Hi Chetra, In addition to what Jason explained, rollbacks do not work in Solr Cloud.
Thanks, Emir -- Monitoring - Log Management - Alerting - Anomaly Detection Solr & Elasticsearch Consulting Support Training - http://sematext.com/ > On 3 Oct 2018, at 14:45, Jason Gerlowski <gerlowsk...@gmail.com> wrote: > > 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
