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[HDFS-6245] datanode fails to start with a bad disk even when failed volumes is set - HDFS - [issue]
...Data node startup failed even when failed volumes was  set. Had to remove the bad disk from the config to get it to boot....
http://issues.apache.org/jira/browse/HDFS-6245    Author: Arpit Gupta, 2014-04-15, 00:11
[HDFS-6127] WebHDFS tokens cannot be renewed in HA setup - HDFS - [issue]
...TokenAspect class assumes that the service name of the token is alway a host-ip pair. In HA setup, however, the service name becomes the name service id, which breaks the assumption. As a re...
http://issues.apache.org/jira/browse/HDFS-6127    Author: Arpit Gupta, 2014-04-10, 14:12
[HDFS-6100] DataNodeWebHdfsMethods does not failover in HA mode - HDFS - [issue]
...In DataNodeWebHdfsMethods, the code creates a DFSClient to connect to the NN, so that it can access the files in the cluster. DataNodeWebHdfsMethods relies on the address passed in the URL t...
http://issues.apache.org/jira/browse/HDFS-6100    Author: Arpit Gupta, 2014-03-21, 21:20
[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-5132] Deadlock in NameNode between SafeModeMonitor#run and DatanodeManager#handleHeartbeat - HDFS - [issue]
...While running nn load generator with 15 threads for 20 mins the standby namenode deadlocked....
http://issues.apache.org/jira/browse/HDFS-5132    Author: Arpit Gupta, 2014-01-26, 08:03
[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
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