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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
[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-4594] WebHDFS open sets Content-Length header to what is specified by length parameter rather than how much data is actually returned. - HDFS - [issue]
...This was noticed on 2.0.3 alphaLets say we have a file of length xWe make an webhdfs open call specifying length=x+1The response of the call redirected to the datanode sets the content lengt...
http://issues.apache.org/jira/browse/HDFS-4594    Author: Arpit Gupta, 2013-09-25, 00:33
[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
[HDFS-5140] Too many safemode monitor threads being created in the standby namenode causing it to fail with out of memory error - HDFS - [issue]
...While running namenode load generator with 100 threads for 10 mins namenode was being failed over ever 2 mins.The standby namenode shut itself down as it ran out of memory and was not able t...
http://issues.apache.org/jira/browse/HDFS-5140    Author: Arpit Gupta, 2013-08-30, 15:45
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