Hi Chetra, The syntax that you're looking for is "/solr/someCoreName/update?rollback=true".
But I'm afraid Rollback might not be quite what you think it is. You mentioned: "but it doesn't work, whenever there is a commit the request still updates on the server". Yes, that is the expected behavior with rollbacks. Rollbacks reset your index to the last commit point. If there was a commit right before a rollback, the rollback will have no effect. One last point is that you should be very careful using rollbacks. Rollbacks are going to undo all changes to your index since the last commit. If you have more than one client thread changing documents, this can be very dangerous as you will reset a lot of things you didn't intend. Even if you can guarantee that there's only one client making changes to your index, and that client is itself single-threaded, the result of a rollback is still indeterminate if you're using server auto-commit settings. The client-triggered rollback will occasionally race against the server-triggered commit. Will your doc changes get rolled back? They will if the rollback happens first, but if the commit happens right before the rollback, your rollback won't do anything! Anyways rollbacks have their place, but be very careful when using them! Hope that helps, Jason On Wed, Oct 3, 2018 at 4:41 AM Chetra Tep <chetra....@gmail.com> wrote: > > Hi Solr team, > Current I am creating a python application that accesses to solr server. > I have to handle updating document and need a rollback function. > I want to send a rollback request whenever exception occurs. > first I try sth like this from curl command : > curl http://localhost:8983/solr/mysolr/update?command=rollback > and I also try > curl http://localhost:8983/solr/mysolr/update?rollback true > > but it doesn't work. whenever there is a commit the request still updates > on the server. > > I also try to submit xml document <rollback/>, but it doesn't work, too. > > Could you guide me how to do this? I haven't found much documentation > about this on the internet. > > Thanks you in advance. > Best regards, > Chetra
