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ainsley
2019-06-07 10:00:40 -05:00
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docs/developer/connecting/noecho.html
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<h1 id="turning-off-echod-messages"><a name="turning-off-echod-messages" class="plugin-anchor" href="#turning-off-echod-messages"><i class="fa fa-link" aria-hidden="true"></i></a>Turning Off Echo&apos;d Messages</h1>
<p>By default the server will echo messages. This means that if a publisher on a connection sends a message to a subject any subscribers on that same connection will receive the message. Turning off echo is a fairly new feature for the NATS server, but some of the clients already support it.</p>
<p>By default a NATS connection will echo messages if the connection also has interest in the published subject. This means that if a publisher on a connection sends a message to a subject any subscribers on that same connection will receive the message. Clients can opt to turn off this behavior, such that regardless of interest the message will not be delivered to subscribers on the same connection.</p>
<p>The NoEcho option can be useful in BUS patterns where all applications subscribe and publish to the same subject. Usually a publish represents a state change that the application already knows about, so in the case where the application publishes an update it does not need to process the update itself.</p>
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