Eli Collins created HDFS-4156:
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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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