Occasionally, I will get the exception below when trying to load the bouncy castle library. One would think it is a problem in BC, except for the fact that the NPE is clearly coming from JBoss's RepositoryClassLoader.

The hard part about this bug is that it happens some of the time and not other times. It's been impossible to reliably reproduce. Restarting the appserver/jvm causes the problem to go away and everything works just fine, but eventually it will happen again.

BC is being started in a @Service Bean. The start() method looks like this:

public void start() throws Exception

Has anyone else seen this problem?

Caused by: java.security.NoSuchAlgorithmException: No such algorithm: AES/CBC/PKCS5Padding
at javax.crypto.Cipher.getInstance(DashoA13*..)
at javax.crypto.Cipher.getInstance(DashoA13*..)
at com.kink.heart.biz.system.EncryptorBean.encrypt(EncryptorBean.java:349)
... 73 more
Caused by: java.security.NoSuchAlgorithmException: Error constructing implementation (algorithm: AES, provider: BC, class: org.bouncycastle.jce.provider.JCEBlockCipher$AES)
at java.security.Provider$Service.newInstance(Provider.java:1201)
... 76 more
Caused by: java.lang.NullPointerException
at org.jboss.mx.loading.RepositoryClassLoader.findClass(RepositoryClassLoader.java:620)
at java.lang.ClassLoader.loadClass(ClassLoader.java:316)
at org.jboss.mx.loading.RepositoryClassLoader.loadClassImpl(RepositoryClassLoader.java:464)
at org.jboss.mx.loading.RepositoryClassLoader.loadClass(RepositoryClassLoader.java:405)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at java.security.Provider$Service.getImplClass(Provider.java:1218)
at java.security.Provider$Service.newInstance(Provider.java:1176)
... 76 more