Unexpected exception from downstream (java.lang.reflect.UndeclaredThrowableException)

[danbim]

When trying to flash nodes using the "tr.experimentation-scripts" by calling:

wb-flash live.properties urn:wisebed:uzl1:,SOME_RESERVATION_ID_GOES_HERE App.bin

I get the following error message:

09:50:43,935 WARN  - Unexpected exception from downstream: [id: 0x01582e88, /0:0:0:0:0:0:0:0:50235 => wisebed.itm.uni-luebeck.de/141.83.68.89:8885] EXCEPTION: java.lang.reflect.UndeclaredThrowableException

Sometimes, this error message just shows up once, sometimes several times (I've seen 7 times).

This happens usually, if I'm connected with another script, which is listening to the output of the nodes (and sending to some or all of the nodes). I usually have to disconnect the listener and reset all nodes for this message to go away.