F11: Publisher Image Timeout

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in TREP Infrastructure

Subscribing from TREP and getting this message. What does the error message means ? Who exactly is timing out?

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Best Answer

  • Jirapongse
    Jirapongse admin
    Answer ✓

    From the information from TREP support team, this issue only occurs with ADH 3.0.x and ADH 3.1.0 and is fixed in ADH 3.1.1.

    The problem was addressed in this technical bulletin.

    BACKGROUND

    When utilizing Non-Interactive publishers (cacheType=sourceDriven), ADH has the ability to send a Blank Image response
    as a placeholder for items that have yet to be published. When the real item is actually published, ADH passes the new data
    to the subscribers (no re-subscription necessary).

    Under proper operating conditions, if no real data is published, this Blank Image remains in cache for the duration of
    ageUnwatchedItemTime and is then closed sending the following to any Subscribers: 

    F11: Publisher Image Timeout

    There is a problem with ADH 3.0.x and ADH 3.1.0 where subsequent requests for an item that already has a Blank Image
    results in the item being closed immediately – independent of the aging timer. All data streams for this unpublished item are
    closed and the users no longer receive the real data once published without re-subscription. This greatly diminishes the
    benefit of the Blank Image creation.

    Note: This problem does not occur in ADH 2.6.x.

    SOLUTION

    This issue is fixed in ADH 3.1.1. Clients utilizing the blank image functionality should use ADH 3.1.1.

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