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stop when dn.parent is nil

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fix https://github.com/chrislusf/seaweedfs/issues/473
This commit is contained in:
Chris Lu 2017-06-16 08:27:50 -07:00
parent 72e89b615b
commit 2c7dad589d
1 changed files with 3 additions and 1 deletions
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4
weed/topology/topology_event_handling.go
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@ -56,5 +56,7 @@ func (t *Topology) UnRegisterDataNode(dn *DataNode) {
dn.UpAdjustVolumeCountDelta(-dn.GetVolumeCount())
dn.UpAdjustActiveVolumeCountDelta(-dn.GetActiveVolumeCount())
dn.UpAdjustMaxVolumeCountDelta(-dn.GetMaxVolumeCount())
dn.Parent().UnlinkChildNode(dn.Id())
if dn.Parent() != nil {
dn.Parent().UnlinkChildNode(dn.Id())
}
}