centos下运行卡死 CPU100%

几个小时后，出现卡死， pstack info
```
Thread 13 (Thread 0x7f0d5b84c700 (LWP 3246)):
#0  0x00007f0d5cf461ad in nanosleep () from /lib64/libc.so.6
#1  0x00007f0d5cf76ec4 in usleep () from /lib64/libc.so.6
#2  0x00000000004710ed in LogThread::run() ()
#3  0x00007f0d5da33070 in ?? () from /lib64/libstdc++.so.6
#4  0x00007f0d5d251e25 in start_thread () from /lib64/libpthread.so.0
#5  0x00007f0d5cf7f34d in clone () from /lib64/libc.so.6
Thread 12 (Thread 0x7f0d5a2b7700 (LWP 3248)):
#0  0x00007f0d5cf461ad in nanosleep () from /lib64/libc.so.6
#1  0x00007f0d5cf76ec4 in usleep () from /lib64/libc.so.6
#2  0x00007f0d5157afc2 in SocketPool::Connect(std::string const&, int) () from /opt/cppweb/webapp/etc/plugin/bin/TraceModule.so
#3  0x00007f0d51512fbd in HttpHelper::Connect(std::string const&, int, bool) () from /opt/cppweb/webapp/etc/plugin/bin/TraceModule.so
#4  0x00007f0d5151350b in HttpHelper::GetResult(std::string const&, std::string const&, std::map<std::string, std::string, std::less<std::string>, std::allocator<std::pair<std::string const, std::string> > > const&, bool) () from /opt/cppweb/webapp/etc/plugin/bin/TraceModule.so
#5  0x00007f0d51515208 in HttpHelper::GetResult(std::string const&, std::string const&, bool) () from /opt/cppweb/webapp/etc/plugin/bin/TraceModule.so
#6  0x00007f0d514f601a in LoggerWorkItem::tryUpload() () from /opt/cppweb/webapp/etc/plugin/bin/TraceModule.so
#7  0x00007f0d514f63e5 in LoggerWorkItem::run() () from /opt/cppweb/webapp/etc/plugin/bin/TraceModule.so
#8  0x00000000004809d9 in TaskQueue::run() ()
#9  0x00007f0d5da33070 in ?? () from /lib64/libstdc++.so.6
#10 0x00007f0d5d251e25 in start_thread () from /lib64/libpthread.so.0
#11 0x00007f0d5cf7f34d in clone () from /lib64/libc.so.6
Thread 11 (Thread 0x7f0d59ab6700 (LWP 3249)):
#0  0x00007f0d5cf461ad in nanosleep () from /lib64/libc.so.6
#1  0x00007f0d5cf76ec4 in usleep () from /lib64/libc.so.6
#2  0x00000000004809ac in TaskQueue::run() ()
#3  0x00007f0d5da33070 in ?? () from /lib64/libstdc++.so.6
#4  0x00007f0d5d251e25 in start_thread () from /lib64/libpthread.so.0
#5  0x00007f0d5cf7f34d in clone () from /lib64/libc.so.6
Thread 10 (Thread 0x7f0d592b5700 (LWP 3250)):
#0  0x00007f0d5cf461ad in nanosleep () from /lib64/libc.so.6
#1  0x00007f0d5cf76ec4 in usleep () from /lib64/libc.so.6
#2  0x00007f0d5157afc2 in SocketPool::Connect(std::string const&, int) () from /opt/cppweb/webapp/etc/plugin/bin/TraceModule.so
#3  0x00007f0d51512fbd in HttpHelper::Connect(std::string const&, int, bool) () from /opt/cppweb/webapp/etc/plugin/bin/TraceModule.so
#4  0x00007f0d5151350b in HttpHelper::GetResult(std::string const&, std::string const&, std::map<std::string, std::string, std::less<std::string>, std::allocator<std::pair<std::string const, std::string> > > const&, bool) () from /opt/cppweb/webapp/etc/plugin/bin/TraceModule.so
#5  0x00007f0d51515208 in HttpHelper::GetResult(std::string const&, std::string const&, bool) () from /opt/cppweb/webapp/etc/plugin/bin/TraceModule.so
#6  0x00007f0d514f601a in LoggerWorkItem::tryUpload() () from /opt/cppweb/webapp/etc/plugin/bin/TraceModule.so
#7  0x00007f0d514f63e5 in LoggerWorkItem::run() () from /opt/cppweb/webapp/etc/plugin/bin/TraceModule.so
#8  0x00000000004809d9 in TaskQueue::run() ()
#9  0x00007f0d5da33070 in ?? () from /lib64/libstdc++.so.6
#10 0x00007f0d5d251e25 in start_thread () from /lib64/libpthread.so.0
#11 0x00007f0d5cf7f34d in clone () from /lib64/libc.so.6
Thread 9 (Thread 0x7f0d58ab4700 (LWP 3251)):
#0  0x00007f0d5cf461ad in nanosleep () from /lib64/libc.so.6
#1  0x00007f0d5cf76ec4 in usleep () from /lib64/libc.so.6
#2  0x00007f0d5195b3a2 in SocketPool::Connect(std::string const&, int) () from /opt/cppweb/webapp/etc/plugin/bin/RouteModule.so
#3  0x00007f0d518dd40d in HttpHelper::Connect(std::string const&, int, bool) () from /opt/cppweb/webapp/etc/plugin/bin/RouteModule.so
#4  0x00007f0d518eaea4 in HttpRequest::getResponse(std::string const&, int, bool, bool, int) const () from /opt/cppweb/webapp/etc/plugin/bin/RouteModule.so
#5  0x00007f0d518eaf84 in HttpRequest::getResult(std::string const&, int, bool, bool, int) const () from /opt/cppweb/webapp/etc/plugin/bin/RouteModule.so
#6  0x00007f0d518c26c0 in PingWorkItem::process() () from /opt/cppweb/webapp/etc/plugin/bin/RouteModule.so
#7  0x00007f0d518c3919 in PingWorkItem::runnable() () from /opt/cppweb/webapp/etc/plugin/bin/RouteModule.so
#8  0x00000000004808be in TaskQueue::run() ()
#9  0x00007f0d5da33070 in ?? () from /lib64/libstdc++.so.6
#10 0x00007f0d5d251e25 in start_thread () from /lib64/libpthread.so.0
#11 0x00007f0d5cf7f34d in clone () from /lib64/libc.so.6
Thread 8 (Thread 0x7f0d53fff700 (LWP 3252)):
#0  0x00007f0d5cf461ad in nanosleep () from /lib64/libc.so.6
#1  0x00007f0d5cf76ec4 in usleep () from /lib64/libc.so.6
#2  0x00000000004809ac in TaskQueue::run() ()
#3  0x00007f0d5da33070 in ?? () from /lib64/libstdc++.so.6
#4  0x00007f0d5d251e25 in start_thread () from /lib64/libpthread.so.0
#5  0x00007f0d5cf7f34d in clone () from /lib64/libc.so.6
Thread 7 (Thread 0x7f0d537fe700 (LWP 3253)):
#0  0x00007f0d5cf461ad in nanosleep () from /lib64/libc.so.6
#1  0x00007f0d5cf76ec4 in usleep () from /lib64/libc.so.6
#2  0x00000000004809ac in TaskQueue::run() ()
#3  0x00007f0d5da33070 in ?? () from /lib64/libstdc++.so.6
#4  0x00007f0d5d251e25 in start_thread () from /lib64/libpthread.so.0
#5  0x00007f0d5cf7f34d in clone () from /lib64/libc.so.6
Thread 6 (Thread 0x7f0d52ffd700 (LWP 3254)):
#0  0x00007f0d5cf461ad in nanosleep () from /lib64/libc.so.6
#1  0x00007f0d5cf76ec4 in usleep () from /lib64/libc.so.6
#2  0x00000000004809ac in TaskQueue::run() ()
#3  0x00007f0d5da33070 in ?? () from /lib64/libstdc++.so.6
#4  0x00007f0d5d251e25 in start_thread () from /lib64/libpthread.so.0
#5  0x00007f0d5cf7f34d in clone () from /lib64/libc.so.6
Thread 5 (Thread 0x7f0d527fc700 (LWP 3255)):
#0  0x00007f0d5cf461ad in nanosleep () from /lib64/libc.so.6
#1  0x00007f0d5cf76ec4 in usleep () from /lib64/libc.so.6
#2  0x00007f0d5157afc2 in SocketPool::Connect(std::string const&, int) () from /opt/cppweb/webapp/etc/plugin/bin/TraceModule.so
#3  0x00007f0d51512fbd in HttpHelper::Connect(std::string const&, int, bool) () from /opt/cppweb/webapp/etc/plugin/bin/TraceModule.so
#4  0x00007f0d5151350b in HttpHelper::GetResult(std::string const&, std::string const&, std::map<std::string, std::string, std::less<std::string>, std::allocator<std::pair<std::string const, std::string> > > const&, bool) () from /opt/cppweb/webapp/etc/plugin/bin/TraceModule.so
#5  0x00007f0d51515208 in HttpHelper::GetResult(std::string const&, std::string const&, bool) () from /opt/cppweb/webapp/etc/plugin/bin/TraceModule.so
#6  0x00007f0d514f61e0 in LoggerWorkItem::tryUpload() () from /opt/cppweb/webapp/etc/plugin/bin/TraceModule.so
#7  0x00007f0d514f63e5 in LoggerWorkItem::run() () from /opt/cppweb/webapp/etc/plugin/bin/TraceModule.so
#8  0x00000000004809d9 in TaskQueue::run() ()
#9  0x00007f0d5da33070 in ?? () from /lib64/libstdc++.so.6
#10 0x00007f0d5d251e25 in start_thread () from /lib64/libpthread.so.0
#11 0x00007f0d5cf7f34d in clone () from /lib64/libc.so.6
Thread 4 (Thread 0x7f0d4fcd4700 (LWP 3262)):
#0  0x00007f0d5cf461ad in nanosleep () from /lib64/libc.so.6
#1  0x00007f0d5cf76ec4 in usleep () from /lib64/libc.so.6
#2  0x00007f0d51596720 in TimerTaskQueue::run() () from /opt/cppweb/webapp/etc/plugin/bin/TraceModule.so
#3  0x00007f0d5da33070 in ?? () from /lib64/libstdc++.so.6
#4  0x00007f0d5d251e25 in start_thread () from /lib64/libpthread.so.0
#5  0x00007f0d5cf7f34d in clone () from /lib64/libc.so.6
Thread 3 (Thread 0x7f0d4ecd2700 (LWP 3309)):
#0  0x00007f0d5d25898d in accept () from /lib64/libpthread.so.0
#1  0x00000000004956be in ServerSocketAccept ()
#2  0x0000000000495ede in ServerSocketLoop ()
#3  0x000000000041f80e in std::thread::_Impl<std::_Bind_simple<HttpServer::loop()::{lambda()#2} ()> >::_M_run() ()
#4  0x00007f0d5da33070 in ?? () from /lib64/libstdc++.so.6
#5  0x00007f0d5d251e25 in start_thread () from /lib64/libpthread.so.0
#6  0x00007f0d5cf7f34d in clone () from /lib64/libc.so.6
Thread 2 (Thread 0x7f0d4f4d3700 (LWP 3310)):
#0  0x00007f0d5cf7f923 in epoll_wait () from /lib64/libc.so.6
#1  0x00000000004953c8 in MainProcess ()
#2  0x00000000004960da in ThreadFunction ()
#3  0x00007f0d5d251e25 in start_thread () from /lib64/libpthread.so.0
#4  0x00007f0d5cf7f34d in clone () from /lib64/libc.so.6
Thread 1 (Thread 0x7f0d5e96c880 (LWP 3245)):
#0  0x00007f0d5d25898d in accept () from /lib64/libpthread.so.0
#1  0x00000000004956be in ServerSocketAccept ()
#2  0x0000000000495ede in ServerSocketLoop ()
#3  0x000000000042395c in HttpServer::loop() ()
#4  0x00000000004081fc in HttpApplication::main() ()
#5  0x00000000004079b9 in main ()

```

寻根/cppweb

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