presto-main/src/main/java/io/prestosql/execution/QueryStateMachine.java/QueryStateMachine/cleanupQueryQuietly
class QueryStateMachine:    private void cleanupQueryQuietly()
    {
        try {
            metadata.cleanupQuery(session);
        }
        catch (Throwable t) {
            QUERY_STATE_LOG.error("Error cleaning up query: %s", t);
        }
    }