Resend Request (35=2)

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Imported from previous forum

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[ original email was from binaya patel - binayakumar.patel@wipro.com ]
Hi,

I have some concern about the Resend Request. I know that whenever there is a High Sequence Number issue, then system sends a Resend Request Message, but can we send a Resend Request message when there is no High Sequence number issue. Please look into the below scenario.

Suppose for e.g. Client’s inbound sequence Number =100 and Outbound Sequence Number is 100.

Similarly broker inbound sequence Number =100 and Outbound Sequence Number is 100. (Both are in Sync).

There is no sequence number issue in this communication, but still client wants to send Resend Request message from BeginSeqNum(7) = 50 to EndSeqNum(16) = 90.

  1. Can it be possible to send a resend request from client side?

  2. If yes, then what will be the response messages from the counter party? And how Client will manage if any Sequence Reset-GapFill messages comes?

Thanks & Regards
Binayakumar Patel

3

Hi Binayakumar,

I misunderstood your question, are you saying that client send Resend Request (7) = 50 to (16) = 90 while both inbound and outbound are synchronised in=100 and out=100? What happen with the the sequence 91,92…99? As you have mentioned Resend Request is send only to initiate the retransmission of messages, if there is a sequence number gap detected.
If they have received 91,92…99 Then they should send a Resend Request 7=50 and 16=100 or even 16=0. My advice 16=0 this will allow a fast recovery.

Hope this help

Joel

Hi,

I have some concern about the Resend Request. I know that whenever there
is a High Sequence Number issue, then system sends a Resend Request
Message, but can we send a Resend Request message when there is no High
Sequence number issue. Please look into the below scenario.

Suppose for e.g. Client’s inbound sequence Number =100 and Outbound
Sequence Number is 100.

Similarly broker inbound sequence Number =100 and Outbound Sequence
Number is 100. (Both are in Sync).

There is no sequence number issue in this communication, but still
client wants to send Resend Request message from BeginSeqNum(7) = 50 to
EndSeqNum(16) = 90.

  1. Can it be possible to send a resend request from client side?

  2. If yes, then what will be the response messages from the counter
    party? And how Client will manage if any Sequence Reset-GapFill
    messages comes?

Thanks & Regards Binayakumar Patel