResult(ThriftHiveMetastore.java:12048)
> at
> org.apache.hadoop.hive.metastore.api.ThriftHiveMetastore$Processor$get_partitions_by_expr.getResult(ThriftHiveMetastore.java:12032)
> at org.apache.thrift.ProcessFunction.process(ProcessFunction.java:39)
> at
> org.apache.hadoop.hive.metastore.TUGIBasedProcessor$1.run(TUGIBasedProcessor.java:110)
> at
> org.apache.hadoop.hive.metastore.TUGIBasedProcessor$1.run(TUGIBasedProcessor.java:106)
> at java.security.AccessController.doPrivileged(Native Method)
> at javax.security.auth.Subject.doAs(Subject.java:415)
> at
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1628)
> at
> org.apache.hadoop.hive.metastore.TUGIBasedProcessor.process(TUGIBasedProcessor.java:118)
> at
> org.apache.thrift.server.TThreadPoolServer$WorkerProcess.run(TThreadPoolServer.java:286)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> at java.lang.Thread.run(Thread.java:744)
> Caused by: java.lang.NullPointerException
> at
> org.apache.hadoop.hive.metastore.ObjectStore$GetHelper.<init>(ObjectStore.java:2667)
> at
> org.apache.hadoop.hive.metastore.ObjectStore$GetListHelper.<init>(ObjectStore.java:2825)
> at
> org.apache.hadoop.hive.metastore.ObjectStore$4.<init>(ObjectStore.java:2410)
> at
> org.apache.hadoop.hive.metastore.ObjectStore.getPartitionsByExprInternal(ObjectStore.java:2410)
> at
> org.apache.hadoop.hive.metastore.ObjectStore.getPartitionsByExpr(ObjectStore.java:2400)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:606)
> at
> org.apache.hadoop.hive.metastore.RawStoreProxy.invoke(RawStoreProxy.java:101)
> at com.sun.proxy.$Proxy17.getPartitionsByExpr(Unknown Source)
> at
> org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.get_partitions_by_expr(HiveMetaStore.java:4749)
> ... 20 more
> {code}
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