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[HDFS-3623] BKJM: zkLatchWaitTimeout hard coded to 6000. Make use of ZKSessionTimeout instead. - HDFS - [issue]
...if (!zkConnectLatch.await(6000, TimeUnit.MILLISECONDS)) {we can make use of session timeout instead of hardcoding this value....
http://issues.apache.org/jira/browse/HDFS-3623    Author: Uma Maheswara Rao G, 2012-11-16, 13:21
[HDFS-3616] TestWebHdfsWithMultipleNameNodes fails with ConcurrentModificationException in DN shutdown - HDFS - [issue]
...I have seen this in precommit build #2743java.util.ConcurrentModificationException at java.util.HashMap$HashIterator.nextEntry(HashMap.java:793) at java.util.HashMap$EntryIterator.next(HashM...
http://issues.apache.org/jira/browse/HDFS-3616    Author: Uma Maheswara Rao G, 2012-10-27, 15:00
RE: The lease hard limit is 1 hour and in another client want to append to a file need to wait for 1 hour? - HDFS - [mail # dev]
...Hi,   I am assuming that your actual client crashed. and another Client wants to  append to same file which not closed by previous client.  Generally we will append to the fil...
   Author: Uma Maheswara Rao G, 2012-10-18, 09:17
RE: [DISCUSS] Increasing the default block size - HDFS - [mail # dev]
...+1 for increasing it to higher value by defaut (128/256MB)  Most of the deployment which I worked are configured with 256MB and workin g well. ________________________________________ F...
   Author: Uma Maheswara Rao G, 2012-10-16, 06:23
[HDFS-2494] [webhdfs] When Getting the file using OP=OPEN with DN http address, ESTABLISHED sockets are growing. - HDFS - [issue]
...As part of the reliable test,Scenario:Initially check the socket count. ---there are aroud 42 sockets are there.open the file with DataNode http address using op=OPEN request parameter about...
http://issues.apache.org/jira/browse/HDFS-2494    Author: Uma Maheswara Rao G, 2012-09-12, 03:04
[Updated] RE: current direction in namenode HA - HDFS - [mail # dev]
...My previous reply messed up the options numbering, It may confuse some peop le. I am resending it again by correcting that. Appologies for confusions.      If you can invest o...
   Author: Uma Maheswara Rao G, 2012-09-05, 04:56
[expand - 1 more] - Re: current direction in namenode HA - HDFS - [mail # dev]
...small correction:   This is for your Option 4:    you can take a look at HDFS-3077    In this umbrella JIRA, work is going actively.  @Ted, thanks for adding th...
   Author: Uma Maheswara Rao G, 2012-09-04, 23:17
[HDFS-3287] 'hdfs -format' should be able to initialize non-file journal managers. - HDFS - [issue]
...This is the JIRA to support the formatting of shared dirs.for more details see HDFS-3275....
http://issues.apache.org/jira/browse/HDFS-3287    Author: Uma Maheswara Rao G, 2012-08-01, 14:07
Block missing issues in stress testing - HDFS - [mail # dev]
...Hi Devs,   We have seen couple of Block missing issues in stress testing. ( mostly al l were with default configurations )   1) HDFS-3584 Blocks are getting marked as corrupt with ...
   Author: Uma Maheswara Rao G, 2012-07-20, 18:47
[HDFS-2827] Cannot save namespace after renaming a directory above a file with an open lease - HDFS - [issue]
...When i execute the following operations and wait for checkpoint to complete.fs.mkdirs(new Path("/test1"));FSDataOutputStream create = fs.create(new Path("/test/abc.txt")); //dont closefs.ren...
http://issues.apache.org/jira/browse/HDFS-2827    Author: Uma Maheswara Rao G, 2012-07-10, 19:13
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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