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http://issues.apache.org/jira/browse/BEEHIVE-1028?page=comments#action_12360547
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Rich Feit commented on BEEHIVE-1028:
------------------------------------
Chad, I'm attaching a Controls-only webapp that proves one of three things:
1) This is fundamentally a problem with Controls.
2) At least one piece of the problem is within Controls.
3) The NetUI framework is using Controls incorrectly, since it uses
Controls in the way that this repro app uses Controls.
Hopefully you or someone else can tell me whether it's 1/2, or 3. :)
Basically, the issue involves using the *same instance* of a Control from two
separate threads. To reproduce the problem:
- Deploy the attached app to Tomcat.
- Hit http://localhost:8080/jira1028Simplified/one.jsp.
- Make sure your Tomcat console is visible.
- Click the "go" link in the browser (to eliminate variables, please use
Firefox, not IE or Mozilla).
- When you see "Click again!" on the console, click the "go" link again.
You'll see the following output (the numbers are thread-IDs). Notice that
there's only one call to each of onAcquire/onRelease (on the first thread),
even though dummyControlMethod gets called from both threads.
34 onAcquire
34 begin dummyControlMethod
34 end dummyControlMethod
35 begin dummyControlMethod
34 onRelease
35 end dummyControlMethod
> Controls in pageflows do not appear to be receiving lifecycle events in the
> proper order
> ----------------------------------------------------------------------------------------
>
> Key: BEEHIVE-1028
> URL: http://issues.apache.org/jira/browse/BEEHIVE-1028
> Project: Beehive
> Type: Bug
> Components: NetUI
> Versions: V1, 1.1
> Reporter: Chad Schoettger
> Assignee: Chad Schoettger
> Attachments: beehive1028.zip
>
> So I have a small webapp which basically consists of a pageflow and a jdbc
> control. The single jsp in the web app invokes an action in the page flow as:
> <tr><td><img
> src="doRenderChart.do?versionName=9.2Beta&projectName=Workshop&componentName=W-IDE&JFWidth=500&JFHeight=300"
> border="0"/></td></tr>
> It does this 10 or 11 times to build a table which contains images generated
> by the action using the jdbc control to retrieve data from a database.
> Typically (although not always) at least one of the images will not be
> generated due to an SQL Error throw by the jdbc control. The error is that
> the SQLConnection has been closed.
> Here is a portion of the tomcat log, I've added some debugging statements in
> the ControlContainerContext class to help me see what was going on, the
> doRenderChart() is the page flow action being called by the jsp. It appears
> the control's begin and end events are not fired in the right order, causing
> (in some instances) the control to be unititialzed before a call has been
> completed.
> log4j:WARN Please initialize the log4j system properly.
> BEGIN_CONTEXT: THREAD ID = 34
> END_CONTEXT: THREAD ID = 34
> BEGIN_CONTEXT: THREAD ID = 34
> **** Enter: doRenderChart() ****
> calling version=9.2Beta project=Workshop component=null
> BEGIN_CONTEXT: THREAD ID = 35
> **** Leave: doRenderChart() ****
> **** Enter: doRenderChart() ****
> calling version=9.2Beta project=Workshop component=W-IDE
> BEGIN_CONTEXT: THREAD ID = 34
> **** Leave: doRenderChart() ****
> END_CONTEXT: THREAD ID = 34
> BEGIN_CONTEXT: THREAD ID = 35
> END_CONTEXT: THREAD ID = 34
> BEGIN_CONTEXT: THREAD ID = 34
> **** Enter: doRenderChart() ****
> calling version=9.2Beta project=Workshop component=W-Docs
> **** Leave: doRenderChart() ****
> END_CONTEXT: THREAD ID = 35
> END_CONTEXT: THREAD ID = 35
> BEGIN_CONTEXT: THREAD ID = 35
> BEGIN_CONTEXT: THREAD ID = 34
> END_CONTEXT: THREAD ID = 34
> END_CONTEXT: THREAD ID = 34
> **** Enter: doRenderChart() ****
> calling version=9.2Beta project=Workshop component=W-IDECore
> BEGIN_CONTEXT: THREAD ID = 34
> **** Leave: doRenderChart() ****
> **** Enter: doRenderChart() ****
> calling version=9.2Beta project=Workshop component=W-External
> BEGIN_CONTEXT: THREAD ID = 35
> **** Leave: doRenderChart() ****
> END_CONTEXT: THREAD ID = 35
> BEGIN_CONTEXT: THREAD ID = 34
> END_CONTEXT: THREAD ID = 34
> END_CONTEXT: THREAD ID = 34
> END_CONTEXT: THREAD ID = 35
> BEGIN_CONTEXT: THREAD ID = 35
> **** Enter: doRenderChart() ****
> calling version=9.2Beta project=Workshop component=W-Project
> BEGIN_CONTEXT: THREAD ID = 34
> **** Leave: doRenderChart() ****
> **** Enter: doRenderChart() ****
> calling version=9.2Beta project=Workshop component=W-Javelin
> BEGIN_CONTEXT: THREAD ID = 35
> **** Leave: doRenderChart() ****
> END_CONTEXT: THREAD ID = 35
> END_CONTEXT: THREAD ID = 35
> BEGIN_CONTEXT: THREAD ID = 35
> BEGIN_CONTEXT: THREAD ID = 34
> END_CONTEXT: THREAD ID = 34
> END_CONTEXT: THREAD ID = 34
> **** Enter: doRenderChart() ****
> calling version=9.2Beta project=Workshop component=W-RuntimeControls
> BEGIN_CONTEXT: THREAD ID = 34
> **** Leave: doRenderChart() ****
> **** Enter: doRenderChart() ****
> calling version=9.2Beta project=Workshop component=W-RuntimeNetUI
> BEGIN_CONTEXT: THREAD ID = 35
> **** Leave: doRenderChart() ****
> END_CONTEXT: THREAD ID = 35
> END_CONTEXT: THREAD ID = 35
> BEGIN_CONTEXT: THREAD ID = 35
> **** Enter: doRenderChart() ****
> calling version=9.2Beta project=Workshop component=W-Upgrade
> BEGIN_CONTEXT: THREAD ID = 34
> **** Leave: doRenderChart() ****
> END_CONTEXT: THREAD ID = 34
> BEGIN_CONTEXT: THREAD ID = 35
> END_CONTEXT: THREAD ID = 34
> END_CONTEXT: THREAD ID = 35
> END_CONTEXT: THREAD ID = 35
> BEGIN_CONTEXT: THREAD ID = 33
> END_CONTEXT: THREAD ID = 33
> BEGIN_CONTEXT: THREAD ID = 33
> **** Enter: doRenderChart() ****
> calling version=9.2Beta project=Workshop component=null
> **** Leave: doRenderChart() ****
> BEGIN_CONTEXT: THREAD ID = 33
> END_CONTEXT: THREAD ID = 33
> END_CONTEXT: THREAD ID = 33
> BEGIN_CONTEXT: THREAD ID = 33
> **** Enter: doRenderChart() ****
> calling version=9.2Beta project=Workshop component=W-Docs
> BEGIN_CONTEXT: THREAD ID = 34
> **** Leave: doRenderChart() ****
> **** Enter: doRenderChart() ****
> calling version=9.2Beta project=Workshop component=W-IDE
> BEGIN_CONTEXT: THREAD ID = 33
> **** Leave: doRenderChart() ****
> END_CONTEXT: THREAD ID = 33
> END_CONTEXT: THREAD ID = 33
> BEGIN_CONTEXT: THREAD ID = 34
> BEGIN_CONTEXT: THREAD ID = 33
> **** Enter: doRenderChart() ****
> calling version=9.2Beta project=Workshop component=W-External
> **** Leave: doRenderChart() ****
> BEGIN_CONTEXT: THREAD ID = 33
> END_CONTEXT: THREAD ID = 34
> END_CONTEXT: THREAD ID = 34
> BEGIN_CONTEXT: THREAD ID = 34
> END_CONTEXT: THREAD ID = 33
> END_CONTEXT: THREAD ID = 33
> BEGIN_CONTEXT: THREAD ID = 33
> **** Enter: doRenderChart() ****
> calling version=9.2Beta project=Workshop component=W-IDECore
> **** Leave: doRenderChart() ****
> **** Enter: doRenderChart() ****
> calling version=9.2Beta project=Workshop component=W-Project
> BEGIN_CONTEXT: THREAD ID = 34
> **** Leave: doRenderChart() ****
> END_CONTEXT: THREAD ID = 34
> END_CONTEXT: THREAD ID = 34
> BEGIN_CONTEXT: THREAD ID = 34
> **** Enter: doRenderChart() ****
> BEGIN_CONTEXT: THREAD ID = 33
> calling version=9.2Beta project=Workshop component=W-Javelin
> **** Leave: doRenderChart() ****
> END_CONTEXT: THREAD ID = 33
> END_CONTEXT: THREAD ID = 33
> BEGIN_CONTEXT: THREAD ID = 33
> BEGIN_CONTEXT: THREAD ID = 34
> **** Enter: doRenderChart() ****
> calling version=9.2Beta project=Workshop component=W-RuntimeControls
> **** Leave: doRenderChart() ****
> END_CONTEXT: THREAD ID = 34
> END_CONTEXT: THREAD ID = 34
> BEGIN_CONTEXT: THREAD ID = 34
> BEGIN_CONTEXT: THREAD ID = 33
> END_CONTEXT: THREAD ID = 33
> END_CONTEXT: THREAD ID = 33
> BEGIN_CONTEXT: THREAD ID = 33
> **** Enter: doRenderChart() ****
> calling version=9.2Beta project=Workshop component=W-RuntimeNetUI
> **** Leave: doRenderChart() ****
> **** Enter: doRenderChart() ****
> calling version=9.2Beta project=Workshop component=W-Upgrade
> BEGIN_CONTEXT: THREAD ID = 34
> **** Leave: doRenderChart() ****
> END_CONTEXT: THREAD ID = 34
> END_CONTEXT: THREAD ID = 34
> BEGIN_CONTEXT: THREAD ID = 33
> END_CONTEXT: THREAD ID = 33
> END_CONTEXT: THREAD ID = 33
> BEGIN_CONTEXT: THREAD ID = 34
> END_CONTEXT: THREAD ID = 34
> Listening for transport dt_shmem at address: jdbconn
> BEGIN_CONTEXT: THREAD ID = 34
> **** Enter: doRenderChart() ****
> calling version=9.2Beta project=Workshop component=null
> **** Leave: doRenderChart() ****
> BEGIN_CONTEXT: THREAD ID = 34
> END_CONTEXT: THREAD ID = 34
> END_CONTEXT: THREAD ID = 34
> BEGIN_CONTEXT: THREAD ID = 34
> **** Enter: doRenderChart() ****
> calling version=9.2Beta project=Workshop component=W-Docs
> **** Leave: doRenderChart() ****
> BEGIN_CONTEXT: THREAD ID = 34
> END_CONTEXT: THREAD ID = 34
> END_CONTEXT: THREAD ID = 34
> BEGIN_CONTEXT: THREAD ID = 35
> BEGIN_CONTEXT: THREAD ID = 34
> **** Enter: doRenderChart() ****
> calling version=9.2Beta project=Workshop component=W-External
> **** Leave: doRenderChart() ****
> **** Enter: doRenderChart() ****
> calling version=9.2Beta project=Workshop component=W-IDE
> BEGIN_CONTEXT: THREAD ID = 34
> **** Leave: doRenderChart() ****
> END_CONTEXT: THREAD ID = 34
> END_CONTEXT: THREAD ID = 34
> BEGIN_CONTEXT: THREAD ID = 35
> BEGIN_CONTEXT: THREAD ID = 34
> **** Enter: doRenderChart() ****
> calling version=9.2Beta project=Workshop component=W-IDECore
> **** Leave: doRenderChart() ****
> BEGIN_CONTEXT: THREAD ID = 34
> END_CONTEXT: THREAD ID = 35
> END_CONTEXT: THREAD ID = 35
> BEGIN_CONTEXT: THREAD ID = 35
> END_CONTEXT: THREAD ID = 34
> END_CONTEXT: THREAD ID = 34
> **** Enter: doRenderChart() ****
> BEGIN_CONTEXT: THREAD ID = 34
> calling version=9.2Beta project=Workshop component=W-Project
> **** Leave: doRenderChart() ****
> **** Enter: doRenderChart() ****
> calling version=9.2Beta project=Workshop component=W-Javelin
> BEGIN_CONTEXT: THREAD ID = 35
> **** Leave: doRenderChart() ****
> BEGIN_CONTEXT: THREAD ID = 34
> END_CONTEXT: THREAD ID = 35
> END_CONTEXT: THREAD ID = 34
> END_CONTEXT: THREAD ID = 34
> END_CONTEXT: THREAD ID = 35
> BEGIN_CONTEXT: THREAD ID = 35
> **** Enter: doRenderChart() ****
> calling version=9.2Beta project=Workshop component=W-RuntimeControls
> BEGIN_CONTEXT: THREAD ID = 34
> **** Leave: doRenderChart() ****
> **** Enter: doRenderChart() ****
> calling version=9.2Beta project=Workshop component=W-RuntimeNetUI
> BEGIN_CONTEXT: THREAD ID = 35
> **** Leave: doRenderChart() ****
> END_CONTEXT: THREAD ID = 35
> BEGIN_CONTEXT: THREAD ID = 34
> END_CONTEXT: THREAD ID = 35
> BEGIN_CONTEXT: THREAD ID = 35
> **** Enter: doRenderChart() ****
> calling version=9.2Beta project=Workshop component=W-Upgrade
> **** Leave: doRenderChart() ****
> BEGIN_CONTEXT: THREAD ID = 35
> END_CONTEXT: THREAD ID = 35
> END_CONTEXT: THREAD ID = 35
> END_CONTEXT: THREAD ID = 34
> END_CONTEXT: THREAD ID = 34
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