Hazelcast IMap 中的序列化

Question

I'm trying to load data into IMap inside jet pipeLine stage I'm getting the error

Here is my code

    public static Pipeline pipeLineStage(JetInstance jet) {
        Pipeline pipeLine = Pipeline.create();

        BatchStage<DataModel> dbValue = pipeLine.readFrom(Sources.jdbc(
                "jdbc:postgresql://localhost/postgres?user=postgres&password=root",

                        "SELECT  id1, id2, id3, id4\r\n"
                        + " FROM public.tbl_test where id1='3'",

                resultSet -> new DataModel(resultSet.getString(2), resultSet.getString(3), resultSet.getString(4))));

        dbValue.filter(model -> model.getId2().equals("person"))
                .map(model -> JsonUtil.mapFrom(model.getObject_value())).map(map -> {
                    IMap<Object, Object> map1 = jet.getMap("map1");
                    map1.put("employee_id", map.get("id"));
                    return map;
                }).writeTo(Sinks.logger());

        return pipeLine;

    }

Error:-

Exception in thread "main" java.lang.IllegalArgumentException: "mapFn" must be serializable
    at com.hazelcast.jet.impl.util.Util.checkSerializable(Util.java:203)

*If I store the data in a normal Map I'm not getting any error and getting error only if I store in IMap Object and In the above code I'm using model class i,e DataModel and that implements public class DataModel implements Serializable {} ..... Any suggestions would also be helpful.. Thanks *

Answer 1

It appears that you have configured a serialization factory by the name of mapFn which requires serialization. Simply add implements Serializable to the class definition.