Re: Odd NoClassDefFoundError Error
Re: Odd NoClassDefFoundError Error
- Subject: Re: Odd NoClassDefFoundError Error
- From: Chuck Hill <email@hidden>
- Date: Wed, 8 Sep 2010 12:07:36 -0700
On Sep 8, 2010, at 11:36 AM, David Avendasora wrote:
> Okay, Steve Meyer figured it out.
>
> The app started up just fine, but the first time the "Inbox" class was called, it called it's superclass which has a static variable that loads a set of EOs from the database.
That sounds a little... dangerous. ERXEnterpriseObjectCache anyone?
> That DB connection failed, which left the superclass uninitialized and therefor basically corrupt, and therefor the NoClassDefFoundError.
>
> I think we'll be digging around looking for more issues like this. Soon.
>
> Dave
>
> PS, Sorry about the lack of stack trace.
>
> On Sep 8, 2010, at 1:20 PM, Chuck Hill wrote:
>
>> Any exceptions in the log on start up? Were you upgrading something? Are you sure that this one instance did not just _not_ restart and so no see the new code?
>>
>> Chuck
>>
>>
>> On Sep 8, 2010, at 10:12 AM, David Avendasora wrote:
>>
>>> Hi all,
>>>
>>> Has anyone else ever seen this:
>>>
>>> We have a server that is running 4 instances of one of our apps. Last night we restarted one of the instances and apparently it didn't properly load 1 class that is part of one of our internal frameworks.
>>>
>>> Every time a user tried a feature that used that one class, we got java.lang.NoClassDefFoundError. The other instances of the same app started from the same files on the hard drive were running fine.
>>>
>>> We restarted the affected instance and that eliminated the problem.
>>>
>>> We couldn't find any errors in any of the logs that would explain why the class wouldn't have properly loaded.
>>>
>>> It's all fine now, but this was a very strange issue.
>>>
>>> Anyone ever run into something like that?
>>>
>>> Dave _______________________________________________
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>>
>> --
>> Chuck Hill Senior Consultant / VP Development
>>
>> Practical WebObjects - for developers who want to increase their overall knowledge of WebObjects or who are trying to solve specific problems.
>> http://www.global-village.net/products/practical_webobjects
>>
>>
>>
>>
>>
>>
>>
>
--
Chuck Hill Senior Consultant / VP Development
Practical WebObjects - for developers who want to increase their overall knowledge of WebObjects or who are trying to solve specific problems.
http://www.global-village.net/products/practical_webobjects
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