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From Enrico Olivelli - Diennea <enrico.olive...@diennea.com>
Subject Re: NPE on ClientCnxnSocketNetty on 3.5.3-BETA
Date Fri, 08 Sep 2017 07:12:13 GMT
Il giorno gio, 07/09/2017 alle 15.36 -0700, Abraham Fine ha scritto:

My fault, I should have read the subject. :)

I have an idea of what is causing this issue. Just out of curiosity,
besides the ugly stack trace, is this issue associated with any
unexpected behavior from zookeeper?


Thank you Abraham for your quick response,

Honestly I do not know, it came out on unit tests only once and I do not have logs on the
server side, sorry.
The test is about dealing with an expired session, something like:
- start a session
- create a new ZooKeeper with the same sessionid and password and close it -> the session
expires
- close the session -> boom!

I saw it only once, and I have upgraded my env to zookeeper 3.5.3-BETA 2 months ago
It is a unit test so ZK server is running in the same JVM

Anyway IMHO this is a bad error and the client should not ever crash in spite of weird server
side behavior
Do you think it is related to another reported issue ?

I can help on fixing it

Cheers
Enrico




Thanks,
Abe

On Thu, Sep 7, 2017, at 12:47, Enrico Olivelli wrote:


3.5.3 Beta , my bad I have only written it in the subject
Thanks
Enrico

On gio 7 set 2017, 21:18 Abraham Fine <afine@apache.org<mailto:afine@apache.org>>
wrote:



Would you mind sharing which version of ZooKeeper you are using?

Thanks,
Abe

On Thu, Sep 7, 2017, at 06:59, Enrico Olivelli wrote:


Hi all,
I have hit this error during internal tests of my product. The problem is
not always reproducible

java.lang.NullPointerException
    at



org.apache.zookeeper.ClientCnxnSocketNetty.onClosing(ClientCnxnSocketNetty.java:206)


    at
org.apache.zookeeper.ClientCnxn$SendThread.close(ClientCnxn.java:1395)
    at org.apache.zookeeper.ClientCnxn.disconnect(ClientCnxn.java:1440)
    at org.apache.zookeeper.ClientCnxn.close(ClientCnxn.java:1467)
    at org.apache.zookeeper.ZooKeeper.close(ZooKeeper.java:1319)

I did not find any issue in JIRA related to this stacktrace

Does anyone ever hit this problem ?
Otherwise I will create a JIRA and start looking at the cause

Thanks
Enrico Olivelli





--


-- Enrico Olivelli


--

Enrico Olivelli Software Development Manager @Diennea Tel.: (+39) 0546 066100 - Int. 925 Viale
G.Marconi 30/14 - 48018 Faenza (RA) MagNews - E-mail Marketing Solutions http://www.magnews.it
Diennea - Digital Marketing Solutions http://www.diennea.com

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