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[HDFS-4455] Datanode sometimes gives up permanently on Namenode in HA setup - HDFS - [issue]
...Today we got ourselves into a situation where we hard killed the cluster (kill -9 across the board on all processes) and upon restarting all DNs would permanently give up on of the NNs in ou...
http://issues.apache.org/jira/browse/HDFS-4455    Author: Lars Hofhansl, 2014-05-18, 07:14
[HDFS-4345] Release resources of unpoolable Decompressors - HDFS - [issue]
...Found this when looking into HBASE-7435.When a Decompressor is returned to the pool in CodecPool.java, we should probably call end() on it to release its resources....
http://issues.apache.org/jira/browse/HDFS-4345    Author: Lars Hofhansl, 2012-12-28, 06:13
[HDFS-3979] Fix hsync semantics - HDFS - [issue]
...See discussion in HDFS-744. The actual sync/flush operation in BlockReceiver is not on a synchronous path from the DFSClient, hence it is possible that a DN loses data that it has already ac...
http://issues.apache.org/jira/browse/HDFS-3979    Author: Lars Hofhansl, 2012-11-09, 22:37
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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