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[MAPREDUCE-5658] JHS API and other changes to support tags - MapReduce - [issue]
...YARN-1399 introduces support for adding tags to an application. The JHS should use this and support querying MR jobs with particular tags set....
http://issues.apache.org/jira/browse/MAPREDUCE-5658    Author: Karthik Kambatla, 2013-11-29, 07:13
Re: sclipse plugin - MapReduce - [mail # dev]
...Something that I wrote up a while ago - http://blog.cloudera.com/blog/2013/05/how-to-configure-eclipse-for-hadoop-contributions/  I think the wiki has also been updated recently, not ce...
   Author: Karthik Kambatla, 2013-11-18, 02:56
[MAPREDUCE-5384] Races in DelegationTokenRenewal - MapReduce - [issue]
...There are a couple of races in DelegationTokenRenewal. One of them was addressed by MAPREDUCE-4860, which introduced a deadlock while fixing this race. Opening a new JIRA per discussion in M...
http://issues.apache.org/jira/browse/MAPREDUCE-5384    Author: Karthik Kambatla, 2013-09-18, 08:05
[expand - 1 more] - Re: [VOTE] Release Apache Hadoop 2.1.1-beta - MapReduce - [mail # dev]
...Not sure if this should be a blocker for 2.1.1, but filed HADOOP-9976 to have a single version of avro.   On Tue, Sep 17, 2013 at 6:51 AM, Andrew Wang wrote:  ...
   Author: Karthik Kambatla, 2013-09-17, 22:03
[MAPREDUCE-5213] Re-assess TokenCache methods marked @Private - MapReduce - [issue]
...While looking at the source, noticed that TokenCache#loadTokens methods are marked @Private but not used anywhere. We should either remove those methods or mark them Public or LimitedPrivate...
http://issues.apache.org/jira/browse/MAPREDUCE-5213    Author: Karthik Kambatla, 2013-08-27, 23:22
Re: why FairScheduler prefer to schedule MR jobs into the same node? - MapReduce - [mail # user]
...It is possible that you have assignMultiple set to true in your fair scheduler configuration - that leads to assigning as many tasks on a single node heartbeat as the node can accommodate. S...
   Author: Karthik Kambatla, 2013-08-09, 21:48
[MAPREDUCE-5364] Deadlock between RenewalTimerTask methods cancel() and run() - MapReduce - [issue]
...MAPREDUCE-4860 introduced a local variable cancelled in RenewalTimerTask to fix the race where DelegationTokenRenewal attempts to renew a token even after the job is removed. However, the pa...
http://issues.apache.org/jira/browse/MAPREDUCE-5364    Author: Karthik Kambatla, 2013-08-04, 09:23
[MAPREDUCE-4860] DelegationTokenRenewal attempts to renew token even after a job is removed - MapReduce - [issue]
...mapreduce.security.token.DelegationTokenRenewal synchronizes on removeDelegationToken, but fails to synchronize on addToken, and renewing tokens in run().This inconsistency is exposed by fre...
http://issues.apache.org/jira/browse/MAPREDUCE-4860    Author: Karthik Kambatla, 2013-07-11, 21:30
[MAPREDUCE-4707] Add a comment to explain why FairScheduler#dump()'s body is synchronized on eventLog - MapReduce - [issue]
...FairScheduler#dump() is a synchronized method. In addition to that, the entire method body is in a synchronized block on eventLog. However, there is no other portion of the code that tries t...
http://issues.apache.org/jira/browse/MAPREDUCE-4707    Author: Karthik Kambatla, 2013-06-07, 04:49
[MAPREDUCE-5250] Searching for ';' in JobTracker History throws ArrayOutOfBoundException - MapReduce - [issue]
...Searching for ';' in JobTracker History throws ArrayOutOfBoundException Problem accessing /jobhistoryhome.jsp. Reason:    0Caused by:java.lang.ArrayIndexOutOfBoundsException: ...
http://issues.apache.org/jira/browse/MAPREDUCE-5250    Author: Karthik Kambatla, 2013-06-03, 19:02
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NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB