mvcc: tighten up watcher cancelation and revision handling #5464
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heyitsanthony
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| break | ||
| } | ||
| break | ||
| } |
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break here, instead of two breaks?
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test failure is related to this change? |
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@gyuho not sure; the test that's failing (TestGRPCStreamRequireLeader) is already broken in master but the failure mode is "etcdserver: not capable" and not a timeout. |
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Oh you already created an issue. Got it. |
| @@ -307,7 +318,7 @@ func (s *watchableStore) moveVictims() (moved int) { | |||
| // try to send responses again | |||
| for w, eb := range wb { | |||
| select { | |||
| case w.ch <- WatchResponse{WatchID: w.id, Events: eb.evs, Revision: w.cur}: | |||
| case w.ch <- WatchResponse{WatchID: w.id, Events: eb.evs, Revision: w.minRev - 1}: | |||
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can we have some comments on why -1?
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lgtm |
heyitsanthony
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still broken following the api capability fixes, will investigate |
heyitsanthony
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It was deadlocking waiting for the recvLoop to finish since the stream recv doesn't close until the handler exits; now it only waits on the send loop. The watcher wg patch is still necessary since the watchStream close needs to be synchronous to avoid spurious goroutine leak errors and must run concurrently with the recvloop goroutine to avoid deadlock |
Makes w.cur into w.minrev, the minimum revision for the next update, and retries cancelation if the watcher isn't found (because it's being processed by moveVictims). Fixes: etcd-io#5459
heyitsanthony
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Makes w.cur into w.minrev, the minimum revision for the next update, and
retries cancelation if the watcher isn't found (because it's being processed
by moveVictims).
Fixes: #5459