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Re: YARN - specify hosts in ContainerRequest - MapReduce - [mail # user]
...YARN currently does not provide any guarantees that a container will be placed where you ask for it.  This is being addressed in YARN-392 and YARN-398.  For now, the Fair Scheduler...
   Author: Sandy Ryza, 2013-04-12, 19:15
[MAPREDUCE-5113] Streaming input/output types are ignored with java mapper/reducer - MapReduce - [issue]
...After MAPREDUCE-1888, with a java mapper or reducer, StreamJob doesn't respect stream.map.output/stream.reduce.output when setting a job's output key/value classes, even if these configs are...
http://issues.apache.org/jira/browse/MAPREDUCE-5113    Author: Sandy Ryza, 2013-04-11, 14:05
[MAPREDUCE-5111] RM address DNS lookup can cause unnecessary slowness on every JHS page load - MapReduce - [issue]
...When I run the job history server locally, every page load takes in the 10s of seconds.  I profiled the process and discovered that all the extra time was spent inside YarnConfiguration...
http://issues.apache.org/jira/browse/MAPREDUCE-5111    Author: Sandy Ryza, 2013-04-03, 01:25
Re: Streaming value of (200MB) from a SequenceFile - MapReduce - [mail # user]
...Hi Jerry,  I assume you're providing your own Writable implementation? The Writable readFields method is given a stream.  Are you able to perform you able to perform your processin...
   Author: Sandy Ryza, 2013-03-31, 18:10
[MAPREDUCE-5120] Allow app master to use tracing async dispatcher - MapReduce - [issue]
...YARN-366 proposes an option to add traces to events so that exceptions could report an events lineage.  This JIRA would add a mapreduce config option that would allow the MR app master ...
http://issues.apache.org/jira/browse/MAPREDUCE-5120    Author: Sandy Ryza, 2013-03-31, 06:49
Re: Any answer ? Candidate application for map reduce - MapReduce - [mail # user]
...Hi Bala,  A standard benchmark program for mapreduce is terasort, which is included in the hadoop examples jar.  You can generate data for it using teragen, which runs a map-only j...
   Author: Sandy Ryza, 2013-03-25, 19:52
[MAPREDUCE-5076] CombineFileInputFormat can create splits that exceed maxSplitSize - MapReduce - [issue]
...I ran a local job with CombineFileInputFormat using an 80 MB file and a max split size of 32 MB (the default local FS block size).  The job ran with two splits of 32 MB, and the last 16...
http://issues.apache.org/jira/browse/MAPREDUCE-5076    Author: Sandy Ryza, 2013-03-18, 21:21
[MAPREDUCE-5073] TestJobStatusPersistency.testPersistency fails on JDK7 - MapReduce - [issue]
...TestJobStatusPersistency is sensitive to the order that the tests are run in. If testLocalPersistency runs before testPersistency, testPersistency will fail....
http://issues.apache.org/jira/browse/MAPREDUCE-5073    Author: Sandy Ryza, 2013-03-15, 20:15
[MAPREDUCE-5072] TestDelegationTokenRenewal.testDTRenewal fails in MR1 on jdk7 - MapReduce - [issue]
...TestDelegationTokenRenewal.testDTRenewal fails in MR1 for the reasons that TestDelegationTokenRenewer.testDTRenewal fails described in YARN-31.  The fix is the same....
http://issues.apache.org/jira/browse/MAPREDUCE-5072    Author: Sandy Ryza, 2013-03-15, 17:50
[MAPREDUCE-5070] TestClusterStatus.testClusterMetrics fails on JDK7 - MapReduce - [issue]
...TestClusterStatus is sensitive to the order that the tests are run in.  If testReservedSlots is called before testClusterMetrics, testClusterMetrics will fail....
http://issues.apache.org/jira/browse/MAPREDUCE-5070    Author: Sandy Ryza, 2013-03-15, 17:50
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