LDAP Login has stopped working

My login is not working either. I can't see anything in the logs, except a fairly ambiguous stacktrace...

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[2014-02-14 02:56:25,310] ===> Error in thread http-bio-8080-exec-4 at 02/14/2014 02:56 AM

[2014-02-14 02:56:25,310] java.lang.NullPointerException

at p22.a87.dispatch(a87.java:36)

at com.rb.prod.logics.servlet.ComponentServlet.doGet(ComponentServlet.java:271)

at com.rb.prod.logics.servlet.ComponentServlet.doPost(ComponentServlet.java:43)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:641)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)

at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:224)

at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:169)

at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)

at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)

at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)

at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:927)

at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)

at org.apache.catalina.connector.CoyoteAdapter.servi

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