Bo Cui created HBASE-25311:
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Summary: hbase ui throws NPE
Key: HBASE-25311
URL: https://issues.apache.org/jira/browse/HBASE-25311
Project: HBase
Issue Type: Bug
Affects Versions: 2.2.3, 3.0.0-alpha-1
Reporter: Bo Cui
https://github.com/apache/hbase/blob/eca904e0fb438461a8da3f37cea3eaf496988be9/hbase-server/src/main/java/org/apache/hadoop/hbase/master/HMaster.java#L3624
if rs has invalid znode, and restart master, ui will throw NPE.
i encountered this problem during the upgrade.
workaround: restart HBase.
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