[jBPM] - Update Process Definitions timeout - with solution.
by John Lewis
John Lewis [https://community.jboss.org/people/john0945] created the discussion
"Update Process Definitions timeout - with solution."
To view the discussion, visit: https://community.jboss.org/message/795847#795847
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Summary: I resolved class java.io.IOException / timeout error when updating processes in the jBPM console by fixing errors in my process.
Hi. Just wanted to post something I've been struggling with. I installed jBPM5 with the installer, and started developing my own process. Everything was going smoothly, until after I added a XOR gateway. I started getting an errror when trying to update the processes in the jBPM console. I got a popup error message, and no process definitions, though there should have been three. Here's the error:
2013-02-04 08:55:19,851 [DEBUG] GET: http://localhost:8080/gwt-console-server/rs/process/definitions http://localhost:8080/gwt-console-server/rs/process/definitions
2013-02-04 08:56:18,982 [ERROR] <ul><li>URL: ' http://localhost:8080/gwt-console-server/rs/process/definitions http://localhost:8080/gwt-console-server/rs/process/definitions'
<li>Action: 'org.jboss.bpm.console.client.process.UpdateDefinitionsAction'
<li>Exception: 'class java.io.IOException'</ul>
Request timeout
java.io.IOException:
Request timeout
at Unknown.$fillInStackTrace_1(JsArrayString.java:42)
at Unknown.$IOException(StackTraceCreator.java:366)
at Unknown.run_17(AbstractRESTAction.java:120)
at Unknown.fire(Timer.java:141)
at Unknown.anonymous(Timer.java:60)
at Unknown.entry0(Impl.java:146)
at Unknown.anonymous(Impl.java:56)
I tried restarting the server, downloading new WAR files, redeploying the WAR files... everything I could think of. Sometimes it would work for a bit.
Eventually, I decided to first fix the compilation error I was getting when trying to build the package. In the conditions of the gateways (which are set on the branches leaving the gateway), I was trying to use a boolean process variable, but I was getting errors because the getVariable() method returns an object, which I was trying to cast to a boolean. After discovering this, I changed the code, and the build was successful. Here's the old and new code.
OLD: boolean decision = (boolean)kcontext.getVariable("instock");
return decision;
NEW: boolean decision = kcontext.getVariable("instock").equals(true);
return decision;
For information on the getVariable() method, I used:
http://docs.jboss.org/jbpm/v5.4/javadocs/org/jbpm/process/instance/contex... http://docs.jboss.org/jbpm/v5.4/javadocs/org/jbpm/process/instance/contex...
For information on the equals() method, I used:
http://docs.jboss.org/jbpm/v5.4/javadocs/org/jbpm/task/BooleanExpression.... http://docs.jboss.org/jbpm/v5.4/javadocs/org/jbpm/task/BooleanExpression....
After changing to the new code, I updated the processes and didn't get the timeout issue.
To check I had actually solved it by changing the code, I reverted back to the old code. The process was now not valid, so the Console didn't update to the new version. I rebooted the server to force it to work with the invalid version. Now, the Console didn't pick up the invalid process at all (but successfully loads the other valid processes I have, without giving the timeout error).
To attempt to recreate the timeout error, I reverted to an even older version of code (the version that was in use when the server booted up, and gave the timeout error). Here I tried to save an Object into a Boolean variable without casting.
OLDER: boolean decision = (boolean)kcontext.getVariable("instock");
return decision;
After changing back to this code, I restarted the server. It took a couple tries before the console and Guvnor showed in the browser, but when it did, the process still didn't show up. The timeout error didn't come back.
Then, I changed back to the new code, built the package and refreshed the processes in the Console. The process then showed up (without having to reboot).
In conclusion, if you encounter a timeout error while updating the process definitions in the jBPM console, or the process doesn't show up, check that you can successfully build the package that the process is in. (This is done under the edit tab of the package, in Drools Guvnor. See section 3.6 of the jBPM installer guide for a video of how to do it. http://docs.jboss.org/jbpm/v5.4/userguide/ch.installer.html#d0e571 http://docs.jboss.org/jbpm/v5.4/userguide/ch.installer.html#d0e571).
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13 years, 2 months
[jBPM] - Start a task after another without showing task list in jbpm console
by Alive Substance
Alive Substance [https://community.jboss.org/people/alivesubstance] created the discussion
"Start a task after another without showing task list in jbpm console"
To view the discussion, visit: https://community.jboss.org/message/795801#795801
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My customer want to extend jbpm console and add new functionallity. As we now after a process starts the logged in user will assign a tasks from this process. Then he can view they in a Task -> Personal Tasks window. He starts the task and complete it and will see tasks list again. In order to start new task he should choose assigned task and press view.
Is there a way to exclude the step with showing tasks list and immediatelly start another task from a process? So, the flow will looks like:
Now: *[human task 1] -> tasklist -> [human task 2]*
Desired: *[human task 1] -> [human task 2]*
Any help will be very appreciated.
I stack a little at this task. I found that the +FormDispatcherComposite+ is responsible to render task and the +SyncTaskServiceWrapper+ is responsible for collabaration with task server. Unfortunatelly, I didn't work with GWT and can't find a point what exactly going on after I will close a task window. I think it will be a place from which I can continue my investagation.
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13 years, 2 months
[jBPM] - jBPM console: tasks not shown
by Mija Anoreg
Mija Anoreg [https://community.jboss.org/people/jbpm5developer] created the discussion
"jBPM console: tasks not shown"
To view the discussion, visit: https://community.jboss.org/message/795796#795796
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Hi all, I desperately need help on this. I created my own process definition bpmn2 file using drools guvnor/oryx designer and deployed it in jbpm console. The process is shown in process overview and process is succesfully started. However no task is listed on personal task list and no error shown either. my process definition consists of 1 user task which should be performed by krisv. processinstanceinfo table in database was also updated after starting the process but not the task table. Im using jbpm 5.2 on postgresql. Please please help me on this. Been trying to fix it already for weeks! :(
How do you assign a task to a user? I did it by specifying th actor in the oryx designer. I use jbpm console REST api to start a new process instance which is localhost:8080/gwt-console-server/rs/process/definition/{my.process.id.here}/new_instance
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13 years, 2 months