Add FB number in the comment

pull/22844/head
Muxi Yan 5 years ago
parent 9f6ce14dd9
commit 9640aa3db8
  1. 16
      src/objective-c/README-CFSTREAM.md

@ -24,14 +24,14 @@ case of problem and you want to disable CFStream on iOS, you can set environment
"grpc\_cfstream=0".
## Caveats
It is known to us that the CFStream API has some bug which will cause gRPC's CFStream networking
layer to stall occasionally. The issue mostly occur on MacOS systems (including iOS simulators on
MacOS); iOS may be affected too but we have not seen issue there. gRPC provides a workaround to this
problem with an alternative poller based on CFRunLoop. The poller can be enabled by setting
environment variable `GRPC_CFSTREAM_RUN_LOOP=1`. Note that the poller is a client side only poller
that does not support running a server on it. That means if an app opts in to the CFRunLoop-based
poller, the app cannot host a gRPC server (gRPC Objective-C does not support running a server but
other languages running on iOS do support it).
It is known to us that the CFStream API has some bug (FB6162039) which will cause gRPC's CFStream
networking layer to stall occasionally. The issue mostly occur on MacOS systems (including iOS
simulators on MacOS); iOS may be affected too but we have not seen issue there. gRPC provides a
workaround to this problem with an alternative poller based on CFRunLoop. The poller can be enabled
by setting environment variable `GRPC_CFSTREAM_RUN_LOOP=1`. Note that the poller is a client side
only poller that does not support running a server on it. That means if an app opts in to the
CFRunLoop-based poller, the app cannot host a gRPC server (gRPC Objective-C does not support running
a server but other languages running on iOS do support it).
## Notes

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