The root cause of this exception seems to be this change in Tomcat. Apparently, the exception is new, previously a deletion failure was simply ignored. Note also the change below that change which no longer deletes the file on garbage collection. This code is triggered at the very end of the action execution so there should be no consequences from what I can see apart from this log message and the fact that possibly the files aren't deleted.

We should probably investigate why the deletion fails and if there is anything we can do to fix this.

Might be possible solution https://stackoverflow.com/a/77626864