Bug description: Black List cases for jdk7 display “exception: nul” replace of expected result.

Testsuite name:Javaws/Blacklist Tests
JRE/JDK build: 7b137(jre-7-ea-bin-b137-linux-i586-07_apr_2011.bin )
OS/architecture: rhel6-x86
Spec:http://sqeweb.sfbay.sun.com/deployment1/deployment_6_UR_int_exec_ws/6/deployment/src/javaws/blacklist/files/blacklist1.html
Reproducible: Always
Reproducible on machine:
[If sometimes] Also reproducible on machine:
Is it a platform specific regression: N [If yes] Is it a new platform support:
N [If yes] Regression relative to OS version:
Is it a Regression :N
[If yes] Regression introduced in release/build:
Test result on FCS:
Test run log location:
#Steps to reproduce:
BL001_003:System Level blacklist with deployment cache disabled
and JCP Blacklist option selected
   1.Browser to http://sqeweb.sfbay.sun.com/deployment1/deployment_6_UR_int_exec_ws/6/deployment/docs/javaws/spec/Blacklist_Test_Spec.html
   2.Found BL001_003/scenario 1
   3.Copy Blacklist file into $JAVA_HOME/lib/security. Go to Java Control panel, clear the cache and disable cache. Start IE/Firefox/Mozilla browser, run the following applet.
   

#Expected result:

    The test will run a signed applet, which is trying to download a jar file existing in black list.Therefore the applet should not load successfully, and  JARSigningException should be thrown.
The console should show these details :
security: The jar file is on a blacklist and will not be loaded
com.sun.deploy.net.JARSigningException: The jar file is on a blacklist and will not be loaded
........
.......
Caused by:
java.security.GeneralSecurityException: blacklisted entry!

#Actual result:

   Java Control Panel display “security: The jar file is on a blacklist and will not be loaded . basic: exception: null.” Refer to exception.txt.


#Exception:


security: The jar file is on a blacklist and will not be loaded
basic: exception: null.
java.lang.NullPointerException
at java.util.zip.ZipFile.<init>(Unknown Source)
at java.util.zip.ZipFile.<init>(Unknown Source)
at java.util.jar.JarFile.<init>(Unknown Source)
at java.util.jar.JarFile.<init>(Unknown Source)
at sun.plugin.PluginURLJarFileCallBack$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.plugin.PluginURLJarFileCallBack.retrieve(Unknown Source)
at sun.net.www.protocol.jar.URLJarFile.retrieve(Unknown Source)
at sun.net.www.protocol.jar.URLJarFile.getJarFile(Unknown Source)
at sun.net.www.protocol.jar.JarFileFactory.get(Unknown Source)
at sun.net.www.protocol.jar.JarURLConnection.connect(Unknown Source)
at sun.plugin.net.protocol.jar.CachedJarURLConnection.connect(Unknown Source)
at sun.plugin.net.protocol.jar.CachedJarURLConnection.getJarFileInternal(Unknown Source)
at sun.plugin.net.protocol.jar.CachedJarURLConnection.getJarFile(Unknown Source)
at com.sun.deploy.security.DeployURLClassPath$JarLoader.getJarFile(Unknown Source)
at com.sun.deploy.security.DeployURLClassPath$JarLoader.access$800(Unknown Source)
at com.sun.deploy.security.DeployURLClassPath$JarLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.deploy.security.DeployURLClassPath$JarLoader.ensureOpen(Unknown Source)
at com.sun.deploy.security.DeployURLClassPath$JarLoader.<init>(Unknown Source)
at com.sun.deploy.security.DeployURLClassPath$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.deploy.security.DeployURLClassPath.getLoader(Unknown Source)
at com.sun.deploy.security.DeployURLClassPath.getLoader(Unknown Source)
at com.sun.deploy.security.DeployURLClassPath.getResource(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader$2.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.plugin2.applet.Plugin2ClassLoader.findClassHelper(Unknown Source)
at sun.plugin2.applet.Applet2ClassLoader.findClass(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass0(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass0(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadCode(Unknown Source)
at sun.plugin2.applet.Plugin2Manager.initAppletAdapter(Unknown Source)
at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
basic: Removed progress listener: sun.plugin.util.ProgressMonitorAdapter@46ca65
security: Accessing keys and certificate in Mozilla user profile: null
security: Reset deny session certificate store




#validation:
1.Same issue occurs on javaws-oel5.6-x64-64bit/javaws-oel6-x64-64bit(jre-7-ea-bin-b136-linux-amd64-31_mar_2011.bin);
The same issue also occurs in :
BL001/BL001_003/test2.html
BL001/BL001_003/test3.html
BL001/BL001_005/test1.html
BL001/BL001_005/test2.html
BL001/BL001_005/test3.html