To clarify your issue, you're running Streams applications on a v4.3 install and you're seeing frequent timeout errors from the application logs. Is this correct?
If so, which toolkits are you using?
Connection parameters will differ for each toolkit and you will need to check the documentation for the toolkit you're using to see if that can be configured.
It could also be an issue with the cloud services you're using.
You mentioned WML (Watson Machine Learning). If you are using the Watson Machine Learning service in IBM Cloud, double check that the endpoint you are using is for the region closest to you. See the WML documentation for a list of endpoints: https://cloud.ibm.com/apidocs/machine-learning
Since this is happening with multiple toolkits, there could also be an underlying network issue, such as a problem with the connection.
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