Method does not return when error occurs

In the class PceWebTopovMessageHandler.java, internal class SetPathHandler, method process, when lspType is null the method logs a error, but does not return.
It sends lspType as 6th argument to method
findAndSendPaths(ElementId src, ElementId dst, String bandWidth, String bandWidthType,
String costType, String lspType, String tunnelName)
The method findAndSendPaths does a switch case on lspType expression and will return a NullPointerException if lspType is null
Hence, it the method process should return when lspType is null