[TYPO3-english] Migration 4.6 to 6.2: error "Could not acquire lock for ClassLoader cache creation"

[Markus Klein]

Hi!

IMO the cache is really really crucial for some performance.
Moreover if you have locking issues here you will also have them in the frontend. (same locking method used)

So there must be some reason why the lock never released correctly.
Unfortunately this is the first report I hear about such problems.
I've no idea what how to tackle this currently, sorry.

Kind regards
Markus

------------------------------------------------------------
Markus Klein
TYPO3 CMS Active Contributors Team Member

> -----Original Message-----
> From: typo3-english-bounces at lists.typo3.org [mailto:typo3-english-
> bounces at lists.typo3.org] On Behalf Of François Suter
> Sent: Tuesday, April 15, 2014 10:29 AM
> To: typo3-english at lists.typo3.org
> Subject: Re: [TYPO3-english] Migration 4.6 to 6.2: error "Could not acquire
> lock for ClassLoader cache creation"
> 
> Hi Markus,
> 
> > Please check what is in the typo3temp/locks/ directory.
> 
> I got the error again after clearing the whole cache. At that point I found that
> a file was left in typo3temp/locks/. I deleted it and the error disappeared,
> but I really don't understand what's happening, since the lock file had correct
> ownership and permissions. At least from the file system point of view,
> there's no reason it could not be deleted to release the lock, so it's got to be
> a bug in the Core, but it's really erratic and thus hard to reproduce.
> 
> Anyway the class cache should catch the lock exception. It is rather silly to
> crash the whole installation just because some class information could not be
> cached. Or is this cache so crucial? What do you think?
> 
> Cheers
> 
> --
> 
> Francois Suter
> 
> Work: Cobweb Development Sarl - http://www.cobweb.ch
> 
> TYPO3: Help the project! - http://typo3.org/contribute/
> 
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