Colin Patrick McCabe created HDFS-7744:
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Summary: Fix potential NPE in DFSInputStream after setDropBehind
or setReadahead is called
Key: HDFS-7744
URL: https://issues.apache.org/jira/browse/HDFS-7744
Project: Hadoop HDFS
Issue Type: Bug
Components: dfsclient
Affects Versions: 2.6.0
Reporter: Colin Patrick McCabe
Assignee: Colin Patrick McCabe
Fix a potential NPE in DFSInputStream after setDropBehind or setReadahead is
called. These functions clear the {{blockReader}}, but don't set {{blockEnd}}
to -1, which could lead to {{DFSInputStream#seek}} attempting to derference
{{blockReader}} even though it is {{null}}.
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