Fix autotools build #4
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Summary: After 6c2142a, standalone mcrouter now deadlocks if the router configuration was incorrect. Spotted on facebook#449, where `test_unknown_named_handles` started failing due to the mcrouter process being tested never exiting. GDB [indicates](https://gist.github.com/mszabo-wikia/47916c5655deffdb95332e972a52caf8) a deadlock between three threads: ``` (gdb) info threads Id Target Id Frame * 1 Thread 0x7f7b4cce1e00 (LWP 211878) "mcrouter" syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38 2 Thread 0x7f7b43fff6c0 (LWP 211882) "mcr-cpuaux-0" syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38 3 Thread 0x7f7b49e0a6c0 (LWP 211879) "IOThreadPool0" syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38 ``` * Thread 1, the main thread, has triggered exit() and is waiting on the auxiliary thread pool to be destroyed. * Thread 2, an auxiliary thread pool thread, is in the process of destroying the CarbonRouterInstance due to 6c2142a and is blocked on destroying the virtual EVBs by child proxies. These however are ultimately sourced from the IO thread pool which is also used by AsyncMcServer. * Thread 3, an IO thread pool thread, is blocked by AsyncMcServer which is waiting to be started by later initialization code that never runs due to the config error, preventing the IO thread pool itself from being destroyed. Fix it by initializing the AsyncMcServer only after the router has been initialized. Pull Request resolved: facebook#455 Reviewed By: lenar-f Differential Revision: D67069250 Pulled By: disylh fbshipit-source-id: d6edff40b9f40ee7925e94c4ee9cf985c10a98de
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