java.lang.NullPointerException: This exception has no message.

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Solutions on the web

via Google Groups by Balaji, 2 years ago
via Google Groups by Sujit, 2 years ago
via Atlassian JIRA by Seb Ruiz, 1 year ago
This exception has no message.
via Atlassian JIRA by Steve Smith [SYD/AMS/LHR], 1 year ago
This exception has no message.
java.lang.NullPointerException:
at java.util.concurrent.ConcurrentHashMap.get(ConcurrentHashMap.java:768)
at org.jasig.cas.client.proxy.ProxyGrantingTicketStorageImpl.retrieve(ProxyGrantingTicketStorageImpl.java:85)
at org.jasig.cas.client.validation.Cas20ServiceTicketValidator.parseResponseFromServer(Cas20ServiceTicketValidator.java:92)
at org.jasig.cas.client.validation.AbstractUrlBasedTicketValidator.validate(AbstractUrlBasedTicketValidator.java:217)
at blackboard.auth.cas.web.CASLoginAction.getAssertionFromRequest(CASLoginAction.java:196)
at blackboard.auth.cas.web.CASLoginAction.login(CASLoginAction.java:87)

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