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Date: Wed, 14 Oct 2009 16:05:35 +0200
Message-ID: <ce88b6740910140705x53d54b1x1b971941ce0844f4@mail.gmail.com>
Subject: Re: Connection between ListenerStart and clustering
From: Bocalinda <bocalinda@gmail.com>
To: Tomcat Users List <users@tomcat.apache.org>
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Hi Rainer,

I'm sorry for the long delay in getting back to you.
I got sidetracked by another issue and wasn't able to look into this
earlier.

However, the bad news is that the administrators didn't allow me to apply
the patch as it is a production server.
I can apply it to pre-production, but the error isn't reproducable there...

2nd however; It's been 12 days since we've seen the listenerStart error due
to the classDefNotFound (in production).
I need to check with the developers whether they accidentily made any
changes that might have solved this problem.
It might as well be that we have been lucky and that the error starts
appearing again tomorrow.

I will try to reproduce the problem in another server, in order to try out
the patch you supplied.

Thanks again.


2009/10/3 Bocalinda <bocalinda@gmail.com>

> Wow, that's what is called a quick turn around! :)
> Thanks. I'll try as soon as possible and let you know.
>
> 2009/10/3 Rainer Jung <rainer.jung@kippdata.de>
>
> On 03.10.2009 18:11, Bocalinda wrote:
>> > Hi Rainer.
>> >
>> > <wild guess>
>> >> I remember problems with clustering which were of the following kind:
>> >> session replication data was received on a node although the context
>> >> wasn't yet fully initialized.
>> >>
>> >> Maybe we run into classloader troubles in that case?
>> >>
>> >> This could only happen if another node in the cluster is running all
>> the
>> >> time between stop and restart of the node, which logs the exception.
>> >>
>> >> This could certainly be the case as I have 4 nodos in cluster. I
>> > stop/restart one by one, in order to ensure the availability of the
>> webapp.
>> >
>> >
>> >> How easy can your reproduce the problem? In case I provide a patch,
>> >> could you test, whether the problem goes away?
>> >> </wild guess>
>> >>
>> >>
>> > Taking into account that this is a production server, it won't be easy
>> to
>> > play with it, but I can propose to take 2 nodes out of the cluster to do
>> > testing with.
>>
>> You can find a patched catalina-ha.jar and in case you are interested
>> also the respective source code file at
>>
>>
>> http://people.apache.org/~rjung/patches/tc6-cluster-context-startup-order.zip<http://people.apache.org/%7Erjung/patches/tc6-cluster-context-startup-order.zip>
>>
>> I did a one to one port from TC 5.5 to TC 6.0. So please test carefully
>> and let us know the results, so we can include the patch into the
>> standard code in case it proves it helps.
>>
>> Regards,
>>
>> Rainer
>>
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>

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