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[HDFS-6050] NFS does not handle exceptions correctly in a few places - HDFS - [issue]
...I noticed this file does not log exceptions appropriately in multiple locations.Not logging the stack of Throwable:https://github.com/apache/hadoop-common/blob/f567f09091368fe800f3f70605da38...
http://issues.apache.org/jira/browse/HDFS-6050    Author: Brock Noland, 2014-05-31, 00:47
[HDFS-4229] HDFS can report negative DFS Used on clusters with very small amounts of data - HDFS - [issue]
...I had a near empty HDFS instance where I was creating a file and deleting it very quickly. I noticed that HDFS sometimes reported a negative DFS used.root@brock0-1 ~]# sudo -u hdfs -i hdfs d...
http://issues.apache.org/jira/browse/HDFS-4229    Author: Brock Noland, 2012-12-15, 18:23
Re: Calling C inside MR - HDFS - [mail # user]
...Hi,  Here is an example of how to call native methods from Java in a MR context:  https://github.com/brockn/hadoop-thumbnail  The most important item IMHO is that you have a c...
   Author: Brock Noland, 2012-12-03, 15:56
Re: Unsatisfied link error - how to load native library without copying it in /lib/native folder - HDFS - [mail # user]
...1) Does your local program use the native library before submitting the job to the cluster?  Here is an example of using native code in MR https://github.com/brockn/hadoop-thumbnail &nb...
   Author: Brock Noland, 2012-10-26, 00:59
Re: Understanding compression in hdfs - HDFS - [mail # user]
...Also note that HDFS already does checksums which I believe you can retrieve:  http://hadoop.apache.org/common/docs/r1.0.3/api/org/apache/hadoop/fs/FileSystem.html#getFileChecksum(org.ap...
   Author: Brock Noland, 2012-07-29, 17:41
[HDFS-3575] HttpFS does not log Exception Stacktraces - HDFS - [issue]
...In the 'log' method of the HttpFSExceptionProvider we log exceptions as "warn" but the stacktrace itself is not logged:    LOG.warn("[{}:{}] response [{}] {}",...
http://issues.apache.org/jira/browse/HDFS-3575    Author: Brock Noland, 2012-07-05, 14:03
Re: random seeks during write in HDFS - HDFS - [mail # user]
...Hi,  This question is for hdfs-user not mapreduce-user, as such I have removed them.  Yes HDFS does not allow ramdom writes. I suggest your read this doc: http://hadoop.apache.org/...
   Author: Brock Noland, 2012-03-17, 14:50
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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