[xSocket-develop] Silent 'Out of Memory' Exception cause clients to miss data (server's onData method never completes properly)

[Anri D. <anr...@gm...>]

Hi,

I wrote a simple test starting a server and connecting 10
NonBlockingConnection clients.
Each client connects and sends a string to the server, and then waits
for an echo before it disconnects.

The server's onData() handler method does some "heavy" processing, and
then sleeps randomly for 1-1000 ms, before sending the echo to the
client.
This is done to simulate server-side processing, which takes does take
time when disk I/O (db calls etc) is taken into the picture.

The test kept failing for no apparent reason with some of the 10
clients never receiving their echo.

Running the exact same test using Apache Mina produced a 'Out of
Memory' Exception.

Increasing the JVM memory to a max of 256 mb (using the java args
-Xms40m -Xmx256m) immediately solved the issue, for both Mina AND
xSocket.

The strange thing is that xSocket didn't throw any exceptions, or
simply swallowed them up without logging anything (default logging
settings).

Perhaps this should be made more obvious in the tutorial ?

I've included my test in this email (uses JUnit 4.5 and SLF4J)

Cheers,
- Anri