Apigee REst Stream connection timeout after 5 mins

[ashishkumar16]

Hi, 

We have enabled the rest streaming by adding the following lines in Apigee proxy:

<HTTPTargetConnection>
  <LoadBalancer>
    <Server name="@target_server_name@"/>
  </LoadBalancer>
  <Path>/@target_endpoint@</Path>
  <Properties>
    <Property name="request.streaming.enabled">true</Property>
    <Property name="response.streaming.enabled">true</Property>
    <Property name="io.timeout.millis">120000</Property>
  </Properties>
</HTTPTargetConnection>

The issue is the connection is getting closed after 5 mins even if the stream is not finished.
This behavior is intermittent with different payload.
Can someone please help on this.