RFR: 8221303: sun/management/jmxremote/bootstrap/JMXInterfaceBindingTest.java fails due to java.rmi.server.ExportException: Port already in use

[Daniil Titov]

Hi Chris and Alex,

Please review a new version of the fix that moves the diagnostic output for the test failure to run() 
method after the number of retry attempts is exceeded. It also includes other corrections that
you suggested.

Thanks!

Webrev: http://cr.openjdk.java.net/~dtitov/8221303/webrev.02/ 
Bug: https://bugs.openjdk.java.net/browse/JDK-8221303

--Best regards,
Daniil


On 7/17/19, 1:47 PM, "Chris Plummer" <chris.plummer at oracle.com> wrote:

    Hi Daniil,
    
    I think you can remove "Ok" from the following message:
    
      237 System.out.println("DEBUG: OK. Spawned java process terminated 
    with expected exit code of "
      238                         + STOP_PROCESS_EXIT_VAL);
    
    It's somewhat misleading since the test can still fail. I think the 
    following is also misleading:
    
      249             if (testFailed) {
      250                 output.reportDiagnosticSummary();
      251                 if (output.getStderr().contains("Port already in 
    use")) {
      252                     // Need to retry
      253                     return true;
      254                 }
      255             }
    
    The test can still pass after this happens, right? And I think there are 
    other "Test FAILURE" error message that can appear just before this. 
    Perhaps the code above should add a println that indicates that there 
    will be a retry attempt since the failure was due to the port being in use.
    
    Otherwise looks good.
    
    thanks,
    
    Chris
    
    On 7/17/19 1:30 PM, Alex Menkov wrote:
    > Hi Daniil,
    >
    > The fix looks good in general.
    > Couple cosmetic notes (no new webrev required):
    >
    >  162                 needRetry = runTest();
    >  163             }
    >  164             while (needRetry && (attempts++ < MAX_RETRY_ATTEMTS));
    > Please move "while" to the prev line:
    >  163             } while (needRetry && (attempts++ < MAX_RETRY_ATTEMTS));
    >
    >
    >  242                     System.out.println("Test FAILURE on" + name + 
    > " reason: The expected line \"" + READY_MSG
    >  243                             + "\" is not present in the process 
    > output");
    > Please add space: "Test FAILURE on " + name
    >
    > --alex
    >
    > On 07/17/2019 12:46, Daniil Titov wrote:
    >> Hi Chris,
    >>
    >>>     It's a little unclear to me why you moved from ProcessThread to
    >>>    TestProcessThread + Process. An explanation of that would make it 
    >>> easier
    >>>    to understand many of the changes.
    >>
    >> There are two reasons for that:
    >> 1)  For every network interface the test starts a separate thread 
    >> that runs the test for this interface. We want that if the test fails
    >>      due to the bind error the thread not to exit but try to repeat 
    >> the test several times. jdk.test.lib.thread.ProcessThread doesn't 
    >> allow this.
    >> 2) To filter out the cases when the test fails due to the bind error 
    >> we need to parse the process output. jdk.test.lib.thread.ProcessThread
    >>    registers its own pumps for stdin and sdtout  (by calling 
    >> ProcessTools.startProcess()) that consume all output of the process 
    >> and prevent
    >>    the output analyzer from collecting this output.
    >>   Thanks!
    >> --Daniil
    >>
    >> On 7/17/19, 12:11 PM, "Chris Plummer" <chris.plummer at oracle.com> wrote:
    >>
    >>      Hi Daniil,
    >>           It's a little unclear to me why you moved from 
    >> ProcessThread to
    >>      TestProcessThread + Process. An explanation of that would make 
    >> it easier
    >>      to understand many of the changes.
    >>           thanks,
    >>           Chris
    >>           On 7/11/19 10:16 AM, Daniil Titov wrote:
    >>      > Please review the change that fixes an intermittent failure of 
    >> sun/management/jmxremote/bootstrap/JMXInterfaceBindingTest.java
    >>      > test due to ports collision. The tests finds all network 
    >> interfaces and for every interface starts a separate process that tests
    >>      > the connection to JMX agent server for a specific 
    >> ports/interface combination.
    >>      >
    >>      > The test was changed to retry in case of the failure. If the 
    >> subprocess fails to bind and the number
    >>      > of retry attempts doesn't exceed the limit a new pair of 
    >> random ports is selected and the test is run again.
    >>      >
    >>      > Webrev: http://cr.openjdk.java.net/~dtitov/8221303/webrev.01/
    >>      > Bug: https://bugs.openjdk.java.net/browse/JDK-8221303
    >>      >
    >>      > Thanks!
    >>      > --Daniil
    >>      >
    >>      >
    >>
    >>