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[HDFS-4587] Webhdfs secure clients are incompatible with non-secure NN - HDFS - [issue]
...A secure webhdfs client will receive an exception from a non-secure NN.  For a NN in non-secure mode, FSNamesystem#getDelegationToken will return "null" to indicate no token is required...
http://issues.apache.org/jira/browse/HDFS-4587    Author: Daryn Sharp, 2014-04-14, 15:11
[HDFS-4576] Webhdfs authentication issues - HDFS - [issue]
...Umbrella jira to track the webhdfs authentication issues as subtasks....
http://issues.apache.org/jira/browse/HDFS-4576    Author: Daryn Sharp, 2014-04-14, 15:09
[HDFS-4564] Webhdfs returns incorrect http response codes for denied operations - HDFS - [issue]
...Webhdfs is returning 401 (Unauthorized) instead of 403 (Forbidden) when it's denying operations.  Examples including rejecting invalid proxy user attempts and renew/cancel with an inval...
http://issues.apache.org/jira/browse/HDFS-4564    Author: Daryn Sharp, 2014-04-07, 19:24
[HDFS-1751] Intrinsic limits for HDFS files, directories - HDFS - [issue]
...Enforce a configurable limit on:  the length of a path component  the number of names in a directoryThe intention is to prevent a too-long name or a too-full directory. T...
http://issues.apache.org/jira/browse/HDFS-1751    Author: Daryn Sharp, 2014-03-12, 21:50
[HDFS-5681] renewLease should not hold fsn write lock - HDFS - [issue]
...Lease renewals unnecessarily hold the write lock which reduces throughput.  Currently the fsn lock doubles as an "operational lock" to prevent state transitions.  If the lease mana...
http://issues.apache.org/jira/browse/HDFS-5681    Author: Daryn Sharp, 2014-02-15, 19:02
[HDFS-5946] Webhdfs DN choosing code is flawed - HDFS - [issue]
...HDFS-5891 improved the performance of redirecting webhdfs clients to a DN.  Instead of attempting a connection with a 1-minute timeout, the NN skips decommissioned nodes.The logic appea...
http://issues.apache.org/jira/browse/HDFS-5946    Author: Daryn Sharp, 2014-02-13, 20:11
[HDFS-5947] Improve dead node detection and handling - HDFS - [issue]
...When HeartbeatManager.heartbeatCheck runs: All DNs are scanned to count dead nodes Processes the first dead node If there was a dead node, loops to re-scan all DNs againProcessing the dead n...
http://issues.apache.org/jira/browse/HDFS-5947    Author: Daryn Sharp, 2014-02-13, 16:12
[HDFS-5875] Add iterator support to INodesInPath - HDFS - [issue]
..."Resolve as you go" inode iteration will help with the implementation of alternative locking schemes.  It will also be the pre-cursor for resolving paths once and only once per operatio...
http://issues.apache.org/jira/browse/HDFS-5875    Author: Daryn Sharp, 2014-02-04, 03:29
[HDFS-5514] FSNamesystem's fsLock should allow custom implementation - HDFS - [issue]
...Changing fsLock from a ReentrantReadWriteLock to an API compatible class that encapsulates the rwLock will allow for more sophisticated locking implementations such as fine grain locking....
http://issues.apache.org/jira/browse/HDFS-5514    Author: Daryn Sharp, 2014-01-28, 23:36
[HDFS-5241] Provide alternate queuing audit logger to reduce logging contention - HDFS - [issue]
...The default audit logger has extremely poor performance.  The internal synchronization of log4j causes massive contention between the call handlers (100 by default) which drastically li...
http://issues.apache.org/jira/browse/HDFS-5241    Author: Daryn Sharp, 2014-01-25, 13:38
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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