[HADOOP-5085] Copying a file to local with Crc throws an exception

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.20.0
• Component/s: fs
• Hadoop Flags: Reviewed
• Assignee: Hairong Kuang
• Reporter: Hairong Kuang
• Created: 20/Jan/09 18:47
• Updated: 23/Apr/09 19:18
• Resolved: 02/Feb/09 23:51

Description

$ hadoop dfs -get -crc /user/aa/test.txt test.txt
get: org.apache.hadoop.dfs.DistributedFileSystem cannot be cast to
org.apache.hadoop.fs.ChecksumFileSystem

The problem seems to be caused by the line 251 in FsShell#copyToLocal:

250;      if (copyCrc) {
251:        ChecksumFileSystem csfs = (ChecksumFileSystem) srcFS;
               ...
             }

Copying crc files to local should not require the source file system to be ChecksumFileSystem.