Attila Doroszlai created HDDS-2238:
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Summary: Container Data Scrubber spams log in empty cluster
Key: HDDS-2238
URL: https://issues.apache.org/jira/browse/HDDS-2238
Project: Hadoop Distributed Data Store
Issue Type: Sub-task
Components: Ozone Datanode
Affects Versions: 0.5.0
Reporter: Attila Doroszlai
Assignee: Attila Doroszlai
In an empty cluster (without closed containers) logs are filled with messages
from completed data scrubber iterations (~3600 per second for me), if Container
Scanner is enabled ({{hdds.containerscrub.enabled=true}}), eg.:
{noformat}
datanode_1 | 2019-10-03 15:43:57 INFO ContainerDataScanner:114 - Completed an
iteration of container data scrubber in 0 minutes. Number of iterations (since
the data-node restart) : 6763, Number of containers scanned in this iteration :
0, Number of unhealthy containers found in this iteration : 0
{noformat}
Also CPU usage is quite high.
I think:
# there should be a small sleep between iterations
# it should log only if any containers were scanned
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