Reintegrating a failed data node into an IBM® Db2 Warehouse MPP cluster

You must perform some manual steps to have a failed data node rejoin its cluster.

About this task

To perform this task, you need to have root authority.

Address whatever issue caused the node host failure.
Start the Db2® Warehouse container on the node you want to rejoin to the cluster.
```
docker start Db2wh
```
On the head node, stop the Db2 Warehouse services for the cluster.
```
docker exec –it Db2wh stop
```
On the head node, start the Db2 Warehouse services.
```
docker exec –it Db2wh start
```
The cluster should come up with the same topology as before the data node failure, with the data partitions distributed across all nodes.