Re: javac server: No port file values materialized. on AIX

[David Holmes]

On 18/01/2016 3:08 AM, Andreas Lundblad wrote:
On Fri, Jan 15, 2016 at 10:59:08AM +0100, Volker Simonis wrote:
Maybe the timeout of five seconds is too small?
Our AIX boxes are not the fastest and we also have a lot of stuff on NFS shares.

I recently saw this one:

[CLIENT] Exception caught: java.io.IOException: No port file values
materialized. Giving up after 6676 ms

Normally the timeout should be just about a little more than 5 seconds
but here the exception reports more than 6 seconds which might be a
hint that the machine was severely overloaded.

Regards,
Volker

Interesting observation. The code for waiting for valid port file values 
basically looks like

     for (int i = 0; i < 10; i++) {
         checkPortFile();
         if (successful)
             break;
         sleep(500);
     }

so the fact that it even reaches 6676 ms looks suspicious when it comes to load.

Why? Under load those sleep(500)'s might not return for much longer; and 
the whole things might be time preempted at any point for an extended 
period of time.

David
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-- Andreas