Hello! New to the Avro world. I have been evaluating Flume and testing various capabilities. I have run into an issue with the Avro RPC piece. So far, I have found that the Flume Avro RPC java client works with a Flume Avro Source as expected (I believe these implementations use Netty). However, when I tried using a Ruby RPC client to communicate with the Flume Avro Source, there was a failure and the source reported:
org.apache.avro.AvroRuntimeException: Excessively large list allocation request detected: 539959368 items! Connection closed. I then tried this with a Python RPC client and had a similar issue. I suspected client/server Avro interop issues, so then verified that a Python Avro RPC client and Python Avro RPC server communicate correctly (using https://github.com/phunt/avro-rpc-quickstart). Also verified that Ruby Avro RPC client and Ruby Avro RPC server communicate correctly. However, using the Python Avro RPC client with Ruby Avro RPC server fails (client hangs), and Ruby client with Python server also fails (again, client hangs). I know I'm not providing exhaustive info here, but I'm surprised to find out-of-the-box interop problems. Do folks regularly use these client/servers in various mixes (Java/Ruby/Python)? Are there particular gotchas or configurations that are not obvious? Thank you, Steve
