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From "Amila Chinthaka Suriarachchi (JIRA)" <>
Subject [jira] Resolved: (AXIS2-3400) AxisService name not unique enough
Date Fri, 21 Dec 2007 06:41:43 GMT


Amila Chinthaka Suriarachchi resolved AXIS2-3400.

    Resolution: Fixed

fixed the issue. added a static counter to generate unique service names

> AxisService name not unique enough
> ----------------------------------
>                 Key: AXIS2-3400
>                 URL:
>             Project: Axis 2.0 (Axis2)
>          Issue Type: Bug
>          Components: kernel
>    Affects Versions: 1.3
>            Reporter: David Poon
>            Priority: Blocker
> The generated (client) stub implementation's populateAxisService() method creates the
AxisService name using Object.hashCode() as a means to "ensure" uniqueness, for example:
> //creating the Service with a unique name
> _service = new org.apache.axis2.description.AxisService("IsisLocation" + this.hashCode());
> In our performance and stress test runs, we find that from time to time, "duplicate name
found" errors would occur. We reuse the same configuration context instance over multiple
client service invocations. The javadoc of java.lang.Object.hashCode() states that:
> "... It is not required that if two objects are unequal according to the java.lang.Object.equals(java.lang.Object)
method, then calling the hashCode method on each of the two objects must produce distinct
integer results. ... As much as is reasonably practical, the hashCode method defined by class
Object does return distinct integers for distinct objects. (This is typically implemented
by converting the internal address of the object into an integer, but this implementation
technique is not required by the JavaTM programming language.)"
> In essence uniqueness is not guaranteed.
> Even though the Stub's finalize() method calls its own cleanup() method (which would
remove the AxisService name), it is still possible for a duplicate name being generated whilst
the other Stub is still in use (by another thread).
> Perhaps in addition to using hashCode(), a static incrementing counter could be appended
to the generated name as well?

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