dukhlov
1cafff0871
Forking a process when multiple threads are running is an unsafe operation and could cause a lot of problems because only current thread will continue working in child thread. Any locked by other thread resource will remain locked forever. We faced with this problem during oslo.messaging development and added workaround to hide this problem: https://review.openstack.org/#/c/274255/ I tried to fix this problem in oslo.service: https://review.openstack.org/#/c/270832/ but oslo folks said that this fix is ugly and it is wrong way to add workarounds to common libraries because projects use them incorrectly. I think that is fair. So this patch fixes incorrect usage of oslo libraries. In this patch I extended functionality of NeutronWorker and add there `worker_process_count` parameter which determines how many processes should be spawned for this worker. If `worker_process_count` = 0 - don't create process and spawn thread in scope of current process for worker Then I moved all background tasks to workers and return them by `get_workers` method. start_plugin_workers collects plugin's workers using `get_workers` method and starts in ProcessLauncher first workers with `worker_process_count` > 0 and only after this starts threaded workers by simple Launcher Closes-bug: #1569404 Change-Id: I0544f1d47ae53d572adda872847a56fa0b202d2e
Welcome!
You have come across a cloud computing network fabric controller. It has identified itself as "Neutron." It aims to tame your (cloud) networking!
External Resources:
The homepage for Neutron is: http://launchpad.net/neutron. Use this site for asking for help, and filing bugs. Code is available on git.openstack.org at <http://git.openstack.org/cgit/openstack/neutron>.
The latest and most in-depth documentation on how to use Neutron is available at: <http://docs.openstack.org>. This includes:
- Neutron Administrator Guide
- Networking Guide
- Neutron API Reference:
-
http://docs.openstack.org/api/openstack-network/2.0/content/
- Current Neutron developer documentation is available at:
For help on usage and hacking of Neutron, please send mail to <mailto:openstack-dev@lists.openstack.org>.
For information on how to contribute to Neutron, please see the contents of the CONTRIBUTING.rst file.