[jira] [Created] (TEZ-1524) getDAGStatus seems to fork out the entire JVM

["Gopal V (JIRA)" <ji...@apache.org>]

Gopal V created TEZ-1524:
----------------------------

             Summary: getDAGStatus seems to fork out the entire JVM
                 Key: TEZ-1524
                 URL: https://issues.apache.org/jira/browse/TEZ-1524
             Project: Apache Tez
          Issue Type: Bug
    Affects Versions: 0.6.0
            Reporter: Gopal V
             Fix For: 0.6.0


Tracked down a consistent fork() call to

{code}
	at org.apache.hadoop.util.Shell.runCommand(Shell.java:505)
	at org.apache.hadoop.util.Shell.run(Shell.java:418)
	at org.apache.hadoop.util.Shell$ShellCommandExecutor.execute(Shell.java:650)
	at org.apache.hadoop.util.Shell.execCommand(Shell.java:739)
	at org.apache.hadoop.util.Shell.execCommand(Shell.java:722)
	at org.apache.hadoop.security.ShellBasedUnixGroupsMapping.getUnixGroups(ShellBasedUnixGroupsMapping.java:83)
	at org.apache.hadoop.security.ShellBasedUnixGroupsMapping.getGroups(ShellBasedUnixGroupsMapping.java:52)
	at org.apache.hadoop.security.JniBasedUnixGroupsMappingWithFallback.getGroups(JniBasedUnixGroupsMappingWithFallback.java:50)
	at org.apache.hadoop.security.Groups.getGroups(Groups.java:139)
	at org.apache.hadoop.security.UserGroupInformation.getGroupNames(UserGroupInformation.java:1409)
	at org.apache.tez.dag.api.client.rpc.DAGClientAMProtocolBlockingPBServerImpl.getRPCUserGroups(DAGClientAMProtocolBlockingPBServerImpl.java:75)
	at org.apache.tez.dag.api.client.rpc.DAGClientAMProtocolBlockingPBServerImpl.getDAGStatus(DAGClientAMProtocolBlockingPBServerImpl.java:102)
	at org.apache.tez.dag.api.client.rpc.DAGClientAMProtocolRPC$DAGClientAMProtocol$2.callBlockingMethod(DAGClientAMProtocolRPC.java:7375)
{code}

[~hitesh] - would it make sense to cache this at all?



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