Daniel Bali created FLINK-1594:
----------------------------------
Summary: DataStreams don't support self-join
Key: FLINK-1594
URL: https://issues.apache.org/jira/browse/FLINK-1594
Project: Flink
Issue Type: Bug
Components: Streaming
Affects Versions: 0.9
Environment: flink-0.9.0-SNAPSHOT
Reporter: Daniel Bali
Trying to join a DataSets with itself will result in exceptions. I get the
following stack trace:
{noformat}
java.lang.Exception: Error setting up runtime environment: Union buffer
reader must be initialized with at least two individual buffer readers
at
org.apache.flink.runtime.execution.RuntimeEnvironment.<init>(RuntimeEnvironment.java:173)
at
org.apache.flink.runtime.taskmanager.TaskManager.org$apache$flink$runtime$taskmanager$TaskManager$$submitTask(TaskManager.scala:419)
at
org.apache.flink.runtime.taskmanager.TaskManager$$anonfun$receiveWithLogMessages$1.applyOrElse(TaskManager.scala:261)
at
scala.runtime.AbstractPartialFunction$mcVL$sp.apply$mcVL$sp(AbstractPartialFunction.scala:33)
at
scala.runtime.AbstractPartialFunction$mcVL$sp.apply(AbstractPartialFunction.scala:33)
at
scala.runtime.AbstractPartialFunction$mcVL$sp.apply(AbstractPartialFunction.scala:25)
at
org.apache.flink.runtime.ActorLogMessages$$anon$1.apply(ActorLogMessages.scala:44)
at
org.apache.flink.runtime.ActorLogMessages$$anon$1.apply(ActorLogMessages.scala:30)
at scala.PartialFunction$class.applyOrElse(PartialFunction.scala:118)
at
org.apache.flink.runtime.ActorLogMessages$$anon$1.applyOrElse(ActorLogMessages.scala:30)
at akka.actor.Actor$class.aroundReceive(Actor.scala:465)
at
org.apache.flink.runtime.taskmanager.TaskManager.aroundReceive(TaskManager.scala:89)
at akka.actor.ActorCell.receiveMessage(ActorCell.scala:516)
at akka.actor.ActorCell.invoke(ActorCell.scala:487)
at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:254)
at akka.dispatch.Mailbox.run(Mailbox.scala:221)
at akka.dispatch.Mailbox.exec(Mailbox.scala:231)
at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
at
scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)
at
scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
at
scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)
Caused by: java.lang.IllegalArgumentException: Union buffer reader must be
initialized with at least two individual buffer readers
at
org.apache.flink.shaded.com.google.common.base.Preconditions.checkArgument(Preconditions.java:125)
at
org.apache.flink.runtime.io.network.api.reader.UnionBufferReader.<init>(UnionBufferReader.java:69)
at
org.apache.flink.streaming.api.streamvertex.CoStreamVertex.setConfigInputs(CoStreamVertex.java:101)
at
org.apache.flink.streaming.api.streamvertex.CoStreamVertex.setInputsOutputs(CoStreamVertex.java:63)
at
org.apache.flink.streaming.api.streamvertex.StreamVertex.registerInputOutput(StreamVertex.java:65)
at
org.apache.flink.runtime.execution.RuntimeEnvironment.<init>(RuntimeEnvironment.java:170)
... 20 more
{noformat}
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