support lz4 files when running UI

[pjfanning]

I have tried a few combinations when starting the UI

docker run -v /path/to/logs/dir:/logs -p 23763:23763 roboxue/sparklint -d /logs && open localhost:23763

But if I have .lz4 files in the directory, they are not picked up as sources.
I notice there is some code in sparklint that uses the lz4 codec.

[roboxue]

I've been noticing this for a while. The spark's lz4 format cannot easily unpacked by lz4 unpacker. I'm using this line in my testing new LZ4BlockInputStream(getClass.getClassLoader.getResourceAsStream("application_xxxxxxxx.lz4")), which works fine with standalone log files. I'll try to update the public branch this weekend. Thanks for reporting

[pjfanning]

Thanks @roboxue - I'm doing something similar with my lz4 logs. It's a nice-to-have feature to let the UI read lz4 files directly but Sparklint is very useful regardless.