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[BIGTOP-1261] Smoke tests for the NameNode High Avaibility - Bigtop - [issue]
...If it is not considered to risky, it might be useful to prepare smoke tests for testing NameNode High Availability. We use such tests a little in my company (we have already implemented smok...
http://issues.apache.org/jira/browse/BIGTOP-1261    Author: Adam Kawa, 2015-03-27, 00:39
[MAPREDUCE-5660] Log info about possible thrashing (when using memory-based scheduling in Capacity Scheduler) is not printed - MapReduce - [issue]
...There is a tiny, but confusing when troubleshooting, bug in TaskTracker code:if (totalMemoryAllottedForTasks > totalPhysicalMemoryOnTT) {  LOG.info("totalMemoryAllottedForTasks ...
http://issues.apache.org/jira/browse/MAPREDUCE-5660    Author: Adam Kawa, 2015-03-21, 21:08
[YARN-2230] Fix description of yarn.scheduler.maximum-allocation-vcores in yarn-default.xml (or code) - YARN - [issue]
...When a user requests more vcores than the allocation limit (e.g. mapreduce.map.cpu.vcores  is larger than yarn.scheduler.maximum-allocation-vcores), then InvalidResourceRequestException...
http://issues.apache.org/jira/browse/YARN-2230    Author: Adam Kawa, 2015-01-08, 15:23
java.lang.RuntimeException: Unknown type BIGINT - Hive - [mail # user]
...Hi!When using Hive 0.14 (trunk from April 2014), I can't run queries on tableswith BIGINT partition column. I get:*FAILED: RuntimeException Unknown type BIGINT.*It runs runs nicely in Hive 0...
   Author: Adam Kawa, 2014-10-02, 12:27
Re: Start standby namenode using bootstrapStandby hangs - Hadoop - [mail # user]
...Hi,After throwing out above warning info, the execution of command hangs thereHave you tried to use *jstack* to check what the NameNode is really doing(e.g. whether it's blocked or waiting f...
   Author: Adam Kawa, 2014-09-20, 10:56
Swtiching from Java 6 to Java 7 on Hadoop 2.2.0 - Hadoop - [mail # user]
...Hi All!We are about to upgrade the Java version of our Hadoop cluster (Hadoop2.2.0). Just would like to ask about your recommendations and experience:(A) Should we schedule a downtime of a w...
   Author: Adam Kawa, 2014-09-15, 18:12
[expand - 2 more] - Re: CPU utilization - Hadoop - [mail # user]
...I mean the number of containers running on your NodeManager, not the jobitself. ...
   Author: Adam Kawa, 2014-09-12, 19:45
Re: MultipleTextOutputFormat in new api of 1.2.1? - Hadoop - [mail # user]
...Afaik, dynamic partitions in the new mapreduce API are actually notsupported (please read http://grepalex.com/2013/07/16/multipleoutputs-part2/andhttp://stackoverflow.com/questions/25503034/...
   Author: Adam Kawa, 2014-09-12, 17:03
[HIVE-5857] Reduce tasks do not work in uber mode in YARN - Hive - [issue]
...A Hive query fails when it tries to run a reduce task in uber mode in YARN.The NullPointerException is thrown in the ExecReducer.configure method, because the plan file (reduce.xml) for a re...
http://issues.apache.org/jira/browse/HIVE-5857    Author: Adam Kawa, 2014-09-04, 19:24
[expand - 1 more] - Re: YARN Logs - Hadoop - [mail # user]
...For example, the remote location is configuredvia yarn.nodemanager.remote-app-log-dir and defaults to "/tmp/logs".This is why, you see:*Logs not available at/tmp/logs/hadoop/logs/application...
   Author: Adam Kawa, 2014-07-15, 16:11
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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