Will not compile

[max8github]

Getting a compilation error. Tried multiple versions of scala, sbt, but always getting the protobuf error below:

akka-typed-blog (master) 👉 sbt run
[warn] Executing in batch mode.
[warn]   For better performance, hit [ENTER] to switch to interactive mode, or
[warn]   consider launching sbt without any commands, or explicitly passing 'shell'
[info] Loading global plugins from /Users/me/.sbt/0.13/plugins
[info] Updating {file:/Users/me/.sbt/0.13/plugins/}global-plugins...
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by sbt.ivyint.ErrorMessageAuthenticator$ (file:/Users/me/.sbt/boot/scala-2.10.6/org.scala-sbt/sbt/0.13.15/ivy-0.13.15.jar) to field java.net.Authenticator.theAuthenticator
WARNING: Please consider reporting this to the maintainers of sbt.ivyint.ErrorMessageAuthenticator$
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
[info] Resolving org.fusesource.jansi#jansi;1.4 ...
[info] Done updating.
error: error while loading String, class file '/Users/me/.sbt/0.13/java9-rt-ext-oracle_corporation_12_0_1/rt.jar(java/lang/String.class)' is broken
(class java.lang.NullPointerException/null)
[info] Loading project definition from /Users/me/code/tutorials/myfly/myass/akka-typed-blog/project
[info] Updating {file:/Users/me/code/tutorials/myfly/myass/akka-typed-blog/project/}akka-typed-blog-build...
[info] Resolving org.fusesource.jansi#jansi;1.4 ...
[info] Done updating.
error: error while loading String, class file '/Users/me/.sbt/0.13/java9-rt-ext-oracle_corporation_12_0_1/rt.jar(java/lang/String.class)' is broken
(class java.lang.NullPointerException/null)
[info] Set current project to akka-typed-blog (in build file:/Users/me/code/tutorials/myfly/myass/akka-typed-blog/)
[info] Updating {file:/Users/me/code/tutorials/myfly/myass/akka-typed-blog/}akka-typed-blog...
[info] Resolving jline#jline;2.14.4 ...
[info] Done updating.
[info] Compiling 1 protobuf files to /Users/me/code/tutorials/myfly/myass/akka-typed-blog/target/scala-2.12/src_managed/main/compiled_protobuf
[info] Compiling schema /Users/me/code/tutorials/myfly/myass/akka-typed-blog/src/main/protobuf/BlogPostMessages.proto
[error] [libprotobuf WARNING google/protobuf/compiler/parser.cc:646] No syntax specified for the proto file: BlogPostMessages.proto. Please use 'syntax = "proto2";' or 'syntax = "proto3";' to specify a syntax version. (Defaulted to proto2 syntax.)
[info] Compiling protobuf
[info] Protoc target directory: /Users/me/code/tutorials/myfly/myass/akka-typed-blog/target/scala-2.12/src_managed/main/compiled_protobuf
[info] Compiling 35 Scala sources and 28 Java sources to /Users/me/code/tutorials/myfly/myass/akka-typed-blog/target/scala-2.12/classes...
[info] 'compiler-interface' not yet compiled for Scala 2.12.3. Compiling...

[patriknw]

Those blog posts are pretty old by now. I'd recommend that you look at the latest Akka documentation instead. Starting points for Akka Typed:

• https://akka.io/try-akka/
• https://doc.akka.io/docs/akka/current/typed/guide/index.html
• https://doc.akka.io/docs/akka/current/typed/actors.html

[max8github]

Thanks. I did, but was really looking forward to getting running akka typed code with akka-persistence and clustering (and fsm, which, as i read, is "built-in" as opposed to untyped)...
Any other codebase you would be aware of?
Else, will try on my own...

[patriknw]

It’s all in the docs

• https://doc.akka.io/docs/akka/current/typed/cluster.html
• https://doc.akka.io/docs/akka/current/typed/persistence.html
• https://doc.akka.io/docs/akka/current/typed/fsm.html

at the end of those pages you also find links to example projects for the specific topics