Exception - Invalid buffer size: 0

[verbit]

Imagine the following job graph with an applied constraint:

input.connectTo(task1);
input.connectTo(task2);
task1.connectTo(task3);
task2.connectTo(task3);
task3.connectTo(output1);

ConstraintUtil.defineAllLatencyConstraintsBetween(input, output, 100);

where input creates random data and task1, task2, task3 pass the data through to the output.

Whenever input terminates (regularly) task1 throws the following exception:

ERROR eu.stratosphere.nephele.taskmanager.bytebuffered.IncomingConnection  - java.io.IOException: Invalid buffer size: 0
    at eu.stratosphere.nephele.taskmanager.transferenvelope.AbstractDeserializer.readBuffer(AbstractDeserializer.java:298)
    at eu.stratosphere.nephele.taskmanager.transferenvelope.AbstractDeserializer.read(AbstractDeserializer.java:97)
    at eu.stratosphere.nephele.taskmanager.bytebuffered.IncomingConnection.read(IncomingConnection.java:91)
    at eu.stratosphere.nephele.taskmanager.bytebuffered.IncomingConnectionThread.doRead(IncomingConnectionThread.java:187)
    at eu.stratosphere.nephele.taskmanager.bytebuffered.IncomingConnectionThread.run(IncomingConnectionThread.java:126)