He-Pin opened a new issue, #1653:
URL: https://github.com/apache/pekko/issues/1653
The cause is :
```scala
override def spliterator(): util.Spliterator[Unit] = ???
```
```scala
[ERROR] [12/31/2024 20:11:02.525]
[StreamConvertersSpec-pekko.actor.default-dispatcher-6]
[pekko://StreamConvertersSpec/system/Materializers/StreamSupervisor-0/flow-0-0-ignoreSink]
Error during preStart in
[org.apache.pekko.stream.impl.JavaStreamSource$$anon$1-fromJavaStream]: an
implementation is missing
scala.NotImplementedError: an implementation is missing
at scala.Predef$.$qmark$qmark$qmark(Predef.scala:344)
at
org.apache.pekko.stream.scaladsl.StreamConvertersSpec$EmptyStream$1.spliterator(StreamConvertersSpec.scala:114)
at
org.apache.pekko.stream.impl.JavaStreamSource$$anon$1.preStart(JavaStreamSource.scala:39)
at
org.apache.pekko.stream.impl.fusing.GraphInterpreter.init(GraphInterpreter.scala:317)
at
org.apache.pekko.stream.impl.fusing.GraphInterpreterShell.init(ActorGraphInterpreter.scala:631)
at
org.apache.pekko.stream.impl.fusing.ActorGraphInterpreter.tryInit(ActorGraphInterpreter.scala:740)
at
org.apache.pekko.stream.impl.fusing.ActorGraphInterpreter.preStart(ActorGraphInterpreter.scala:789)
at org.apache.pekko.actor.Actor.aroundPreStart(Actor.scala:558)
at org.apache.pekko.actor.Actor.aroundPreStart$(Actor.scala:558)
at
org.apache.pekko.stream.impl.fusing.ActorGraphInterpreter.aroundPreStart(ActorGraphInterpreter.scala:729)
at org.apache.pekko.actor.ActorCell.create(ActorCell.scala:653)
at org.apache.pekko.actor.ActorCell.invokeAll$1(ActorCell.scala:523)
at org.apache.pekko.actor.ActorCell.systemInvoke(ActorCell.scala:545)
at
org.apache.pekko.dispatch.Mailbox.processAllSystemMessages(Mailbox.scala:297)
at org.apache.pekko.dispatch.Mailbox.run(Mailbox.scala:232)
at org.apache.pekko.dispatch.Mailbox.exec(Mailbox.scala:245)
at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:289)
at
java.util.concurrent.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1056)
at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1692)
at
java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:175)
```
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