In 1.3 we started allowing clients to be more aggressive. From the 1.3 release notes:
"Keepalives in Netty and OkHttp now allow sending pings without outstanding
RPCs. The minimum keepalive time was also reduced from 1 minute to 10
seconds. Clients must get permission from the services they use before
enabling keepalive."
However, that puts servers in danger, so we also added server-side
detection of over-zealous clients. In the release notes:
"Netty server: now detects overly aggressive keepalives from clients, with
configurable limits. Defaults to permitting keepalives every 5 minutes only
while there are outstanding RPCs, but clients must not depend on this
value."
too_many_pings is the server saying the client is pinging too frequently.
Either reduce the keepalive rate on the client-side or increase the limit
on the server-side.
On Mon, Jun 5, 2017 at 2:51 PM, <cr2...@gmail.com> wrote:
>
> Hi
>
> I set on a grpc stream with NettyChannel options:
> keepAliveTime"(60L, TimeUnit.SECONDS});
> keepAliveTimeout{8L, TimeUnit.SECONDS});
>
> At times in the code I've added sleep for 15 min. I see on Wireshark the
> keep alives.
>
> But after a time I see :
> ------------------------------------------------------------
> ------------------------------------------------------------
> -----------------
> Jun 05, 2017 5:29:53 PM io.grpc.netty.NettyClientHandler$1
> onGoAwayReceived
> WARNING: Received GOAWAY with ENHANCE_YOUR_CALM. Debug data: {1}
> Jun 05, 2017 5:29:53 PM io.grpc.internal.AtomicBackoff$State backoff
> WARNING: Increased keepalive time nanos to 240,000,000,000
> 2017-06-05 21:29:53,073 ERROR OrdererClient:116 - Received error on
> channel foo, orderer orderer.example.com, url grpc://localhost:7050,
> RESOURCE_EXHAUSTED: Bandwidth exhausted
> HTTP/2 error code: ENHANCE_YOUR_CALM
> Received Goaway
> too_many_pings
> io.grpc.StatusRuntimeException: RESOURCE_EXHAUSTED: Bandwidth exhausted
> HTTP/2 error code: ENHANCE_YOUR_CALM
> Received Goaway
> too_many_pings
> at io.grpc.Status.asRuntimeException(Status.java:540)
> at io.grpc.stub.ClientCalls$StreamObserverToCallListenerAd
> apter.onClose(ClientCalls.java:392)
> at io.grpc.internal.ClientCallImpl.closeObserver(
> ClientCallImpl.java:426)
> at io.grpc.internal.ClientCallImpl.access$100(
> ClientCallImpl.java:76)
> at io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl.
> close(ClientCallImpl.java:512)
> at io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl.
> access$700(ClientCallImpl.java:429)
> at io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl$
> 1StreamClosed.runInContext(ClientCallImpl.java:544)
> at io.grpc.internal.ContextRunnable.run(ContextRunnable.java:52)
> at io.grpc.internal.SerializingExecutor.run(
> SerializingExecutor.java:117)
> at java.util.concurrent.ThreadPoolExecutor.runWorker(
> ThreadPoolExecutor.java:1142)
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(
> ThreadPoolExecutor.java:617)
> at java.lang.Thread.run(Thread.java:745)
> ------------------------------------------------------------
> ------------------------------------------------------------
> -----------------
>
> But everything seem to continue to work grpc 1.3.0
> Something I can do to stop that ? Any ideas whats going on here ?
> Thanks!
>
>
>
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