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[HDFS-2825] Add test hook to turn off the writer preferring its local DN - HDFS - [issue]
...Currently, the default block placement policy always places the first replica in the pipeline on the local node if there is a valid DN running there. In some network designs, within-rack ban...
http://issues.apache.org/jira/browse/HDFS-2825    Author: Todd Lipcon, 2014-12-16, 19:19
[MAPREDUCE-6068] Illegal progress value warnings in map tasks - MapReduce - [issue]
...When running a terasort on latest trunk, I see the following in my task logs:2014-09-02 17:42:28,437 INFO [main] org.apache.hadoop.mapred.MapTask: Map output collector class = org.apache.had...
http://issues.apache.org/jira/browse/MAPREDUCE-6068    Author: Todd Lipcon, 2014-12-15, 03:54
[MAPREDUCE-5974] Allow specifying multiple MapOutputCollectors with fallback - MapReduce - [issue]
...Currently we only allow specifying a single MapOutputCollector implementation class in a job. It would be nice to allow a comma-separated list of classes: we should try each collector implem...
http://issues.apache.org/jira/browse/MAPREDUCE-5974    Author: Todd Lipcon, 2014-12-14, 04:22
[HADOOP-7154] Should set MALLOC_ARENA_MAX in hadoop-config.sh - Hadoop - [issue]
...New versions of glibc present in RHEL6 include a new arena allocator design. In several clusters we've seen this new allocator cause huge amounts of virtual memory to be used, since when mul...
http://issues.apache.org/jira/browse/HADOOP-7154    Author: Todd Lipcon, 2014-12-12, 14:15
[HDFS-3519] Checkpoint upload may interfere with a concurrent saveNamespace - HDFS - [issue]
...TestStandbyCheckpoints failed in precommit build 2620 due to the following issue: both nodes were in Standby state, and configured to checkpoint "as fast as possible" NN1 starts to save its ...
http://issues.apache.org/jira/browse/HDFS-3519    Author: Todd Lipcon, 2014-11-14, 22:29
[HDFS-3342] SocketTimeoutException in BlockSender.sendChunks could have a better error message - HDFS - [issue]
...Currently, if a client connects to a DN and begins to read a block, but then stops calling read() for a long period of time, the DN will log a SocketTimeoutException "480000 millis timeout w...
http://issues.apache.org/jira/browse/HDFS-3342    Author: Todd Lipcon, 2014-10-31, 15:15
[HBASE-2739] Master should fail to start if it cannot successfully split logs - HBase - [issue]
...In trunk, in splitLogAfterStartup(), we log the error splitting, but don't shut down. Depending on configuration, we should probably shut down here rather than continue with dataloss.In 0.20...
http://issues.apache.org/jira/browse/HBASE-2739    Author: Todd Lipcon, 2014-10-30, 14:40
[HDFS-4176] EditLogTailer should call rollEdits with a timeout - HDFS - [issue]
...When the EditLogTailer thread calls rollEdits() on the active NN via RPC, it currently does so without a timeout. So, if the active NN has frozen (but not actually crashed), this call can ha...
http://issues.apache.org/jira/browse/HDFS-4176    Author: Todd Lipcon, 2014-10-30, 07:58
Re: Git repo ready to use - Hadoop - [mail # dev]
...Hey all,For those of you who like to see the entire history of a file going back to2006, I found I had to add a new graft to .git/info/grafts:# Project un-split in new writable git repoa1967...
   Author: Todd Lipcon, 2014-09-15, 18:21
[expand - 1 more] - Re: [VOTE] Merge branch MAPREDUCE-2841 to trunk - MapReduce - [mail # dev]
...With four committer +1s, this vote passes.I'll take care of merging this to trunk either later tonight or over theweekend.Thanks to all of the contributors who helped with this work!-Todd&nb...
   Author: Todd Lipcon, 2014-09-13, 01:31
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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