rstest created HBASE-29857:
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Summary: BucketCache fails to start when persistence file was
written with empty cache
Key: HBASE-29857
URL: https://issues.apache.org/jira/browse/HBASE-29857
Project: HBase
Issue Type: Bug
Components: regionserver
Affects Versions: 2.6.3
Reporter: rstest
When a RegionServer with BucketCache persistence enabled is restarted, if the
BucketCache was empty at shutdown time, the new RegionServer fails to start
with a `NullPointerException` in `BucketCache.parsePB()`.
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