used which requires a working POSIX semaphore implemen- tation, this is enabled in FreeBSD by default since FreeBSD 8.x. For older version of FreeBSD, you have to enable POSIX semaphores in the kernel and edge case bugs. The end result was that I had to rewrite the prefork pool to avoid the use of the POSIX semaphore. This was extremely challenging, but after months of hard work the worker now finally passes pool shared one queue between all child processes, using a POSIX semaphore as a mutex to achieve exclusive read and write access. The POSIX semaphore has now been removed and each child process gets a

used which requires a working POSIX semaphore implementation, this is enabled in FreeBSD by default since FreeBSD 8.x. For older version of FreeBSD, you have to enable POSIX semaphores in the kernel and edge case bugs. The end result was that I had to rewrite the prefork pool to avoid the use of the POSIX semaphore. This was extremely challenging, but after months of hard work the worker now finally passes pool shared one queue between all child processes, using a POSIX semaphore as a mutex to achieve exclusive read and write access. The POSIX semaphore has now been removed and each child process gets a

worker_shutting_down Dispatched when the worker begins the shutdown process. Provides arguments: • sig The POSIX signal that was received. • how The shutdown method, warm or cold. • exitcode The exitcode that used and requires a working POSIX semaphore implementation, this is enabled in FreeBSD by default since FreeBSD 8.x. For older version of FreeBSD, you have to enable POSIX semaphores in the kernel and edge case bugs. The end result was that I had to rewrite the prefork pool to avoid the use of the POSIX semaphore. This was extremely challenging, but after months of hard work the worker now finally passes

worker_shutting_down Dispatched when the worker begins the shutdown process. Provides arguments: sig The POSIX signal that was received. how The shutdown method, warm or cold. exitcode The exitcode that will used and requires a working POSIX semaphore implementation, this is enabled in FreeBSD by default since FreeBSD 8.x. For older version of FreeBSD, you have to enable POSIX semaphores in the kernel and edge case bugs. The end result was that I had to rewrite the prefork pool to avoid the use of the POSIX semaphore. This was extremely challenging, but after months of hard work the worker now finally passes

process. Provides arguments: 164 Chapter 2. Contents Celery Documentation, Release 4.2.1 • sig The POSIX signal that was received. • how The shutdown method, warm or cold. • exitcode The exitcode that used and requires a working POSIX semaphore implementation, this is enabled in FreeBSD by default since FreeBSD 8.x. For older version of FreeBSD, you have to enable POSIX semaphores in the kernel and (e.g., ENOENT). celery.platforms.ignore_errno(*args, **kwds) Context manager to ignore specific POSIX error codes. Takes a list of error codes to ignore: this can be either the name of the code, or the

worker_shutting_down Dispatched when the worker begins the shutdown process. Provides arguments: sig The POSIX signal that was received. how The shutdown method, warm or cold. exitcode The exitcode that will used and requires a working POSIX semaphore implementation, this is enabled in FreeBSD by default since FreeBSD 8.x. For older version of FreeBSD, you have to enable POSIX semaphores in the kernel and (e.g., ENOENT). celery.platforms.ignore_errno(*args, **kwds) Context manager to ignore specific POSIX error codes. Takes a list of error codes to ignore: this can be either the name of the code, or the

worker_shutting_down Dispatched when the worker begins the shutdown process. Provides arguments: sig The POSIX signal that was received. how The shutdown method, warm or cold. exitcode The exitcode that will used and requires a working POSIX semaphore implementation, this is enabled in FreeBSD by default since FreeBSD 8.x. For older version of FreeBSD, you have to enable POSIX semaphores in the kernel and (e.g., ENOENT). celery.platforms.ignore_errno(*args, **kwds) Context manager to ignore specific POSIX error codes. Takes a list of error codes to ignore: this can be either the name of the code, or the

worker_shutting_down Dispatched when the worker begins the shutdown process. Provides arguments: • sig The POSIX signal that was received. • how The shutdown method, warm or cold. • exitcode The exitcode that used and requires a working POSIX semaphore implementation, this is enabled in FreeBSD by default since FreeBSD 8.x. For older version of FreeBSD, you have to enable POSIX semaphores in the kernel and (e.g., ENOENT). celery.platforms.ignore_errno(*args, **kwds) Context manager to ignore specific POSIX error codes. Takes a list of error codes to ignore: this can be either the name of the code, or the

worker_shutting_down Dispatched when the worker begins the shutdown process. Provides arguments: • sig The POSIX signal that was received. • how The shutdown method, warm or cold. 164 Chapter 2. Contents Celery used and requires a working POSIX semaphore implementation, this is enabled in FreeBSD by default since FreeBSD 8.x. For older version of FreeBSD, you have to enable POSIX semaphores in the kernel and (e.g., ENOENT). celery.platforms.ignore_errno(*args, **kwds) Context manager to ignore specific POSIX error codes. Takes a list of error codes to ignore: this can be either the name of the code, or the

worker_shutting_down Dispatched when the worker begins the shutdown process. Provides arguments: sig The POSIX signal that was received. how The shutdown method, warm or cold. exitcode The exitcode that will used and requires a working POSIX semaphore implementation, this is enabled in FreeBSD by default since FreeBSD 8.x. For older version of FreeBSD, you have to enable POSIX semaphores in the kernel and (e.g., ENOENT). celery.platforms.ignore_errno(*args, **kwds) Context manager to ignore specific POSIX error codes. Takes a list of error codes to ignore: this can be either the name of the code, or the