lujie created HDFS-15696:
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Summary: One pontential NPE
Key: HDFS-15696
URL: https://issues.apache.org/jira/browse/HDFS-15696
Project: Hadoop HDFS
Issue Type: Bug
Reporter: lujie
peek can return null at
[https://github.com/apache/hbase/blob/1726160839368df14602da1618e3538955b25f74/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/KeyValueHeap.java#L108]
all its callers have null checker except at
[https://github.com/apache/hbase/blob/1726160839368df14602da1618e3538955b25f74/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/ReversedKeyValueHeap.java#L110]
We shoud add null check for pontential NPE
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