Address family not supported by protocol for GRPC Netty

Question

I'm getting the following error when deployed to a remote host:

Wrapped by: io.grpc.netty.shaded.io.netty.channel.AbstractChannel$AnnotatedConnectException: connect(..) failed: Address family not supported by protocol: /somegrpcservice-grpc.abc.com:443
Wrapped by: io.grpc.StatusRuntimeException: UNAVAILABLE: io exception
    at io.grpc.stub.ClientCalls.toStatusRuntimeException(ClientCalls.java:271)
    at io.grpc.stub.ClientCalls.getUnchecked(ClientCalls.java:252)
    at io.grpc.stub.ClientCalls.blockingUnaryCall(ClientCalls.java:165)

I'm deploying using a fatjar, when run locally everything fine. It is only when the service is deployed to a remote host. Some things I've already tried:

Various version of io.grpc:grpc-netty-shaded from 1.30.0 to 1.53.0
Running Ncat from the remote host and successfully connecting
Setting system property: -Djava.net.preferIPv4Stack=true

None of these seemed to make a difference. Appreciate if anyone else has any ideas. Thanks!

Describe more of how you're making a fatjar. See https://github.com/grpc/grpc-java/issues/9387 — Eric Anderson, Feb 23 '23 at 15:32
Using gradle and [shadow plugin](https://github.com/johnrengelman/shadow) — rocksnslopes, Feb 23 '23 at 18:18

score 1 · Answer 1 · edited Feb 24 '23 at 18:30

1

Found the solution for my particular case here:

gRPC UnsupportedAddressTypeException, but only when packaged with shadowJar

Apparently my fat jar was being packaged incorrectly and I needed to use the mergeServiceFiles() function from shadowJar in order to merge my service files.

edited Feb 24 '23 at 18:30

Eric Anderson

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answered Feb 24 '23 at 00:53

rocksnslopes

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Address family not supported by protocol for GRPC Netty

1 Answers1