Ravi Prakash created HDFS-4832:
----------------------------------
Summary: Namenode doesn't change the number of missing blocks in
safemode when DNs rejoin
Key: HDFS-4832
URL: https://issues.apache.org/jira/browse/HDFS-4832
Project: Hadoop HDFS
Issue Type: Bug
Affects Versions: 0.23.7, 3.0.0, 2.0.5-beta
Reporter: Ravi Prakash
Assignee: Ravi Prakash
Priority: Critical
Courtesy Karri VRK Reddy!
{quote}
1. Namenode lost datanodes causing missing blocks
2. Namenode was put in safe mode
3. Datanode restarted on dead nodes
4. Waited for lots of time for the NN UI to reflect the recovered blocks.
5. Forced NN out of safe mode and suddenly, no more missing blocks anymore.
{quote}
I was able to replicate this on 0.23 and trunk. I set
dfs.namenode.heartbeat.recheck-interval to 1 and killed the DN to simulate
"lost" datanode.
Without the NN updating this list of missing blocks, the grid admins will not
know when to take the cluster out of safemode.
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira
