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From "Danielle Vella (JIRA)" <axis-...@ws.apache.org>
Subject [jira] Commented: (AXIS-1261) engineConfigFactoryMissing (for concurrent requests)
Date Wed, 09 Feb 2005 18:11:11 GMT
     [ http://issues.apache.org/jira/browse/AXIS-1261?page=comments#action_58834 ]
     
Danielle Vella commented on AXIS-1261:
--------------------------------------

I had the same issue with Axis 1.1.  My problem disappeared when I started using Axis 1.2
RC2.  Does anybody know what code change was made to get this to work?

> engineConfigFactoryMissing  (for concurrent requests)
> -----------------------------------------------------
>
>          Key: AXIS-1261
>          URL: http://issues.apache.org/jira/browse/AXIS-1261
>      Project: Axis
>         Type: Bug
>   Components: Basic Architecture
>     Versions: 1.1
>  Environment: Linux 2.4.20; Java 1.4.1; Tomcat 5.0.19; Axis 1.1 on Pentium4 + 1Gb
>     Reporter: Philip Fletcher

>
> Bug logged at request of Davanum Srinivas:
> To attempt to test concurrent performance of Axis (using samples/userguide/example3),
I have created two testing classes: TestThread (extends Thread:) which calls samples.userguide.example3.Client.main(
args ) from it's run method and Test which simply starts 10 TestThread threads.
> Occasionally (1 in 10) I will get a NullPointerException for the first 2-5 threads often
accompanied by:
> org.apache.axis.configuration.EngineConfigurationFactoryFinder$1 run
> SEVERE: Unable to locate a valid EngineConfigurationFactory
> java.lang.NullPointerException
> The error is generated from line 183 of EngineConfigurationFactoryFinder.java where it
has the following comments:
> log.error(Messages.getMessage("engineConfigFactoryMissing"));
>  // we should be throwing an exception here,
>  //
>  // but again, requires more refactoring than we want to swallow
>  // at this point in time.  Ifthis DOES occur, it's a coding error:
>  // factory should NEVER be null.
>  // Testing will find this, as NullPointerExceptions will be generated
>  // elsewhere.
> The two (very noddy) test classes follow, along with an example stack trace:
> ===TestThread.java===
> public class TestThread extends Thread {
>   private String mythread;
>   public void run() {
>     java.util.Random r = new java.util.Random();
>     int randomtime = r.nextInt() % 250;
>     String tname = Thread.currentThread().getName();
>     String args[] =  { "-lhttp://localhost:8080/axis/services/MyService", tname };
>     //Run twice in this thread
>     samples.userguide.example3.Client.main( args );
>     samples.userguide.example3.Client.main( args );
>   }
> }
> ===Test.java===
> class Test {
>   public static void main(String[] args) {
>    //Start some threads
>     for ( int i=0; i<10; i++ ) {
>       new TestThread().start();
>     }
>   }
> }
> ===Stack Trace===
> $java Test
> Mar 23, 2004 7:25:59 PM org.apache.axis.configuration.EngineConfigurationFactoryFinder$1
run
> SEVERE: Unable to locate a valid EngineConfigurationFactory
> java.lang.NullPointerException
>         at org.apache.axis.client.Service.getEngineConfiguration(Service.java:801)
>         at org.apache.axis.client.Service.getAxisClient(Service.java:143)
>         at org.apache.axis.client.Service.<init>(Service.java:152)
>         at Client.main(Client.java:27)
>         at TestThread.run(TestThread.java:16)
> java.lang.NullPointerException

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