There are two ways to set an offset to a port:
- Pass the port offset to the server during startup. The following command starts the server with the default port incremented by 3
- Set the Ports section of
Usually, when you offset the server's port, it automatically changes all ports it uses. However, there are few exceptions in the API Manager where you have to manually adjust some ports.
Changing the Thrift client and server ports
The port offset specified earlier in carbon.xml does not affect the ports of the Thrift client and server because Thrift is run as a separate server within WSO2 servers. Therefore, you must change the Thrift ports separately using
<ThriftServerPort> elements in the
<APIM_HOME>/repository/conf/api-manager.xml file. For example, the following configuration sets an offset of 2 to the default Thrift port, which is 10397:
When you run multiple instances of the API Manager in distributed mode, the Gateway and Key Manager (used for validation and authentication) can run on two different JVMs. When the API Gateway receives API invocation calls, it contacts the API Key Manager service for verification (given that caching is not enabled at the Gateway level). Communication between API Gateway and Key Manager happens in either of the following ways:
- Through a Web service call
- Through a Thrift call
The default communication mode is using Thrift. Assume that the Gateway port is offset by 2, Key Manager port by 5 and the default Thrift port is 10397. If the Thrift ports are changed by the offsets of Gateway and Key Manager, the Thrift client port (Gateway) will now be 10399 while the Thrift server port (Key Manager) will change to 10402. This causes communication between the Gateway and Key Manager to fail because the Thrift client and server ports are different.
To fix this, you must change the Thrift client and server ports of Gateway and Key Manager to the same value. In this case, the difference between the two offsets is 3, so you can either increase the default Thrift client port by 3 or else reduce the Thrift server port by 3.
Changing the offset of the Workflow Callback Service
The API Manager has a Service which listens for workflow callbacks. This service configuration can be found at
<AM_HOME>/repository/deployment/server/synapse-configs/default/proxy-services/WorkflowCallbackService.xml. Open this file and change the port value of the
<address uri> accordingly.
For a list of all default ports opened in WSO2 API Manager, see Default Product Ports.