Tink is not compatible with protobuf-java to v4.26.0

[lily-es]

Describe the bug:

Tink is not compatible with protobuf-java v4.26.0 due to a class being renamed. Attempting to initialize Tink when using protobuf v4.26.0 results in this error

java.lang.ExceptionInInitializerError: Exception 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/jdk.internal.loader.BuiltinClassLoader.defineClass(BuiltinClassLoader.java:862)
	at java.base/jdk.internal.loader.BuiltinClassLoader.findClassOnClassPathOrNull(BuiltinClassLoader.java:760)
	at java.base/jdk.internal.loader.BuiltinClassLoader.loadClassOrNull(BuiltinClassLoader.java:681)
	at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:639)
	at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:188)
	at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:526)
	at com.google.crypto.tink.hybrid.EciesAeadHkdfPublicKeyManager.<init>(EciesAeadHkdfPublicKeyManager.java:43)
	at com.google.crypto.tink.hybrid.HybridConfig.<clinit>(HybridConfig.java:44)
	... 83 more

What version of Tink are you using? 1.12.0

[pkoenig10]

By upgrading to protobuf-java 4.x, Tink is no longer compatible with protobuf-java 3.x. Most of the Java ecosystem is still using protobuf-java 3.x due to binary breaking changes in protobuf-java 4.x.

It seems like protobuf-java has committed to preserving backwards compatibility in order to allow consumers to upgrade, but this work is not yet complete.

https://github.com/protocolbuffers/protobuf/issues/16452

https://github.com/protocolbuffers/protobuf/issues/17247

Can we downgrade protobuf-java to the latest 3.x until this work is complete? Otherwise consumers will likely be prevented from taking Tink upgrades.

[morambro]

We released the [email protected] patch release which downgrades Protobuf to 25.3.