How to clear Apache httpd semaphores
Issue
- While using httpd, we receive the message when starting httpd; "No space left on device: Cannot create SSLMutex."
- Apache was terminated and didn't clean up its semaphores.
- How to identify the semaphores that are not being used by any process and remove them.
Environment
- Apache httpd
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
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