JWP seem to be having memory leak issues each time the index rebuild is triggered, generating a heap dump.
We are using Oracle JDBC-OCI driver and the connect string in the UCSRV.ini file looks like:
Known memory leak using Oracle 19 when using Oracle JDBC-OCI driver
Please switch to using Oracle JDBC-THIN driver, and the connection string should look something like SQLDRIVERCONNECT=jdbc:oracle:thin:@xxxxx.
There is a known memory leak with Oracle19 - see reference link below: