Clarify compatibility with Protobuf-Java 4.26.x+ #1965
Description
I guess this would be a continuation of #1690
Some fixes/removals of GeneratedMessageV3 were done there in #1692
However it's not clear if 4.26.x is supported/tested.
I hit a runtime error during classloading when running on 4.26.1.
Partial relevant stack trace:
Caused by: java.lang.NoClassDefFoundError: com/google/protobuf/GeneratedMessageV3
at java.base/java.lang.ClassLoader.defineClass1(Native Method)
at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:1027)
at java.base/java.security.SecureClassLoader.defineClass(SecureClassLoader.java:150)
at java.base/java.net.URLClassLoader.defineClass(URLClassLoader.java:524)
at java.base/java.net.URLClassLoader$1.run(URLClassLoader.java:427)
at java.base/java.net.URLClassLoader$1.run(URLClassLoader.java:421)
at java.base/java.security.AccessController.doPrivileged(AccessController.java:714)
at java.base/java.net.URLClassLoader.findClass(URLClassLoader.java:420)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:593)
at org.springframework.boot.loader.net.protocol.jar.JarUrlClassLoader.loadClass(JarUrlClassLoader.java:107)
at org.springframework.boot.loader.launch.LaunchedClassLoader.loadClass(LaunchedClassLoader.java:91)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:526)
at com.google.cloud.firestore.v1.stub.GrpcFirestoreStub.<clinit>(GrpcFirestoreStub.java:80)
at com.google.cloud.firestore.spi.v1.GrpcFirestoreRpc.<init>(GrpcFirestoreRpc.java:166)
at com.google.cloud.firestore.FirestoreOptions$DefaultFirestoreRpcFactory.create(FirestoreOptions.java:97)
at com.google.cloud.firestore.FirestoreOptions$DefaultFirestoreRpcFactory.create(FirestoreOptions.java:89)
at com.google.cloud.ServiceOptions.getRpc(ServiceOptions.java:602)
at com.google.cloud.firestore.FirestoreOptions.getFirestoreRpc(FirestoreOptions.java:443)
at com.google.cloud.firestore.FirestoreImpl.<init>(FirestoreImpl.java:82)
at com.google.cloud.firestore.FirestoreOptions$DefaultFirestoreFactory.create(FirestoreOptions.java:80)
at com.google.cloud.firestore.FirestoreOptions$DefaultFirestoreFactory.create(FirestoreOptions.java:73)
at com.google.cloud.ServiceOptions.getService(ServiceOptions.java:582)
GrpcFirestoreStub.java:80 has:
.setRequestMarshaller(ProtoUtils.marshaller(GetDocumentRequest.getDefaultInstance()))
Error happened when it tried to load class GetDocumentRequest which extends com.google.protobuf.GeneratedMessageV3
That file seems to be generated by protobufs compiler and hasn't changed during #1690
More background: the newer protobuf-java version came in transitively via mysql-connector-j which since version 9.x depends on protobuf-java 4.26.1. I excluded it as workaround and everything works, just would like to have a plan for when other dependencies might upgrade to newer protobuf version.