topic Activiti 5.11 - ClassNotFound and then found, crazy run in Alfresco Archive

Activiti 5.11 - ClassNotFound and then found, crazy run

fwachs — Wed, 12 Dec 2012 12:09:16 GMT

Hi all,I'm having a very rare problem with activiti 5.11 . I have a simple process that only executes code from a certain class, named UpdateSQLProcessTask every x amount of hours.This is what happened , all in the same run last night while noone had access to the server:1. First Activiti logs say i

Re: Activiti 5.11 - ClassNotFound and then found, crazy run

ronald_van_kuij — Thu, 13 Dec 2012 07:40:24 GMT

1: classes on a remote filesystem that is not accessible for a short period?

2: this can happen. Search the forum and docs about optimistic lock exceptions.

3: no idea…

Re: Activiti 5.11 - ClassNotFound and then found, crazy run

fwachs — Thu, 13 Dec 2012 11:25:14 GMT

1: classes on a remote filesystem that is not accessible for a short period?

2: this can happen. Search the forum and docs about optimistic lock exceptions.

3: no idea…

Thanks for your interest in this post.

1. Nope, everything is on the same HDD
2. I know it can, not my main concern here though.
3. Same here

Re: Activiti 5.11 - ClassNotFound and then found, crazy run

fwachs — Thu, 13 Dec 2012 18:48:57 GMT

The problem continues to happen no matter what I do…I've tried deploying the jar file multiple times, deleting the entire explorer webapp and deploying it again, etc.

No ideas anyone? Anything

Re: Activiti 5.11 - ClassNotFound and then found, crazy run

trademak — Thu, 13 Dec 2012 20:19:44 GMT

Hi,

Is this only happening sometimes or can it be easily reproduced? Then I can look into it.

Best regards,

Re: Activiti 5.11 - ClassNotFound and then found, crazy run

fwachs — Thu, 13 Dec 2012 21:18:57 GMT

Hi,

Is this only happening sometimes or can it be easily reproduced? Then I can look into it.

Best regards,

Nope, there's no easy easy way to reproduce this…It happens with some of my processes but not all of them and only when they are running on a timer, if I execute the job then it all works like it should.

Re: Activiti 5.11 - ClassNotFound and then found, crazy run

trademak — Fri, 14 Dec 2012 08:14:20 GMT

Okay fair enough. Some more questions to get this reproduced then.
Are you using a timer start event? And after this timer start event there's a service task that invokes a Java class?
Are you using a Spring bean with an expression or the class attribute of the service task element?
Did you deploy the JAR to the WEB-INF/lib of the application?
Are you using the Activiti Explorer or a self made application?

Best regards,

Re: Activiti 5.11 - ClassNotFound and then found, crazy run

fwachs — Fri, 14 Dec 2012 12:54:16 GMT

Okay fair enough. Some more questions to get this reproduced then.
Are you using a timer start event? And after this timer start event there's a service task that invokes a Java class?
Are you using a Spring bean with an expression or the class attribute of the service task element?
Did you deploy the JAR to the WEB-INF/lib of the application?
Are you using the Activiti Explorer or a self made application?

Best regards,

Yes I'm using a timer start event, and yes after that timer there's a service task that executes a Java Delegate.
I'm using the class attribute of the service task element.
The JAR file is on WEB-INF/lib of the explorer webapp (/opt/tomcat-activiti/webapps/activiti-explorer/WEB-INF/lib/).
I'm using the Activiti Explorer, I only changed 2 files: db.properties and activiti-standalone-context.xml, to add a simple spring bean.

[img]https://s3.amazonaws.com/zukbox-test/resources/problem.png[/img]

I've narrowed down the problem to a single process, it's always the same process that it's failling, I could share the xml file via PM if you want.
I've tried re uploading the xml but…same result

Re: Activiti 5.11 - ClassNotFound and then found, crazy run

trademak — Sat, 15 Dec 2012 08:27:27 GMT

Hi,

I also did some experiments with a similar process definition and class implementation, and I didn't run into any issues.
What did you define as a Spring bean? Because you said you are using a Java delegate with the class attribute?
Yes, please share your process definition.

Best regards,

Re: Activiti 5.11 - ClassNotFound and then found, crazy run

fwachs — Mon, 17 Dec 2012 23:45:02 GMT

I've sent the process definition over PM , let me know if you have any doubts or concerns. This continues to be a problem on prod on a daily basis.

Re: Activiti 5.11 - ClassNotFound and then found, crazy run

fwachs — Mon, 24 Dec 2012 11:16:13 GMT

Alright, the problem was quite simple. I had deployed both rest and explorer webapps without deploying my custom classes to the rest webapp. So whenever the rest app started processing one of the jobs there were on the database it failed because of ClassNotFoundException, of course. It was even harder to catch since both rest and explorer webapps write their logs to catalina.out only.

This thread can now be closed.

Re: Activiti 5.11 - ClassNotFound and then found, crazy run

jbarrez — Wed, 26 Dec 2012 08:55:48 GMT

Okay thanks for reporting back!
Faith in normal JVM operation has been restored 😉