Peter Vary created HIVE-20969:
---------------------------------

             Summary: HoS sessionId generation can cause race conditions when 
uploading files to HDFS
                 Key: HIVE-20969
                 URL: https://issues.apache.org/jira/browse/HIVE-20969
             Project: Hive
          Issue Type: Bug
          Components: Spark
    Affects Versions: 4.0.0
            Reporter: Peter Vary
            Assignee: Peter Vary


The observed exception is:
{code}
Caused by: java.io.FileNotFoundException: File does not exist: 
/tmp/hive/_spark_session_dir/0/hive-exec-2.1.1-SNAPSHOT.jar (inode 21140) 
[Lease.  Holder: DFSClient_NONMAPREDUCE_304217459_39, pending creates: 1]
        at 
org.apache.hadoop.hdfs.server.namenode.FSNamesystem.checkLease(FSNamesystem.java:2781)
        at 
org.apache.hadoop.hdfs.server.namenode.FSDirWriteFileOp.analyzeFileState(FSDirWriteFileOp.java:599)
        at 
org.apache.hadoop.hdfs.server.namenode.FSDirWriteFileOp.validateAddBlock(FSDirWriteFileOp.java:171)
        at 
org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:2660)
        at 
org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.addBlock(NameNodeRpcServer.java:872)
        at 
org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.addBlock(ClientNamenodeProtocolServerSideTranslatorPB.java:550)
        at 
org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java)
        at 
org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:523)
        at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:991)
        at org.apache.hadoop.ipc.Server$RpcCall.run(Server.java:869)
        at org.apache.hadoop.ipc.Server$RpcCall.run(Server.java:815)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAs(Subject.java:422)
        at 
org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1875)
        at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2675)
{code}



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