Native Serial failure on Maveric

Question

Native Serial failure on Maveric

Closed this issue 11 years ago · 7 comments

I'm runinning a Mac OSX mavericks based system and have plugged in a USB to serial cable which I have connected to a board. I'm using your library to open the serial port which shows up as /dev/cu.usbserial-FTH0YJ3G. Opening the port fails with an exception
java.lang.UnsupportedClassVersionError: com/github/jodersky/flow/internal/NativeSerial : Unsupported major.minor version 51.0

I've uploaded my project on github

I'd really like to use your library so any help would be appreciated.

Answer 1 · 2014-05-21T19:27:27.000Z

That sounds like a java incompatibility issue. Could you post the results of "java -version"?

Answer 2 · 2014-05-21T20:45:26.000Z

This is what I get when i run it on the terminal
java version "1.6.0_65"
Java(TM) SE Runtime Environment (build 1.6.0_65-b14-462-11M4609)
Java HotSpot(TM) 64-Bit Server VM (build 20.65-b04-462, mixed mode)

Answer 3 · 2014-05-21T20:54:52.000Z

It seems you are using an older JDK (1.6) than the one flow's provided packages were compiled with (1.7). The simplest solution is to upgrade java to a more recent version.

If that's not an option, you can rebuild flow and publish it locally. In this case, rebuilding only the scala front-end should be sufficient, the backend can still be included through the fat jars available via maven.

Answer 4 · 2014-05-21T21:30:16.000Z

Thank you ... I'll try upgrading java to java 7 ...

Answer 5 · 2014-05-22T17:20:40.000Z

I haven't forgotten the issue.. I'll test it out over the weekend and close if it is successful.

Answer 6 · 2014-05-23T11:45:55.000Z

No worries, take the time you need

Answer 7 · 2014-06-06T21:50:03.000Z

It seems to me this is pretty clearly a java version mismatch. If you still have the problem feel free to open another issue.