HTTP ERROR 500 Problem accessing /myURL . Reason: java.lang.String cannot be cast to java.util.List Caused by: java.lang.ClassCastException: java.lang.String cannot be cast to java.util.List at org.forgerock.openig.filter.LoggingFilter.writeHeaders(LoggingFilter.java:132 at org.forgerock.openig.filter.LoggingFilter.logResponse(LoggingFilter.java:119) at org.forgerock.openig.filter.LoggingFilter.filter(LoggingFilter.java:86) at org.forgerock.openig.filter.Chain.handle(Chain.java:54)
This error is typically encountered when using the AssignmentFilter and
setting a string value for one of the Headers. All headers are stored in
Lists so the header must be addressed with a subscript. For example, if you
try to set exchange.request.headers['Location'] for a
redirect in the response object, you should instead set
exchange.request.headers['Location'][0]. A header without
a subscript leads to the error above.
