AWS Invalid API Key. What did I miss ?

[srikanthvpai]

AWS MSK Provisioned cluster. One of the bootstrap servers : b-1.<>.kafka.us-east-1.amazonaws.com:9098

Started kafka proxy on an ec2 which has a role with admin control on MSK and the profile dev mentioned in this command has admin access on everything. Still it throws invalid api key. What did I miss ? Started kafka-proxy with below cluster

kafka-proxy server --bootstrap-server-mapping "b-1.<>.kafka.us-east-1.amazonaws.com:9098,<>:30001" --tls-enable --tls-insecure-skip-verify --sasl-enable --sasl-method "AWS_MSK_IAM" --sasl-aws-region us-east-1 --log-level debug --sasl-aws-profile dev

A java client tried to send 100 messages to <>:30001 using the following properties

properties.put("security.protocol","SASL_SSL");
properties.put("sasl.mechanism","AWS_MSK_IAM");
properties.put("sasl.jaas.config","software.amazon.msk.auth.iam.IAMLoginModule required;");
properties.put("sasl.client.callback.handler.class","software.amazon.msk.auth.iam.IAMClientCallbackHandler");

But the console in the kafka-proxy ec2 says :

INFO[2024-04-30T04:23:36Z] New connection for b-1.<>.kafka.us-east-1.amazonaws.com:9098
DEBU[2024-04-30T04:23:36Z] Successful IAM SASL handshake. Available mechanisms: [OAUTHBEARER AWS_MSK_IAM]
DEBU[2024-04-30T04:23:36Z] Kafka request key -16639, version 1, length 369296129
INFO[2024-04-30T04:23:36Z] Reading data from local connection on <>:30001 from <>:63893 (b-1.<>.kafka.us-east-1.amazonaws.com:9098) had error: api key -16639 is invalid

I am just trying to place a proxy between the client and msk cluster. Please help.