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JNI native-method warning in HDP 2.0 - Hadoop - [mail # user]
...We are seeing a warning deep in HDFS code, I was wondering if anyone knows of this or if a JIRA has been filed or fixed?  Searching on the warning text didn't crop up anything.  It...
   Author: John Lilley, 2014-10-16, 19:06
[expand - 1 more] - RE: Issue with Hadoop/Kerberos security as client - Hadoop - [mail # user]
...Follow-up: problem seem to be solved.The issue is purely a JNI issue and actually doesn't have anything to do with security per se.  Calling vm->AttachCurrentThread() sets the contex...
   Author: John Lilley, 2014-09-18, 22:52
[expand - 1 more] - RE: How can I increase the speed balancing? - Hadoop - [mail # user]
...Srikanth,The cluster is idle while balancing, and it seems to move about 2MB/minute.  There is no discernable CPU load.johnFrom: Srikanth upputuri [mailto:[EMAIL PROTECTED]]Sent: Thursd...
   Author: John Lilley, 2014-09-16, 11:18
RE: HDFS balance - Hadoop - [mail # user]
...Can you run the load from an "edge node" that is not a DataNode?johnJohn LilleyChief Architect, RedPoint Global Inc.1515 Walnut Street | Suite 300 | Boulder, CO 80302T: +1 303 541 1516  | M:...
   Author: John Lilley, 2014-09-03, 14:51
[expand - 2 more] - RE: YARN userapp cache lifetime: can't find core dump - Hadoop - [mail # user]
...I think I found it:yarn.nodemanager.delete.debug-delay-secFrom: John Lilley [mailto:[EMAIL PROTECTED]]Sent: Tuesday, September 02, 2014 2:02 PMTo: '[EMAIL PROTECTED]'Subject: YARN userapp ca...
   Author: John Lilley, 2014-09-02, 21:29
[expand - 2 more] - RE: winutils and security - Hadoop - [mail # user]
...One more follow up, in case someone stumbles across this in the future.  From what we can tell, the Hadoop security initialization is very sensitive to startup order, and this has been ...
   Author: John Lilley, 2014-08-27, 01:00
RE: Issues with documentation on YARN - Hadoop - [mail # user]
...The only way we've found to write an application master is by example. However, the distributed-shell example in 2.2 was not very good; it is much improved in 2.4.  I would start with t...
   Author: John Lilley, 2014-07-27, 20:44
optimizing HDFS writes with replication=1 - Hadoop - [mail # user]
...I am writing temp files to HDFS with replication=1, so I expect the blocks to be stored on the writing node.  Are there any tips, in general, for optimizing write performance to HDFS? &...
   Author: John Lilley, 2014-01-22, 00:10
FileSystem iterative or limited alternative to listStatus() - Hadoop - [mail # user]
...Is there an HDFS file system method for listing a directory contents iteratively, or at least stopping at some limit?  We have an application in which the user can type wildcards, which...
   Author: John Lilley, 2014-01-11, 23:52
How to make AM terminate if client crashes? - Hadoop - [mail # user]
...We have a YARN application that we want to automatically terminate if the YARN client disconnects or crashes.  Is it possible to configure the YarnClient-RM connection so that if the cl...
   Author: John Lilley, 2014-01-11, 19:37
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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