Bart Wensley ccd59a0711 Handle REST API timeouts gracefully in the VIM ... The VIM is leaking FDs. The problem happens as follows: - The VIM has worker processes that are used to communicate with other processes through their REST APIs (e.g. sysinv, nova, cinder). The VIM does not specify a timeout when sending REST API requests. - The VIM does have a timeout for how long a worker process takes to process a request, which can vary depending on the request. - If the worker process sends a REST API request and does not get a response in time (e.g. because a message is lost or the target process is down), the VIM terminates the worker process. This is being done with a call to Process.terminate in the python multiprocessing library. The docs for this library clearly indicate that Process.terminate should not be used for a process that uses any shared resources (e.g. pipes). In this case, the worker processes are using shared resources (pipes for one) and these resources are not freed, leading to the FD leak. The solution is to ensure that a timeout is set when sending REST API requests. This timeout must be less than the worker timeout to ensure that the workers do not timeout (and leak FDs) except in the rarest of cases. Change-Id: Iccff914e86224be96689738cdcc536a4d5acb861 Closes-Bug: 1862049 Signed-off-by: Bart Wensley <barton.wensley@windriver.com>		2020-06-03 11:37:56 -05:00
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nfv_common	Handle REST API timeouts gracefully in the VIM	2020-06-03 11:37:56 -05:00
LICENSE	small cleanup required by OBS badness check - exec rights on non executable not allowed	2019-09-17 08:54:22 +02:00
setup.py	Clean up imports based on flake8	2018-09-20 16:43:28 -05:00