This is a known issue:
http://issues.apache.org/jira/browse/HADOOP-1212
Nige
On Jun 8, 2007, at 5:35 PM, Bwolen Yang wrote:
Looks like this problem is not related to the upgrade, but a
problem in 0.13.0.
Basically if I were to delete all the dfs directories and reformat,
the datanodes come up ok. however, if I were to reformat again, the
datanodes won't be able to come up due to the exception mentioned
below.
bwolen
On 6/8/07, Bwolen Yang <[EMAIL PROTECTED]> wrote:
Hi.
Upgrading from 0.12.3 to 0.13 seems to work fine. (at least the
before and after "fsck "and "dfs -lsr" outputs matches).
Then I shut down the DFS cluster, and reformat the DFS (to start a
new
round of performance test). The datanodes all have the following
exception.
2007-06-08 17:13:27,985 ERROR org.apache.hadoop.dfs.DataNode:
java.io.IOExceptio
n: Incompatible namespaceIDs in /mnt/hadoop/bwolen/dfs/data: namenode
namespaceID = 1399119814; datanode namespaceID = -1646824738
I'll blow away these directories and start from scratch. Just
thought
to let you know.
bwolen
