Ashish, can you give more detail on your usecase/requirement...Is your
requirement is to execute the function on all the nodes that host the
region? If thats the case, what is expected to happen by calling the
external service? Is only one node suppose to use the data/info from the
external service.
If your requirement is not to execute on all nodes; you can use the options
as suggested by Dan and Mike.

-Anil.



On Mon, Sep 16, 2019 at 10:55 AM Dan Smith <dsm...@pivotal.io> wrote:

> When you call FunctionService.onServer, you can pass it a ClientCache or a
> Pool. It will find a running server and execute on that. So you never pass
> it an individual server name.
>
> -Dan
>
> On Mon, Sep 16, 2019 at 10:22 AM Michael Stolz <mst...@pivotal.io> wrote:
>
>> If you execute onRegion withFilter and a single filter key it will only
>> be executed on the server who would host that key.
>>
>> --
>> Mike Stolz
>> Principal Engineer, Pivotal Cloud Cache
>> Mobile: +1-631-835-4771
>>
>>
>>
>> On Mon, Sep 16, 2019 at 12:49 PM aashish choudhary <
>> aashish.choudha...@gmail.com> wrote:
>>
>>> We use onRegion call to make http request to external service inside
>>> function. Because of that it gets executed on multiple servers. So
>>> basically we will have to make nested call to another function using
>>> onServer to avoid multiple calls? But what if that node is down?
>>>
>>> With best regards,
>>> Ashish
>>>
>>> On Mon, Sep 16, 2019, 9:59 PM Dan Smith <dsm...@pivotal.io> wrote:
>>>
>>>> Hi Ashish,
>>>>
>>>> How are you executing your function? If you execute a function from the
>>>> client with Function.onServer, it should only be executed on a single
>>>> running server.
>>>>
>>>> -Dan
>>>>
>>>

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