Hello Akka-team,
I ran into a problem this morning using akka-stream_2.10.0.7 with Scala
version 2.10.3.
When I try to receive multiple files at a time, some randoms exception are
thrown within the classloader. After two successive tries, everything is
fine.
I attached one of the stacktrace. The relevent part seems to be this
java.lang.RuntimeException: error reading Scala signature of
scalax.collection.GraphBase: value collection is not a package
at scala.reflect.internal.pickling.UnPickler.unpickle(UnPickler.scala:45)
at
scala.reflect.runtime.JavaMirrors$JavaMirror.unpickleClass(JavaMirrors.scala:565)
...
at scalax.collection.GraphLike$$typecreator1$1.apply(Graph.scala:44)
...
at
akka.stream.scaladsl2.FlowGraphBuilder.checkPartialBuildPreconditions(FlowGraph.scala:486)
at akka.stream.scaladsl2.FlowGraphBuilder.build(FlowGraph.scala:468)
...
at akka.stream.scaladsl2.FlowGraph$.apply(FlowGraph.scala:548)
We also ran into this thread in Scala. That seems to be linked.
https://issues.scala-lang.org/browse/SI-6240
Are you aware of this problem? Does further version of akka-stream would
fix this in Scala.2.10 ?
Thanks for your help
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java.lang.RuntimeException: error reading Scala signature of
scalax.collection.GraphBase: value collection is not a package
at
scala.reflect.internal.pickling.UnPickler.unpickle(UnPickler.scala:45)
at
scala.reflect.runtime.JavaMirrors$JavaMirror.unpickleClass(JavaMirrors.scala:565)
at
scala.reflect.runtime.SymbolLoaders$TopClassCompleter.complete(SymbolLoaders.scala:32)
at scala.reflect.internal.Symbols$Symbol.info(Symbols.scala:1231)
at
scala.reflect.internal.pickling.UnPickler$Scan.scala$reflect$internal$pickling$UnPickler$Scan$$fromName$1(UnPickler.scala:207)
at
scala.reflect.internal.pickling.UnPickler$Scan.readExtSymbol$1(UnPickler.scala:226)
at
scala.reflect.internal.pickling.UnPickler$Scan.readSymbol(UnPickler.scala:250)
at
scala.reflect.internal.pickling.UnPickler$Scan.readSymbolRef(UnPickler.scala:783)
at
scala.reflect.internal.pickling.UnPickler$Scan.readType(UnPickler.scala:346)
at
scala.reflect.internal.pickling.UnPickler$Scan$$anonfun$readTypeRef$1.apply(UnPickler.scala:792)
at
scala.reflect.internal.pickling.UnPickler$Scan$$anonfun$readTypeRef$1.apply(UnPickler.scala:792)
at
scala.reflect.internal.pickling.UnPickler$Scan.at(UnPickler.scala:171)
at
scala.reflect.internal.pickling.UnPickler$Scan.readTypeRef(UnPickler.scala:792)
at
scala.reflect.internal.pickling.UnPickler$Scan$$anonfun$4.apply(UnPickler.scala:347)
at
scala.reflect.internal.pickling.UnPickler$Scan$$anonfun$4.apply(UnPickler.scala:347)
at
scala.reflect.internal.pickling.PickleBuffer.until(PickleBuffer.scala:163)
at
scala.reflect.internal.pickling.UnPickler$Scan.readType(UnPickler.scala:347)
at
scala.reflect.internal.pickling.UnPickler$Scan$$anonfun$readTypeRef$1.apply(UnPickler.scala:792)
at
scala.reflect.internal.pickling.UnPickler$Scan$$anonfun$readTypeRef$1.apply(UnPickler.scala:792)
at
scala.reflect.internal.pickling.UnPickler$Scan.at(UnPickler.scala:171)
at
scala.reflect.internal.pickling.UnPickler$Scan.readTypeRef(UnPickler.scala:792)
at
scala.reflect.internal.pickling.UnPickler$Scan.readType(UnPickler.scala:358)
at
scala.reflect.internal.pickling.UnPickler$Scan$LazyTypeRef$$anonfun$34.apply(UnPickler.scala:855)
at
scala.reflect.internal.pickling.UnPickler$Scan$LazyTypeRef$$anonfun$34.apply(UnPickler.scala:855)
at
scala.reflect.internal.pickling.UnPickler$Scan.at(UnPickler.scala:171)
at
scala.reflect.internal.pickling.UnPickler$Scan$LazyTypeRef.complete(UnPickler.scala:855)
at scala.reflect.internal.Symbols$Symbol.info(Symbols.scala:1231)
at scala.reflect.internal.Symbols$Symbol.initialize(Symbols.scala:1374)
at scala.reflect.internal.Symbols$Symbol.annotations(Symbols.scala:1581)
at
scala.reflect.internal.Symbols$Symbol.addAnnotation(Symbols.scala:1600)
at
scala.reflect.internal.pickling.UnPickler$Scan.readSymbolAnnotation(UnPickler.scala:491)
at
scala.reflect.internal.pickling.UnPickler$Scan.run(UnPickler.scala:88)
at
scala.reflect.internal.pickling.UnPickler.unpickle(UnPickler.scala:37)
at
scala.reflect.runtime.JavaMirrors$JavaMirror.unpickleClass(JavaMirrors.scala:565)
at
scala.reflect.runtime.SymbolLoaders$TopClassCompleter.complete(SymbolLoaders.scala:32)
at scala.reflect.internal.Symbols$Symbol.info(Symbols.scala:1231)
at
scala.reflect.internal.BuildUtils$BuildImpl.select(BuildUtils.scala:20)
at
scala.reflect.internal.BuildUtils$BuildImpl.selectTerm(BuildUtils.scala:14)
at
scala.reflect.internal.BuildUtils$BuildImpl.selectTerm(BuildUtils.scala:8)
at scalax.collection.GraphLike$$typecreator1$1.apply(Graph.scala:44)
at
scala.reflect.api.TypeTags$WeakTypeTagImpl.tpe$lzycompute(TypeTags.scala:231)
at scala.reflect.api.TypeTags$WeakTypeTagImpl.tpe(TypeTags.scala:231)
at scala.reflect.api.TypeTags$class.typeOf(TypeTags.scala:335)
at scala.reflect.api.Universe.typeOf(Universe.scala:59)
at scalax.collection.GraphLike$class.isDirected(Graph.scala:44)
at
scalax.collection.mutable.DefaultGraphImpl.isDirected$lzycompute(Graph.scala:264)
at
scalax.collection.mutable.DefaultGraphImpl.isDirected(Graph.scala:264)
at
scalax.collection.TraverserImpl$Impl$Runner$$anonfun$dfsWGB$1.apply(TraverserImpl.scala:457)
at
scalax.collection.TraverserImpl$Impl$Runner$$anonfun$dfsWGB$1.apply(TraverserImpl.scala:448)
at scalax.collection.State$class.withHandles(State.scala:98)
at
scalax.collection.mutable.DefaultGraphImpl.withHandles(Graph.scala:264)
at
scalax.collection.TraverserImpl$Impl$Runner.dfsWGB(TraverserImpl.scala:448)
at
scalax.collection.GraphTraversalImpl$ComponentTraverser$$anonfun$findCycle$1$$anonfun$apply$12.apply(GraphTraversalImpl.scala:234)
at
scalax.collection.GraphTraversalImpl$ComponentTraverser$$anonfun$findCycle$1$$anonfun$apply$12.apply(GraphTraversalImpl.scala:232)
at
scala.collection.TraversableLike$WithFilter$$anonfun$foreach$1.apply(TraversableLike.scala:772)
at scala.collection.Iterator$class.foreach(Iterator.scala:727)
at scala.collection.AbstractIterator.foreach(Iterator.scala:1157)
at scala.collection.IterableLike$class.foreach(IterableLike.scala:72)
at
scalax.collection.mutable.AdjacencyListGraph$NodeSet.foreach(AdjacencyListGraph.scala:75)
at
scala.collection.TraversableLike$WithFilter.foreach(TraversableLike.scala:771)
at
scalax.collection.GraphTraversalImpl$ComponentTraverser$$anonfun$findCycle$1.apply(GraphTraversalImpl.scala:232)
at
scalax.collection.GraphTraversalImpl$ComponentTraverser$$anonfun$findCycle$1.apply(GraphTraversalImpl.scala:230)
at scalax.collection.State$class.withHandles(State.scala:98)
at
scalax.collection.mutable.DefaultGraphImpl.withHandles(Graph.scala:264)
at
scalax.collection.GraphTraversalImpl$ComponentTraverser.findCycle(GraphTraversalImpl.scala:230)
at
scalax.collection.GraphTraversal$class.findCycle(GraphTraversal.scala:94)
at scalax.collection.mutable.DefaultGraphImpl.findCycle(Graph.scala:264)
at
akka.stream.scaladsl2.FlowGraphBuilder.checkPartialBuildPreconditions(FlowGraph.scala:486)
at akka.stream.scaladsl2.FlowGraphBuilder.build(FlowGraph.scala:468)
at akka.stream.scaladsl2.FlowGraph$.apply(FlowGraph.scala:568)
at akka.stream.scaladsl2.FlowGraph$.apply(FlowGraph.scala:548)
