Why do you think it is Java’s fault? I do not think so since your error description sounds like a high level fault. ;-) Does JOSM display some error message? You may try to run josm from a command line to see java’s error messages.
We have the same problem! JOSM seems to believe that the ‘shift’ key is down, and stops drawing lines. I haven’t found the root cause, and it magically started working again for me.
I think it’s Java’s fault since I’ve heard someone else mention it happening on their Mac, and presumably not on their Windows box. I don’t recall seeing any errors appear in Terminal when this happens.
Discussion
Beachd le aseerel4c26 17 An t-Samhain 2012 aig 15:25
Why do you think it is Java’s fault? I do not think so since your error description sounds like a high level fault. ;-) Does JOSM display some error message? You may try to run josm from a command line to see java’s error messages.
Beachd le Stereo 19 An t-Samhain 2012 aig 09:44
We have the same problem! JOSM seems to believe that the ‘shift’ key is down, and stops drawing lines. I haven’t found the root cause, and it magically started working again for me.
Beachd le Dion Dock 20 An t-Samhain 2012 aig 05:29
I think it’s Java’s fault since I’ve heard someone else mention it happening on their Mac, and presumably not on their Windows box. I don’t recall seeing any errors appear in Terminal when this happens.
Beachd le Stereo 1 Am Faoilleach 2013 aig 22:01
Dion Dock, are you running Bartender? There seems to be a conflict between the two; the JOSM issue goes away if I quit Bartender.
You might also be interested in this ticket: http://josm.openstreetmap.de/ticket/4892