[jira] [Updated] (ZOOKEEPER-1807) Observers spam each other creating connections to the election addr

["Michael Han (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/ZOOKEEPER-1807?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Michael Han updated ZOOKEEPER-1807:
-----------------------------------
    Fix Version/s:     (was: 3.5.3)
                   3.5.4

> Observers spam each other creating connections to the election addr
> -------------------------------------------------------------------
>
>                 Key: ZOOKEEPER-1807
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-1807
>             Project: ZooKeeper
>          Issue Type: Bug
>            Reporter: Raul Gutierrez Segales
>            Assignee: Alexander Shraer
>            Priority: Blocker
>             Fix For: 3.5.4, 3.6.0
>
>         Attachments: notifications-loop.png, ZOOKEEPER-1807-alex.patch, ZOOKEEPER-1807.patch, ZOOKEEPER-1807-ver2.patch, ZOOKEEPER-1807-ver3.patch, ZOOKEEPER-1807-ver4.patch, ZOOKEEPER-1807-ver5.patch, ZOOKEEPER-1807-ver6.patch, ZOOKEEPER-1807-ver7.patch
>
>
> Hey [~shralex],
> I noticed today that my Observers are spamming each other trying to open connections to the election port. I've got tons of these:
> {noformat}
> 2013-11-01 22:19:45,819 - DEBUG [WorkerSender[myid=13]] - There is a connection already for server 9
> 2013-11-01 22:19:45,819 - DEBUG [WorkerSender[myid=13]] - There is a connection already for server 10
> 2013-11-01 22:19:45,819 - DEBUG [WorkerSender[myid=13]] - There is a connection already for server 6
> 2013-11-01 22:19:45,819 - DEBUG [WorkerSender[myid=13]] - There is a connection already for server 12
> 2013-11-01 22:19:45,819 - DEBUG [WorkerSender[myid=13]] - There is a connection already for server 14
> {noformat}
> and so and so on ad nauseam. 
> Now, looking around I found this inside FastLeaderElection.java from when you committed ZOOKEEPER-107:
> {noformat}
>      private void sendNotifications() {
> -        for (QuorumServer server : self.getVotingView().values()) {
> -            long sid = server.id;
> -
> +        for (long sid : self.getAllKnownServerIds()) {
> +            QuorumVerifier qv = self.getQuorumVerifier();
> {noformat}
> Is that really desired? I suspect that is what's causing Observers to try to connect to each other (as opposed as just connecting to participants). I'll give it a try now and let you know. (Also, we use observer ids that are > 0, and I saw some parts of the code that might not deal with that assumption - so it could be that too..). 



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