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Re: How does Kerberos work with Hadoop ? - MapReduce - [mail # user]
...You should read the hadoop security design doc which you can find at https://issues.apache.org/jira/browse/HADOOP-4487  HTH, +Vinod Kumar Vavilapalli Hortonworks Inc. http://hortonworks...
   Author: Vinod Kumar Vavilapalli, 2013-02-21, 21:09
Re: who runs the map and reduce tasks in the unit tests - MapReduce - [mail # user]
...Not sure which specific tests you are talking about. There are two types of them:  - Real unit tests which unit test code, shouldn't run any MR jobs  - The remaining 'unit' tests a...
   Author: Vinod Kumar Vavilapalli, 2013-02-21, 21:07
[MAPREDUCE-4712] mr-jobhistory-daemon.sh doesn't accept --config - MapReduce - [issue]
...It says$ $HADOOP_MAPRED_HOME/sbin/mr-jobhistory-daemon.sh --config /Users/vinodkv/tmp/conf/ start historyserverUsage: mr-jobhistory-daemon.sh [--config <conf-dir>] (start|stop) <map...
http://issues.apache.org/jira/browse/MAPREDUCE-4712    Author: Vinod Kumar Vavilapalli, 2013-02-15, 13:10
Re: mapreduce.jobtracker.address vs. yarn.resourcemanager.address - MapReduce - [mail # dev]
...There was a time when there were thoughts of being able to run MR1 in parallel with YARN while the later took off. So they were supposed to coexist, hence the non-deprecation.  I am not...
   Author: Vinod Kumar Vavilapalli, 2013-02-08, 22:27
Re: API incompatibility between Hadoop 1.0 and Hadoop 2.0 - MapReduce - [mail # dev]
...It isn't complete yet, but Tom did some initial work comparing with 23 which (preceeds 2.0): https://issues.apache.org/jira/browse/HADOOP-7738  We need to take that to the finish line. ...
   Author: Vinod Kumar Vavilapalli, 2013-02-08, 18:37
[MAPREDUCE-1688] A failing retry'able notification in JobEndNotifier can affect notifications of other jobs. - MapReduce - [issue]
...The JobTracker puts all the notification commands into a delay-queue.  It has a single thread that loops through this queue and sends out the notifications.  When it hits failures ...
http://issues.apache.org/jira/browse/MAPREDUCE-1688    Author: Vinod Kumar Vavilapalli, 2013-02-01, 03:20
Re: Release numbering for branch-2 releases - MapReduce - [mail # dev]
...I still have a list of pending API/protocol cleanup in YARN that need to be in before we even attempt supporting compatibility further down the road. There's no way we can support wire compa...
   Author: Vinod Kumar Vavilapalli, 2013-01-30, 23:32
Re: jobTracker Blacklisted Nodes - MapReduce - [mail # user]
...Overall tasks can fail because of the job itself (bugs or erroneous condition in job's/user's code) or issues on the node (hardware/system software).  Job level blacklisting accounts fo...
   Author: Vinod Kumar Vavilapalli, 2013-01-29, 02:18
Re: warnings from log4j -- where to look to resolve? - MapReduce - [mail # user]
...Try passing -Dlog4j.debug via mapred.child.java.opts. That will clearly show you the problem as part of logs itself.  Are these errors appearing in stdout/stderr or syslog?  +Vinod...
   Author: Vinod Kumar Vavilapalli, 2013-01-29, 02:13
Re: number of mapper tasks - MapReduce - [mail # user]
...Regarding your original question, you can use the min and max split settings to control the number of maps: http://hadoop.apache.org/docs/stable/api/org/apache/hadoop/mapreduce/lib/input/Fil...
   Author: Vinod Kumar Vavilapalli, 2013-01-29, 02:08
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