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From "Eli Collins (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-4156) Seeking to a negative position should throw an IOE
Date Tue, 06 Nov 2012 21:44:12 GMT
Eli Collins created HDFS-4156:
---------------------------------

             Summary: Seeking to a negative position should throw an IOE
                 Key: HDFS-4156
                 URL: https://issues.apache.org/jira/browse/HDFS-4156
             Project: Hadoop HDFS
          Issue Type: Bug
    Affects Versions: 2.0.0-alpha, 1.0.0
            Reporter: Eli Collins


Credit to [~vanzin] for finding this. If you seek() to a position before the start of the
file, the seek() call succeeds, and the following read() call throws an NPE. A more friendly
approach would be to fail the seek() call.

{noformat}
Exception in thread "main" java.lang.NullPointerException
at org.apache.hadoop.hdfs.DFSInputStream.readWithStrategy(DFSInputStream.java:670)
at org.apache.hadoop.hdfs.DFSInputStream.read(DFSInputStream.java:685)
at java.io.DataInputStream.read(DataInputStream.java:83)
at fstest.main(fstest.java:12)
{noformat}

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