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[MAPREDUCE-5957] AM throws ClassNotFoundException with job classloader enabled if custom output format/committer is used - MapReduce - [issue]
...With the job classloader enabled, the MR AM throws ClassNotFoundException if a custom output format class is specified.org.apache.hadoop.yarn.exceptions.YarnRuntimeException: java.lang.Runti...
http://issues.apache.org/jira/browse/MAPREDUCE-5957    Author: Sangjin Lee, 2014-07-22, 16:04
[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
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-5878] some standard JDK APIs are not part of system classes defaults - MapReduce - [issue]
...There are some standard JDK APIs that are not part of the mapreduce.job.classloader.system.classes property value.Currently the default value covers only "java.,javax." from the JDK. However...
http://issues.apache.org/jira/browse/MAPREDUCE-5878    Author: Sangjin Lee, 2014-06-20, 18:59
[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
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