On second thoughts,
> Error creating thread: Resource temporarily unavailable
sounds like it would be related to RLIMIT_NPROC. Although it does not explain why -l works. Perhaps the thumbnailer contains a thread leak that is triggered by the 30 second limit, which -l avoids.
On second thoughts,
> Error creating thread: Resource temporarily unavailable
sounds like it would be related to RLIMIT_NPROC. Although it does not explain why -l works. Perhaps the thumbnailer contains a thread leak that is triggered by the 30 second limit, which -l avoids.