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Re: what is the use of YARN proxyserver? - Hadoop - [mail # user]
...This link http://hadoop.apache.org/docs/current/hadoop-yarn/hadoop-yarn-site/WebApplicationProxy.htmlexplains some of it.  Jian   On Wed, Nov 27, 2013 at 7:47 PM, Henry Hung  ...
   Author: Jian He, 2013-11-28, 05:15
Re: default capacity scheduler only one job in running status - Hadoop - [mail # user]
...yarn.scheduler.capacity.maximum-am-resource-percent  limits the max number of concurrently running AMs. By that I mean the max memory allowed for allocating AM (defined by this property...
   Author: Jian He, 2013-11-27, 02:33
Re: temporary file locations for YARN applications - Hadoop - [mail # user]
...This post might help a bit. http://hortonworks.com/blog/management-of-application-dependencies-in-yarn/  Thanks, Jian   On Mon, Oct 21, 2013 at 11:11 AM, Harsh J  wrote:  ...
   Author: Jian He, 2013-10-21, 18:22
Re: "bad interpreter: Text file busy" and other errors in Hadoop 2.1.0-beta - Hadoop - [mail # user]
...Hi John  This exception should indicate error from the container process. If the container process exits with non-zero exit code, it will be logged. In case of such errors, you'd better...
   Author: Jian He, 2013-08-31, 19:42
[HADOOP-9574] Add new methods in AbstractDelegationTokenSecretManager for restoring RMDelegationTokens on RMRestart - Hadoop - [issue]
...we're considering to add the following methods in AbstractDelegationTokenSecretManager for restoring RMDelegationTokens, these methods can also possibly be reused by hdfsDelegationTokenSecre...
http://issues.apache.org/jira/browse/HADOOP-9574    Author: Jian He, 2013-08-07, 17:24
Re: Running example programs on YARN - Hadoop - [mail # user]
...Yes, check the code base, there's a thing called MRAppMaster for all MR programs and YARNRunner to enable current JobClient to run on YARN.  Jian   On Sun, Jul 14, 2013 at 12:55 PM...
   Author: Jian He, 2013-07-14, 20:27
[HADOOP-9589] Extra master key is created when AbstractDelegationTokenSecretManager is started - Hadoop - [issue]
...When AbstractDelegationTokenSecretManager starts , AbstractDelegationTokenSecretManager.startThreads().updateCurrentKey() creates the first master key. Immediately after that, ExpiredTokenRe...
http://issues.apache.org/jira/browse/HADOOP-9589    Author: Jian He, 2013-06-11, 01:31
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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