Jackson JSON how to set http connection and read timeout

Question

(jersey-common=2.21.0, jackson-core=2.6.1)

How do I set http connection timeouts (connect, read) if createParser(URL url) was invoked? What is the default values used?

    JsonFactory jsonF = new JsonFactory();
    jsonF.enable(JsonParser.Feature.AUTO_CLOSE_SOURCE);
    JsonParser jsonP = jsonF.createParser(url); // URL instance
    try {
        JsonToken token;
        while ( (token=jsonP.nextToken()) != null) {
           if (token == JsonToken.START_OBJECT)
           ..rest "json sax" parser code...
        }
    } finally {
        jsonP.close();
    }

I have few times a week recurring problem when webapp stops reading json sources, task is autorun every 30 minutes. I suspect this http call stalls and starts piling up until JVM goes down.

Should I not use createParser(URL) function in production apps?

Answer 1

You could hack the values

System.setProperty("sun.net.client.defaultConnectTimeout", "10000");
System.setProperty("sun.net.client.defaultReadTimeout", "10000");

More on the settings can be found on https://docs.oracle.com/javase/7/docs/technotes/guides/net/properties.html

Or you can instead do a proper call and then pass the result into the json parser. I would go with the latter.

So to put it simply while URL is great light weight alternative I suggest switching to apache http client or some high level solution.