func DeleteRecursive(zconn zookeeper.Conn, zkPath string, version int) error {
// version: -1 delete any version of the node at path - only applies to the top node
err := zconn.Delete(zkPath, int32(version))
if err == nil {
return nil
}
if !ZkErrorEqual(err, zookeeper.ErrNotEmpty) {
return err
}
// Remove the ability for other nodes to get created while we are trying to delete.
// Otherwise, you can enter a race condition, or get starved out from deleting.
_, err = zconn.SetACL(zkPath, zookeeper.WorldACL(zookeeper.PermAdmin|zookeeper.PermDelete|zookeeper.PermRead), int32(version))
if err != nil {
return err
}
children, _, err := zconn.Children(zkPath)
if err != nil {
return err
}
for _, child := range children {
err := DeleteRecursive(zconn, path.Join(zkPath, child), -1)
if err != nil && !ZkErrorEqual(err, zookeeper.ErrNoNode) {
return fmt.Errorf("zkutil: recursive delete failed: %v", err)
}
}
err = zconn.Delete(zkPath, int32(version))
if err != nil && !ZkErrorEqual(err, zookeeper.ErrNotEmpty) {
err = fmt.Errorf("zkutil: nodes getting recreated underneath delete (app race condition): %v", zkPath)
}
return err
}