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From Rakesh R <rake...@huawei.com>
Subject RE: A little bug in org.apache.zookeeper.ZooKeeper (3.4.6)
Date Fri, 21 Nov 2014 08:37:00 GMT
Thanks Robin for reporting this. I could see a jira talking the same. Please have a look at

-----Original Message-----
From: Robin [mailto:rchzzjcn@163.com] 
Sent: 21 November 2014 14:00
To: user@zookeeper.apache.org
Subject: Re:RE: A little bug in org.apache.zookeeper.ZooKeeper (3.4.6)

OK, let me try it.

在 2014-11-21 16:17:04,"Flavio Junqueira" <fpjunqueira@yahoo.com.INVALID> 写道:
>Hi Robin,
>Could you create a jira and report it there, please? If you could provide a patch, even
>-----Original Message-----
>From: "Robin" <rchzzjcn@163.com>
>Sent: ‎21/‎11/‎2014 07:23
>To: "user@zookeeper.apache.org" <user@zookeeper.apache.org>
>Subject: A little bug in org.apache.zookeeper.ZooKeeper (3.4.6)
>In org.apache.zookeeper.ZooKeeper.ZKWatchManager#materialize(), even if the defaultWatcher
is null, it is still be added into the Set and returned. This would cause a lot of annoying
error log at org.apache.zookeeper.ClientCnxn.EventThread#processEvent as below:
>       2014-11-21 15:21:23,279 - ERROR - [main-EventThread:ClientCnxn$EventThread@524]
- Error while calling watcher
>       java.lang.NullPointerException
>           at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:522)
>           at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:498)
>It can be simply fixed by having a null check in ZKWatchManager.
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