brpc::Channel::CallMethod阻塞，不超时

[datatechboost]

Describe the bug (描述bug)

模块a 3个rpc调用阻塞，这3个rpc都是对模块b的调用，共涉及模块b的两个方法。
channel初始化时option为null, rpc调用时 brpc::Controller上set_timeout_ms了。
3个rpc调用中的2个是在协程中进行的，另1个是在timer线程（pthread）调用的。

补充：brpc::channel的init是加了锁的。

To Reproduce (复现方法)

让模块b死锁，模块a发起3个模块b的rpc。

Expected behavior (期望行为)

3个rpc超时返回。

Versions (各种版本)
OS:CentOS Linux release 7.8.2003 (Core)
Compiler: gcc 版本 4.8.5 20150623 (Red Hat 4.8.5-44) (GCC)
brpc:0.9.0
protobuf:3.0.0

Additional context/screenshots (更多上下文/截图)

[datatechboost]

3个堆栈的顶部，我已经使用内存检测工具排除了模块内存破坏的可能。

(gdb) bthread_frame 1
(gdb) bt
#0 0x00007f0157e4c95c in jump_stack (to=, from=) at /opt/data/code/vplatform_thirdparty/incubator-brpc-0.9.0/src/bthread/stack_inl.h:129
#1 bthread::TaskGroup::sched_to (pg=0x7f014802b810, pg@entry=0x7f010e55c470, next_meta=0x1, next_meta@entry=0x7f011800d420) at /opt/data/code/vplatform_thirdparty/incubator-brpc-0.9.0/src/bthread/task_group.cpp:603
#2 0x00007f0157e4e123 in sched_to (next_tid=, pg=0x7f010e55c470) at /opt/data/code/vplatform_thirdparty/incubator-brpc-0.9.0/src/bthread/task_group_inl.h:75
#3 bthread::TaskGroup::sched (pg=pg@entry=0x7f010e55c470) at /opt/data/code/vplatform_thirdparty/incubator-brpc-0.9.0/src/bthread/task_group.cpp:563
#4 0x00007f0157e3503b in bthread::butex_wait (arg=arg@entry=0x7f014802b590, expected_value=expected_value@entry=9, abstime=abstime@entry=0x0) at /opt/data/code/vplatform_thirdparty/incubator-brpc-0.9.0/src/bthread/butex.cpp:656
#5 0x00007f0157e3e790 in bthread_id_join (id=...) at /opt/data/code/vplatform_thirdparty/incubator-brpc-0.9.0/src/bthread/id.cpp:526
#6 0x00007f0157ebf45d in brpc::Channel::CallMethod (this=0x7f0118034418, method=0x7f011807e548, controller_base=0x7f010e55c740, request=0x7f010e55c6c0, response=0x7f010e55c700, done=0x0) at /opt/data/code/vplatform_thirdparty/incubator-brpc-0.9.0/src/brpc/channel.cpp:398

(gdb) bthread_frame 2
(gdb) bt
#0 0x00007f0157e4c95c in jump_stack (to=, from=) at /opt/data/code/vplatform_thirdparty/incubator-brpc-0.9.0/src/bthread/stack_inl.h:129
#1 bthread::TaskGroup::sched_to (pg=0x7f014802b810, pg@entry=0x7f010e056d20, next_meta=0x1, next_meta@entry=0x7f011000d420) at /opt/data/code/vplatform_thirdparty/incubator-brpc-0.9.0/src/bthread/task_group.cpp:603
#2 0x00007f0157e4e123 in sched_to (next_tid=, pg=0x7f010e056d20) at /opt/data/code/vplatform_thirdparty/incubator-brpc-0.9.0/src/bthread/task_group_inl.h:75
#3 bthread::TaskGroup::sched (pg=pg@entry=0x7f010e056d20) at /opt/data/code/vplatform_thirdparty/incubator-brpc-0.9.0/src/bthread/task_group.cpp:563
#4 0x00007f0157e3503b in bthread::butex_wait (arg=arg@entry=0x7f014802b410, expected_value=expected_value@entry=9, abstime=abstime@entry=0x0) at /opt/data/code/vplatform_thirdparty/incubator-brpc-0.9.0/src/bthread/butex.cpp:656
#5 0x00007f0157e3e790 in bthread_id_join (id=...) at /opt/data/code/vplatform_thirdparty/incubator-brpc-0.9.0/src/bthread/id.cpp:526
#6 0x00007f0157ebf45d in brpc::Channel::CallMethod (this=0x7f0118034418, method=0x7f011807e548, controller_base=0x7f010e056f90, request=0x7f010e056f10, response=0x7f010e056f50, done=0x0) at /opt/data/code/vplatform_thirdparty/incubator-brpc-0.9.0/src/brpc/channel.cpp:398

Thread 27 (Thread 0x7f0151e30700 (LWP 26847)):
#0 0x00007f0154751d19 in syscall () from /lib64/libc.so.6
#1 0x00007f0157e34283 in futex_wait_private (timeout=0x0, expected=0, addr1=0x7f0151e2f0e0) at /opt/data/code/vplatform_thirdparty/incubator-brpc-0.9.0/src/bthread/sys_futex.h:38
#2 bthread::wait_pthread (pw=..., ptimeout=ptimeout@entry=0x0) at /opt/data/code/vplatform_thirdparty/incubator-brpc-0.9.0/src/bthread/butex.cpp:138
#3 0x00007f0157e352bc in butex_wait_from_pthread (abstime=0x0, expected_value=1, b=0x7f014802b810, g=) at /opt/data/code/vplatform_thirdparty/incubator-brpc-0.9.0/src/bthread/butex.cpp:585
#4 bthread::butex_wait (arg=arg@entry=0x7f014802b810, expected_value=expected_value@entry=1, abstime=abstime@entry=0x0) at /opt/data/code/vplatform_thirdparty/incubator-brpc-0.9.0/src/bthread/butex.cpp:618
#5 0x00007f0157e3e790 in bthread_id_join (id=...) at /opt/data/code/vplatform_thirdparty/incubator-brpc-0.9.0/src/bthread/id.cpp:526
#6 0x00007f0157ebf45d in brpc::Channel::CallMethod (this=0x7f0118034418, method=0x7f011807e580, controller_base=0x7f0151e2f390, request=0x7f0151e2f2f0, response=0x7f0151e2f340, done=0x0) at /opt/data/code/vplatform_thirdparty/incubator-brpc-0.9.0/src/brpc/channel.cpp:398

(gdb) bthread_list 共6个
id tid function has stack total:6
#0 4294968066 0x7f0157f98b40 brpc::SocketMap::RunWatchConnections(void*) yes
#1 197568496390 0x7f0157f8cec0 brpc::Socket::ProcessEvent(void*) yes
#2 73014445571 0x7f0157f8cec0 brpc::Socket::ProcessEvent(void*) yes
#3 4294969600 0x7f0157ee92a0 brpc::GlobalUpdate(void*) yes
#4 4294969601 0x7f0157ee8d70 brpc::EventDispatcher::RunThis(void*) yes
#5 4294969602 0x7f0157f7f500 brpc::Server::UpdateDerivedVars(void*) yes

[chongg039]

@datatechboost hi请问这个问题后续有结论吗，我这边遇到了同样的问题

[wwbmmm]

3个rpc调用中的2个是在协程中进行的，另1个是在timer线程（pthread）调用的。

timer 回调里是不能执行CallMethod，这样会把timer thread阻塞，然后超时也就失效了。