Illegal State in Bulk Iteration

Posted by Maximilian Alber on
URL: http://deprecated-apache-flink-user-mailing-list-archive.369.s1.nabble.com/Illegal-State-in-Bulk-Iteration-tp492.html

Hi Flinksters!

I try to write a BulkIteration. Somehow I get a cryptic error message, at least I have no clue what's wrong:

Code:

var width = env.fromCollection[Vector](Seq(Vector.ones(config.dimensions) * config.startWidth)) map {x => new Vector(0, x.values)}
var update = env.fromCollection[Vector](Seq(Vector.ones(config.dimensions) * 0.01F)) map {x => new Vector(1, x.values)}
var lastGradient = env.fromCollection[Vector](Seq(Vector.zeros(config.dimensions))) map {x => new Vector(2, x.values)}

var stepSet = width union update union lastGradient
stepSet = stepSet.iterate(config.gradientDescentIterations){
    stepSet =>
    var width = stepSet filter {_.id == 0}
    var update = stepSet filter {_.id == 1}
    var lastGradient = stepSet filter {_.id == 2}

    val gradient = getGradient(X, residual, center, width)
    val term = gradient * lastGradient
    lastGradient = gradient

    update = update.map(new RichMapFunction[Vector, Vector]{
      var term: Vector = null
      val minWidthUpdate = 0.00000001F
      val maxWidthUpdate = 10.0F
      override def open(config: Configuration) = {
       term = getRuntimeContext.getBroadcastVariable("term").toList.head
    }

    def map(x: Vector) = {x.condMul(term.isLess(0), 0.5F).condMul(term.isGreater(0), 1.2F).clip(minWidthUpdate, maxWidthUpdate)}
    }).withBroadcastSet(term, "term")
    /*
    width = width.map(new RichMapFunction[Vector, Vector]{
      var update: Vector = null
      var gradient: Vector = null
      override def open(config: Configuration) = {
        update = getRuntimeContext.getBroadcastVariable("update").toList.head
       gradient = getRuntimeContext.getBroadcastVariable("gradient").toList.head
     }

    def map(x: Vector) = {(x + update * (gradient sign)).clip(config.minWidth, config.maxWidth)}
    }).withBroadcastSet(update, "update")withBroadcastSet(gradient, "gradient")
    */

    width union update union lastGradient
}

Error:

java.lang.IllegalStateException
at org.apache.flink.compiler.dag.BulkPartialSolutionNode.setCandidateProperties(BulkPartialSolutionNode.java:50)
at org.apache.flink.compiler.dag.BulkIterationNode.instantiateCandidate(BulkIterationNode.java:292)
at org.apache.flink.compiler.dag.SingleInputNode.addLocalCandidates(SingleInputNode.java:367)
at org.apache.flink.compiler.dag.SingleInputNode.getAlternativePlans(SingleInputNode.java:315)
at org.apache.flink.compiler.dag.SingleInputNode.getAlternativePlans(SingleInputNode.java:258)
at org.apache.flink.compiler.dag.SingleInputNode.getAlternativePlans(SingleInputNode.java:258)
at org.apache.flink.compiler.dag.SingleInputNode.getAlternativePlans(SingleInputNode.java:258)
at org.apache.flink.compiler.dag.BinaryUnionNode.getAlternativePlans(BinaryUnionNode.java:105)
at org.apache.flink.compiler.dag.BinaryUnionNode.getAlternativePlans(BinaryUnionNode.java:104)
at org.apache.flink.compiler.dag.SingleInputNode.getAlternativePlans(SingleInputNode.java:258)
at org.apache.flink.compiler.dag.DataSinkNode.getAlternativePlans(DataSinkNode.java:194)
at org.apache.flink.compiler.PactCompiler.compile(PactCompiler.java:561)
at org.apache.flink.compiler.PactCompiler.compile(PactCompiler.java:466)
at org.apache.flink.client.program.Client.getOptimizedPlan(Client.java:197)
at org.apache.flink.client.program.Client.getOptimizedPlan(Client.java:210)
at org.apache.flink.client.program.Client.run(Client.java:288)
at org.apache.flink.client.program.Client.run(Client.java:231)
at org.apache.flink.client.CliFrontend.executeProgram(CliFrontend.java:347)
at org.apache.flink.client.CliFrontend.run(CliFrontend.java:334)
at org.apache.flink.client.CliFrontend.parseParameters(CliFrontend.java:1001)
at org.apache.flink.client.CliFrontend.main(CliFrontend.java:1025)

Thanks!

Cheers,

Max