Hi, I am trying to upload a schema to the registry for server side message validation in a [standalone-docker](https://pulsar.apache.org/docs/en/standalone-docker/) following the instructions on but all attempts result in a 500 Internal Server Error.
At the very least there is an improvement to be made in the error message and logs but I am starting to suspect that there is a bug Before I file a report, any suggestions on what I might be doing wrong? Cheers, Chris # Steps to reproduce 1. Run Pulsar [standalone-docker](https://pulsar.apache.org/docs/en/standalone-docker/) docker run -it \ -p 6650:6650 \ -p 8080:8080 \ -v $PWD/data:/pulsar/data \ apachepulsar/pulsar:2.4.1 \ bin/pulsar standalone 1. Produce messages to a public/default/my-topic ensuring that the `public/default/my-topic` exists: python3 - <<EOF import pulsar client = pulsar.Client('pulsar://localhost:6650') producer = client.create_producer('my-topic') for i in range(10): producer.send(('hello-pulsar-%d' % i).encode('utf-8')) client.close() EOF 1. Create empty schema accepting all JSON curl -i -X POST \ http://localhost:8080/admin/v2/schemas/public/default/my-topic/schema \ -H 'Content-Type: application/json' \ -H 'Host: localhost:8080' \ -d '{ "name": "Test", "type": "JSON", "schema": "{ }", "properties": { } } ' # Expected result * `200 OK` if there is nothing wrong in the sequence above * `409 Conflict` if there is a configuration error for the tenant, namespace or topic with a clear indication of the problem * `500 Internal Server Error` if this there is a real bug in the code with a stack trace logged at `ERROR` level In addition * Error messages should be in `text/plain` or possibly `application/json`; ideally the `Accept` header is respected. # Actual result HTTP/1.1 500 Internal Server Error Content-Type: text/html;charset=iso-8859-1 Content-Length: 388 Server: Jetty(9.4.12.v20180830) <html> <head> <meta http-equiv="Content-Type" content="text/html;charset=utf-8"/> <title>Error 500 Internal Server Error</title> </head> <body><h2>HTTP ERROR 500</h2> <p>Problem accessing /admin/v2/schemas/public/default/my-topic/schema. Reason: <pre> Internal Server Error</pre></p><hr><a href="http://eclipse.org/jetty";>Powered by Jetty:// 9.4.12.v20180830</a><hr/> </body> </html> The only log is the request, no stack trace and not other errors, warnings or info messages: 20:17:13.964 [pulsar-web-57-12] INFO org.eclipse.jetty.server.RequestLog - 172.17.0.1 - - [01/Dec/2019:20:17:13 +0000] "POST /admin/v2/schemas/public/default/my-topic/schema HTTP/1.1" 500 388 "-" "PostmanRuntime/7.17.1" 9
