interop tests fails against java server

Interop fails w/ Kotlin Client vs Java Server:

# In grpc-java
./run-test-server.sh --use_tls=true

# In grpc-kotlin
./run-test-client.sh --server_host_override=foo.test.google.fr --use_test_ca=true --test_case=unimplemented_service

Or, Java Client vs Kotlin Server

# in grpc-kotlin
./run-test-server.sh --use_tls=true

# In grpc-java
./run-test-client.sh --server_host_override=foo.test.google.fr --use_test_ca=true --test_case=unimplemented_service

Kotlin client + Kotlin server passed though.

[jtattermusch]

Note that the ca.pem, server.pem etc. were updated very recently in grpc-java (and in all other repos). https://github.com/grpc/grpc-java/pull/6841/files

Could that be the reason why tests are failing?

Btw, having wrong certificates is something that should be possible to tell from the test’s error log (“failed handshake becuase XYZ”). What did the failed test print? Could that message be improved?

[saturnism]

@chalin interop build seems broken; we still need #33 to run interop on open source.