Illegal attempt to associate a collection with two open sessions in au.org.ala.spatial.Task.history

[vjrj]

Trying to copy a first layer for a remote server I get:

"1723111557690": "failed (id:13): Illegal attempt to associate a collection with two open sessions. Collection : [au.org.ala.spatial.Task.history#13]; nested exception is org.hibernate.HibernateException: Illegal attempt to associate a collection with two open sessions. Collection : [au.org.ala.spatial.Task.history#13]",

It sounds like a concurrent modification of a task.

[adam-collins]

When I attempt to reproduce the error by using a restarted thumbnail task, it succeeds with out error. I do not know if something else fixed it or if the process to reproduce the error differs.

[vjrj]

I was doing a layer copy (that do a thumbails task too). See the time in these two tasks:

[adam-collins]

I managed to reproduce it using the admin URL on the / page that starts the Thumbnail task. I have added a fix for this specific use case. I could not reproduce it with layer copy.

The plan is to run more tests in a clean environment, once available.