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From John Kelly <John.Ke...@bellhow.com>
Subject mod_jserv/2971: Configurations Class method getList generates null Exception
Date Tue, 08 Sep 1998 17:20:45 GMT

>Number:         2971
>Category:       mod_jserv
>Synopsis:       Configurations Class method getList generates null Exception
>Confidential:   no
>Severity:       critical
>Priority:       medium
>Responsible:    jserv
>State:          open
>Class:          sw-bug
>Submitter-Id:   apache
>Arrival-Date:   Tue Sep  8 10:30:00 PDT 1998
>Last-Modified:
>Originator:     John.Kelly@bellhow.com
>Organization:
apache
>Release:        Apache-1.3.1 Jserv 19980908
>Environment:
Apache 1.3.1
JServ 19980908
Windows NT V 4.0 Service Pack 3
Sun's jdk 1.1.6 
>Description:
In the Configurations Class method Enumeration getList(String), if the
key is not present when calling getVector(String, Vector) - the default
is used (argument #2) as the return value.  In this case, the default
value is a null and the reference to elements() is invalid.

>How-To-Repeat:
Yes.  Simply comment out a required property from jserv.properties such as
security.allowedAddresses.
>Fix:
this snippet may be useful and appears to work:
public Enumeration getList(String key) {
  Vector v = this.getVector(key, null);
  if (v != null)
     return v.elements();
  else
     return null;
}
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