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https://issues.apache.org/jira/browse/TEZ-1961?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14547500#comment-14547500
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Jeff Zhang commented on TEZ-1961:
---------------------------------
bq. I believe the main change here is that submitDag() in non session mode will
wait for the AM to come up and move into RUNNING state (all on the client),
before returning a DAGClient to the user ?
The patch mostly looks good to me.
Yes. that's correct.
[~bikassaha] This patch won't affect the session mode, just make
getAppMasterStatus() available for non-session mode so that TezClient will wait
until the AM move into RUNNING state for non-session mode.
> Remove misleading exception "No running dag" from AM logs
> ---------------------------------------------------------
>
> Key: TEZ-1961
> URL: https://issues.apache.org/jira/browse/TEZ-1961
> Project: Apache Tez
> Issue Type: Improvement
> Reporter: Siddharth Seth
> Assignee: Jeff Zhang
> Priority: Critical
> Attachments: TEZ-1961-1.patch, TEZ-1961-2.patch, TEZ-1961-3.patch
>
>
> {code}
> 15/01/14 16:45:06 INFO ipc.Server: IPC Server handler 0 on 51000, call
> org.apache.tez.dag.api.client.rpc.DAGClientAMProtocolBlockingPB.getDAGStatus
> from Call#0 Retry#0
> org.apache.tez.dag.api.TezException: No running dag at present
> at
> org.apache.tez.dag.api.client.DAGClientHandler.getDAG(DAGClientHandler.java:84)
> at
> org.apache.tez.dag.api.client.DAGClientHandler.getACLManager(DAGClientHandler.java:151)
> at
> org.apache.tez.dag.api.client.rpc.DAGClientAMProtocolBlockingPBServerImpl.getDAGStatus(DAGClientAMProtocolBlockingPBServerImpl.java:94)
> at
> org.apache.tez.dag.api.client.rpc.DAGClientAMProtocolRPC$DAGClientAMProtocol$2.callBlockingMethod(DAGClientAMProtocolRPC.java:7375)
> at
> org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:617)
> at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:962)
> at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2041)
> at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2037)
> at java.security.AccessController.doPrivileged(Native Method)
> at javax.security.auth.Subject.doAs(Subject.java:415)
> at
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1657)
> at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2035)
> 15/01/14 16:45:06 INFO client.DAGClientImpl: DAG initialized:
> CurrentState=Running
> {code}
> This exception shows up fairly often and isn't very relevant - queries before
> a DAG is submitted to the AM.
> This is very misleading, especially for folks new to Tez, and should be
> removed.
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