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spill taking too long - MapReduce - [mail # dev]
...Hi, We use cdh3b2. We sometimes see maptask timeout. Here is log from one of the maptasks:  2010-11-04 10:34:23,820 INFO org.apache.hadoop.mapred.MapTask: Spilling map output: buffer fu...
   Author: Ted Yu, 2010-11-04, 18:36
[MAPREDUCE-2174] Introduce timeout in bin/slaves.sh - MapReduce - [issue]
...If connection to one slave has problem, slaves.sh appears to hang.We can incorporate timeout mechanism by using the script from Dmitry V Golovashkin...
http://issues.apache.org/jira/browse/MAPREDUCE-2174    Author: Ted Yu, 2010-11-03, 23:26
Re: MultipleOutputFormat - MapReduce - [mail # user]
...  * Generate the file output file name based on the given key and the leaf file    * name. The default behavior is that the file name does not depend on the    * key...
   Author: Ted Yu, 2010-10-31, 21:10
[expand - 1 more] - Re: How to modify heartbeat message and its return message? - MapReduce - [mail # user]
...Take a look at FSNamesystem.heartbeatCheck()  On Wed, Oct 27, 2010 at 5:21 PM, Shen LI  wrote:  ...
   Author: Ted Yu, 2010-10-28, 08:35
[expand - 3 more] - Re: ClassCastException - MapReduce - [mail # user]
...Have you checked http://download.oracle.com/javase/6/docs/api/javax/xml/stream/XMLEventReader.html?  On Thu, Oct 7, 2010 at 5:49 PM, Johannes.Lichtenberger  wrote:  ...
   Author: Ted Yu, 2010-10-08, 00:52
[expand - 1 more] - Re: how to set system properties for mapper/reducer? - MapReduce - [mail # user]
...If you look at the parameters passed to your mapper/reducer, you should see something like this:  -Djava.library.path=/opt//hadoop/bin/../lib/native/Linux-amd64-64:/tmp/hadoop-hadoop/ma...
   Author: Ted Yu, 2010-10-08, 00:48
JMock - MapReduce - [mail # dev]
...Hi, If you use JMock for unit testing mapred, please drop me a line.  Thanks...
   Author: Ted Yu, 2010-09-27, 22:02
Re: MiniMRCluster not found - MapReduce - [mail # user]
...The source code is located at hadoop-0.20.2+320//src/test/org/apache/hadoop/mapred/MiniMRCluster.java  On Sun, Sep 26, 2010 at 2:23 PM, Johannes.Lichtenberger  wrote:  ...
   Author: Ted Yu, 2010-09-26, 21:34
[expand - 2 more] - Re: Remote connection bottleneck? - MapReduce - [mail # user]
...Why didn't you issue the command from window which had ssh ?  On Sat, Sep 25, 2010 at 6:53 PM, Mario M  wrote:  ...
   Author: Ted Yu, 2010-09-26, 02:22
heap dump on GC overhead limit exceeded error - MapReduce - [mail # dev]
...Hi, We use the following for mapred.child.java.opts:  -Xmx3800m -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=/usr/local/hadoop/hprof -XX:ErrorFile=/usr/local/hadoop/hadoop/logs/user...
   Author: Ted Yu, 2010-09-20, 01:27
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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