Custom LoginModule not found, error "Found in negative cache"

Question

Hi all,
I am working with NetWeaver 2004s SR3 SP14 on SuSE 10 with Oracle.  I am
writing a custom LoginModule and I get this error in the default trace file when my
sample app tries to use my login module:
[EXCEPTION]
{1}#2#com.mycompany.dc.netweaver.MyLoginModule#java.lang.ClassNotFoundException:
com.mycompany.dc.netweaver.MyLoginModule
Found in negative cache
The class name for my login module is: MyLoginModule and it is in library:
MyLoginModuleLibrary (so the name of the library project in Developer
Studio is MyLoginModuleLibrary and it is the component name in
server/provider.xml for that project).  MyLoginModule requires the use of
classes in another library also written by my company (called
mycompany_libs).  To complicate matters, mycompany_libs uses JNI.  I tried
adding the JNI library directory to the LD_LIBRARY_PATH shell variable
(set before running startsap in the sidadm user's shell).  Though I
could find few references to developing using JNI (so if someone out there
has references for using JNI with Netweaver, it would be great, and very
helpful if you would post them). 
I was able to successfully deploy MyLoginModuleLibrary and mycompany_libs.
I put the following in the property: LoginModuleClassLoaders in the
security provider properties:
library:mycompany.com~MyLoginModuleLibrary,library:mycompany.com~mycompany_libs
(Note:  I changed the provider name server/provider.xml to mycompany.com
for both libraries: MyLoginModuleLibrary and mycompany_libs and that is the
reason why I have the "mycompany.com~" prefix before each library name.)
I added mycompany_libs to the references in server/provider.xml for
MyLoginModuleLibrary.  The references look good in the ClassLoader viewer.
But I still get this error.  I've restarted the server several times to
try to clear the negative cache (using stopsap, then startsap), but to no
avail. 
One thing that I find interesting (and it could be a possible clue to the
problem) is that neither library:mycompany.com~MyLoginModuleLibrary nor
library:mycomany.com~mycompany_libs appears in the ClassLoader name
or in the References in the error message in the log file.  I don't know why not
(I would guess that both of these entries should be in the references and Class
loader name in the log file).
Any ideas? 
-- Katrina

Answer 1

I tried 2 tests:
(1) I kept all names the same, but removed all of the complexity from the login module.  This new login module would just return true when login() is called and add the principal: "sillyuser at testing dot com" to the principal list when commit() is called.
(2) Just like the first test (i.e. a very simple login module that does no real authentication at all), except I changed the name of the library, the LoginModule class, and the jar file.  The provider name was still mycompany.com.  I corrected references in LoginModuleLibraryLoaders property in Security Provider.
Test (1) had the same error (ClassNotFoundException "Found in negative cache"), but test (2) worked!  It was able to load my login module and I was able to see the trace entries in the log file.
So, I guess the problem is that the "negative cache" is not getting cleared.  Anyone know how to clear it?
Thanks,
Katrina