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https://issues.apache.org/jira/browse/HIVE-14690?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15475480#comment-15475480
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Tao Li commented on HIVE-14690:
-------------------------------
bq.The code outside the synchronization block will be trivial, right?
This is just a perf optimization. Concurrent calls should be able to check the
flag without waiting for the lock.
> Query fail when hive.exec.parallel=true, with conflicting session dir
> ---------------------------------------------------------------------
>
> Key: HIVE-14690
> URL: https://issues.apache.org/jira/browse/HIVE-14690
> Project: Hive
> Issue Type: Bug
> Affects Versions: 1.3.0, 2.1.0
> Reporter: Daniel Dai
> Assignee: Daniel Dai
> Attachments: HIVE-14690.1.patch, HIVE-14690.2.patch,
> HIVE-14690.3.patch
>
>
> This happens when hive.scratchdir.lock=true. Error message:
> {code}
> /hive/scratch/343hdirdp/cab907fc-5e1d-4d69-aa72-d7b442495c7a/inuse.info
> (inode 19537): File does not exist. [Lease. Holder:
> DFSClient_NONMAPREDUCE_1572639975_1, pendingcreates: 2]
> at
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.checkLease(FSNamesystem.java:3430)
> at
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.analyzeFileState(FSNamesystem.java:3235)
> at
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getNewBlockTargets(FSNamesystem.java:3073)
> at
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:3033)
> at
> org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.addBlock(NameNodeRpcServer.java:725)
> at
> org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.addBlock(ClientNamenodeProtocolServerSideTranslatorPB.java:492)
> at
> org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java)
> at
> org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:616)
> at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:969)
> at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2137)
> at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2133)
> at java.security.AccessController.doPrivileged(Native Method)
> at javax.security.auth.Subject.doAs(Subject.java:415)
> at
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1668)
> at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2131)
> at
> org.apache.hadoop.hive.ql.session.SessionState.start(SessionState.java:535)
> at org.apache.hadoop.hive.ql.exec.TaskRunner.run(TaskRunner.java:74)
> {code}
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