FileWatcher Troubleshooting Options
To use file watchers, the database Java virtual machine (JVM) component must be installed.

Check whether java is installed : 

COMP_NAME                                          STATUS
-------------------------------------------------- -----------
Oracle Expression Filter                           VALID
Oracle Enterprise Manager                          VALID
Oracle Workspace Manager                           VALID
Oracle Database Catalog Views                      VALID
Oracle Database Packages and Types                 VALID
JServer JAVA Virtual Machine                       VALID
Oracle XDK                                         VALID
Oracle Database Java Packages                      VALID


8 rows selected.

SQL&gt; l
  1* select comp_name, status from dba_registry