update : after I use sync mode on the client side, this problem is fixed. Does it mean a bug of a mixed use of sync and async mode?
On Tue, Dec 15, 2020 at 3:11 AM 韩飞 <[email protected]> wrote: > I use GRPC C++ lib in my distributed SQL engine. I use server stream that > client side sends "connect" request then the server side sends data packets > by a *sync writer* and client side receive data packets by a *async > reader*. > I use a single stream to pass massive data and be sure that the reader > fetches data packets promptly, but I find the stream is halted by *every > 4-5 seconds* sometimes. > To look into this problem, I open the flowctl and timer trace log. I > finder the server (sender) consumes out the remote window very fast and the > stream is moved to *stalled list.* the log is in client.log > <https://gist.github.com/hanfei1991/cdaa7078a1bebbde97b75e490ff9b343> > > We can find that in 12:39s stream 11 is added to stalled list and waited > for a stream updt, in 12:43s , a timer thread receive it and reset the > window size, then unblock this write call. > > On server side, the log is server.log > <https://gist.github.com/hanfei1991/d718ee890b7cac02f94f412381982caf>, in > 12:43 server begin to receive all of the data in a window at once and sent > the updt packet to the client. > > Why the updt request halt for four seconds ? It seems server process too > much data *at once*, but why? > > -- > You received this message because you are subscribed to a topic in the > Google Groups "grpc.io" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/grpc-io/hR2g4hFvp3M/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/grpc-io/07626768-cf49-4670-9b8c-62da6112f523n%40googlegroups.com > <https://groups.google.com/d/msgid/grpc-io/07626768-cf49-4670-9b8c-62da6112f523n%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "grpc.io" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/grpc-io/CACs0FquT1DNn-iA9v0YxF6%3D-uRPQSnOantLiwQc7G6hX6NYCfA%40mail.gmail.com.
