RFR: 8237834: com/sun/jndi/ldap/LdapDnsProviderTest.java failing with LDAP response read timeout

[Aleks Efimov]

Hi,

LdapDnsProviderTest test expects to have no services running on 1111 
port on test machine. That could cause it to fail intermittently due to 
unexpected exception message thrown by LDAP client, i.e. timeout or 
disconnect instead of expected connection refusal.

The proposed fix tries to make test more stable ('intermittent' key was 
still added) by running test cases with non-default port multiple times 
by trying to use different random port numbers ('randomness' key was 
added) for each run.

Webrev: http://cr.openjdk.java.net/~aefimov/8237834/00/index.html

JBS: https://bugs.openjdk.java.net/browse/JDK-8237834

Test was not observed to fail for over 300 iterations.

With Best Regards,
Aleksei