Homebrew - protobuf and protoc-gen-grpc-java

[markeastwood1]

Output of brew config

% brew config
HOMEBREW_VERSION: 4.6.8-8-gab980dc
ORIGIN: https://github.com/Homebrew/brew
HEAD: ab980dc3b7e3f17cae49466a1c110b6ac3abeb83
Last commit: 21 hours ago
Branch: main
Core tap JSON: 02 Sep 18:39 UTC
Core cask tap JSON: 02 Sep 18:39 UTC
HOMEBREW_PREFIX: /opt/homebrew
HOMEBREW_CASK_OPTS: []
HOMEBREW_FORBID_PACKAGES_FROM_PATHS: set
HOMEBREW_MAKE_JOBS: 12
HOMEBREW_SORBET_RUNTIME: set
Homebrew Ruby: 3.4.5 => /opt/homebrew/Library/Homebrew/vendor/portable-ruby/3.4.5/bin/ruby
CPU: dodeca-core 64-bit arm_lobos
Clang: 17.0.0 build 1700
Git: 2.39.5 => /Library/Developer/CommandLineTools/usr/bin/git
Curl: 8.7.1 => /usr/bin/curl
macOS: 15.6.1-arm64
CLT: 16.4.0.0.1.1747106510
Xcode: N/A
Rosetta 2: false

Output of brew doctor

% brew doctor
Please note that these warnings are just used to help the Homebrew maintainers
with debugging if you file an issue. If everything you use Homebrew for is
working fine: please don't worry or file an issue; just ignore this. Thanks!

Warning: Unbrewed dylibs were found in /usr/local/lib.
If you didn't put them there on purpose they could cause problems when
building Homebrew formulae and may need to be deleted.

Unexpected dylibs:
  /usr/local/lib/libcdt.5.dylib
  /usr/local/lib/libcgraph.6.dylib
  /usr/local/lib/libgvc.6.dylib
  /usr/local/lib/libgvpr.2.dylib
  /usr/local/lib/libpathplan.4.dylib
  /usr/local/lib/libxdot.4.dylib

Warning: Unbrewed header files were found in /usr/local/include.
If you didn't put them there on purpose they could cause problems when
building Homebrew formulae and may need to be deleted.

Unexpected header files:
  /usr/local/include/graphviz/*

Warning: Unbrewed '.la' files were found in /usr/local/lib.
If you didn't put them there on purpose they could cause problems when
building Homebrew formulae and may need to be deleted.

Unexpected '.la' files:
  /usr/local/lib/libcdt.la
  /usr/local/lib/libcgraph.la
  /usr/local/lib/libgvc.la
  /usr/local/lib/libgvpr.la
  /usr/local/lib/libpathplan.la
  /usr/local/lib/libxdot.la

Warning: Unbrewed '.pc' files were found in /usr/local/lib/pkgconfig.
If you didn't put them there on purpose they could cause problems when
building Homebrew formulae and may need to be deleted.

Unexpected '.pc' files:
  /usr/local/lib/pkgconfig/libcdt.pc
  /usr/local/lib/pkgconfig/libcgraph.pc
  /usr/local/lib/pkgconfig/libgvc.pc
  /usr/local/lib/pkgconfig/libgvpr.pc
  /usr/local/lib/pkgconfig/libpathplan.pc
  /usr/local/lib/pkgconfig/libxdot.pc

Warning: Some taps are not on the default git origin branch and may not receive
updates. If this is a surprise to you, check out the default branch with:
  git -C $(brew --repo markeastwood/my-versions) checkout

Description of issue

I’m banging my head again the wall on this one. Everything seems to point back to how protobuf was installed… I’m on a MacBook Pro with M3 chip, running Sequoia 15.6.1. I’m using IntelliJ 2025.2 Ultimate and my little java project is using Coretto 21.0.8. I built a little example from gRPC Up and Running by Kasun Indrasiri. When I try to run my ’server’ or my ‘client’ I can’t get past this issue.

I’m just not seeing where 4.31.1 is coming from so I'm thinking it might be somewhere in what Homebrew installed.

Yes the generated code is definitely built with 4.32 I can see that in the generated classes so the issue is the runtime library.

Exception in thread "main" java.lang.ExceptionInInitializerError
      at com.fico.grpc1.ProductInfoGrpc.getAddProductMethod(ProductInfoGrpc.java:35)
      at com.fico.grpc1.ProductInfoGrpc.getServiceDescriptor(ProductInfoGrpc.java:402)
      at com.fico.grpc1.ProductInfoGrpc.bindService(ProductInfoGrpc.java:339)
      at com.fico.grpc1.ProductInfoGrpc$ProductInfoImplBase.bindService(ProductInfoGrpc.java:162)
      at io.grpc.internal.ServerImplBuilder.addService(ServerImplBuilder.java:145)
      at io.grpc.internal.ServerImplBuilder.addService(ServerImplBuilder.java:57)
      at io.grpc.ForwardingServerBuilder.addService(ForwardingServerBuilder.java:77)
      at com.fico.grpc1.ProductInfoServer.main(ProductInfoServer.java:14)
Caused by: com.google.protobuf.RuntimeVersion$ProtobufRuntimeVersionException: Detected incompatible Protobuf Gencode/Runtime versions when loading com.fico.grpc1.ProductInfoOuterClass$Product: gencode 4.32.0, runtime 4.31.1. Runtime version cannot be older than the linked gencode version.
      at com.google.protobuf.RuntimeVersion.validateProtobufGencodeVersionImpl(RuntimeVersion.java:120)
      at com.google.protobuf.RuntimeVersion.validateProtobufGencodeVersion(RuntimeVersion.java:68)
      at com.fico.grpc1.ProductInfoOuterClass$Product.<clinit>(ProductInfoOuterClass.java:84)
      ... 8 more

Thanks,
Mark

[cho-m]

Homebrew only provides a generator not the runtime. If you are seeing errors from runtime, then you need to fix in your local project.

Make sure you are getting a compatible version of com.google.protobuf.

• See https://central.sonatype.com/artifact/com.google.protobuf/protobuf-java/overview on how to update your build system

[markeastwood1]

I'll see what the link has to say and investigate... but there was nothing protobuf anything before Homebrew installed it so it comes from somewhere. Thank you.

[cho-m]

Also, the runtime is a JAR that gets downloaded by build system (Maven, Gradle, SBT, etc). It will keep reusing whatever version was originally downloaded so you may need to find out how to purge your local copy and redownload latest versions.

Look up how to do this on whatever build system, IDE, etc. you are using as instructions will vary. There is usually a documented way of handling.

e.g. Gradle will download JARs into $HOME/.gradle/caches. You might be able to use --refresh-dependencies to get new copies.

[markeastwood1]

I relied on edits to the pom.xml to be reflected in the project… and they are for a build but not for building the artifacts. I had to delete the InteliJ artifact that makes the jar I’m packaging to pick up the new versions. It was indeed using 4.31.1 and not 4.32 even though I’d edited the pom.xml. From: Michael Cho ***@***.***> Date: Wednesday, September 3, 2025 at 1:47 PM To: Homebrew/discussions ***@***.***> Cc: Mark Eastwood ***@***.***>, Author ***@***.***> Subject: [EXTERNAL] Re: [Homebrew/discussions] Homebrew - protobuf and protoc-gen-grpc-java (Discussion #6388) CAUTION: This email originated from outside the organization. Do not click links or open attachments unless you recognize the sender and know the content is safe. Also, the runtime is a JAR that gets downloaded by build system. It will keep reusing whatever version was originally downloaded so you may need to find out how to purge your local copy and redownload latest versions. Look up how to do this on whatever build system, IDE, etc. you are using as instructions will vary. — Reply to this email directly, view it on GitHub<#6388 (reply in thread)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/ACN7X6YKQWIJHHEBUBFBGGT3Q4ZVRAVCNFSM6AAAAACFQST3SGVHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTIMRZHEZTEMY>. You are receiving this because you authored the thread. This email and any files transmitted with it are confidential, proprietary and intended solely for the individual or entity to whom they are addressed. If you have received this email in error please delete it immediately.