When using the standard EndpointURIEndpointBuilder, for the following URI: The value for the property match is 'eu.PRIMARY_GROUP' (should have been 'eu.PRIMARY_GROUP==4'). The root cause is that URIBuilder#parseQueries() uses StringTokenizer to parse the key-value pairs. Since key-value pairs are fixed-length tuples, it makes more sense to use substr or string.split("=", 2) if we don't mind using Java 1.4 in the core. A workaround is to use property element instead of URI query parameter.