dcom call thru asp invoked dll takes 2 minutes before ack. response

Discussion in 'ASP General' started by Lori Reddy, Jan 8, 2004.

  1. Lori Reddy

    Lori Reddy Guest

    Here are the variables left by the time we found a
    workaround for the problem:
    Across subnet.
    Across firewall.
    DCOM call from a DLL used in an ASP page.

    Two tests from a web server ("a") to another server ("b")
    over the firewall and subnet:

    First test ran a simple ASP page that created an object of
    a local COM DLL. The local COM DLL then performed a DCOM
    call to server a. Network Monitoring revealed a quick
    response from server b back to the web server without
    acknowledgement. A subsequent response approximately two
    minutes later from server b was finally acknowledged by
    server a. (Failure - takes too long because it should have
    ackowledged the first response)

    Second test ran a simple windows application that created
    an object of a local COM DLL. The local COM DLL then
    performed a DCOM call to server b. Network Monitoring
    revealed a quick response from server b back to server a
    with immediate acknowledgement. (Success - acknowledged
    the first response)

    Workaround:
    Created local COM EXE with code from local COM DLL.
    Ran first test creating new object of the local COM EXE
    instead of the local COM DLL. (Success - the COM EXE
    acknowledged the first response from server b)

    Does IIS intercept all communication produced from it's
    DLLHost.exes? Any other ideas as to what the root cause
    of this problem may be????
     
    Lori Reddy, Jan 8, 2004
    #1
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