Created attachment 468304 [details] stacktrace of josm When starting josm it fails to connect to its servers with a java.io.IOException and suggests to change proxy settings (which obviosly doesn't help as I have a direct internet connection). This also happens when running josm with a fresh configuration. The error looks like an issue with TLS elliptic curve cryptography, but I have no further ideas about it. I'm using josm-10966 with icedtea-bin-3.3.0 and nss-3.30 In the attachments you find the terminal output of josm, including a stacktrace of the issue.
Created attachment 468306 [details] emerge --info nss josm icedtea-bin
Same problem here.
I have found the solution on the JOSM bug tracker: https://josm.openstreetmap.de/ticket/14482
I've solved the problem by emerging dev-java/icedtea:8 with USE="-sunec"
It works for me with dev-java/icedtea:8 with USE="sunec"
Does it work with >= icedtea-bin-3.3.0-r1?
Also, can you reproduce this issue with the latest unstable josm?
josm-10966 now works with icedtea-bin-3.4.0