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https://issues.apache.org/jira/browse/HADOOP-12724?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ted Yu updated HADOOP-12724:
----------------------------
Labels: stream (was: )
> Let BufferedFSInputStream implement CanUnbuffer
> -----------------------------------------------
>
> Key: HADOOP-12724
> URL: https://issues.apache.org/jira/browse/HADOOP-12724
> Project: Hadoop Common
> Issue Type: Improvement
> Reporter: Ted Yu
> Priority: Minor
> Labels: stream
>
> When trying to determine reason for test failure over in HBASE-9393, I saw
> the following exception:
> {code}
> testSeekTo[4](org.apache.hadoop.hbase.io.hfile.TestSeekTo) Time elapsed:
> 0.033 sec <<< ERROR!
> java.lang.UnsupportedOperationException: this stream does not support
> unbuffering.
> at
> org.apache.hadoop.fs.FSDataInputStream.unbuffer(FSDataInputStream.java:229)
> at
> org.apache.hadoop.fs.FSDataInputStream.unbuffer(FSDataInputStream.java:227)
> at
> org.apache.hadoop.hbase.io.hfile.HFile.pickReaderVersion(HFile.java:518)
> at org.apache.hadoop.hbase.io.hfile.HFile.createReader(HFile.java:562)
> at
> org.apache.hadoop.hbase.io.hfile.TestSeekTo.testSeekToInternals(TestSeekTo.java:307)
> at
> org.apache.hadoop.hbase.io.hfile.TestSeekTo.testSeekTo(TestSeekTo.java:298)
> {code}
> Here is the cause:
> {code}
> java.lang.ClassCastException: org.apache.hadoop.fs.BufferedFSInputStream
> cannot be cast to org.apache.hadoop.fs.CanUnbuffer
> {code}
> See the comments starting with
> https://issues.apache.org/jira/browse/HBASE-9393?focusedCommentId=15105939&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-15105939
> for background on the HBase patch.
> This issue is to make BufferedFSInputStream implement CanUnbuffer.
> This would benefit hbase unit tests.
> Thanks to [~cmccabe] for discussion.
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