GSI Forum: Tracking » Riemann track finder crash.

Home » PANDA » PandaRoot » Tracking » Riemann track finder crash.

Show: Today's Messages :: Polls :: Message Navigator

Re: Riemann track finder crash. [message #11463 is a reply to message #11436]

Wed, 26 January 2011 18:44

Lia Lavezzi
Messages: 291
Registered: May 2007
Location: Torino

first-grade participant

From: *pv.infn.it

Hi,
concerning the crash on PndRiemannHit::operator<, I think it is due to the fact that fS in PndRiemannHit is not initialized.

I was having the same crash and by printing the s() and aHit.s() values inside the bool operator< (const PndRiemannHit& aHit)function, i.e. the arclengths which are compared, I got a lot of lines like these:
S 5.06921e-307 AHIT.S() 2.80686e-317
S 5.06921e-307 AHIT.S() 2.80686e-317
S 3.35472e-304 AHIT.S() 2.80686e-317
S 3.35472e-304 AHIT.S() 5.06921e-307
S 5.06921e-307 AHIT.S() 2.80686e-317
i.e. the values are not initialized.

They come from sortHits() which is inside PndRiemannTrack::refit, called for the first time in PndMvdRiemannTrackFinder::GetStartTracks().
At this stage the fS variable of the PndRiemannHit is not filled yet and this may lead to the crash.
If the sorting is not necessary in this first call, then the fS initialization should fix the problem.
What do the experts think of this?
Cheers,
Lia.

Report message to a moderator

[Message index]

		Riemann track finder crash. By: Lia Lavezzi on Thu, 13 January 2011 19:59
		Re: Riemann track finder crash. By: Tobias Stockmanns on Tue, 18 January 2011 15:39
		Re: Riemann track finder crash. By: Lia Lavezzi on Tue, 18 January 2011 15:56
		Re: Riemann track finder crash. By: Susanna Costanza on Tue, 18 January 2011 17:02
		Re: Riemann track finder crash. By: Susanna Costanza on Wed, 19 January 2011 10:44
		Re: Riemann track finder crash. By: Lia Lavezzi on Wed, 26 January 2011 18:44
		Re: Riemann track finder crash. By: Lia Lavezzi on Mon, 04 April 2011 12:27
		Re: Riemann track finder crash. By: Tobias Stockmanns on Thu, 07 April 2011 15:53
		Re: Riemann track finder crash. By: Lia Lavezzi on Mon, 11 April 2011 18:47

Previous Topic:	energy dose to readout electronics
Next Topic:	Timeout for the STT and STT+MVD pattern recognition

Goto Forum:

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Tue Sep 17 21:52:18 CEST 2024

Total time taken to generate the page: 0.00860 seconds