[EMA C++] How to recover the subscription of market data when the statusmsg returns a Closed stre...

...am state?

The connection to the EED server is ok. However,the OnStatusMsg method shows that the stream state for each market data item is closed and I attempt to recover the subscription of each item. The result of the attempt is that the stream state is also closed. But when I reopen my application mannually, the stream state is ok. Can you tell me how to recover the subscription of market data when the OnStatusMsg returns a Closed stream state and why a reconnection to the EED server can solve that problem?

My OnStatusMsg method is as below.

3640-code.jpg

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Accepted answers

umer.nalla

Hi @zhouzhengxin

Can you confirm what value is reported for the StatusCode and StatusText? This may help understand the reason/cause of the close stream.

In terms of programmatic recovery, how soon after the Closed do you try to re-request the item? And if so, how many times do you try before abandoning?

It is usually good practice to wait a few seconds, before re-requesting and if making more than one retry attempt, wait a bit longer between each attempt - and then aborting the attempts after 2-3 attempts.

Also, just to confirm, are you actually connecting direct to the Elektron Edge Server (EED) or are you connecting via TREP i.e. ADS server?

All comments

umer.nalla

Hi @zhouzhengxin

Can you confirm what value is reported for the StatusCode and StatusText? This may help understand the reason/cause of the close stream.

In terms of programmatic recovery, how soon after the Closed do you try to re-request the item? And if so, how many times do you try before abandoning?

Also, just to confirm, are you actually connecting direct to the Elektron Edge Server (EED) or are you connecting via TREP i.e. ADS server?

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