datanode decomissioning

Question

I have a two node cluster with master and slave, master is also acting as a slave. with replication factor as 3. I want to decommission a slave machine but when i follow the decommissioning procedure all i can see is "decommissioning in progress".  I waited for a whole weekend but  still its reflecting as decommissioning in progress., Want to know the reason for the same...

Answer 1

You have set the replication factor to 3. And you have three nodes. You are trying to delete one node which would result in the total nodes to be less than the replication factor. And due to this, the decommissioning is getting stuck. The number of nodes should at least be equal to the replication factor. The solution would be to set the replication factor to 2 and then try decommissioning.