-
Notifications
You must be signed in to change notification settings - Fork 4.3k
New issue
Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.
By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.
Already on GitHub? Sign in to your account
Make sure all in-flight streams close when ClientConn.Close() is called. #1136
Merged
Conversation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Also add a test similar to the repro from the issue? |
ping |
menghanl
approved these changes
Apr 20, 2017
There was a problem hiding this comment.
Choose a reason for hiding this comment
The reason will be displayed to describe this comment to others. Learn more.
LGTM
This was referenced May 31, 2017
MakMukhi
pushed a commit
that referenced
this pull request
Jun 14, 2017
This patch writes client-side error before closing the active stream to fix blocking `RecvMsg` issue on `grpc.ClientStream` [1]. Previous gRPC client stream just exits on `ClientTransport.Error` [2]. And latest gRPC added another select case on client connection context cancel [3]. Now when client stream closes from client connection context cancel, it calls `CloseStream` with `ErrClientConnClosing` error. And then the stream gets deleted from `*http2Client.activeStreams`, without processing the error [4]. Then in-flight `RecvMsg` call on this client will block on `*parser.Reader.recvMsg` [5]. In short, 1. `ClientConn.Close`. 2. in-flight streams will receive case `<-cc.ctx.Done()` https://github.com/grpc/grpc-go/blob/master/stream.go#L253-L255. 3. `cs.closeTransportStream(ErrClientConnClosing)` calls `cs.t.CloseStream(cs.s, err)`. 4. `CloseStream(cs.s, err)` calls `delete(t.activeStreams, s.id)` without handling the error. 5. in-flight streams will never receive error, left hanging. I can reproduce in etcd tests with in-flight `recvMsg` calls to `Observe` RPC. --- [1] etcd-io/etcd#7896 (comment) [2] https://github.com/grpc/grpc-go/blob/v1.2.x/stream.go#L235-L238 [3] #1136 [4] https://github.com/grpc/grpc-go/blob/master/transport/http2_client.go#L569 [5] https://github.com/grpc/grpc-go/blob/master/rpc_util.go#L280 Signed-off-by: Gyu-Ho Lee <gyuhox@gmail.com>
menghanl
pushed a commit
to menghanl/grpc-go
that referenced
this pull request
Jun 14, 2017
This patch writes client-side error before closing the active stream to fix blocking `RecvMsg` issue on `grpc.ClientStream` [1]. Previous gRPC client stream just exits on `ClientTransport.Error` [2]. And latest gRPC added another select case on client connection context cancel [3]. Now when client stream closes from client connection context cancel, it calls `CloseStream` with `ErrClientConnClosing` error. And then the stream gets deleted from `*http2Client.activeStreams`, without processing the error [4]. Then in-flight `RecvMsg` call on this client will block on `*parser.Reader.recvMsg` [5]. In short, 1. `ClientConn.Close`. 2. in-flight streams will receive case `<-cc.ctx.Done()` https://github.com/grpc/grpc-go/blob/master/stream.go#L253-L255. 3. `cs.closeTransportStream(ErrClientConnClosing)` calls `cs.t.CloseStream(cs.s, err)`. 4. `CloseStream(cs.s, err)` calls `delete(t.activeStreams, s.id)` without handling the error. 5. in-flight streams will never receive error, left hanging. I can reproduce in etcd tests with in-flight `recvMsg` calls to `Observe` RPC. --- [1] etcd-io/etcd#7896 (comment) [2] https://github.com/grpc/grpc-go/blob/v1.2.x/stream.go#L235-L238 [3] grpc#1136 [4] https://github.com/grpc/grpc-go/blob/master/transport/http2_client.go#L569 [5] https://github.com/grpc/grpc-go/blob/master/rpc_util.go#L280 Signed-off-by: Gyu-Ho Lee <gyuhox@gmail.com>
Sign up for free
to subscribe to this conversation on GitHub.
Already have an account?
Sign in.
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Fixes #1133