Debug Log not working with RESTResource

Question

I have the following class:

@RestResource(urlMapping='/myservice')
global with sharing class MyService {

    @HttpPost
    global static String newMessage() {
        RestRequest req = RestContext.request;
        System.debug(LoggingLevel.ERROR, 'MyService.newMessage body:\n ' + req.requestBody);
        return 'Testing... 1,2,3';
    }
}

I can't find the debug statement anywhere. I tried adding my user to the debug logs monitored users and tried using the Developer Console. I tried everything mentioned here: Debug not working? I know the class is running because I tested the service and I get the response "Testing... 1,2,3".

Answer 1

Following are the steps i would take to solve this issue:

1. Sometimes the web-services are invoked by user-accounts dedicated to Integration or Web-Services. If that is true, did you try to add that user in Debug Logs?

2. Check the the "Log Filters" for the Web-Service class.

3. Try using System.debug() without 'LoggingLevel' Option.

4. Its possible to miss debug logs , if there are so many debug logs generated in short period of time. Salesforce can Only hold up-to 20 request at any given time. Open Developer console before you invoke the service. Salesforce automatically refreshes the console. By this way, there are less chance to miss the Debug Log.

If you tried all the above steps and still fail to get debug logs , i would try to send a APEX email (Just for the heck of it). This is just to narrow down the issue and figure out if the issue is really with Debug Logs.

Answer 2

I think logs are not enabled for REST Apex. I am not able to set trace flag on the REST Resource class. Although the class exists and I am able to select the class for setting the trace, I get following error when I try to save the trace flag.