Getting IllegalArgumentException: Address types of NameResolver 'unix' for 'pubsub.googleapis.com:443' not supported by transport

[MoonOKC]

Deploying GCP Cloud function with Java 17 and <kotlin.version>2.0.20</kotlin.version>
. Have a PubsubClient which tries to build a Publisher from

 <dependency>
            <groupId>com.google.cloud</groupId>
            <artifactId>google-cloud-pubsub</artifactId>
</dependency> 

, and started to have issue with an upgrade in the below bom.

<groupId>com.google.cloud</groupId>
<artifactId>libraries-bom</artifactId>
<version>26.45.0</version>

that bom uses google-cloud-pubsub:1.132.1

and function is working with

<groupId>com.google.cloud</groupId>
<artifactId>libraries-bom</artifactId>
<version>26.44.0</version>

Code example

 private val publisher: Publisher = Publisher.newBuilder(
        TopicName.of(
            System.getenv("PROJECT_ID") ?: "myProjectID",
            System.getenv("TEST_TOPIC_ID") ?: "test-topic"
        )
    ).build()

this build() line references to (PubSubClient.kt:22) mentioned in the below stacktrace

Stack trace

Caused by: java.lang.IllegalArgumentException: Address types of NameResolver 'unix' for 'pubsub.googleapis.com:443' not supported by transport
	at io.grpc.internal.ManagedChannelImplBuilder.getNameResolverProvider(ManagedChannelImplBuilder.java:849)
	at io.grpc.internal.ManagedChannelImplBuilder.build(ManagedChannelImplBuilder.java:699)
	at io.grpc.ForwardingChannelBuilder2.build(ForwardingChannelBuilder2.java:272)
	at com.google.api.gax.grpc.InstantiatingGrpcChannelProvider.createSingleChannel(InstantiatingGrpcChannelProvider.java:489)
	at com.google.api.gax.grpc.ChannelPool.<init>(ChannelPool.java:106)
	at com.google.api.gax.grpc.ChannelPool.create(ChannelPool.java:84)
	at com.google.api.gax.grpc.InstantiatingGrpcChannelProvider.createChannel(InstantiatingGrpcChannelProvider.java:262)
	at com.google.api.gax.grpc.InstantiatingGrpcChannelProvider.getTransportChannel(InstantiatingGrpcChannelProvider.java:256)
	at com.google.api.gax.rpc.ClientContext.create(ClientContext.java:236)
	at com.google.cloud.pubsub.v1.stub.GrpcPublisherStub.create(GrpcPublisherStub.java:203)
	at com.google.cloud.pubsub.v1.Publisher.<init>(Publisher.java:202)
	at com.google.cloud.pubsub.v1.Publisher.<init>(Publisher.java:91)
	at com.google.cloud.pubsub.v1.Publisher$Builder.build(Publisher.java:889)
	at com.myCompany.PubSubClient.<init>(PubSubClient.kt:22)

[michaelpri10]

Hello! This appears to be an issues within the underlying gRPC library used by the Pub/Sub Java client. From occurrences of similar issues (e.g., grpc/grpc-java#10853, grpc/grpc-java#10826), this may be an issue caused when building the "fat" jar, specifically when merging the service files. This comment and the following comment regarding the maven-shade-plugin may be helpful here. Please let me know if there are issues with following the linked advice for adjusting the build configuration.