Craig Barratt wrote at about 20:58:38 -0800 on Sunday, January 3, 2010:
> Jeffrey writes:
>
> > In the past, people have mentioned that sometimes BackupPC_trashClean
> > seems to get hung and hog almost 100% of CPU.
> >
> > This is quite insidious since what apparently happens is that when
> > trashClean has trouble removing a file(s), it just continues to loop
> > through trying.
> >
> > However, no error message is posted to the log or the web
> > interface. In my case, it seems that this had been going on for days
> > without any warning.
> >
> > Also, Craig mentioned in the past that this could be due to permission
> > error and suggested running "sudo -u backuppc rm -rv trash/*" to
> > check. Well in my case, the 'rm' succeeded suggesting that the problem
> > may lie elsewhere.
> >
> > But again, I think there are two issues that need to be fixed:
> > 1. trash_Clean should not be allowed to go into a tight endless loop
> > (I think Craig had mentioned inserting a wait in the loop but not sure
> > if it ever was done)
> > 2. Also, errors in trash removal should be logged and added to the
> > regular email error messages that are sent out.
>
> I looked at the code and I can't see where BackupPC_trashClean can
> get into a tight loop, unless the file system is corrupted in a way
> that results in an infintely-deep directory tree (in which case it
> will eventually run out of memory).
>
> It does try to remove each file up to three times, but it will give up
> and go on. It will log an error message if it can't remove all the
> files, but then it goes to sleep for a few minutes before trying again.
>
> So I'm not sure how BackupPC_trashClean can get into a state where it
> is just eating 100% of the CPU.
>
> Craig
OK - well, I only noticed the problem once and I can't repeat... so I
will chalk it up to gremlins unless it happens again ;)
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