16930
88%
master: 89%

Ran 22 Jan 2020 01:07AM UTC

Jobs 1

Files 271

Run time 27s

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Build # 16930

Build Type

push

travis-ci

Committed by

dapengzhang0

Commit Message

netty: fix a race for channelz at server transport creation

A race condition was reported by user in #6601:

`ServerImpl.start()` calls `NettyServer.start()` while holding `ServerImpl.lock`. `NettyServer.start()` awaits a submitted runnable in eventloop. However, this pending runnable may never be executed because the eventloop might be executing some other task, like `ServerListenerImpl.transportCreated()`, that is trying to acquire `ServerImpl.lock` causing a deadlock.

This PR resolves the particular issue reported in #6601 for server with a single port, but `NettyServer` (https://github.com/grpc/grpc-java/blob/v1.26.0/netty/src/main/java/io/grpc/netty/NettyServer.java#L251) and `ServerImpl` (https://github.com/grpc/grpc-java/blob/v1.26.0/core/src/main/java/io/grpc/internal/ServerImpl.java#L184) in general still have the same potential risk of deadlock, which need further fix.

Run Details

16127 of 18426 relevant lines covered (87.52%)

0.88 hits per line

Jobs

ID	Job ID	Ran	Files	Coverage
1	16930.1	22 Jan 2020 01:07AM UTC	0	87.52	Travis Job 16930.1

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