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Re: rack awarness unexpected behaviour - Hadoop - [mail # user]
...I'm not aware of a bug in 0.20.2 that would not honor the Rack Awareness, but have you done the two below checks as well?  1. Ensuring JT has the same rack awareness scripts and configu...
   Author: Harsh J, 2013-08-22, 10:14
Re: Reduce Task Clarification - Hadoop - [mail # user]
...Are you looking to do a secondary sort under a grouped key?  A reduce() is called once for each globally unique map() emitted key, along with all values grouped for it. To sort the grou...
   Author: Harsh J, 2013-08-14, 05:28
[HADOOP-9346] Upgrading to protoc 2.5.0 fails the build - Hadoop - [issue]
...Reported over the impala lists, one of the errors received is:src/hadoop-common-project/hadoop-common/target/generated-sources/java/org/apache/hadoop/ha/proto/ZKFCProtocolProtos.java:[104,37...
http://issues.apache.org/jira/browse/HADOOP-9346    Author: Harsh J, 2013-08-14, 05:04
Re: protobuf upgrade on Jenkins slaves causing build failures? - Hadoop - [mail # dev]
...Hey Chris,  Yep the protobuf version on the machine was upped. We have a parallel ongoing discussion on the same lists under the title "Upgrade to protobuf 2.5.0 for the 2.1.0 release" ...
   Author: Harsh J, 2013-08-13, 03:04
[HADOOP-9861] Invert ReflectionUtils' stack trace - Hadoop - [issue]
...Often an MR task (as an example) may fail at the configure stage due to a misconfiguration or whatever, and the only thing a user gets by virtue of MR pulling limited bytes of the diagnostic...
http://issues.apache.org/jira/browse/HADOOP-9861    Author: Harsh J, 2013-08-12, 17:04
Re: hadoop v0.23.9, namenode -format command results in Could not find or load main class org.apache.hadoop.hdfs.server.namenode.NameNode - Hadoop - [mail # user]
...I don't think you ought to be using HADOOP_HOME anymore.  Try "unset HADOOP_HOME" and then "export HADOOP_PREFIX=/opt/hadoop" and retry the NN command.  On Sun, Aug 11, 2013 at 8:5...
   Author: Harsh J, 2013-08-11, 07:21
Re: HDFS 1.1.0 - File Append - Hadoop - [mail # user]
...HBase does not use append(…) anywhere. It only syncs(…) over its WAL stream and although sync(…) was an API. Append on 1.x is pretty much broken for various edge cases and therefore also mar...
   Author: Harsh J, 2013-08-06, 15:59
Re: Hadoop Source - Hadoop - [mail # user]
...Hi Sathwik,  You only need hadoop-common today. The other two are maintained for historic purposes when the repositories were split across projects.  We have some docs on this at h...
   Author: Harsh J, 2013-08-06, 08:27
[HADOOP-7659] fs -getmerge isn't guaranteed to work well over non-HDFS filesystems - Hadoop - [issue]
...When you use fs -getmerge with HDFS, you are guaranteed file list sorting (part-00000, part-00001, onwards). When you use the same with other FSes we bundle, the ordering of listing is not g...
http://issues.apache.org/jira/browse/HADOOP-7659    Author: Harsh J, 2013-08-06, 06:49
Re: DataBlockScanner's rate limit - Hadoop - [mail # user]
...Hi,  The DataBlockScanner isn't responsible for the DN block reports at startup, which is a wholly different thread/process - it is a NN independent operation that merely verifies block...
   Author: Harsh J, 2013-08-02, 03:27
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