No response when auto tunning in android device

Hi, I am a beginner in TVM. When I try to test auto tunning in android device, it hall on a long time, then throw except.

I build tvm_rpc based on this link, then try to test android_rpc_test.py.

The test step is list below:

  1. I launch up rpc in linux server by this command:
python -m tvm.exec.rpc_tracker --host=109.XXX.XXX.XXX --port=9190
  1. I run the rpc apk in android device, and then check the device in linux by below command:
python -m tvm.exec.query_rpc_tracker --host=109.XXX.XXX.XXX --port 9190

The result list as below:

Tracker address 109.XXX.XXX.XXX:9190

Server List
----------------------------
server-address  key
----------------------------
109.XXX.XXX.XXX:53014    server:android
----------------------------

Queue Status
-------------------------------
key       total  free  pending
-------------------------------
android   1      1     0
-------------------------------
  1. Then I begin to test the example:
$ export TVM_TRACKER_HOST=109.XXX.XXX.XXX
$ export TVM_TRACKER_PORT=9190
$ export TVM_NDK_CC=/opt/prebuilts/android-ndk-r16b/android-toolchain-arm64/bin/aarch64-linux-android-g++
$ python android_rpc_test.py

After I run the python scrpit, it hang on “tracker.request(key, priority=0, session_timeout=60)”, and after a long time, it report the below error message:

Traceback (most recent call last):
  File "android_rpc_test.py", line 154, in <module>
    test_rpc_module()
  File "android_rpc_test.py", line 64, in test_rpc_module
    remote = tracker.request(key, priority=0, session_timeout=60)
  File "/home/shaohaizhu/workspace/tvm/python/tvm/rpc/client.py", line 400, in request
    raise RuntimeError(
RuntimeError: Cannot request android after 5 retry, last_error:Traceback (most recent call last):
  [bt] (4) /data/shaohaizhu/workspace/tvm/build/libtvm.so(TVMFuncCall+0x5f) [0x7fa9db4c26af]
  [bt] (3) /data/shaohaizhu/workspace/tvm/build/libtvm.so(+0x1ad4196) [0x7fa9db54c196]
  [bt] (2) /data/shaohaizhu/workspace/tvm/build/libtvm.so(tvm::runtime::RPCClientConnect(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, int, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, tvm::runtime::TVMArgs)+0xdd) [0x7fa9db54bbed]
  [bt] (1) /data/shaohaizhu/workspace/tvm/build/libtvm.so(tvm::runtime::RPCConnect(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, int, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, tvm::runtime::TVMArgs)+0x5b9) [0x7fa9db548b09]
  [bt] (0) /data/shaohaizhu/workspace/tvm/build/libtvm.so(+0x1ace1d2) [0x7fa9db5461d2]
  File "/home/shaohaizhu/workspace/tvm/src/runtime/rpc/rpc_socket_impl.cc", line 73
TVMError:
---------------------------------------------------------------
An internal invariant was violated during the execution of TVM.
Please read TVM's error reporting guidelines.
More details can be found here: https://discuss.tvm.ai/t/error-reporting/7793.
---------------------------------------------------------------
  Check failed: sock.Connect(addr) == false: Connect to 109.XXX.XXX.XXX:5001 failed

Not sure, Can you try change host to 0.0.0.0

python -m tvm.exec.rpc_tracker --host=0.0.0.0 --port=9190

python -m tvm.exec.query_rpc_tracker --host=0.0.0.0 --port 9190

export TVM_TRACKER_HOST=0.0.0.0