fix add value check
@@ -1280,6 +1280,9 @@ public interface FessProp {
return source.entrySet().stream().map(e -> {
final String key = e.getKey();
Object value = e.getValue();
+ if (value == null) {
+ value = StringUtil.EMPTY;
+ }
if (value instanceof String || value == null) {
return new Pair<>(key, value);
}
