The problem happened to me again even with keep-alive.
netstats suggests that underlying tcp connection is established.
Client thread dump follows:
java.lang.Thread.State: WAITING (parking)
at sun.misc.Unsafe.park(Native Method)
- parking to wait for <0x00007f1624000038> (a
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
at
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
at
java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
at
io.grpc.stub.ClientCalls$ThreadlessExecutor.waitAndDrain(ClientCalls.java:572)
at io.grpc.stub.ClientCalls.blockingUnaryCall(ClientCalls.java:120)
All server threads are idle. It is likely server receives no request.
On Wednesday, October 11, 2017 at 7:57:28 AM UTC-7, Taehyun Park wrote:
>
> This is what I did to avoid this problem in production. I wrapped all grpc
> calls with RxJava and used Retry to re-initialize channel when
> DEADLINE_EXCEEDED is thrown.
>
>
>
> On Tuesday, September 26, 2017 at 7:19:14 AM UTC+9, [email protected]
> wrote:
>>
>> Language: java
>> Version: 1.5
>>
>> I ran into weird issue multiple times recently: all RPCs from one client
>> failed with DEADLINE_EXCEEDED. From server log, it looks like these failed
>> requests didn't arrive at server at all. Other GRPC clients worked fine
>> during that time. The issue was fixed by restarting client application.
>> Keep-alive feature is not used in client. From my understanding, client
>> channel should manage the underlying connection properly even keep-alive is
>> off.
>> This issue happens occasionally and I haven't find a reliable way to
>> reproduce.
>>
>
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