proxysql

Commit Graph

Author	SHA1	Message	Date
Javier Jaramago Fernández	9c56fafbd1	Fix worker threads stalling race condition on RESUME command During a RESUME operation, if a 'MySQL_Thread' is bootstrapping listeners (in `MySQL_Thread::run_BootstrapListener`) and detect that `MySQL_Threads_Handler::bootstrapping_listeners` is 'false', the thread prematurely shuts down its own bootstrapping flag from 'mypolls' (`ProxySQL_Poll::bootstrapping_listeners`). Since this thread wont ever bootstrap its corresponding listening sockets, the other working threads will be stalled waiting on it, eventually triggering the watchdog and crashing the instance. Since the bootstrapping operation is sequential, it's expected that all the threads but the one starting their listening sockets are in an active wait. A sensible delay has been introduced to reduce the overhead of such wait.	2 years ago
René Cannaò	bd7846f430	Move ProxySQL_Poll() to its own source file	3 years ago

Author

SHA1

Message

Date

Javier Jaramago Fernández

9c56fafbd1

Fix worker threads stalling race condition on RESUME command

During a RESUME operation, if a 'MySQL_Thread' is bootstrapping
listeners (in `MySQL_Thread::run_BootstrapListener`) and detect that
`MySQL_Threads_Handler::bootstrapping_listeners` is 'false', the thread
prematurely shuts down its own bootstrapping flag from 'mypolls'
(`ProxySQL_Poll::bootstrapping_listeners`). Since this thread wont ever
bootstrap its corresponding listening sockets, the other working threads
will be stalled waiting on it, eventually triggering the watchdog and
crashing the instance.

Since the bootstrapping operation is sequential, it's expected that all
the threads but the one starting their listening sockets are in an
active wait. A sensible delay has been introduced to reduce the overhead
of such wait.

René Cannaò

bd7846f430

Move ProxySQL_Poll() to its own source file

2 Commits (5816a7d9154e59b8a022e45eefb3f494fdc2790f)