I got an Error (ETIMEOUT) when I try to Post Data with node js into an SAP HANA Database

Question

I'm trying to post data to the HANA database with Node.js. Now I get this error:

 "Error: connect ETIMEDOUT 141.**.**.***:3051 at TCPConnectWrap.afterConnect [as oncomplete]". 

My code looks like this:

 var http = require('http'); var httpOptions = { host: 'h05-d02.ucc.ovgu.de', path: '/gbi013/oData/SensorData.xsodata/SENSOR_DATA', method: 'POST', port: 30515, headers: { 'Authorization': 'Base64', 'Content-Type': 'application/json' } }; updateHANA(); function updateHANA() { var req = http.request(httpOptions).on('error', function(err){ console.error(err); }); var jsonData = { "ID": 13, "TEMPERATURE": "22.99", "HUMIDITY": "33.33", }; var strData = JSON.stringify(jsonData); console.log(strData); console.log(req.statusMessage) req.write(strData); req.end(); }; 

Where did I make a mistake? I'm an absolute beginner. I hope someone can help me. Thanks!

Answer 1

At first sight, I'd say the port you try to bind your service to 30515 in the httpOptions variable is wrong. The error message could be interpreted in a way that the http module only considers the first 4 digits 3051 and fails to connect to it due to a timeout (which makes sense if there is no service listening on this port).

Your choice of port is odd, too. It looks very much like the SQL communcation port of a default tenant database in HANA (if the system's instance number is 05 ).

So, maybe you want to try this with a more "traditional" service port, like 80 or 8080 first and if that works you can check what is blocking you from using port 3051 (could also be eg a firewall blocking the port).