TiFlash日志如下：
[MPPTask.cpp:334] [“MPPTask:query:436122339549642851:10,task task running meets error: DB::Exception: keepalive watchdog timeout Stack Trace : 0. bin/tiflash/tiflash(StackTrace::StackTrace()+0x16) [0x36c1d76]\
1. bin/tiflash/tiflash(DB::Exception::Exception(std::__cxx11::basic_string<char, std::char_traits, std::allocator > const&, int)+0x26) [0x36b5ba6]\
2. bin/tiflash/tiflash(DB::SharedQueryBlockInputStream::readImpl()+0x410) [0x3703700]\
3. bin/tiflash/tiflash(DB::IProfilingBlockInputStream::read(DB::PODArray<unsigned char, 4096ul, Allocator, 15ul, 16ul>&, bool)+0x3bd) [0x6d8199d]\
4. bin/tiflash/tiflash(DB::IProfilingBlockInputStream::read()+0x17) [0x6d81b87]\
5. bin/tiflash/tiflash(DB::ExchangeSender::readImpl()+0x1b) [0x7cebbab]\
6. bin/tiflash/tiflash(DB::IProfilingBlockInputStream::read(DB::PODArray<unsigned char, 4096ul, Allocator, 15ul, 16ul>&, bool)+0x3bd) [0x6d8199d]\
7. bin/tiflash/tiflash(DB::IProfilingBlockInputStream::read()+0x17) [0x6d81b87]\
8. bin/tiflash/tiflash(DB::ParallelInputsProcessor<DB::UnionBlockInputStream<(DB::StreamUnionMode)0, true>::Handler, (DB::StreamUnionMode)0>::loop(unsigned long)+0x143) [0x7c51043]\
9. bin/tiflash/tiflash(DB::ParallelInputsProcessor<DB::UnionBlockInputStream<(DB::StreamUnionMode)0, true>::Handler, (DB::StreamUnionMode)0>::thread(unsigned long)+0x1cc) [0x7c5166c]\
10. bin/tiflash/tiflash(_ZNSt6thread11_State_implINS_8_InvokerISt5tupleIJZN2DB13ThreadFactory9newThreadISt8functionIFvvEEJEEES_bNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEOT_DpOT0_EUlDpOT_E_EEEEE6_M_runEv+0x63) [0x7daf993]\
11. bin/tiflash/tiflash() [0x8abcbef]\
12. /lib64/libpthread.so.0(+0x7e25) [0x7f0b9cea1e25]\
13. /lib64/libc.so.6(clone+0x6d) [0x7f0b9c8c9bad]\
”] [thread_id=31266451]