I suspect it's 3rd party copy coupled with checksum calculation. There is
a known memory leak in that combination. That needs to be verified and can
be done by looking at the log.

On Wed, 17 Mar 2021, Kenyi Hurtado wrote:

> Unfortunately, neither the user that found the issue nor I were able to reproduce this via e.g.: xrdcp, so it's something that happened under production load only. We got back to 4.11 before attempting to debug the issue further with 4.12 because it was affecting other users too.
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