create type if not exists coordinates (
    latitude double,
    longitude double
);

create table if not exists forecast_configuration(
    description text,
    coordinates list<frozen <coordinates>>,
    forecast boolean,
    start_date timestamp,
    end_date timestamp,
    user_email text,
    notify_user boolean,
    variables text,
    PRIMARY KEY(description)
);

insert into forecast_configuration (description,coordinates,forecast,start_date, end_date, user_email,notify_user,variables) VALUES ('teste forecast2',[{ latitude : 38.5 ,longitude : -8},
  { latitude : 38.52,longitude : -8.02 }], false, '2015-01-01', '2017-01-01', 'user_email@gmail.com',true,'rh,temp');

ERROR 14:55:09 JVM state determined to be unstable.  Exiting forcefully due to: java.lang.OutOfMemoryError: Java heap space

$save['coordinates'] = json_encode($save['coordinates']); // I think my error can be here.

$statement = new CassandraSimpleStatement(
            "INSERT INTO forecast_configuration (description, coordinates, forecast, start_date, end_date, user_email,
              notify_user, variables) " .
            "VALUES (?, ?, ?, ?, ?, ?, ?, ?)"
        );

$options = new CassandraExecutionOptions(array('arguments' => $save));
$session->execute($statement, $options);