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From "Hong Tang (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-6177) FSInputChecker.getPos() would return position greater than the file size
Date Fri, 07 Aug 2009 04:17:15 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-6177?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Hong Tang updated HADOOP-6177:
------------------------------

    Attachment: hadoop-6177-testcase.patch

The patch file modifies existing test cases to check that after reading through the file,
the final offset would be the same as the file offset. On my local machine, it yields:

{noformat}
% ant test-core -Dtestcase=TestChecksumFileSystem
run-test-core:
   [delete] Deleting directory /Users/htang/Documents/Work/workspace/hadoop-common/build/test/data
    [mkdir] Created dir: /Users/htang/Documents/Work/workspace/hadoop-common/build/test/data
   [delete] Deleting directory /Users/htang/Documents/Work/workspace/hadoop-common/build/test/logs
    [mkdir] Created dir: /Users/htang/Documents/Work/workspace/hadoop-common/build/test/logs
    [junit] Running org.apache.hadoop.fs.TestChecksumFileSystem
    [junit] Tests run: 2, Failures: 1, Errors: 0, Time elapsed: 0.59 sec
    [junit] Test org.apache.hadoop.fs.TestChecksumFileSystem FAILED
% tail build/test/TEST-org.apache.hadoop.fs.TestChecksumFileSystem.txt
------------- ---------------- ---------------

Testcase: testgetChecksumLength took 0.196 sec
Testcase: testVerifyChecksum took 0.373 sec
        FAILED
expected:<7> but was:<8>
junit.framework.AssertionFailedError: expected:<7> but was:<8>
        at org.apache.hadoop.fs.TestLocalFileSystem.readFile(TestLocalFileSystem.java:45)
        at org.apache.hadoop.fs.TestChecksumFileSystem.testVerifyChecksum(TestChecksumFileSystem.java:57)
{noformat}

> FSInputChecker.getPos() would return position greater than the file size
> ------------------------------------------------------------------------
>
>                 Key: HADOOP-6177
>                 URL: https://issues.apache.org/jira/browse/HADOOP-6177
>             Project: Hadoop Common
>          Issue Type: Bug
>            Reporter: Hong Tang
>         Attachments: hadoop-6177-testcase.patch
>
>
> When using a small buffer (< 512 bytes) to read through the whole file, the final
file position is 1+ the file size.

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