零星的崩溃

您好，我们使用drogon有段时间了，还是比较稳定的，但最近零星出现一些崩溃，堆栈信息如下：

```
(gdb) where
#0 0x00007f956e54115d in std::__detail::_List_node_base::_M_hook (this=0x7f9568103460, __position=0x7f95683bb420)
at /home/nwani/m3/conda-bld/compilers_linux-64_1560109574129/work/.build/x86_64-conda_cos6-linux-gnu/src/gcc/libstdc++-v3/src/c++98/list.cc:132
#1 0x00007f956ec13eea in trantor::SessionManager::store(std::__cxx11::basic_string, std::allocator > const&, trantor::InetAddress, ssl_session_st*, trantor::EventLoop*) ()
from /usr/local/lib/libhttp_util.so
#2 0x00007f956ec14e58 in OpenSSLProvider::processHandshake() () from /usr/local/lib/libhttp_util.so
#3 0x00007f956ec16fb7 in OpenSSLProvider::recvData(trantor::MsgBuffer*) () from /usr/local/lib/libhttp_util.so
#4 0x00007f956ec07185 in trantor::TcpConnectionImpl::readCallback() () from /usr/local/lib/libhttp_util.so
#5 0x00007f956ebfae68 in trantor::Channel::handleEventSafely() () from /usr/local/lib/libhttp_util.so
#6 0x00007f956ebfaf01 in trantor::Channel::handleEvent() () from /usr/local/lib/libhttp_util.so
#7 0x00007f956ebeab8c in trantor::EventLoop::loop() () from /usr/local/lib/libhttp_util.so
#8 0x00007f956eb1c90a in drogon::HttpAppFrameworkImpl::run() () from /usr/local/lib/libhttp_util.so
#9 0x00007f956e55419d in std::execute_native_thread_routine (__p=0xdc0bd0) at /home/nwani/m3/conda-bld/compilers_linux-64_1560109574129/work/.build/x86_64-conda_cos6-linux-gnu/src/gcc/libstdc++-v3/src/c++11/thread.cc:80
#10 0x00007f956e09f832 in start_thread () from /lib64/libc.so.6
#11 0x00007f956e03f480 in clone3 () from /lib64/libc.so.6
```

```
(gdb) where
#0 0x00007f0ad7d058ff in std::__detail::_Map_base, std::allocator >, std::pair, std::allocator > const, std::_List_iterator >, std::allocator, std::allocator > const, std::_List_iterator > >, std::__detail::_Select1st, std::equal_to, std::allocator > >, std::hash, std::allocator > >, std::__detail::_Mod_range_hashing, std::__detail::_Default_ranged_hash, std::__detail::_Prime_rehash_policy, std::__detail::_Hashtable_traits, true>::operator[](std::__cxx11::basic_string, std::allocator > const&) () from /usr/local/lib/libhttp_util.so
#1 0x00007f0ad7d05f16 in trantor::SessionManager::store(std::__cxx11::basic_string, std::allocator > const&, trantor::InetAddress, ssl_session_st*, trantor::EventLoop*) ()
from /usr/local/lib/libhttp_util.so
#2 0x00007f0ad7d06e58 in OpenSSLProvider::processHandshake() () from /usr/local/lib/libhttp_util.so
#3 0x00007f0ad7d08fb7 in OpenSSLProvider::recvData(trantor::MsgBuffer*) () from /usr/local/lib/libhttp_util.so
#4 0x00007f0ad7cf9185 in trantor::TcpConnectionImpl::readCallback() () from /usr/local/lib/libhttp_util.so
#5 0x00007f0ad7cece68 in trantor::Channel::handleEventSafely() () from /usr/local/lib/libhttp_util.so
#6 0x00007f0ad7cecf01 in trantor::Channel::handleEvent() () from /usr/local/lib/libhttp_util.so
#7 0x00007f0ad7cdcb8c in trantor::EventLoop::loop() () from /usr/local/lib/libhttp_util.so
#8 0x00007f0ad7cddaf0 in trantor::EventLoopThread::loopFuncs() () from /usr/local/lib/libhttp_util.so
#9 0x00007f0ad7200b23 in execute_native_thread_routine () from /lib64/libstdc++.so.6
#10 0x00007f0ad76a11ca in start_thread () from /lib64/libpthread.so.0
#11 0x00007f0ad68078d3 in clone () from /lib64/libc.so.6
```
可以请您看一下吗