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Re: use setrep change number of file replicas,but not work - Hadoop - [mail # user]
...i set replica number from 3 to 2,but i dump NN metrics ,thePendingDeletionBlocks is zero ,why?if the check thread will sleep a interval then do it's check work ,how longthe interval time is?...
   Author: ch huang, 2014-04-11, 01:27
[HADOOP-9317] User cannot specify a kerberos keytab for commands - Hadoop - [issue]
...UserGroupInformation only allows kerberos users to be logged in via the ticket cache when running hadoop commands.  UGI allows a keytab to be used, but it's only exposed programatically...
http://issues.apache.org/jira/browse/HADOOP-9317    Author: Daryn Sharp, 2014-04-10, 22:49
[HADOOP-9852] UGI login user keytab and principal should not be static - Hadoop - [issue]
...The static keytab and principal for the login user is problematic.  The login conf explicitly references these statics.  As a result, loginUserFromKeytabAndReturnUGI is unnecessari...
http://issues.apache.org/jira/browse/HADOOP-9852    Author: Daryn Sharp, 2014-04-10, 22:42
[HADOOP-10471] Reduce the visibility of constants in ProxyUsers - Hadoop - [issue]
...Most of the constants in proxyusers have public visibility unnecessarily. These public constants should be set to private  and their external usage should be replaced by the correspondi...
http://issues.apache.org/jira/browse/HADOOP-10471    Author: Benoy Antony, 2014-04-10, 22:26
[HADOOP-10475] ConcurrentModificationException in AbstractDelegationTokenSelector.selectToken() - Hadoop - [issue]
...While running a hive job on a HA cluster saw ConcurrentModificationException in AbstractDelegationTokenSelector.selectToken()...
http://issues.apache.org/jira/browse/HADOOP-10475    Author: Arpit Gupta, 2014-04-10, 22:25
[HADOOP-10489] UserGroupInformation#getTokens and UserGroupInformation#addToken can lead to ConcurrentModificationException - Hadoop - [issue]
...Currently UserGroupInformation#getTokens and UserGroupInformation#addToken uses UGI's monitor to protect the iteration and modification of Credentials#tokenMap. Per discussion in HADOOP-1047...
http://issues.apache.org/jira/browse/HADOOP-10489    Author: Jing Zhao, 2014-04-10, 22:24
[HADOOP-9856] Avoid Krb5LoginModule.logout issue - Hadoop - [issue]
...The kerberos login module's logout method arguably has a bug.  Subject#getPrivateCredentials() returns a synchronized set.  Iterating the set requires explicitly locking the set. &...
http://issues.apache.org/jira/browse/HADOOP-9856    Author: Daryn Sharp, 2014-04-10, 21:50
[HADOOP-9749] Remove synchronization for UGI.getCurrentUser - Hadoop - [issue]
...HADOOP-7854 added synchronization to getCurrentUser due to ConcurrentModificationExceptions.  This degrades NN call handler performance.The problem was not well understood at the time, ...
http://issues.apache.org/jira/browse/HADOOP-9749    Author: Daryn Sharp, 2014-04-10, 21:48
[HADOOP-9747] Reduce unnecessary UGI synchronization - Hadoop - [issue]
...Jstacks of heavily loaded NNs show up to dozens of threads blocking in the UGI....
http://issues.apache.org/jira/browse/HADOOP-9747    Author: Daryn Sharp, 2014-04-10, 21:48
[HADOOP-10429] KeyStores should have methods to generate the materials themselves, KeyShell should use them - Hadoop - [issue]
...Currently, the KeyProvider API expects the caller to provide the key materials. And, the KeyShell generates key materials.For security reasons, KeyProvider implementations may want to genera...
http://issues.apache.org/jira/browse/HADOOP-10429    Author: Alejandro Abdelnur, 2014-04-10, 20:08
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