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[HDFS-6735] A minor optimization to avoid pread() be blocked by read() inside the same DFSInputStream - HDFS - [issue]
...In current DFSInputStream impl, there're a couple of coarser-grained locks in read/pread path, and it has became a HBase read latency pain point so far. In HDFS-6698, i made a minor patch ag...
http://issues.apache.org/jira/browse/HDFS-6735    Author: Liang Xie, 2014-12-13, 00:44
[HDFS-7519] Support for a Reconfigurable NameNode - HDFS - [issue]
...The DataNode gained the use of the "Reconfigurable" code in HDFS-6727.  The purpose of this jira is to also use the Reconfigurable code in the Namenode.Use cases: Take the variety of re...
http://issues.apache.org/jira/browse/HDFS-7519    Author: Mike Yoder, 2014-12-13, 00:38
[HDFS-7271] Find a way to make encryption zone deletion work with HDFS trash. - HDFS - [issue]
...Currently when HDFS trash is enabled, deletion of encryption zone will have issue:rmr: Failed to move to trash: ... can't be moved from an encryption zone.A simple way is to add ignore trash...
http://issues.apache.org/jira/browse/HDFS-7271    Author: Yi Liu, 2014-12-12, 23:50
[HDFS-7491] Add incremental blockreport latency to DN metrics - HDFS - [issue]
...In a busy cluster, IBR processing could be delayed due to NN FSNamesystem lock and cause NN to throw NotReplicatedYetException to DFSClient and thus increase the overall application latency....
http://issues.apache.org/jira/browse/HDFS-7491    Author: Ming Ma, 2014-12-12, 23:17
[HDFS-7212] Huge number of BLOCKED threads rendering DataNodes useless - HDFS - [issue]
...There are 3000 - 8000 threads in each datanode JVM, blocking the entire VM and rendering the service unusable, missing heartbeats and stopping data access. The threads look like this:3415 (s...
http://issues.apache.org/jira/browse/HDFS-7212    Author: Istvan Szukacs, 2014-12-12, 21:38
[HDFS-7400] More reliable namenode health check to detect OS/HW issues - HDFS - [issue]
...We had this scenario on an active NN machine. Disk array controller firmware has a bug. So disks stop working. ZKFC and NN still considered the node healthy; Communications between ZKFC and ...
http://issues.apache.org/jira/browse/HDFS-7400    Author: Ming Ma, 2014-12-12, 21:38
[HDFS-7067] ClassCastException while using a key created by keytool to create encryption zone. - HDFS - [issue]
...I'm using transparent encryption. If I create a key for KMS keystore via keytool and use the key to create an encryption zone. I get a ClassCastException rather than an exception with decent...
http://issues.apache.org/jira/browse/HDFS-7067    Author: Yi Yao, 2014-12-12, 18:48
[HDFS-7515] Fix new findbugs warnings in hadoop-hdfs - HDFS - [issue]
...The following findbugs warnings need to be fixed:[INFO] --- findbugs-maven-plugin:2.5.3:check (default-cli) @ hadoop-hdfs ---[INFO] BugInstance size is 14[INFO] Error size is 0[INFO] Total b...
http://issues.apache.org/jira/browse/HDFS-7515    Author: Haohui Mai, 2014-12-12, 15:30
[HDFS-7449] Add metrics to NFS gateway - HDFS - [issue]
...Add metrics to collect the NFSv3 handler operations, response time and etc....
http://issues.apache.org/jira/browse/HDFS-7449    Author: Brandon Li, 2014-12-12, 15:30
[HDFS-7497] Inconsistent report of decommissioning DataNodes between dfsadmin and NameNode webui - HDFS - [issue]
...It's observed that dfsadmin report list DNs in the decomm state while NN UI list DNs in dead state.I found what happens is:NN webui uses two steps to get the result: first collect a list of ...
http://issues.apache.org/jira/browse/HDFS-7497    Author: Yongjun Zhang, 2014-12-12, 15:30
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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