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RE: zookeeper in hadoop - Zookeeper - [mail # user]
...HDFS community is the right place to query this doubt. As I know NN uses ephemeral znodes to handle machine crashes and triggers watch event for switching standby to active.Regards,Rakesh...
   Author: Rakesh R, 2014-08-18, 16:05
RE: dynamic reconfiguration of zookeeper servers - Zookeeper - [mail # user]
...Hi,Yeah, dynamic configuration is supported in ZooKeeper 3.5.0-alpha release onwards. Please visit the below release:For ZooKeeper release details and downloads:http://zookeeper.apache.org/r...
   Author: Rakesh R, 2014-08-18, 08:10
RE: HBase client hangs after client-side OOM - Zookeeper - [mail # dev]
...Hi,ZK version is quite old. I could see ClientCnxn is only catching IOException and when there is OOME it will exit SendThread.I think, thats the reason for client hanging. Client side threa...
   Author: Rakesh R, 2014-08-14, 14:01
[ZOOKEEPER-1225] Successive invocation of LeaderElectionSupport.start() will bring the ELECTED node to READY and cause no one in ELECTED state. - Zookeeper - [issue]
...Presently there is no state validation for the start() api, so one can invoke multiple times consecutively. The second or further invocation will makes the client node to become 'READY' stat...
http://issues.apache.org/jira/browse/ZOOKEEPER-1225    Author: Rakesh R, 2014-08-02, 03:19
[ZOOKEEPER-1209] LeaderElection recipe doesn't handle the split-brain issue, n/w disconnection can bring both the client nodes to be in ELECTED - Zookeeper - [issue]
...Case1- N/w disconnection can bring both the client nodes to be in ELECTED state. Current LeaderElectionSupport(LES) f/w handles only 'NodeDeletion'.Consider the scenario where ELECTED and RE...
http://issues.apache.org/jira/browse/ZOOKEEPER-1209    Author: Rakesh R, 2014-08-02, 02:39
RE: ulimit changed with Apache Jenkins upgrade? - Zookeeper - [mail # dev]
...+1Adding one more point. I could see the following error too in the pre-commit build.     [exec]     [junit] Exception in thread "CommitProcWorkThread-16" java.lang....
   Author: Rakesh R, 2014-07-21, 05:32
PreCommit-ZOOKEEPER-Build failure - Zookeeper - [mail # dev]
...Hi,ZooKeeper pre-commit build is failing continuously in these days. Following test case is failing, is this related to system changes. Any hint ?https://builds.apache.org/job/PreCommit-ZOOK...
   Author: Rakesh R, 2014-07-20, 07:04
RE: Can a zookeeper client be made to influence the client-to-server heartbeats? - Zookeeper - [mail # user]
...Adding one more point...ZooKeeper heartbeat is actually used to show the liveliness of the zkclient-zkserver communication and there is no handle exposed to the application.Also, one can thi...
   Author: Rakesh R, 2014-07-08, 05:25
RE: ZooKeeper 3.5.0-alpha planning - Zookeeper - [mail # dev]
...I've just gone through the C library code checkins made in last two months (from April).Following are some of the related issues, probably this may give hints.Issue DateZOOKEEPER-1887 Apri...
   Author: Rakesh R, 2014-07-01, 07:10
RE: Best way to bundle zk in our product - Zookeeper - [mail # user]
...Hi Lahiru, I had embedded ZooKeeper server without any issues but not in the production cluster. I feel you can use it for day to day development phase.Its being used in ZK unit tests, pleas...
   Author: Rakesh R, 2014-06-26, 14:21
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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