Last modified: 2014-11-07 11:47:01 UTC
On https://www.wikidata.org/wiki/Special:NewItem : I tried to create an item for dewiki "Oberbilk" but got the error "Could not create a new page. It already exists." although it does not exist. The 3rd try was successful then: https://www.wikidata.org/wiki/Q8249663
This happens quite frequently to me. Usually the 2nd try is successful.
This is still happening!
This happened a lot to me the past 2 weeks
@Maarten: my bot is currently mass-importing sitelinks from dewiki. I think this is an annoying bug and should be resolved in the near future.
Created https://bugzilla.wikimedia.org/show_bug.cgi?id=62126 to make Pywikibot not crash on this.
So this was caused by Inkowik's bot creating new items too fast. It should be slower now and the problem gone away. I am not sure what we can do to prevent it from happening again. We will investigate.
So two users create an item at the same time. Both fire off a transaction. Both get the same id. One gets a new item, the other one an error because the id was already taken? If you implemnt it like a ethernet collisions, the second one should back off for a random amount of time and than try again. You probably want to implement some throttling too so a bot can't overload it like this bot did.
Change 139794 had a related patch set uploaded by Xqt: (bug 66619) Ignore TypeError for bug 46535 https://gerrit.wikimedia.org/r/139794
Can someone please explain if/how the above patch relates to the issue of this bug?
I have not heard anymore complaints about this so I assume this is fine now. Please reopen if it is still problematic.
