TAR解压缩.bz2文件时报错，请问是什么原因。（详情看帖）

[root@MyLinux me]# tar -jxvf httpd-2.2.19.tar.bz2

bzip2: Data integrity error when decompressing.
        Input file = (stdin), output file = (stdout)

It is possible that the compressed file(s) have become corrupted.
You can use the -tvv option to test integrity of such files.

You can use the `bzip2recover' program to attempt to recover
data from undamaged sections of corrupted files.

tar: Child returned status 2
tar: Error exit delayed from previous errors


请问这会是什么原因