[HDFS-5765] Snapshot file is broken after appending to original file

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Duplicate
• Affects Version/s: 2.2.0
• Component/s: hdfs-client
• Assignee: Unassigned
• Reporter: Guo Ruijing
• Created: 14/Jan/14 08:31
• Updated: 14/Jan/14 22:20
• Resolved: 14/Jan/14 22:20

Description

Reproduce Step
1) cat snapshot.sh
sudo -u hdfs hdfs dfs -mkdir /test
sudo -u hdfs hdfs dfsadmin -allowSnapshot /test
rm -rf /tmp/mytest
echo mytest > /tmp/mytest
rm -rf /tmp/myappend
echo myappend > /tmp/myappend
sudo -u hdfs hdfs dfs -copyFromLocal /tmp/mytest /test
sudo -u hdfs hdfs dfs -createSnapshot /test snap1
sudo -u hdfs hdfs dfs -cat /test/.snapshot/snap1/mytest
sudo -u hdfs hdfs dfs -appendToFile /tmp/myappend /test/mytest
echo "expect mytest"
sudo -u hdfs hdfs dfs -cat /test/.snapshot/snap1/mytest
sudo -u hdfs hdfs dfs -deleteSnapshot /test/ snap1
sudo -u hdfs hdfs dfsadmin -disallowSnapshot /test/
sudo -u hdfs hdfs dfs -rm /test/mytest
sudo -u hdfs hdfs dfs -rmdir /test/

2. Test result:
[hadoop@localhost ~]$ ./snapshot.sh
Allowing snaphot on /test succeeded
Created snapshot /test/.snapshot/snap1
mytest
expect mytest
mytest
myappend <<< myappend is not expected