Tasks resulting in excessive swapping finish with UnspecifiedTaskError

[kliegr]

After running the task in attachment for several hours, I got

Name: UnspecifiedTaskError
Message: (code 0)
 OK

The java process continued to run with high memory (99% - 90 GB) and CPU use. The error is apparently linked to excessive swapping (multiple kswapd processes running for several hours).
task (9).json.txt