Erik Krogen created HDFS-12004:
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Summary: Namenode UI continues to list DNs that have been removed
from include and exclude
Key: HDFS-12004
URL: https://issues.apache.org/jira/browse/HDFS-12004
Project: Hadoop HDFS
Issue Type: Bug
Affects Versions: 2.3.0
Reporter: Erik Krogen
Priority: Minor
Initially in HDFS, after a DN was decommission and subsequently removed from
the exclude file (thus removing all references to it), it would still appear in
the NN UI as a "dead" node until the NN was restarted. In HDFS-1773, discussion
about this was had, and it was decided that the web UI should not show these
nodes. However when HDFS-5334 went through and the NN web UI was reimplemented
client-side, the behavior reverted back to pre-HDFS-1773, and
dead+decommissioned nodes once again showed in the dead list. This can be
operationally confusing for the same reasons as discussed in HDFS-1773.
I would like to open this discussion to determine if the regression was
intentional or if we should carry forward the logic implemented HDFS-1773 into
the new UI.
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