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https://issues.apache.org/jira/browse/ARROW-7200?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16977508#comment-16977508
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Chengxin Ma commented on ARROW-7200:
------------------------------------
{{netstat}} shows:
{{tcp6 0 0 :::31337 :::* LISTEN
3831/./arrow-flight}}
(where {{arrow-flight}} is truncated from {{arrow-flight-perf-server}}).
This looks OK.
I checked the source code of the Flight benchmark, and it seems that the error
is returned from the {{DoGet}} method.
(https://github.com/apache/arrow/blob/master/cpp/src/arrow/flight/flight_benchmark.cc#L92)
If I set {{--test_put}} to be {{true}}, I would get the following error:
{{Failed with error: << IOError: Could not write record batch to stream:}}
The screenshot below shows the result of testing {{DoPut}} with and without the
server running.
!Screen Shot 2019-11-19 at 14.41.40.png!
Obviously the client is aware of the existence of the server, but somehow it
can't read from nor write to the server.
What could possible cause this problem?
PS: I also tried the Hello World example of gRPC
(https://grpc.io/docs/quickstart/cpp/) with some modification (changing
localhost to the remote one), and it worked well.
> Running Arrow Flight benchmark on two hosts doesn't work
> --------------------------------------------------------
>
> Key: ARROW-7200
> URL: https://issues.apache.org/jira/browse/ARROW-7200
> Project: Apache Arrow
> Issue Type: Bug
> Components: Benchmarking, C++, FlightRPC
> Affects Versions: 0.15.0, 0.15.1
> Environment: AWS EC2
> Instance type: t3a.xlarge
> AMI: ubuntu/images/hvm-ssd/ubuntu-bionic-18.04-amd64-server-20191002
> Number of instances: 2
> They are capable of pinging each other.
> Reporter: Chengxin Ma
> Priority: Major
> Attachments: Screen Shot 2019-11-18 at 16.00.38.png, Screen Shot
> 2019-11-19 at 14.41.40.png
>
>
> I was trying to evaluate the performance of Apache Arrow Flight on two hosts
> (one as the client and the other one as the server), using [the official
> benchmark|[https://github.com/apache/arrow/blob/master/cpp/src/arrow/flight/flight_benchmark.cc]].
> Flags I used to build the project were:
>
> {code:java}
> -DARROW_FLIGHT=ON
> -DCMAKE_BUILD_TYPE=Debug
> -DARROW_BUILD_BENCHMARKS=ON
> {code}
>
> The branch I used was maint-0.15.x since there was a build error on the
> master branch. _(The build error on master only existed in the environment
> where I set up two hosts: AWS. On my local environment (macOS) the build was
> successful on the master branch. I don't think this build error is relevant
> to the issue since there is no difference in the cpp source code.)_
> On the host acting as the server, I ran
> {code:java}
> ./arrow-flight-perf-server{code}
> On the host acting as the client, I ran
> {code:java}
> ./arrow-flight-benchmark --server_host ip-172-31-11-18{code}
> It gives the following error:
> {code:java}
> Failed with error: << IOError: gRPC returned unavailable error, with message:
> Connect Failed. Detail: Unavailable{code}
>
> If I ran
> {code:java}
> ./arrow-flight-benchmark --server_host ip-172-31-11-17{code}
> the error will be different:
> {code:java}
> IOError: Server was not available after 10 attempts{code}
> This is understandable since this host doesn't exist at all.
> This indicates that Flight is able to find the existing host
> (ip-172-31-11-18), but the communication somehow didn't succeed.
> The benchmark works fine if I run it with the localhost, either by not
> specifying the server_host flag or running the server in another process on
> the same host.
> I am not sure if the problem is in the environment or in the code itself.
> Could someone please give me some hint on how to resolve the problem?
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