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[HDFS-3727] When using SPNEGO, NN should not try to log in using KSSL principal - HDFS - [issue]
...When performing a checkpoint with security enabled, the NN will attempt to relogin from its keytab before making an HTTP request back to the 2NN to fetch the newly-merged image. However, it ...
http://issues.apache.org/jira/browse/HDFS-3727    Author: Aaron T. Myers, 2013-03-06, 09:55
Re: are the HDFS javadocs published on the website? - HDFS - [mail # dev]
...That sounds like a good plan to me.   Aaron T. Myers Software Engineer, Cloudera   On Sat, Feb 23, 2013 at 6:11 PM, Andrew Wang wrote:  ...
   Author: Aaron T. Myers, 2013-02-25, 19:19
[HDFS-4462] 2NN will fail to checkpoint after an HDFS upgrade from a pre-federation version of HDFS - HDFS - [issue]
...The 2NN currently has logic to detect when its on-disk FS metadata needs an upgrade with respect to the NN's metadata (i.e. the layout versions are different) and in this case it will procee...
http://issues.apache.org/jira/browse/HDFS-4462    Author: Aaron T. Myers, 2013-02-06, 12:40
[HDFS-4448] HA NN does not start with wildcard address configured for other NN when security is enabled - HDFS - [issue]
...Currently if one tries to configure HA NNs use the wildcard HTTP address when security is enabled, the NN will fail to start with an error like the following:java.lang.IllegalArgumentExcepti...
http://issues.apache.org/jira/browse/HDFS-4448    Author: Aaron T. Myers, 2013-01-30, 00:37
[HDFS-4315] DNs with multiple BPs can have BPOfferServices fail to start due to unsynchronized map access - HDFS - [issue]
...In some nightly test runs we've seen pretty frequent failures of TestWebHdfsWithMultipleNameNodes. I've traced the root cause to an unsynchronized map access in the DataStorage class.More de...
http://issues.apache.org/jira/browse/HDFS-4315    Author: Aaron T. Myers, 2012-12-18, 12:42
[HDFS-3236] NameNode does not initialize generic conf keys when started with -initializeSharedEditsDir - HDFS - [issue]
...This means that configurations that scope the location of the name/edits/shared edits dirs by nameserice or namenode won't work with `hdfs namenode -initializeSharedEdits'....
http://issues.apache.org/jira/browse/HDFS-3236    Author: Aaron T. Myers, 2012-12-05, 23:05
[HDFS-2875] Clean up LeaseManager#changeLease - HDFS - [issue]
...The code for LeaseManager#changeLease and the associated FSNamesystem#unprotectedChangeLease is very fragile, and can be improved in several ways....
http://issues.apache.org/jira/browse/HDFS-2875    Author: Aaron T. Myers, 2012-11-29, 16:05
Re: What is the reason that DataNode should configured the http and streamer port with a number under 1024 in secure mode? - HDFS - [mail # dev]
...Hi Xiaohan,  You're right that if a malicious user can get a fake DN to register with the NN then the low ports don't matter. However, in order for a user to get a malicious DN to regis...
   Author: Aaron T. Myers, 2012-11-16, 19:41
[HDFS-4158] FSDirectory#hasSnapshot will NPE when deleting an empty directory - HDFS - [issue]
...The method attempts to iterate over the child list of the directory, but that list may be null and this isn't handled currently....
http://issues.apache.org/jira/browse/HDFS-4158    Author: Aaron T. Myers, 2012-11-07, 19:43
[HDFS-2946] HA: Put a cap on the number of completed edits files retained by the NN - HDFS - [issue]
...HDFS-2794 added a minimum number of transactions to retain in edits files. Since many underlying file systems put a cap on the number of entries in a single directory, we should put a cap on...
http://issues.apache.org/jira/browse/HDFS-2946    Author: Aaron T. Myers, 2012-10-17, 14:21
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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