@Override
protected void run() throws Exception {
// cache some references on the stack, to make the code more JIT friendly
final OneInputStreamOperator<IN, OUT> operator = this.headOperator;
final StreamInputProcessor<IN> inputProcessor = this.inputProcessor;
final Object lock = getCheckpointLock();
while (running && inputProcessor.processInput(operator, lock)) {
checkTimerException();
}
}
