Hi Stefan, thanks for the answer and the advise, which I've already seen in another email.
Anyway, I played around with the taskmanager.numberOfTaskSlots and taskmanager.memory.fraction options. I noticed that decreasing the former and increasing the latter lead to longer execution and more processed data before the failure. The error messages and exceptions from an affected TaskManager are here [1]. Unfortunately, I cannot find a java.lang.OutOfMemoryError in here. Do you have another idea or something to try? Thanks in advance, Sebastian [1] http://paste.gehaxelt.in/?e669fabc1d4c15be#G1Ioq/ASwGUdCaK2rQ1AY3ZmCkA7LN4xVOHvM9NeI2g=
