curator-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Scott Blum (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CURATOR-125) ConnectionStateListener is confused by READ_ONLY state
Date Mon, 28 Jul 2014 18:48:38 GMT

    [ https://issues.apache.org/jira/browse/CURATOR-125?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14076573#comment-14076573
] 

Scott Blum commented on CURATOR-125:
------------------------------------

Please delete the above 3 comments (and this one) opened a PR with the wrong number.

> ConnectionStateListener is confused by READ_ONLY state
> ------------------------------------------------------
>
>                 Key: CURATOR-125
>                 URL: https://issues.apache.org/jira/browse/CURATOR-125
>             Project: Apache Curator
>          Issue Type: Bug
>          Components: Client
>    Affects Versions: 2.6.0
>         Environment: Ubuntu 12.04
> 3 ZK with readonlymode.enabled
>            Reporter: Benjamin Jaton
>         Attachments: Test.java
>
>
> To reproduce:
> - have a 3 nodes ZK ensemble with readonlymode.enabled
> - shut down 2 of the 3 ZK servers ( we start in read only mode)
> Then create a piece of code (see Test.java attached):
> - a curator client (keep the timeout reasonably short)
> - a NodeCache listener on '/'
> - a separate ZooKeeper client
> -> the connection goes into READ_ONLY/ConnectedReadOnly as expected
> - start another ZooKeeper
> -> the connection goes into SUSPENDED/Disconnected, then CONNECTED/SyncConnected,
fine.
> - stop one of the 2 ZooKeeper alive
> -> the connection goes:
> ZOOKEEPER STATE: Disconnected
> CURATOR STATE: SUSPENDED
> ZOOKEEPER STATE: ConnectedReadOnly
> CURATOR STATE: READ_ONLY
> CURATOR STATE: SUSPENDED
> CURATOR STATE: READ_ONLY
> CURATOR STATE: SUSPENDED
> CURATOR STATE: READ_ONLY
> So it's flaky. Sometimes it doesn't switch back and forth, sometimes twice only, sometimes
a lot more.
> Depending on the timeout on the client, it might take more time to appear.
> I attached a sample code that would reproduce it in 20-30 seconds.
> Note that the problem may ultimately be on the ZooKeeper side but at that point I just
don't know.



--
This message was sent by Atlassian JIRA
(v6.2#6252)

Mime
View raw message