Query with retry in SAP Cloud SDK resilience

[shankarigr]

Hi,

I have a nestjs project which fetches business partners from s4hana cloud which is working fine. Now I wanted to implement a retry pattern to the existing code.

So, I added the below code

const response =  await businessPartnerApi.requestBuilder().getAll()
        .select(
              businessPartnerApi.schema.BUSINESS_PARTNER,
              businessPartnerApi.schema.FIRST_NAME,
              businessPartnerApi.schema.LAST_NAME
        ).top(5)
        .middleware(retry(4))
        .execute({
            url: '<url>'
         })
         .catch(error => {
                throw new HttpException(`Failed to get business partners - ${error.message}`, 500);
          });

I could see, in this case I am getting a timeout error after sometime.

If I replace retry with timeout, I am able to see the desired response. But with retry I am not. Can someone explain how this works and is there any code modifications required from my side?

Regards, Shankari G R

[tomfrenken]

Hi Shankari, we've documented the order in which the middelwares are executed here. Also, the retry increases the time between retries continuously, the 4th retry will already take around 8 seconds, which clashes with the default of the underlying HTTP client's timeout, which is 10 seconds.

Therefore, if you want to have 4 retries, you need to increase the timeout as well, I suggest you use our default resilience package for that.

[tomfrenken]

If this did not resolve your issue, feel free to re-open it.