Also, add an issue at https://issues.apache.org/jira/browse/TAPESTRY in order to track this and add more info, e.t.c.
On Thu, Jan 8, 2009 at 9:03 PM, Andreas Andreou <andy...@di.uoa.gr> wrote: > I want to take a look, but got two questions... > - you said you tried several VMs, does that include 1.6 ones? > - Does https://issues.apache.org/jira/browse/TAPESTRY-2708 seem related? > > On Thu, Jan 8, 2009 at 8:18 PM, Mike Wasserman > <mike.wasser...@intelliware.ca> wrote: >> We've tracked the problem further and it appears to be a thread safety >> problem in the PageLoader class. >> We have pop-ups in our app that are seperate Tapestry pages and we think >> that they may be clobbering each other when getting loaded. >> >> Is this possible? >> >> ________________________________ >> >> From: Mike Wasserman [mailto:mike.wasser...@intelliware.ca] >> Sent: Thu 1/8/2009 10:15 AM >> To: Tapestry users >> Subject: RE: Tapestry Upgrade problem >> >> >> >> It now makes sense to me why the _components map is empty when >> getComponent() is called. >> The map is never populated because no componentIds are found when >> PageLoder.construct() tries to get them off the IComponentSpecification, >> (PageLoader line: 358). >> The loop that in which the component creation happens is controlled by the >> number of componentIds found. >> >> Now to figure out why there are no ids. >> >> Mike >> >> ________________________________ >> >> From: Mike Wasserman [mailto:mike.wasser...@intelliware.ca] >> Sent: Wed 1/7/2009 3:32 PM >> To: Tapestry users >> Subject: RE: Tapestry Upgrade problem >> >> >> >> Actually I was wrong in what I wrote in my last email. >> addComponent() is NOT being called before getComponent() when the problem >> arises. >> >> Mike >> >> ________________________________ >> >> From: Mike Wasserman [mailto:mike.wasser...@intelliware.ca] >> Sent: Wed 1/7/2009 2:47 PM >> To: Tapestry users >> Subject: RE: Tapestry Upgrade problem >> >> >> >> Multiple pages are afflicted. It appears to happen primarily with the >> "shell" component. >> >> We put logging in the getComponent() and the addComponent() methods of the >> AbstractComponent class to output the Thread Id and Component Id since the >> adding of components and the getting of components seemed to be happening on >> the same thread. We got output that indicated that addComponent() was being >> called before getComponent(), but despite this we experienced the problem. >> When we stopped the app with a break point (we're using Eclipse) and >> examined the variables in the AbstractComponent class we found that the >> _components Map was null, and _active was false. >> >> Thanks >> >> Mike >> >> ________________________________ >> >> From: Howard Lewis Ship [mailto:hls...@gmail.com] >> Sent: Wed 1/7/2009 2:33 PM >> To: Tapestry users >> Subject: Re: Tapestry Upgrade problem >> >> >> >> The _components field should be populated before your code gets invoked. >> >> Without looking at the code, it sounds like a Tapestry bug; but I >> can't imagine how a bug like that could have slipped through for so >> long that you're the only one who sees it. >> >> Does this happen to only a single page, or are multiple pages afflicted? >> >> On Wed, Jan 7, 2009 at 10:40 AM, Mike Wasserman >> <mike.wasser...@intelliware.ca> wrote: >>> I added the following code to the AbstractComponent.getComponent(String id) >>> method: >>> >>> while(_components == null) { >>> try { >>> System.out.println("SLEEPING"); >>> Thread.currentThread().sleep(500); >>> } catch (InterruptedException e) { >>> e.printStackTrace(); >>> } >>> } >>> >>> I was hoping that by having the app sleep for a short period of time the >>> _components HashMap would eventually be populated. >>> It seems to work for a while, but eventually the app ends up in a state of >>> permanently sleeping (this seems to happen randomly, sometimes after 2 >>> tests, sometimes after 20 tests, sometimes after 50 tests). >>> So it appears that the _components HashMap is never populated under some >>> circumstances. >>> >>> Anyone have any clue why this is happening, or how it is possible for this >>> to happen in Tapestry? >>> >>> Thanks >>> >>> Mike >>> >>> >>> ________________________________ >>> >>> From: Mike Wasserman [mailto:mike.wasser...@intelliware.ca] >>> Sent: Tue 1/6/2009 2:58 PM >>> To: Tapestry users >>> Subject: RE: Tapestry Upgrade problem >>> >>> >>> >>> I've tried a variety of JDKs and the problem happens with all of them. >>> >>> I've tracked it through the code and what it seems to come down to is that >>> sometimes the _components Map in the AbstractComponent class is populated >>> and other times it's null. >>> My guess at this point is that it's some sort of threading problem within >>> Tapestry. >>> >>> Anyone have any ideas on how to fix this problem? >>> >>> Thanks >>> >>> Mike >>> >>> ________________________________ >>> >>> From: Mike Wasserman [mailto:mike.wasser...@intelliware.ca] >>> Sent: Thu 12/25/2008 1:07 PM >>> To: Tapestry users >>> Subject: RE: Tapestry Upgrade problem >>> >>> >>> >>> Thanks for your response. >>> No, we didn't have this problem with 4.1.2 >>> >>> I am off on holidays for a little while, but I will try your suggestion as >>> soon as I get back. >>> >>> Thanks again >>> >>> ________________________________ >>> >>> From: andre...@gmail.com on behalf of Andreas Andreou >>> Sent: Wed 12/24/2008 3:11 PM >>> To: Tapestry users >>> Subject: Re: Tapestry Upgrade problem >>> >>> >>> >>> So, you weren't seeing this problem with 4.1.2 ? >>> >>> I'd be interesting if you could try with a 1.6 VM, but apart from that >>> and since you're getting this consistently, i'm wondering if you can try >>> this >>> (which is based on some old reports I remember reading here): >>> - Start your app and before running the tests, try to visit all the affected >>> pages by hand (making sure they load fine) and only then fire the tests. >>> Do you see problems after that? >>> >>> On Wed, Dec 24, 2008 at 8:16 PM, Mike Wasserman >>> <mike.wasser...@intelliware.ca> wrote: >>>> I've tried with JDK 1.5.0_10 and JDK 1.5.0_17 and I am experiencing the >>>> same problem with both. >>>> The Selenium tests are hitting the app pretty hard and I'm wondering if >>>> it's causing a threading problem within Tapestry. >>>> Isn't the component creation multi-threaded? >>>> >>>> >>>> -----Original Message----- >>>> From: Howard Lewis Ship [mailto:hls...@gmail.com] >>>> Sent: Tuesday, December 23, 2008 2:00 PM >>>> To: Tapestry users >>>> Subject: Re: Tapestry Upgrade problem >>>> >>>> What JDK are you running on? >>>> >>>> On Tue, Dec 23, 2008 at 10:50 AM, Mike Wasserman >>>> <mike.wasser...@intelliware.ca> wrote: >>>>> I am upgrading from Tapestry 4.1.2 to Tapestry 4.1.6. >>>>> When I run my integration tests (using Selenium) I am get a error >>>> randomly. >>>>> I receive a org.apache.hivemind.ApplicationRuntimeException that >>>> indicates that given component (page) does not contain a component >>>> shell. >>>>> All of the affected pages have <html jwcid="shell"> which leads me to >>>> believe that I have specified a shell component. >>>>> I have tracked the problem into the PageLoader class, but since the >>>> problem is random it is very difficult to debug. >>>>> Is it possible that this is a threading problem? >>>>> >>>>> Can anyone help? >>>>> >>>>> Mike >>>>> >>>> >>>> >>>> >>>> -- >>>> Howard M. Lewis Ship >>>> >>>> Creator Apache Tapestry and Apache HiveMind >>>> >>>> --------------------------------------------------------------------- >>>> To unsubscribe, e-mail: users-unsubscr...@tapestry.apache.org >>>> For additional commands, e-mail: users-h...@tapestry.apache.org >>>> >>>> >>>> --------------------------------------------------------------------- >>>> To unsubscribe, e-mail: users-unsubscr...@tapestry.apache.org >>>> For additional commands, e-mail: users-h...@tapestry.apache.org >>>> >>>> >>> >>> >>> >>> -- >>> Andreas Andreou - andy...@apache.org - http://blog.andyhot.gr >>> <http://blog.andyhot.gr/> <http://blog.andyhot.gr/> >>> <http://blog.andyhot.gr/> <http://blog.andyhot.gr/> >>> <http://blog.andyhot.gr/> <http://blog.andyhot.gr/> >>> <http://blog.andyhot.gr/> >>> Tapestry / Tacos developer >>> Open Source / JEE Consulting >>> >>> --------------------------------------------------------------------- >>> To unsubscribe, e-mail: users-unsubscr...@tapestry.apache.org >>> For additional commands, e-mail: users-h...@tapestry.apache.org >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> --------------------------------------------------------------------- >>> To unsubscribe, e-mail: users-unsubscr...@tapestry.apache.org >>> For additional commands, e-mail: users-h...@tapestry.apache.org >>> >> >> >> >> -- >> Howard M. Lewis Ship >> >> Creator Apache Tapestry and Apache HiveMind >> >> --------------------------------------------------------------------- >> To unsubscribe, e-mail: users-unsubscr...@tapestry.apache.org >> For additional commands, e-mail: users-h...@tapestry.apache.org >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> --------------------------------------------------------------------- >> To unsubscribe, e-mail: users-unsubscr...@tapestry.apache.org >> For additional commands, e-mail: users-h...@tapestry.apache.org >> > > > > -- > Andreas Andreou - andy...@apache.org - http://blog.andyhot.gr > Tapestry / Tacos developer > Open Source / JEE Consulting > -- Andreas Andreou - andy...@apache.org - http://blog.andyhot.gr Tapestry / Tacos developer Open Source / JEE Consulting --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tapestry.apache.org For additional commands, e-mail: users-h...@tapestry.apache.org
