server: store cannot turn into tombstone due to limited resources #1227
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Previously this code would bury multiple stores, but now it will only bury one. |
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@gregwebs You're absolutely right. I didn't notice that before. |
gregwebs
approved these changes
Aug 30, 2018
nolouch
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Aug 31, 2018
server/cluster.go
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| if c.storeIsEmpty(store.GetId()) { | ||
| err := c.BuryStore(store.GetId(), false) | ||
| offlineStore := store.Store | ||
| if c.storeIsEmpty(offlineStore.GetId()) { |
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storeIsEmpty need to dump all regions. Can we improve it?
server/cluster.go
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| if !store.IsLowSpace(cluster.GetLowSpaceRatio()) { | ||
| allStoresFull = false | ||
| } | ||
| upStoreCount++ |
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will count the Tombstone store as up store?
disksing
reviewed
Aug 31, 2018
server/cluster.go
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| } | ||
| } | ||
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| if offlineStores == nil { |
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It is a good habit to use len(offlineStores) == 0 instead, compare slice to nil could lead to unexpected result in some cases.
disksing
approved these changes
Sep 3, 2018
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/rebuild |
rleungx
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disksing
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Sep 5, 2018
server/cluster.go
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| err := c.BuryStore(store.GetId(), false) | ||
| offlineStore := store.Store | ||
| // If the store is empty, it can be buried. | ||
| if cluster.isPrepared() && cluster.getStoreRegionCount(offlineStore.GetId()) == 0 { |
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Do we really need to check isPrepared() here? I've noticed that after #1225 all regions will be put to RegionsInfo on startup (regardless of whether the leader is nil)
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What problem does this PR solve?
This PR closes #1221.
What is changed and how it works?
When setting a store to
Offline, it won't turn intoTombstone, if there are no extra space or nodes to accommodate the extra replicas. This PR will show warning message to let user know about it.Check List
Tests