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[expand - 2 more] - Auto clean DistCache? - MapReduce - [mail # user]
...Hi JM ,  Actually these dirs need to be purged by a script that keeps the last 2 days worth of files, Otherwise you may run into # of open files exceeds error.   Thanks   On M...
   Author: Abdelrhman Shettia , 2013-03-26, 19:53
why using mapreduce python scripts print more NULLs - Hive - [mail # user]
...Hi Andy ,   Can you view the data from the table by hadoop fs -text $tabledir/$filename? The data may be corrupted or the filed delimiter is mixed with the data used in the transform sc...
   Author: Abdelrhman Shettia , 2013-03-26, 18:08
Question about how to add the debug info into the hive core jar - Hive - [mail # user]
...Hi Yong,   Have you tried running the H query in debug mode. Hive log level can be changed by passing the following conf while hive client is running.    #hive -hiveconf hive....
   Author: Abdelrhman Shettia , 2013-03-21, 00:35
Hive 0.10.0 metastore thrift server installation error - Hive - [mail # user]
...Hi Shangzhong,   Usually after the upgrade that you have done there will be hive upgrade script for the metadata that needs to executed. Try to search for it in the hive libs. Once you ...
   Author: Abdelrhman Shettia , 2013-03-15, 00:03
Hive query started map task being killed during execution - Hive - [mail # user]
...Hi Dileep,   Have tried to se the following values in hive and run the query again.  More info why the query may fail in the following link :   https://cwiki.apache.org/Hive/s...
   Author: Abdelrhman Shettia , 2013-03-09, 00:05
[expand - 2 more] - location of log files for mapreduce job run through eclipse - MapReduce - [mail # user]
...Hi Sayan ,   May want to try to use the log4j in hadoop and place it with the packages/jars and validate it matches the one in the cluster or print it to the console .  I came acro...
   Author: Abdelrhman Shettia , 2013-03-07, 19:07
[expand - 2 more] - mapred.max.tracker.failures - MapReduce - [mail # user]
...Hi Mohit ,   This is The number of failed tasks in specified job after which the job will not run on the task tracker. The job's tasks will no longer be assigned to the task tracker. Ho...
   Author: Abdelrhman Shettia , 2013-03-07, 06:02
[expand - 2 more] - Reading partitioned sequence file from hdfs throws filenotfoundexception - MapReduce - [mail # user]
...Hi All ,   Try to give the full path for the file such as :   > /users/ivanovd/1.2a8b1a9c-47de-4631-8013-f0dd3e096036.cvsp/part-r-00000  if the job is producing lots of fil...
   Author: Abdelrhman Shettia , 2013-03-07, 05:56
No such file or directory error on simple query - Hive - [mail # user]
...Hi Stephan ,   Please use the following  desc extended to see where is the table' s directory on hdfs. Here is an example.   hive -e "desc extended hcatsmokeid0b0abc02_date252...
   Author: Abdelrhman Shettia , 2013-03-05, 00:31
A bug of auto convert join with intermediate table? - Hive - [mail # user]
...Hi Zhong,   It is possible that you are facing the following hive bug? You may want to upgrade the current hive client.     https://issues.apache.org/jira/browse/HIVE-2095 &nb...
   Author: Abdelrhman Shettia , 2013-02-06, 20:40