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Re: cloudera vs apache hadoop migration stories ? - Hadoop - [mail # user]
...Hi Jay,  Probably makes sense to move this to the cdh-user list if you have any Cloudera-specific questions. But I just wanted to clarify: CDH doesn't make any API changes that aren't a...
   Author: Todd Lipcon, 2012-04-05, 08:45
[expand - 1 more] - Re: Requirements for patch review - Hadoop - [mail # dev]
...I filed HADOOP-8248 with a diff to the bylaws.  Thanks -Todd  On Wed, Apr 4, 2012 at 3:26 PM, Eli Collins  wrote:    Todd Lipcon Software Engineer, Cloudera...
   Author: Todd Lipcon, 2012-04-05, 01:13
[HADOOP-8245] Fix flakiness in TestZKFailoverController - Hadoop - [issue]
...When I loop TestZKFailoverController, I occasionally see two types of failures:1) the ZK JMXEnv issue (ZOOKEEPER-1438)2) TestZKFailoverController.testZooKeeperFailure fails with a timeoutThi...
http://issues.apache.org/jira/browse/HADOOP-8245    Author: Todd Lipcon, 2012-04-04, 19:21
[HADOOP-8243] Security support broken in CLI (manual) failover controller - Hadoop - [issue]
...Some recent refactoring accidentally caused the proxies in some places to get created with a default Configuration, instead of using the Configuration set up by the DFSHAAdmin tool. This cau...
http://issues.apache.org/jira/browse/HADOOP-8243    Author: Todd Lipcon, 2012-04-04, 14:13
[HADOOP-8215] Security support for ZK Failover controller - Hadoop - [issue]
...To keep the initial patches manageable, kerberos security is not currently supported in the ZKFC implementation. This JIRA is to support the following important pieces for security: integrat...
http://issues.apache.org/jira/browse/HADOOP-8215    Author: Todd Lipcon, 2012-04-03, 23:37
[HADOOP-8217] Edge case split-brain race in ZK-based auto-failover - Hadoop - [issue]
...As discussed in HADOOP-8206, the current design for automatic failover has the following race: ZKFC1 gets active lock ZKFC1 is about to send transitionToActive() and machine freezes (eg GC p...
http://issues.apache.org/jira/browse/HADOOP-8217    Author: Todd Lipcon, 2012-03-31, 01:55
[HADOOP-8228] Auto HA: Refactor tests and add stress tests - Hadoop - [issue]
...It's important that the ZKFailoverController be robust and not contain race conditions, etc. One strategy to find potential races is to add stress tests which exercise the code as fast as po...
http://issues.apache.org/jira/browse/HADOOP-8228    Author: Todd Lipcon, 2012-03-30, 20:31
[HADOOP-8220] ZKFailoverController doesn't handle failure to become active correctly - Hadoop - [issue]
...The ZKFC doesn't properly handle the case where the monitored service fails to become active. Currently, it catches the exception and logs a warning, but then continues on, after calling qui...
http://issues.apache.org/jira/browse/HADOOP-8220    Author: Todd Lipcon, 2012-03-30, 20:24
[HADOOP-8212] Improve ActiveStandbyElector's behavior when session expires - Hadoop - [issue]
...Currently when the ZK session expires, it results in a fatal error being sent to the application callback. This is not the best behavior – for example, in the case of HA, if ZK goes do...
http://issues.apache.org/jira/browse/HADOOP-8212    Author: Todd Lipcon, 2012-03-29, 21:48
Re: activity on IRC . - Hadoop - [mail # user]
...Hey Jay,  That's the only one I know of. Not a lot of idle chatter, but when people have questions, discussions do start up. Much more active during PST working hours, of course :) &nbs...
   Author: Todd Lipcon, 2012-03-28, 19:26
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