Compatibility shims issue with protobuf dependency

[jayhof]

Thank you for all the work in keeping this platform open-source ❤️

I'm trying to deploy opensnowcat-enrich on GCP with the pubsub connector and ran into an issue with the version of the protobuf dependency.

Here's the relevant part of the logged error:

ERROR com.snowplowanalytics.snowplow.enrich.common.fs2.Enrich - Unexpected error in enrich
com.permutive.pubsub.consumer.grpc.PubsubGoogleConsumer$InternalPubSubError: Internal Java PubSub consumer failed
Caused by: java.lang.IllegalStateException: Expected the service InnerService [FAILED] to be RUNNING, but the service has FAILED
        at com.google.common.util.concurrent.AbstractService.checkCurrentState(AbstractService.java:384)
        at com.google.common.util.concurrent.AbstractService.awaitRunning(AbstractService.java:308)
        at com.google.api.core.AbstractApiService.awaitRunning(AbstractApiService.java:95)
        at com.google.cloud.pubsub.v1.Subscriber.startConnections(Subscriber.java:379)
        at com.google.cloud.pubsub.v1.Subscriber.startStreamingConnections(Subscriber.java:341)
        at com.google.cloud.pubsub.v1.Subscriber.access$1400(Subscriber.java:91)
        at com.google.cloud.pubsub.v1.Subscriber$1.run(Subscriber.java:282)
        at java.base/java.lang.Thread.run(Unknown Source)
Caused by: java.lang.NoClassDefFoundError: com/google/protobuf/GeneratedMessageV3$Builder
        at java.base/java.lang.ClassLoader.defineClass1(Native Method)
        at java.base/java.lang.ClassLoader.defineClass(Unknown Source)
        at java.base/java.security.SecureClassLoader.defineClass(Unknown Source)
        at java.base/jdk.internal.loader.BuiltinClassLoader.defineClass(Unknown Source)
        at java.base/jdk.internal.loader.BuiltinClassLoader.findClassOnClassPathOrNull(Unknown Source)
        at java.base/jdk.internal.loader.BuiltinClassLoader.loadClassOrNull(Unknown Source)
        at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(Unknown Source)
        at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(Unknown Source)
        at java.base/java.lang.ClassLoader.loadClass(Unknown Source)
        at com.google.pubsub.v1.StreamingPullRequest.toBuilder(StreamingPullRequest.java:866)
        at com.google.pubsub.v1.StreamingPullRequest.newBuilder(StreamingPullRequest.java:857)
        at com.google.cloud.pubsub.v1.StreamingSubscriberConnection.initialize(StreamingSubscriberConnection.java:237)
        at com.google.cloud.pubsub.v1.StreamingSubscriberConnection.doStart(StreamingSubscriberConnection.java:146)
        at com.google.api.core.AbstractApiService$InnerService.doStart(AbstractApiService.java:147)
        at com.google.common.util.concurrent.AbstractService.startAsync(AbstractService.java:252)
        at com.google.api.core.AbstractApiService.startAsync(AbstractApiService.java:119)
        at com.google.cloud.pubsub.v1.Subscriber.startConnections(Subscriber.java:376)
        ... 4 more
Caused by: java.lang.ClassNotFoundException: com.google.protobuf.GeneratedMessageV3$Builder
        at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(Unknown Source)
        at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(Unknown Source)
        at java.base/java.lang.ClassLoader.loadClass(Unknown Source)
        ... 21 more

This issue was introduced with protobuf 4.26.0 and has since been fixed: protocolbuffers/protobuf@df8a11e

I've forked the repo, updated protobuf to version 4.28.3, pushed to my own docker repo, deployed this updated image and was able to verify this fixed the issue.