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[HDFS-5029] Token operations should not block read operations - HDFS - [issue]
...Token operations unnecessarily obtain the write lock on the namespace.  Edits for token operations are independent of edits for other namespace write operations, and the edits have no o...
http://issues.apache.org/jira/browse/HDFS-5029    Author: Daryn Sharp, 2013-09-06, 19:30
Re: [VOTE] Release Apache Hadoop 2.1.0-beta - HDFS - [mail # dev]
...I broke RPC QOP for integrity and privacy options. :(  See blocker HADOOP-9816.  I think I understand the problem and it shouldn't be hard to fix.  The bug went unnoticed beca...
   Author: Daryn Sharp, 2013-08-01, 16:38
Re: Why Hadoop force using DNS? - HDFS - [mail # user]
...One reason is the lists to accept or reject DN accepts hostnames.  If dns temporarily can't resolve an IP then an unauthorized DN might slip back into the cluster, or a decommissioning ...
   Author: Daryn Sharp, 2013-07-29, 13:48
[HDFS-4690] Namenode exits if entering safemode while secret manager is edit logging - HDFS - [issue]
...Going into safemode involves stopping the secret manager's thread.  An interrupt is sent to this thread.  If this occurs while the thread is logging an edit, the resulting exceptio...
http://issues.apache.org/jira/browse/HDFS-4690    Author: Daryn Sharp, 2013-06-05, 15:45
[HDFS-4805] Webhdfs client is fragile to token renewal errors - HDFS - [issue]
...Webhdfs internally acquires a token that will be used for DN-based operations.  The token renewer in common will try to renew that token.  If a renewal fails for any reason, it wil...
http://issues.apache.org/jira/browse/HDFS-4805    Author: Daryn Sharp, 2013-05-20, 17:22
[HDFS-3180] Add socket timeouts to webhdfs - HDFS - [issue]
...WebHDFS connections may indefinitely hang due to no timeouts on the connection.  WebHDFS should be adapted in a similar fashion to HDFS-3166 for hftp....
http://issues.apache.org/jira/browse/HDFS-3180    Author: Daryn Sharp, 2013-05-15, 15:06
[HDFS-4766] Enable NN spnego filters only if kerberos is enabled - HDFS - [issue]
...Counter-part to HADOOP-9516 to only enable SPNEGO if kerberos is enabled....
http://issues.apache.org/jira/browse/HDFS-4766    Author: Daryn Sharp, 2013-04-30, 17:55
[HDFS-4548] Webhdfs doesn't renegotiate SPNEGO token - HDFS - [issue]
...When the webhdfs SPNEGO token expires, the fs doesn't attempt to renegotiate a new SPNEGO token.  This renders webhdfs unusable for daemons that are logged in via a keytab which would a...
http://issues.apache.org/jira/browse/HDFS-4548    Author: Daryn Sharp, 2013-04-26, 03:14
[HDFS-4577] Webhdfs operations should declare if authentication is required - HDFS - [issue]
...Multiple hardcoded conditionals for operations can be avoided in webhdfs if the methods declare if authentication (ie. cannot use a token) is required....
http://issues.apache.org/jira/browse/HDFS-4577    Author: Daryn Sharp, 2013-04-26, 03:14
[HDFS-4567] Webhdfs does not need a token for token operations - HDFS - [issue]
...Webhdfs will implicitly acquire a token to get/renew/cancel other tokens even though it neither needs nor uses the token.  The implicit token triggers a renewer thread for the fs which ...
http://issues.apache.org/jira/browse/HDFS-4567    Author: Daryn Sharp, 2013-04-26, 03:14
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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