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[MAPREDUCE-5817] mappers get rescheduled on node transition even after all reducers are completed - MapReduce - [issue]
...We're seeing a behavior where a job runs long after all reducers were already finished. We found that the job was rescheduling and running a number of mappers beyond the point of reducer com...
http://issues.apache.org/jira/browse/MAPREDUCE-5817    Author: Sangjin Lee, 2014-07-03, 06:33
[MAPREDUCE-5751] MR app master fails to start in some cases if mapreduce.job.classloader is true - MapReduce - [issue]
...If mapreduce.job.classloader is set to true, and the MR client includes a jetty jar in its libjars or job jar, the MR app master fails to start. A typical stack trace we get is as follows:ja...
http://issues.apache.org/jira/browse/MAPREDUCE-5751    Author: Sangjin Lee, 2014-07-02, 06:12
[MAPREDUCE-5841] uber job doesn't terminate on getting mapred job kill - MapReduce - [issue]
...If you issue a "mapred job -kill" against a uberized job, the job (and the yarn application) state transitions to KILLED, but the application master process continues to run. The job actuall...
http://issues.apache.org/jira/browse/MAPREDUCE-5841    Author: Sangjin Lee, 2014-06-30, 09:18
[expand - 1 more] - Re: hadoop-2.5 - June end? - MapReduce - [mail # dev]
...Hi Karthik,Regarding YARN-1492 (shared cache), it should not hold up 2.5 if it is notthere. If it's not there, it's not there.Also, FYI, since it turns out the changes are not too large and ...
   Author: Sangjin Lee, 2014-06-28, 02:39
[MAPREDUCE-5662] implement the support for using the shared cache for the job jar and libjars - MapReduce - [issue]
http://issues.apache.org/jira/browse/MAPREDUCE-5662    Author: Sangjin Lee, 2014-03-06, 19:21
[MAPREDUCE-5744] Job hangs because RMContainerAllocator$AssignedRequests.preemptReduce() violates the comparator contract - MapReduce - [issue]
...We ran into a situation where tasks are not getting assigned because RMContainerAllocator$AssignedRequests.preemptReduce() fails repeatedly with the following exception:2014-02-06 16:43:45,1...
http://issues.apache.org/jira/browse/MAPREDUCE-5744    Author: Sangjin Lee, 2014-02-28, 21:35
[MAPREDUCE-5232] log classpath and other key properties on child JVM start - MapReduce - [issue]
...It would be great if we log vital information such as classpath, etc. upon a mapreduce child JVM start. This would help a great deal in terms of troubleshooting classpath issues, etc. Today ...
http://issues.apache.org/jira/browse/MAPREDUCE-5232    Author: Sangjin Lee, 2014-02-19, 02:04
Re: [VOTE] Release Apache Hadoop 2.3.0 - MapReduce - [mail # dev]
...If it's not too late, I'd like to bring your attention to YARN-1692.We get a ConcurrentModificationException with the fair scheduler when itupdates demand, and we saw RM get into a pretty ba...
   Author: Sangjin Lee, 2014-02-12, 19:57
[MAPREDUCE-5186] mapreduce.job.max.split.locations causes some splits created by CombineFileInputFormat to fail - MapReduce - [issue]
...CombineFileInputFormat can easily create splits that can come from many different locations (during the last pass of creating "global" splits). However, we observe that this often runs afoul...
http://issues.apache.org/jira/browse/MAPREDUCE-5186    Author: Sangjin Lee, 2014-01-28, 23:33
branch development for HADOOP-9639 - MapReduce - [mail # dev]
...We have been having discussions on HADOOP-9639 (shared cache for jars) and the proposed design there for some time now. We are going to start work on this and have it vetted and reviewed by ...
   Author: Sangjin Lee, 2013-12-02, 19:47
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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