Caused by: com.sun.xml.wss.XWSSecurityException: java.lang.NullPointerException: signingKey cannot be null
at com.sun.xml.wss.impl.dsig.SignatureProcessor.sign(SignatureProcessor.java:328)
at com.sun.xml.wss.impl.filter.SignatureFilter.process(SignatureFilter.java:313)
at com.sun.xml.wss.impl.HarnessUtil.processWSSPolicy(HarnessUtil.java:83)
at com.sun.xml.wss.impl.HarnessUtil.processDeep(HarnessUtil.java:237)
at com.sun.xml.wss.impl.SecurityAnnotator.processMessagePolicy(SecurityAnnotator.java:162)
at com.sun.xml.wss.impl.SecurityAnnotator.secureMessage(SecurityAnnotator.java:137)
at com.sun.xml.wss.impl.misc.XWSSProcessor2_0Impl.secureOutboundMessage(XWSSProcessor2_0Impl.java:96)
... 29 more
Caused by: java.lang.NullPointerException: signingKey cannot be null