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MapReduce, mail # user - one minute delay in running a simple ls command on hadoop (maybe near security groups..): hadoop 0.23.5


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one minute delay in running a simple ls command on hadoop (maybe near security groups..): hadoop 0.23.5
Gopi Krishna M 2013-03-31, 06:17
Hi..

I have installed hadoop 0.23.5 and is working fine on two of my
installations.  In a new installation on Windows Azure VMs, I am seeing an
inordinate delay (of 1 minute) when doing a simple dfs ls command.

This is a 3 node cluster, running 64 bit Ubuntu 12.04.1 LTS, Sun jre

command : bin/hadoop dfs -ls /

With log set to DEBUG, following is the output on the console.  The logs in
bold show the sleep/timeout/delay of *1 minute*.  Any pointers on what to
check for / what is the reason for this delay?

13/03/31 05:48:55 DEBUG lib.MutableMetricsFactory: field
org.apache.hadoop.metrics2.lib.MutableRate
org.apache.hadoop.security.UserGroupInformation$UgiMetrics.loginSuccess
with annotation @org.apache.
hadoop.metrics2.annotation.Metric(valueName=Time, about=, value=[Rate of
successful kerberos logins
and latency (milliseconds)], always=false, type=DEFAULT, sampleName=Ops)
13/03/31 05:48:55 DEBUG lib.MutableMetricsFactory: field
org.apache.hadoop.metrics2.lib.MutableRate
org.apache.hadoop.security.UserGroupInformation$UgiMetrics.loginFailure
with annotation @org.apache.
hadoop.metrics2.annotation.Metric(valueName=Time, about=, value=[Rate of
failed kerberos logins and
latency (milliseconds)], always=false, type=DEFAULT, sampleName=Ops)
13/03/31 05:48:55 DEBUG impl.MetricsSystemImpl: UgiMetrics, User and group
related metrics
13/03/31 05:49:55 DEBUG security.Groups:  Creating new Groups object
*13/03/31 05:49:55 DEBUG security.Groups: Group mapping
impl=org.apache.hadoop.security.ShellBasedUni*
*xGroupsMapping; cacheTimeout=300000*
*13/03/31 05:50:55 DEBUG security.UserGroupInformation: hadoop login*
13/03/31 05:50:55 DEBUG security.UserGroupInformation: hadoop login commit
13/03/31 05:50:55 DEBUG security.UserGroupInformation: using local
user:UnixPrincipal: hduser
13/03/31 05:50:55 DEBUG security.UserGroupInformation: UGI loginUser:hduser
(auth:SIMPLE)
13/03/31 05:50:56 DEBUG hdfs.DFSClient: Short circuit read is false
13/03/31 05:50:56 DEBUG ipc.Client: The ping interval is 60000 ms.
13/03/31 05:50:56 DEBUG ipc.Client: Use SIMPLE authentication for protocol
ClientProtocol
13/03/31 05:50:56 DEBUG ipc.Client: Connecting to XXXXXX:9000
Thanks
Gopi