Stopping the receiver channel on a WebSphere MQ link

You can stop the receiver channel on a WebSphere® MQ link while leaving the link itself running.

Before you begin

Note: If you stop the receiver channel on a WebSphere MQ link, communication with the target IBM MQ network on that channel will cease for both point-to-point messaging and publishing and subscribing. Messages will be held at their transmission locations.

You might want to warn the administrator of the IBM MQ network that you are about to stop the channel.

About this task

If you stop a receiver channel, messages sent to the WebSphere MQ link engine are not received.

If a IBM MQ sender channel is started while an MQ link receiver channel is stopped, the request fails with an error indicating that the receiver channel is not available.

For more information about stopped states of the WebSphere MQ link and its channels, see Estados do Link do WebSphere MQ e seus Canais.

Procedure

  1. Start the administrative console.
  2. In the navigation pane, click Integração de serviços -> Barramentos -> bus_name -> [Topologia] Mecanismos do sistema de mensagens -> engine_name -> [Propriedades Adicionais] Links do IBM MQ -> link_name -> [Propriedades Adicionais] Canal receptor.
  3. Select the check box next to the channel you want to stop.
  4. In the Stop mode list, select Quiesce or Force.
  5. In the Target state list, select Inactive or Stopped.
  6. Click Stop.

Results

Stopping a receiver channel stops all the receiver channel connections for that receiver. The resultant state of the receiver channel, and the sender channel in the IBM MQ network with which it is communicating, depends on the options you choose:
Table 1. Stop modes. The table contains information about the target states and the corresponding stop modes for stopping the receiver channel on a WebSphere MQ link. There are two target states such as inactive and stopped, and there are two stop modes such as quiesce and force. The rows in the table represent the two target states, and the two stop modes are described in the two columns for each of the target state.
Target state Quiesce stop mode Force stop mode
Inactive The receiver channel moves to the stopping state and the data flow to the IBM MQ sender channel stops. When the IBM MQ sender channel next tries to communicate with the receiver channel the IBM MQ sender channel enters a state of retrying. The receiver channel then becomes inactive. The retrying IBM MQ sender channel then reestablishes a session with the receiver channel, and both channels become running. The receiver channel immediately becomes inactive. When the IBM MQ sender channel next tries to communicate with the receiver channel, the IBM MQ sender channel enters a state of retrying. The retrying IBM MQ sender channel then reestablishes a session with the receiver channel, and both channels become running.
Stopped The receiver channel moves to the stopping state and the data flow to the IBM MQ sender channel stops. When the IBM MQ sender channel next tries to communicate with the receiver channel the IBM MQ sender channel enters a state of retrying. The receiver channel then becomes stopped, so preventing the IBM MQ sender channel from reestablishing a session. The IBM MQ sender channel itself then becomes stopped. The receiver channel immediately becomes stopped. When the IBM MQ sender channel next tries to communicate with the receiver channel, the IBM MQ sender channel enters a state of retrying, and then becomes stopped itself.

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