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[HADOOP-11409] FileContext.getFileContext can stack overflow if default fs misconfigured - Hadoop - [issue]
...If the default filesystem is misconfigured such that it doesn't have a scheme then FileContext.getFileContext(URI, Configuration) will call FileContext.getFileContext(Configuration) which in...
http://issues.apache.org/jira/browse/HADOOP-11409    Author: Jason Lowe, 2014-12-19, 15:25
[YARN-2972] DelegationTokenRenewer thread pool never expands - YARN - [issue]
...DelegationTokenRenewer uses a thread pool to manage token renewals.  The number of threads is configurable, but unfortunately the pool never expands beyond the hardcoded initial 5 threa...
http://issues.apache.org/jira/browse/YARN-2972    Author: Jason Lowe, 2014-12-18, 15:34
[expand - 1 more] - Re: [ANNOUNCE] New Hadoop Committers - Akira Ajisaka and Tsuyoshi Ozawa - Hadoop - [mail # general]
...Congratulations Akira and Tsuyoshi!Jason      From: Steve Loughran  To: [EMAIL PROTECTED]  Sent: Wednesday, December 17, 2014 9:55 AM Subject: [ANNOUNCE] N...
   Author: Jason Lowe, 2014-12-17, 16:30
[HADOOP-10048] LocalDirAllocator should avoid holding locks while accessing the filesystem - Hadoop - [issue]
...As noted in MAPREDUCE-5584 and HADOOP-7016, LocalDirAllocator can be a bottleneck for multithreaded setups like the ShuffleHandler.  We should consider moving to a lockless design or mi...
http://issues.apache.org/jira/browse/HADOOP-10048    Author: Jason Lowe, 2014-12-17, 03:25
[MAPREDUCE-4815] FileOutputCommitter.commitJob can be very slow for jobs with many output files - MapReduce - [issue]
...If a job generates many files to commit then the commitJob method call at the end of the job can take minutes.  This is a performance regression from 1.x, as 1.x had the tasks commit di...
http://issues.apache.org/jira/browse/MAPREDUCE-4815    Author: Jason Lowe, 2014-12-16, 18:40
[YARN-2902] Killing a container that is localizing can orphan resources in the DOWNLOADING state - YARN - [issue]
...If a container is in the process of localizing when it is stopped/killed then resources are left in the DOWNLOADING state.  If no other container comes along and requests these resource...
http://issues.apache.org/jira/browse/YARN-2902    Author: Jason Lowe, 2014-12-15, 18:03
[MAPREDUCE-5583] Ability to limit running map and reduce tasks - MapReduce - [issue]
...It would be nice if users could specify a limit to the number of map or reduce tasks that are running simultaneously.  Occasionally users are performing operations in tasks that can lea...
http://issues.apache.org/jira/browse/MAPREDUCE-5583    Author: Jason Lowe, 2014-12-08, 02:52
[expand - 2 more] - Re: [ANNOUNCE] New Hadoop Committer - Carlo Curino - Hadoop - [mail # general]
...Congratulations, Carlo!Jason     From: Chris Douglas  To: "[EMAIL PROTECTED]"   Sent: Friday, December 5, 2014 2:43 PM Subject: [ANNOUNCE] New Hadoop Commi...
   Author: Jason Lowe, 2014-12-05, 21:13
[YARN-2847] Linux native container executor segfaults if default banned user detected - YARN - [issue]
...The check_user function in container-executor.c can cause a segmentation fault if banned.users is not provided but the user is detected as one of the default users.  In that scenario it...
http://issues.apache.org/jira/browse/YARN-2847    Author: Jason Lowe, 2014-12-03, 22:42
[YARN-2765] Add leveldb-based implementation for RMStateStore - YARN - [issue]
...It would be nice to have a leveldb option to the resourcemanager recovery store. Leveldb would provide some benefits over the existing filesystem store such as better support for atomic oper...
http://issues.apache.org/jira/browse/YARN-2765    Author: Jason Lowe, 2014-12-02, 15:27
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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