sorry for late reply, and making confusion, as you said, version was not
v1.0.0. based on master, commit 19ea0cffd7ba3df686ed05671f9ed35b8e9fa830.
about original question of me, I could connect all of my client correctly
with retry when grpc server returns UNAVAILABLE(=14). so now I think gRPC
runtime made acceptance limit in somewhere. that's correct?
2016年9月8日木曜日 2時19分27秒 UTC+9 Nicolas Noble:
>
> Can you describe which version of the code you're using ? This seems a bit
> odd, given we have stress testing in place that shows we can handle load,
> but I couldn't make sense of these line numbers in 1.0, so I am assuming
> you're on an older version.
>
> On Sunday, September 4, 2016 at 9:52:22 PM UTC-7, takehiro iyatomi wrote:
>>
>> hi, all.
>> I try to use gRPC C++ server as front end, that means it may accept huge
>> number of connection in short time.
>> so now I test its ability to process incoming connection. problem is, if
>> connection number increases, server drop connection (seems no accept
>> failure)
>>
>> detail description of environment:
>> host: OSX El Capitan (10.11.6), 16GB Mem, Intel Core i7 2.6GHz (8 core)
>> server: Sync mode gRPC C++ running in ubuntu 16.10 based container (just
>> copy server binary) with docker 1.12.0
>> client: gRPC nodeJS v0.12.7 running in host machine, all client run on
>> same nodejs process, with node-fibers
>>
>> each client has one instance of service object, which is created by
>> grpc.load(proto_file).package_name.service_name(); and send echo request to
>> server 1000 times, with ssl enabled.
>>
>> if number of connection < 100, it seems no problem. but above 200 clients
>> start to show error like following.
>> ```
>> E0905 13:26:29.887599000 123145305219072 handshake.c:128] Security
>> handshake failed:
>> {"created":"@1473049589.887582000","description":"Handshake read
>> failed","file":"../src/core/lib/security/transport/handshake.c","file_line":237,"referenced_errors":[{"created":"@1473049589.887580000","description":"FD
>>
>> shutdown","file":"../src/core/lib/iomgr/ev_poll_posix.c","file_line":427}]}
>> ```
>> at the same time server reports like this:
>> ```
>> E0905 04:26:29.998263585 491 handshake.c:128] Security
>> handshake failed:
>> {"created":"@1473049589.998250914","description":"Handshake read
>> failed","file":"src/core/lib/security/transport/handshake.c","file_line":237,"referenced_errors":[{"created":"@1473049589.988649722","description":"EOF","file":"src/core/lib/iomgr/tcp_posix.c","file_line":235}]}
>> ```
>>
>> increasing number of client, around 500, almost half of clients terminate
>> with error like above.
>> I try to change net.core.somaxconn to 1024 or 2048, because it seems to
>> change s_max_accept_queue_size also, but no help.
>> I also try to run server on host environment, but result is same.
>>
>> it may be a problem of my host's system setting, but currently I have no
>> idea. does anyone have some hint for this problem?
>> regards,
>>
>> Takehiro Iyatomi ([email protected])
>>
>>
>>
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