6 
Savepoint sp = Database.setSavepoint();
insert new Campaign(Name='test');
Database.rollback(sp);

HttpRequest req = new HttpRequest();
req.setEndpoint('http://google.com');
req.setMethod('GET');
Http http = new Http();
HttpResponse res = 
    http.send(req);
system.debug(req);

If you paste the above code into an anonymous block and execute, you will get the following error message:

System.CalloutException: You ahve uncommitted work pending. Please commit or rollback before calling out

However, as you can see, I am rolling back on the third line there. Am I missing something?

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You're not able to do that, you can't do an HTTP callout either after a DML operation or a setting of a Savepoint. Documentation here mentions DML, but not the Savepoint that I can see, but that is the case.

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  • 3
    Using SavePoint does cost a DML operation, however (of the 150/transaction variety). Transaction Control explains this: "Each savepoint you set counts against the governor limit for DML statements."
    – sfdcfox
    Mar 30, 2015 at 19:54
  • 3
    The error message says "Please commit or rollback before calling out." How, then, am I supposed to rollback to do my callout?
    – mikegedelman
    Apr 1, 2015 at 14:09
  • Why are you rolling back anyway, what would be the point of that? I think in light of what limitations there are around this, you'll need to refactor your code. What is it you're trying to achieve?
    – Phil Hawthorn
    Apr 1, 2015 at 14:11
  • I'm rolling back because of an error condition in a future method, which is invoked by a REST service I've exposed. Client has an endpoint that I can hit with an error message, so the intention is to roll back and then call out to notify of the error.
    – mikegedelman
    Apr 7, 2015 at 14:05
  • Yeah thats going to be tricky without some refactoring. Here's an interesting post that has some creative solutions salesforce.stackexchange.com/questions/54931/…
    – Phil Hawthorn
    Apr 7, 2015 at 15:36

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