Found solution:

RELOAD FUNCTION;

As the official document explained:
https://cwiki.apache.org/confluence/display/Hive/LanguageManual+DDL#LanguageManualDDL-Create/Drop/Re...
As of HIVE-2573, creating permanent functions in one Hive CLI session may not be reflected in HiveServer2 or other Hive CLI sessions, if they were started before the function was created. Issuing RELOAD FUNCTION within a HiveServer2 or HiveCLI session will allow it to pick up any changes to the permanent functions that may have been done by a different HiveCLI session. Due to backward compatibility reasons RELOAD FUNCTION; is also accepted.