OK, restarting all services now fsck shows under-replication. Was it the NameNode restart? John
From: John Lilley [mailto:[email protected]] Sent: Tuesday, March 04, 2014 5:47 AM To: [email protected] Subject: decommissioning a node Our cluster has a node that reboot randomly. So I've gone to Ambari, decommissioned its HDFS service, stopped all services, and deleted the node from the cluster. I expected and fsck to immediately show under-replicated blocks, but everything comes up fine. How do I tell the cluster that this node is really gone, and it should start replicating the missing blocks? Thanks John
