ORA-28112: failed to execute policy function

ORA-28112: failed to execute policy function

Cause: The policy function has one or more error during execution.

Action: Check the trace file and correct the errors.

Some instatnce are not closed and it reached to max size
My case I was not closed the preparestatemet and it was in loop and reached to max size
At end of code, closed it

PreparedStatement insertStatement = null;

insertStatement = dBConnection.prepareStatement(query);
—-
insertStatement.clearParameters();
insertStatement.close();