For example the following code will lead to OOM with JDK8b82-lambda:

import java.util.stream.Streams;

public class SequentialOnParallelStream {
    public static void main(String[] args) {
        Streams.generate(() -> "abc").parallel().sequential().iterator().hasNext();
    }
}


Exception in thread "main" java.lang.OutOfMemoryError: Java heap space
at java.util.stream.SpinedBuffer.ensureCapacity(SpinedBuffer.java:137)
at java.util.stream.SpinedBuffer.increaseCapacity(SpinedBuffer.java:146)
at java.util.stream.SpinedBuffer.accept(SpinedBuffer.java:238)
at java.util.stream.Nodes$SpinedNodeBuilder.accept(Nodes.java:1206)
at java.util.Spliterators$IteratorSpliterator.forEach(Spliterators.java:1008)
at java.util.stream.AbstractPipeline$PipelineHelperImpl.intoWrapped(AbstractPipeline.java:599)
at java.util.stream.AbstractPipeline$PipelineHelperImpl.into(AbstractPipeline.java:589)
at java.util.stream.NodeUtils$CollectorTask.doLeaf(NodeUtils.java:325)
at java.util.stream.NodeUtils$CollectorTask.doLeaf(NodeUtils.java:303)
at java.util.stream.AbstractTask.doCompute(AbstractTask.java:283)
at java.util.stream.AbstractTask.compute(AbstractTask.java:256)
at java.util.concurrent.CountedCompleter.exec(CountedCompleter.java:710)
at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:260)
at java.util.concurrent.ForkJoinTask.doInvoke(ForkJoinTask.java:356)
at java.util.concurrent.ForkJoinTask.invoke(ForkJoinTask.java:688)
at java.util.stream.NodeUtils.collect(NodeUtils.java:78)
at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:87)
at java.util.stream.AbstractPipeline$PipelineHelperImpl.collectOutput(AbstractPipeline.java:684)
at java.util.stream.AbstractPipeline$3.evaluateParallel(AbstractPipeline.java:318)
at java.util.stream.AbstractPipeline$1.getNode(AbstractPipeline.java:189)
at java.util.stream.AbstractPipeline$NodeSpliteratorSupplier.get(AbstractPipeline.java:522)
at java.util.stream.AbstractPipeline$UpstreamSpliteratorSupplier.get(AbstractPipeline.java:510)
at java.util.stream.AbstractPipeline$UpstreamSpliteratorSupplier.get(AbstractPipeline.java:503)
at java.util.stream.StreamSpliterators$DelegatingSpliterator.get(StreamSpliterators.java:355)
at java.util.stream.StreamSpliterators$DelegatingSpliterator.tryAdvance(StreamSpliterators.java:367)
at java.util.Spliterators$1Adapter.hasNext(Spliterators.java:394)
at SequentialOnParallelStream.main(SequentialOnParallelStream.java:5)