Due to a known issue do not use JDK1.8.0_151 with WSO2 products. Use JDK 1.8.0_144 until JDK 1.8.0_162-ea is released.
This documentation is for WSO2 Message Broker version 3.2.0. For the latest documentation, see the documentation for WSO2 Enterprise Integrator.

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Per-message acknowledgment can be used to ensure that the subscriber client acknowledges each message that is received. Any message that is not acknowledged will go through the same process as when client acknowledged such as the message getting rejected. The subscriber can enable this feature by using one of the following options when creating the session.