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[HADOOP-10978] HADOOP_IDENT_STRING is overriden in hadoop-env.sh - Hadoop - [issue]
...hadoop-env.sh forces HADOOP_IDENT_STRING to $USER possibly overriding a previously set value.Instead hadoop-env.sh should set HADOOP_IDENT_STRING to:export HADOOP_IDENT_STRING=${HADOOP_IDENT...
http://issues.apache.org/jira/browse/HADOOP-10978    Author: Mathias Herberts, 2014-08-26, 03:07
[HDFS-6857] Configuration key fs.homeDir is not taken into consideration when returning a user's home directory - HDFS - [issue]
...The fs.homeDir key is defined in org.apache.hadoop.fs.CommonConfigurationKeys as constant FS_HOME_DIR_KEY but the method org.apache.hadoop.fs.FileSystem#getHomeDirectory does not use it....
http://issues.apache.org/jira/browse/HDFS-6857    Author: Mathias Herberts, 2014-08-17, 03:17
[HBASE-3413] DNS Configs may completely break HBase cluster - HBase - [issue]
...I recently experienced a cluster malfunction which was caused by a change in DNS config for services co-hosted on the machines running region servers.The RS are specified using IP addresses ...
http://issues.apache.org/jira/browse/HBASE-3413    Author: Mathias Herberts, 2014-08-12, 20:19
[HBASE-11365] NavigableMap returned by a 'reversed' scanner has qualifiers ordered in the natural order and not the reversed one - HBase - [issue]
...Maybe this is a misconception on my side, but I assumed that the 'cells' returned by a reverse scanner (HBASE-4811) would be in reverse order, not just the rows.Was I wrong in my assumption?...
http://issues.apache.org/jira/browse/HBASE-11365    Author: Mathias Herberts, 2014-06-19, 07:29
[MAPREDUCE-3310] Custom grouping comparator cannot be set for Combiners - MapReduce - [issue]
...Combiners are often described as 'Reducers running on the Map side'.As Reducers, Combiners are fed <K,{V}>, where {V} is built by grouping values associated with the 'same' key.Fo...
http://issues.apache.org/jira/browse/MAPREDUCE-3310    Author: Mathias Herberts, 2014-02-24, 20:58
Re: [VOTE] Release Apache Hadoop 2.2.0 - Hadoop - [mail # dev]
...Kudos to all!   On Wed, Oct 16, 2013 at 6:35 AM, Arun C Murthy  wrote:  ...
   Author: Mathias Herberts, 2013-10-16, 07:04
[HBASE-9717] Allow filterRowKey to return a next key hint - HBase - [issue]
...The Filter interface has a filterRowKey method which returns a boolean set to true if the given row key should be filtered out.When a row key is filtered, it could be interesting to be able ...
http://issues.apache.org/jira/browse/HBASE-9717    Author: Mathias Herberts, 2013-10-11, 04:54
[expand - 1 more] - Re: Producer thread safety - Kafka - [mail # user]
...Please ignore this report, the problem was triggered by another threadclearing the list currently being sent.Sorry for the noise.On Thu, Sep 19, 2013 at 11:34 AM, Mathias Herberts <[EMAIL...
   Author: Mathias Herberts, 2013-09-19, 10:02
Time Metrics - HBase - [mail # dev]
...There are many occurrences of 'avg_time' metrics alongside 'num_ops' metrics, wouldn't it be wiser to have also a 'total_time' metric, so the average time could be computed on any interval b...
   Author: Mathias Herberts, 2013-09-10, 09:23
Metrics update - HBase - [mail # dev]
...Hi,  another thing I noticed, the 'fsBlockReadCacheHitCnt' metric does not increase monotonically, so I find the 'Cnt' name rather disturbing, it is a Cnt over a period, not an absolute...
   Author: Mathias Herberts, 2013-09-10, 08:43
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