Intellij setup

[seonWKim]

How do you set up your intellij for testing apache pekko source code?

I've been trying out various settings but can't overcome the compilation error

[info] compiling 209 Scala sources and 28 Java sources to /Users/seonwoo960000/Desktop/project/pekko/actor/target/scala-2.13/classes ...
[error] /Users/seonwoo960000/Desktop/project/pekko/actor/src/main/java/org/apache/pekko/util/Unsafe.java:25:23: not found: value sun
[error]   public static final sun.misc.Unsafe instance;
[error]                       ^
[error] /Users/seonwoo960000/Desktop/project/pekko/actor/src/main/scala/org/apache/pekko/actor/LightArrayRevolverScheduler.scala:359:21: private val taskOffset in object LightArrayRevolverScheduler is never used
[error] Applicable -Wconf / @nowarn filters for this fatal warning: msg=<part of the message>, cat=unused-privates, site=org.apache.pekko.actor.LightArrayRevolverScheduler.taskOffset
[error]   private[this] val taskOffset =
[error]                     ^
[error] /Users/seonwoo960000/Desktop/project/pekko/actor/src/main/scala/org/apache/pekko/actor/RepointableActorRef.scala:50:29: Unused import
[error] Applicable -Wconf / @nowarn filters for this fatal warning: msg=<part of the message>, cat=unused-imports, site=org.apache.pekko.actor.RepointableActorRef
[error]   import AbstractActorRef.{ cellOffset, lookupOffset }
[error]                             ^
[error] /Users/seonwoo960000/Desktop/project/pekko/actor/src/main/scala/org/apache/pekko/actor/RepointableActorRef.scala:50:41: Unused import
[error] Applicable -Wconf / @nowarn filters for this fatal warning: msg=<part of the message>, cat=unused-imports, site=org.apache.pekko.actor.RepointableActorRef
[error]   import AbstractActorRef.{ cellOffset, lookupOffset }
[error]                                         ^
[error] /Users/seonwoo960000/Desktop/project/pekko/actor/src/main/scala/org/apache/pekko/actor/dungeon/Children.scala:88:11: local val added in method rec is never used
[error] Applicable -Wconf / @nowarn filters for this fatal warning: msg=<part of the message>, cat=unused-locals, site=org.apache.pekko.actor.dungeon.Children.addFunctionRef.rec.added
[error]       val added = old.updated(childPath.name, ref)
[error]           ^
[error] /Users/seonwoo960000/Desktop/project/pekko/actor/src/main/scala/org/apache/pekko/actor/dungeon/Children.scala:104:13: local val removed in method rec is never used
[error] Applicable -Wconf / @nowarn filters for this fatal warning: msg=<part of the message>, cat=unused-locals, site=org.apache.pekko.actor.dungeon.Children.removeFunctionRef.rec.removed
[error]         val removed = old - name
[error]             ^
[error] /Users/seonwoo960000/Desktop/project/pekko/actor/src/main/scala/org/apache/pekko/dispatch/AbstractDispatcher.scala:112:38: Unused import
[error] Applicable -Wconf / @nowarn filters for this fatal warning: msg=<part of the message>, cat=unused-imports, site=org.apache.pekko.dispatch.MessageDispatcher
[error]   import AbstractMessageDispatcher.{ inhabitantsOffset, shutdownScheduleOffset }
[error]                                      ^
[error] /Users/seonwoo960000/Desktop/project/pekko/actor/src/main/scala/org/apache/pekko/dispatch/AbstractDispatcher.scala:112:57: Unused import
[error] Applicable -Wconf / @nowarn filters for this fatal warning: msg=<part of the message>, cat=unused-imports, site=org.apache.pekko.dispatch.MessageDispatcher
[error]   import AbstractMessageDispatcher.{ inhabitantsOffset, shutdownScheduleOffset }
[error]                                                         ^
[error] /Users/seonwoo960000/Desktop/project/pekko/actor/src/main/scala/org/apache/pekko/pattern/AskSupport.scala:521:36: Unused import
[error] Applicable -Wconf / @nowarn filters for this fatal warning: msg=<part of the message>, cat=unused-imports, site=org.apache.pekko.pattern.PromiseActorRef
[error]   import AbstractPromiseActorRef.{ stateOffset, watchedByOffset }
[error]                                    ^
[error] /Users/seonwoo960000/Desktop/project/pekko/actor/src/main/scala/org/apache/pekko/pattern/AskSupport.scala:521:49: Unused import
[error] Applicable -Wconf / @nowarn filters for this fatal warning: msg=<part of the message>, cat=unused-imports, site=org.apache.pekko.pattern.PromiseActorRef
[error]   import AbstractPromiseActorRef.{ stateOffset, watchedByOffset }
[error]                                                 ^
[error] 10 errors found
[error] (actor / Compile / compileIncremental) Compilation failed
[error] Total time: 4 s, completed May 16, 2025, 12:25:19 PM

[He-Pin]

Try java 8, it works, I was encounter this problem too @seonWKim

[He-Pin]

Set the sbt to use java 8 and it will works, I'm not sure why too :(

[seonWKim]

Thanks it now works. The README.md recommend us to use 11 but for development, we should use 8 🤔

Here are my working intellij settings

[He-Pin]

that's ture, would you like to provide an update？

[seonWKim]

Sure, let me first read the CONTRIBUTiON.md

[seonWKim]

PR submitted.
https://github.com/apache/pekko/pull/1849/files