BulkInsert is not thread safety

Question

BulkInsert is not thread safety

simai4 opened this issue 5 years ago · comments

If I execute many BulkInsert in one table in many threads (parrallel executing BulkInsert), I have Exception("More id values generated than we had entities. Something went wrong, try again.").

It happens because the increment of the primary key (user integer) and the number of inserted records are compared, but they may differ when the insertion is parallel.

Måns Tånneryd · Answer 1 · Thu Apr 25 2019 05:14:12 GMT+0800 (China Standard Time)

Hi!

Thanks for your feedback. Which version are you using?

simai4 · Answer 2 · Thu Apr 25 2019 22:45:52 GMT+0800 (China Standard Time)

Hi,
I'm using 1.2.2 version.

komrados · Answer 3 · Wed May 01 2019 13:17:07 GMT+0800 (China Standard Time)

Hi,
I'm also experiencing this problem at version 1.2.3

Måns Tånneryd · Answer 4 · Wed May 01 2019 21:27:13 GMT+0800 (China Standard Time)

When you say "user integer", exactly what do you mean? Have you defined your own type?

Måns Tånneryd · Answer 5 · Thu May 02 2019 03:10:31 GMT+0800 (China Standard Time)

Thinking about this a bit more and reading the original bug report by simai4 again, I realize that I need to replace the "select ident...." based way of matching generated primary keys with the merge-based variant. I'll try to get it fixed and tested before the weekend.

Thanks for the valuable feedback!