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[HDFS-1490] TransferFSImage should timeout - HDFS - [issue]
...Sometimes when primary crashes during image transfer secondary namenode would hang trying to read the image from HTTP connection forever.It would be great to set timeouts on the connection s...
http://issues.apache.org/jira/browse/HDFS-1490    Author: Dmytro Molkov, 2014-09-04, 01:59
[HDFS-1105] Balancer improvement - HDFS - [issue]
...We were seeing some weird issues with the balancer in our cluster:1) it can get stuck during an iteration and only restarting it helps2) the iterations are highly inefficient. With 20 minute...
http://issues.apache.org/jira/browse/HDFS-1105    Author: Dmytro Molkov, 2014-07-30, 19:10
[HDFS-1194] Secondary namenode fails to fetch the image from the primary - HDFS - [issue]
...We just hit the problem described in HDFS-1024 again.After more investigation of the underlying problems with CancelledKeyException there are some findings:One of the symptoms: the transfer ...
http://issues.apache.org/jira/browse/HDFS-1194    Author: Dmytro Molkov, 2013-09-17, 19:21
[HDFS-1775] getContentSummary should hold the FSNamesystem readlock - HDFS - [issue]
...Right now the getContentSummary call on the namenode only holds the FSDirectory lock, but not the FSNamesystem lock. What we are seeing because of that is: 1) getContentSummary takes the rea...
http://issues.apache.org/jira/browse/HDFS-1775    Author: Dmytro Molkov, 2013-07-12, 19:34
[HDFS-1245] Plugable block id generation - HDFS - [issue]
...The idea is to have a way to easily create block id generation engines that may fit a certain purpose. One of them could be HDFS-898 started by Konstantin, but potentially others.We chatted ...
http://issues.apache.org/jira/browse/HDFS-1245    Author: Dmytro Molkov, 2013-01-13, 13:21
[HDFS-1558] Optimize FSNamesystem.startFileInternal - HDFS - [issue]
...Currently on file creation inside of FSNamesystem.startFileInternal there are three calls to FSDirectory that are essentially the same:dir.exists(src)dir.isDir(src)dir.getFileInode(src)All o...
http://issues.apache.org/jira/browse/HDFS-1558    Author: Dmytro Molkov, 2012-12-28, 19:54
[HDFS-1109] HFTP and URL Encoding - HDFS - [issue]
...We just saw this error happen in our cluster. If there is a file that has a "+" sign in the name it is not readable through HFTP protocol.The problem is when we are reading a file with HFTP ...
http://issues.apache.org/jira/browse/HDFS-1109    Author: Dmytro Molkov, 2012-08-29, 08:32
[HDFS-1143] Implement Background deletion - HDFS - [issue]
...Right now if you try to delete massive number of files from the namenode it will freeze (sometimes for minutes). Most of the time is spent going through the blocks map and invalidating all t...
http://issues.apache.org/jira/browse/HDFS-1143    Author: Dmytro Molkov, 2012-07-10, 21:46
Re: Avatar Datanodes - HDFS - [mail # dev]
...No, only the "active" namenode sends commands back to the datanodes in avat ar node setup.  On Aug 9, 2010, at 5:05 PM, AndrĂ© Oriani <[EMAIL PROTECTED]  des html) oth so,...
   Author: Dmytro Molkov, 2010-08-10, 03:07
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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