java.util.ConcurrentModificationException
at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:909)
at java.util.ArrayList$Itr.next(ArrayList.java:859)
at com.pi4j.io.gpio.GpioProviderBase.dispatchPinDigitalStateChangeEvent(GpioProviderBase.java:354)
at com.pi4j.io.gpio.WiringPiGpioProviderBase.pinStateChange(WiringPiGpioProviderBase.java:290)
at com.pi4j.wiringpi.GpioInterrupt.pinStateChangeCallback(GpioInterrupt.java:128)
java.util.ConcurrentModificationException at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:909) at java.util.ArrayList$Itr.next(ArrayList.java:859) at com.pi4j.io.gpio.GpioProviderBase.dispatchPinDigitalStateChangeEvent(GpioProviderBase.java:354) at com.pi4j.io.gpio.WiringPiGpioProviderBase.pinStateChange(WiringPiGpioProviderBase.java:290) at com.pi4j.wiringpi.GpioInterrupt.pinStateChangeCallback(GpioInterrupt.java:128)