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[HDFS-6089] Standby NN while transitioning to active throws a connection refused error when the prior active NN process is suspended - HDFS - [issue]
...The following scenario was tested: Determine Active NN and suspend the process (kill -19) Wait about 60s to let the standby transition to active Get the service state for nn1 and nn2 and mak...
http://issues.apache.org/jira/browse/HDFS-6089    Author: Arpit Gupta, 2014-03-21, 15:06
[HDFS-6077] running slive with webhdfs on secure HA cluster fails with unkown host exception - HDFS - [issue]
...SliveTest fails with following.  See the comment for more logs.SliveTest: Unable to run job due to error:java.lang.IllegalArgumentException: java.net.UnknownHostException: ha-2-secure&n...
http://issues.apache.org/jira/browse/HDFS-6077    Author: Arpit Gupta, 2014-03-11, 14:59
[HDFS-5653] Log namenode hostname in various exceptions being thrown in a HA setup - HDFS - [issue]
...In a HA setup any time we see an exception such as safemode or namenode in standby etc we dont know which namenode it came from. The user has to go to the logs of the namenode and determine ...
http://issues.apache.org/jira/browse/HDFS-5653    Author: Arpit Gupta, 2014-03-05, 22:25
confirm expected HA behavior - HDFS - [mail # dev]
...HiI have a scenario where i am trying to test how HDFS HA works in case of network issues. I used iptables to block requests to the rpc port 8020 in order to simulate that. Below is the some...
   Author: Arpit Gupta, 2014-02-05, 22:28
[HDFS-5842] Cannot create hftp filesystem when using a proxy user ugi and a doAs on a secure cluster - HDFS - [issue]
...Noticed this while debugging issues in another application. We saw an error when trying to do a FileSystem.get using an hftp file system on a secure cluster using a proxy user ugi.This is a ...
http://issues.apache.org/jira/browse/HDFS-5842    Author: Arpit Gupta, 2014-01-28, 02:02
[HDFS-5322] HDFS delegation token not found in cache errors seen on secure HA clusters - HDFS - [issue]
...While running HA tests we have seen issues were we see HDFS delegation token not found in cache errors causing jobs running to fail.at org.apache.hadoop.security.UserGroupInformation.doAs(Us...
http://issues.apache.org/jira/browse/HDFS-5322    Author: Arpit Gupta, 2013-10-14, 18:18
[HDFS-5291] Clients need to retry when Active NN is in SafeMode - HDFS - [issue]
...In our test, we saw NN immediately went into safemode after transitioning to active state. This can cause HBase region server to timeout and kill itself. We should allow clients to retry whe...
http://issues.apache.org/jira/browse/HDFS-5291    Author: Arpit Gupta, 2013-10-13, 18:59
[HDFS-5335] DFSOutputStream#close() keeps throwing exceptions when it is called multiple times - HDFS - [issue]
...The semantic of DFSOutputStream#close() is incorrect.Close() will throw the last exception that it encounters during the flush operations when closing the stream. The exception that it remem...
http://issues.apache.org/jira/browse/HDFS-5335    Author: Arpit Gupta, 2013-10-12, 05:12
[HDFS-5123] Hftp should support namenode logical service names in URI - HDFS - [issue]
...For example if the dfs.nameservices is set to arpithdfs dfs -ls hftp://arpit:50070/tmpor hdfs dfs -ls hftp://arpit/tmpdoes not workYou have to provide the exact active namenode hostname. On ...
http://issues.apache.org/jira/browse/HDFS-5123    Author: Arpit Gupta, 2013-09-20, 21:21
[HDFS-5122] Support failover and retry in WebHdfsFileSystem for NN HA - HDFS - [issue]
...Bug reported by Arpit Gupta:If the dfs.nameservices is set to arpit,hdfs dfs -ls webhdfs://arpit/tmpdoes not work. You have to provide the exact active namenode hostname. On an HA cluster us...
http://issues.apache.org/jira/browse/HDFS-5122    Author: Arpit Gupta, 2013-09-19, 14:28
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