Interesting. Do you know if `multiprocessing` forks the Python interpreter? Have you looked at what happens to the clinet's background threads? I've had multiple problems with multiprocessing that refused to work in the presence of non-picklable objects even if they were never passed between processes. Mutli-threading deadlocks with a lot of C extensions, I've seen `numpy` break if it was used on unrelated arrays in different threads. -- You are receiving this because you are subscribed to this thread. Reply to this email directly or view it on GitHub: https://github.com/xrootd/xrootd/issues/462#issuecomment-282345976 ######################################################################## Use REPLY-ALL to reply to list To unsubscribe from the XROOTD-DEV list, click the following link: https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=XROOTD-DEV&A=1