Zhe Zhang created HDFS-8076:
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Summary: Code cleanup for DFSInputStream: use offset instead of
LocatedBlock when possible
Key: HDFS-8076
URL: https://issues.apache.org/jira/browse/HDFS-8076
Project: Hadoop HDFS
Issue Type: Improvement
Reporter: Zhe Zhang
Assignee: Zhe Zhang
This JIRA aims to refactor the signatures {{fetchBlockByteRange}} and
{{actualGetFromOneDataNode}}. Instead of taking a {{LocatedBlock}}, I think
they should just take the starting offset of that block, since they'll later
call {{getBlockAt}} to refresh the location anyway. I think we should make it
clear so the callers are not surprised if the finally used {{LocatedBlock}} is
not the one they passed in.
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