Hi Mark,

On 10/08/2019 21:14, mark sheppard wrote:
It is suggested that the use of wildcard address (INADDR_ANY) is a contributing factor, but i'm​
not sure that is a correct assumption.

That certainly did fix the intermittent failure we had in
the new httpclient tests - especially on solaris, back when we
were heavily hammering them prior to integration.

Just to emphasize the reuse address option is not on the IP address but rather on the IP address and port ​ combination, or at least that what is was meant to be. In the TCP context there are other restrictions, also.​

yes.
 ​
Your change is to the "server socket", but the client is a symmetric equivalent, DatagramSocket on​ wildcard and ephemeral port, so the echo send from the server could equally be sent astray!!​
That is, if the wildcard addressing is an issue.​

Oh - darn. Thanks for noticing this! I should change the client too.

Looking at the overall structure of the test, is it not possible, that the server socket has been​ GCed, finalized and so closed, prior to the server's packet send having been completed within the OS, and so the​
client hangs. ​

I doubt this would happen with UDP since the message should already
have been sent - but just in case I'm adding a countdown latch just
to eliminate the possibility.

Here is a new webrev:
webrev: http://cr.openjdk.java.net/~dfuchs/webrev_8229348/webrev.01/

best regards,

-- daniel

8229348: java/net/DatagramSocket/UnreferencedDatagramSockets.java
           fails intermittently
https://bugs.openjdk.java.net/browse/JDK-8229348

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