Max Threads in ScriptRunner Cloud

Andrew Lipscomb

So, as the Adaptavist docos say

REST API calls are made in a blocking style (although async methods are provided too)

Async methods look to be useful when you need to fire a bunch of updates to JIRA and don't care about the results from each. Question is; how many threads does each container get access to and what happens when that count is exceeded. 

As an example; if I try something like

import com.mashape.unirest.http.async.Callback
import com.mashape.unirest.http.exceptions.UnirestException

def issueCount = 100
for (int i=1; i<issueCount; i++) {
	put("/rest/api/2/issue/PROJ-${i}")
		.header('Content-Type', 'application/json')
        .body([
        	fields:[
                summary: "This is issue ${i}"
        	]
		]).asStringAsync(new Callback<String>() {

            public void failed(UnirestException e) {
                logger.info("Exception failure ${e.toString()}")
            }
        
            public void completed(HttpResponse<String> response) {
                 logger.info("Responses are pointless here!")
            }
        
            public void cancelled() {
                logger.info("The request has been cancelled");
            }

    	})
        
}

How will this break? Also I have not tested this code beyond a simple example; no guarantees this will even run. 

Edit: more code typos

Jon Mort [Adaptavist]

Hi Andrew,

Your code should work fine, there are a couple of things to be aware of.

1. There is no thread limit, only execution time limit of 30s
2. The number of connections to your JIRA instance is limited to 8 (this is not published and may change)
3. You need to ensure that all the requests finish before the script completes, if you don't in flight requests may not complete, and queued requests will not start.
4. You have a single core to run on, so don't do CPU intensive work on threads and expect things to be faster

Once you start introducing threads you're into the very advanced area of scripts. We are looking into ways to support returning an object for bulk requests, so you don't have to make them all in your script.

Regards,

Jon