java - Error while posting JSON using JSOUP concept -

i want post nested json input saiku server.i got successful in postman while trying in java code have error such as

errorjava.lang.illegalargumentexception: data value must not null 

below code posting nested json saiku server.

             // nested json             jsonobject object = new jsonobject();             jsonobject querymodel = new jsonobject();             jsonobject cube = new jsonobject();             jsonobject parameters = new jsonobject();             jsonobject plugin = new jsonobject();             jsonobject properties = new jsonobject();             jsonobject metadata = new jsonobject();             jsonobject axes = new jsonobject();             jsonobject details = new jsonobject();             jsonobject columns = new jsonobject();             jsonobject filter = new jsonobject();             jsonobject rows = new jsonobject();             jsonobject measures = new jsonobject();             jsonobject o = new jsonobject();             jsonobject hierarchies = new jsonobject();             jsonobject o2 = new jsonobject();             jsonobject levels = new jsonobject();             jsonobject year = new jsonobject();             jsonobject cmembers = new jsonobject();              cube.put("caption", null);             cube.put("catalog", "global earthquakes");             cube.put("connection", "earthquakes");             cube.put("name", "earthquakes");             cube.put("schema", "global earthquakes");             cube.put("uniquename",                     "[earthquakes].[global earthquakes].[global earthquakes].[earthquakes]");             cube.put("visible", boolean.false);              properties.put("org.saiku.connection.scenario", boolean.false);             properties.put("org.saiku.query.explain", boolean.true);             properties.put("saiku.olap.query.automatic_execution", boolean.true);             properties.put("saiku.olap.query.drillthrough", boolean.true);             properties.put("saiku.olap.query.filter", boolean.true);             properties.put("saiku.olap.query.nonempty", boolean.true);             properties.put("saiku.olap.query.nonempty.columns", boolean.true);             properties.put("saiku.olap.query.nonempty.rows", boolean.true);             properties.put("saiku.olap.result.formatter", "flattened");             properties.put("saiku.ui.render.mode", "table");               list<string> = new arraylist<string>();             list<string> ab = new arraylist<string>();              querymodel.put("axes", axes);             querymodel.put("calculatedmeasures", a);             querymodel.put("calculatedmembers", ab);             querymodel.put("details", details);             querymodel.put("lowestlevelsonly", boolean.false);             querymodel.put("visualtotals", boolean.false);             querymodel.put("visualtotalspattern", null);              axes.put("columns", columns);             axes.put("filter", filter);             axes.put("rows", rows);              list<object> oa = new arraylist<object>();             oa.add(o);             o.put("name", "average magnitude");             o.put("type", "exact");              details.put("axis", "columns");             details.put("location", "bottom");             details.put("measures", oa);              list<string> b = new arraylist<string>();             list<string> bb = new arraylist<string>();             list<string> bc = new arraylist<string>();              columns.put("aggregators", b);             columns.put("filters", bb);             columns.put("hierarchies", bc);             columns.put("hierarchizemode", null);             columns.put("location", "columns");             columns.put("mdx", null);             columns.put("nonempty", boolean.true);             columns.put("sortevaluationliteral", null);             columns.put("sortorder", null);              list<string> c = new arraylist<string>();             list<string> cb = new arraylist<string>();             list<string> cc = new arraylist<string>();              filter.put("aggregators", c);             filter.put("filters", cb);             filter.put("hierarchies", cc);             filter.put("hierarchizemode", null);             filter.put("location", "filter");             filter.put("mdx", null);             filter.put("nonempty", boolean.true);             filter.put("sortevaluationliteral", null);             filter.put("sortorder", null);              list<string> d = new arraylist<string>();             list<string> db = new arraylist<string>();             list<object> o2a = new arraylist<object>();             o2a.add(o2);             o2.put("cmembers", cmembers);             o2.put("levels", levels);             o2.put("name", "[date].[time]");              rows.put("aggregators", d);             rows.put("filters", db);             rows.put("hierarchies", o2a);             rows.put("hierarchizemode", null);             rows.put("location", "rows");             rows.put("mdx", null);             rows.put("nonempty", boolean.true);             rows.put("sortevaluationliteral", null);             rows.put("sortorder", null);              //hierarchies.put("0", o2a);              levels.put("year", year);              year.put("name", "year");              object.put("cube", cube);             object.put("mdx", null);             object.put("metadata", metadata);             object.put("name", "earth");             object.put("parameters", parameters);             object.put("plugins", plugin);             object.put("properties", properties);             object.put("querymodel", querymodel);             object.put("querytype", "olap");             object.put("type", "querymodel");              system.out.println("++++++++++++++++++++++++++++"+object.tostring());              response execute = jsoup                     .connect(                             "http://localhost:8080/saiku/rest/saiku/api/query/execute/")                     .header("content-type", "application/json")                     .header("accept", "application/json")                     .requestbody(object.tojsonstring())                     .data(object)                     .ignorecontenttype(true)                     .referrer("http://localhost:8080/")                     .cookie("jsessionid", res.cookie("jsessionid"))                     .useragent(                             "mozilla/5.0 (windows nt 6.1; wow64) applewebkit/537.36 (khtml, gecko) chrome/50.0.2661.94 safari/537.36")                     .method(method.post).timeout(10000).execute();             system.out.println("post successfully....."                     + object.tojsonstring()); 

you're mdx paramter you're sending null