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filecache in yarn usercache is not cleaned up

filecache in yarn usercache is not cleaned up

Since the Upgrade to CDH 5.15 the directories /mnt/disk*/yarn/nm/usercache/datameer/filecache/ are not cleaned properly anymore. There are plenty of subdirectories left from finished jobs containing unpacked jars filling up the disks constantly. I tried already to change the parameters yarn.nodemanager.localizer.cache.cleanup.interval-ms (1000s) and yarn.nodemanager.localizer.cache.target-size-mb (1GB), but it does not change anything.