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https://issues.apache.org/jira/browse/HADOOP-8006?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13196522#comment-13196522
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Daryn Sharp commented on HADOOP-8006:
-------------------------------------
We've got a case of inconsistent semantics between {{ChecksumFileSystem}} and
other filesystems. -- there's probably even more inconsistency within those
other filesystems. The issue is whether it's legitimate to seek and/or skip
past EOF on a *read-only* file. It's completely valid to seek/skip past EOF
for a writable stream, but I struggle to see the value in a read-only stream
going beyond EOF.
However, POSIX does say it's ok to seek off the end of any stream. However,
java's skip is supposed to return the actual number of bytes skipped. Perhaps
we should modify {{FSDataInputStream#skip}} to enforce consistency of not
skipping past EOF?
> TestFSInputChecker is failing in trunk.
> ---------------------------------------
>
> Key: HADOOP-8006
> URL: https://issues.apache.org/jira/browse/HADOOP-8006
> Project: Hadoop Common
> Issue Type: Bug
> Components: fs
> Affects Versions: 0.24.0
> Reporter: Uma Maheswara Rao G
> Assignee: Uma Maheswara Rao G
> Attachments: HADOOP-8006.patch, HADOOP-8006.patch
>
>
> Trunk build number 939 failed with TestFSInputChecker.
> https://builds.apache.org/job/Hadoop-Hdfs-trunk/939/
> junit.framework.AssertionFailedError: expected:<10> but was:<0>
> at junit.framework.Assert.fail(Assert.java:47)
> at junit.framework.Assert.failNotEquals(Assert.java:283)
> at junit.framework.Assert.assertEquals(Assert.java:64)
> at junit.framework.Assert.assertEquals(Assert.java:130)
> at junit.framework.Assert.assertEquals(Assert.java:136)
> at
> org.apache.hadoop.hdfs.TestFSInputChecker.checkSkip(TestFSInputChecker.java:194)
> at
> org.apache.hadoop.hdfs.TestFSInputChecker.testChecker(TestFSInputChecker.java:224)
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