http://127.0.0.1:7890/jack is 400. How can I debug.

[童虎]

I use docker to build aosp android-6.0.0_r2(MRA58N). 

Docker version: android-6.0.0_r2

Dockfile: https://gist.github.com/huhuang03/ecca29e6ce2bc918b89655650f2f7101

I have already unset the proxy.

But when I run `m`. The error is:

```

Launching background server java -Dfile.encoding=UTF-8 -Xms2560m -XX:+TieredCompilation -jar out/host/linux-x86/framework/jack-launcher.jar -cp out/host/linux-x86/framework/jack.jar com.android.jack.server.JackSimpleServer

ERROR: Bad request, see Jack server log (/tmp/jack-root/jack-8072.log)

```

I have tried start jack server manually by

java -Dfile.encoding=UTF-8 -Xms2560m -XX:+TieredCompilation  -jar out/host/linux-x86/framework/jack-launcher.jar  -cp out/host/linux-x86/framework/jack.jar com.android.jack.server.JackSimpleServer 8072 8073 1 4 60

And then request by shell:

```

HTTP_CODE=$(curl http://127.0.0.1:8072/jack --write-out %{http_code})

echo "curl result: $?"

echo "HTTP_CODE: $HTTP_CODE"

```

The the curl result is 0 and HTTP_CODE is 400.

How can I debug this? Thank you.