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Re: Slow log splitting (Hbase 0.94.6) - HBase - [mail # user]
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...Sorry, forgot to mention that, we're using CDH4.3 so Hadoop 2.0.0 I'm not sure exactly what to look for in the namenode logs but grepping for "lease" only produced a handful of results...
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Author: Eran Kutner,
2013-06-18, 16:43
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Slow log splitting (Hbase 0.94.6) - HBase - [mail # user]
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...Hi, We had a brute force cluster shutdown event that was followed by log recovery when the cluster went back online. The cluster took hours to split the logs and recover the regions, all of ...
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Author: Eran Kutner,
2013-06-18, 12:11
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[HBASE-3996] Support multiple tables and scanners as input to the mapper in map/reduce jobs - HBase - [issue]
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...It seems that in many cases feeding data from multiple tables or multiple scanners on a single table can save a lot of time when running map/reduce jobs.I propose a new MultiTableInputFormat...
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http://issues.apache.org/jira/browse/HBASE-3996
Author: Eran Kutner,
2013-03-06, 13:13
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Re: Howto CopyTable from 0.90 to 0.92 ? - HBase - [mail # user]
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...Thanks J-D. It does help, I've been pulling my hair out trying to figure out what am I doing wrong. -eran On Wed, Jun 27, 2012 at 9:07 PM, Jean-Daniel Cryans wrote: ...
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Author: Eran Kutner,
2012-06-27, 18:17
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Howto CopyTable from 0.90 to 0.92 ? - HBase - [mail # user]
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...Hi, I can't figure out what to put in the rs.class and rs.impl in order to get CopyTable to copy from a 0.90 cluster to 0.92. Also, how should I reference the other cluster JAR? should I add...
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Author: Eran Kutner,
2012-06-27, 13:02
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Re: Occasional regionserver crashes following socket errors writing to HDFS - HBase - [mail # user]
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...Thanks Stack for noticing the ZooKeeper timeout, don't know how could I have missed that. After analyzing this for a while it is definitely unrelated to GC. In fact during the last 4 d...
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Author: Eran Kutner,
2012-05-24, 11:15
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Re: Occasional regionserver crashes following socket errors writing to HDFS - HBase - [mail # user]
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...Michale I appreciate the feedback but I'd have to disagree. In my case for example, I need to look at a complete set of data produced by the map phase in order to make a decision and write i...
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Author: Eran Kutner,
2012-05-10, 19:17
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Re: Occasional regionserver crashes following socket errors writing to HDFS - HBase - [mail # user]
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...Hi Mike, Not sure I understand the question about the reducer. I'm using a reducer because my M/R jobs require one and I want to write the result to Hbase. I have two tables I'm writing two,...
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Author: Eran Kutner,
2012-05-10, 12:22
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Re: Occasional regionserver crashes following socket errors writing to HDFS - HBase - [mail # user]
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...Thanks Igal, but we already have that setting. These are the relevant setting from hdfs-site.xml : dfs.datanode.max.xcievers 65536 &nbs...
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Author: Eran Kutner,
2012-05-10, 11:33
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Occasional regionserver crashes following socket errors writing to HDFS - HBase - [mail # user]
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...Hi, We're seeing occasional regionserver crashes during heavy write operations to Hbase (at the reduce phase of large M/R jobs). I have increased the file descriptors, HDFS xceivers, HDFS th...
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Author: Eran Kutner,
2012-05-10, 08:17
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