Thanks for providing the details of the issue @Geoffrey SOUQUIÈRE
As I can understand the Copy Activity named Item is sometimes taking a much longer time to complete
Have you seen the details of the copy activity during the run, it gives you details like how much time it took to connect to source, to get data from source and time to write to sink
There can be other factors as well like:
1) The source / sink data stores is connected via Self Hosted Integration Runtime (SHIR) and there is some bandwidth issue there
2) If SHIR is used then you can check if some other pipelines run in parallel to this pipeline, in this case, the IR network is distributed for those pipelines as well, which is causing this activity to take longer time than expected
3) Some queries are getting executed at source data store and the data fetch is provided less resources at source end to copy
Can you check these details and let me know, so we can further drill down this error?
Thanks