Code Review 6934923: test/java/net/ipv6tests/TcpTest.java hangs on Solaris 10

[Alan Bateman]

Christopher Hegarty - Sun Microsystems Ireland wrote:
> Hi Alan, Michael,
>
> The test has a connected TCP socket and performs individual writes of 
> only 2 bytes on one end. It does not read off the data on the other 
> end. After 8 writes, on the 9th, the write blocks. Clearly the send 
> buffer has not been exhausted, but after some experimenting it can be 
> shown that you can only write more data if some is read off.
>
> This only occurs when both ends of the socket are on the same host. 
> This is a result of the Solaris TCP Fusion feature. See the bug 
> description for more details.
>
> The solution is to amend the test to have the producer and consumer on 
> separate threads. Also, cleaned up a few NPE I noticed when running 
> the test on various systems.
>
> Webrev:
>   http://cr.openjdk.java.net/~chegar/6934923/webrev.00/webrev/
>
> -Chris.
Looks okay to me.

-Alan