[HDFS-4156] Seeking to a negative position should throw an IOE

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.0.0, 2.0.0-alpha
• Fix Version/s: 2.0.3-alpha
• Labels: newbie
• Hadoop Flags: Reviewed
• Assignee: Eli Reisman
• Reporter: Eli Collins
• Created: 06/Nov/12 21:43
• Updated: 15/Feb/13 13:12
• Resolved: 18/Nov/12 02:12

Description

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.

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)