UnixServer example doesn't work on Mac with either nc or socat

I’m trying to make a server using the UnixServer example as a starting point. On my Mac, when I send more than two buffers worth to it, it just hangs and no longer reads more data. Here are two example commands that should work (and do work on Linux).

➜ ~ cat .emacs | socat UNIX-CONNECT:/tmp/fubar.sock - ➜ ~ cat .emacs | nc -U /tmp/fubar.sock

All I’m doing is running the UnixServer class straight out of the box. I’m using version jnr-unixsocket 0.28.

The funny thing is that if I make the ByteBuffer smaller than 1024 (like 512), it hangs after just 1 buffer read. All buffer sizes work fine on Linux.

[headius]

With the UnixServer working properly now on Darwin, I’m going to close this issue.

From discussions and articles online, it appears this may be just one of the “quirks” of using poll across platforms. It does not appear that additional POLL_IN events get triggered for unread data that happens to be lying around in a kernel buffer, so code that responds to a READ select should attempt to read as much data as is available before doing another select.

[headius]

Releasing today in 0.29.