[DIRMINA-790] 2.0.0M6 + 2.0.0RC1: Win7 performance issue

• Type: Bug
• Status: Closed
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 2.0.0-RC1
• Fix Version/s: 2.0.2
• Environment: WinXP SP3 with disabled Firewall + Virusscanner, Win7 64bit with disabled Virusscanner and Firewall, Win7 32bit with absolutely no virusscanner and with disabled firewall, all Systems with 32bit JRE6U20; Ubuntu Linux 64bit mit JRE6U20 64bit
• Assignee: Emmanuel Lécharny
• Reporter: Alex C.
• Created: 16/Jun/10 14:04
• Updated: 08/Feb/11 11:03
• Resolved: 30/Nov/10 00:15

Description

Hi there,

I've written a kind of RMI replacement uses MINA for network communication layer that is also able to transfer files very fast (without reflection and complex serialisation stuff). One of my customers faced a performance problem as soon as the receiving application part is running in Win7.

I tried to create an reproducer:
First I wrote a small test application using Java IO that simply transfers 1.000.000 bytes of random data from a client to a server. That's very fast. It doesn't matter if I try on localhost, or from WinXP->Win7 oder Win7->WinXP. Even Linux->Win7 is fast.

Then I wrote the same kind of application with mina. No additional codec, nothing complex. I just transfer 100 IoBuffers with 10.000 bytes each from A to B.
If I run the application on WinXP via localhost, it's very fast. <1sec runtime.

If I run client and server in Win7, it's f*cking slow. Takes >1min to complete.

Please find attached the test application.
Just extract and run:

java -cp MINASocketTransfer.jar;./lib/* minasockettransfer.Client <IP or Hostname of Server>
java -cp MINASocketTransfer.jar;./lib/* minasockettransfer.Server

The lib folder contains 2.0.0M6 and 2.0.0RC1. To switch from the one to the other version, simple "move" the tailing "_" to exclude the specified lib from classpath.
Java-Source files are included in the MINASocketTransfer.jar ...

I tested it with 2.0.0M6 and 2.0.0RC1. It's reproducible with both versions.