WSO2AM strange errors after successful startup

I have installed a fresh version of WSO2AM 3.2.0 by just extracting the downloaded ZIP file to /opt/wso2am/wso2am-3.2.0/. I have also set up two databases (db_am and db_shared) and I am using those in the file deployment.toml as described in the documentation. Then I'm starting the application by just executing the wso2server.sh script. It starts up just fine and the following lines appear, telling me that the application has started successfully.

TID: [-1234] [] [2020-10-26 15:59:14,710]  INFO {org.wso2.carbon.core.internal.StartupFinalizerServiceComponent} - Server           :  WSO2 API Manager-3.2.0                                
TID: [-1234] [] [2020-10-26 15:59:14,717]  INFO {org.wso2.carbon.core.internal.StartupFinalizerServiceComponent} - WSO2 Carbon started in 53 sec                                             
TID: [-1] [] [2020-10-26 15:59:14,776]  INFO {org.wso2.carbon.databridge.core.DataBridge} - user admin connected

But right after that it gives me the following errors:

TID: [-1234] [] [2020-10-26 15:59:15,600] ERROR {org.wso2.carbon.user.core.common.AbstractUserStoreManager} - java.lang.NumberFormatException: For input string: "q0MHWf0UB+WyZD03ES/pzA=="  
TID: [-1234] [internal/data/v1] [2020-10-26 15:59:15,903] ERROR {org.wso2.carbon.user.core.common.AbstractUserStoreManager} - java.lang.NumberFormatException: For input string: "q0MHWf0UB+WyZD03ES/pzA=="
TID: [-1234] [internal/data/v1] [2020-10-26 15:59:15,903] ERROR {org.wso2.carbon.user.core.common.AbstractUserStoreManager} - java.lang.NumberFormatException: For input string: "q0MHWf0UB+WyZD03ES/pzA=="
TID: [-1234] [internal/data/v1] [2020-10-26 15:59:15,932] ERROR {org.wso2.carbon.user.core.common.AbstractUserStoreManager} - java.lang.NumberFormatException: For input string: "q0MHWf0UB+WyZD03ES/pzA=="
TID: [-1234] [internal/data/v1] [2020-10-26 15:59:15,933] ERROR {org.wso2.carbon.user.core.common.AbstractUserStoreManager} - java.lang.NumberFormatException: For input string: "q0MHWf0UB+WyZD03ES/pzA=="
TID: [-1234] [internal/data/v1] [2020-10-26 15:59:15,933] ERROR {org.wso2.carbon.user.core.common.AbstractUserStoreManager} - java.lang.NumberFormatException: For input string: "q0MHWf0UB+WyZD03ES/pzA=="
TID: [-1] [] [2020-10-26 15:59:15,651] ERROR {org.wso2.carbon.databridge.agent.endpoint.DataEndpointConnectionWorker} - Error while trying to connect to the endpoint. Cannot borrow client for ssl://<the servers local ip>:9711. org.wso2.carbon.databridge.agent.exception.DataEndpointLoginException: Cannot borrow client for ssl://<the servers local ip>:9711.                                            
        at org.wso2.carbon.databridge.agent.endpoint.DataEndpointConnectionWorker.connect(DataEndpointConnectionWorker.java:145)                                                             
        at org.wso2.carbon.databridge.agent.endpoint.DataEndpointConnectionWorker.run(DataEndpointConnectionWorker.java:59)                                                                  
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)
Caused by: org.wso2.carbon.databridge.agent.exception.DataEndpointLoginException: Error while trying to login to data receiver :/<the servers local ip>:9711                                            
        at org.wso2.carbon.databridge.agent.endpoint.binary.BinaryDataEndpoint.login(BinaryDataEndpoint.java:50)                                                                             
        at org.wso2.carbon.databridge.agent.endpoint.DataEndpointConnectionWorker.connect(DataEndpointConnectionWorker.java:139)                                                             
        ... 6 more
Caused by: org.wso2.carbon.databridge.commons.exception.AuthenticationException: org.wso2.carbon.identity.base.IdentityRuntimeException: com.mysql.cj.jdbc.exceptions.CommunicationsException: Communications link failure

The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.

Those lines then repeat indefinitely. I really don't understand where those errors are coming from.

• The string from the first few errors looks like a password or a token but I have not set this string anywhere in the config.
• The other errors, telling me about borrowing some client don't make any more sense to me

Where do these errors come from and how could I fix them or even find out what is causing them?

For the database issue Check whether your database server is up and running and your database configs are correctly configured in deployment.toml(username, password, URL, port) and you have run the correct MySQL scripts to your databases as in the docs. (Also don't forget to include the JDBC driver)

ex: deployment.toml configs

[database.shared_db]
type = "mysql"
url = "jdbc:mysql://localhost:3306/shared_db?useSSL=false"
username = "root"
password = "admin"

Check whether port 9711 is opened on a different network interface instead of your <the servers local ip>. You can verify this by executing the following command.

   sudo lsof -i -P -n

If it is open to another network interface then close that port and
then start the APIM server again.

Or else you can change the APIM configs to configure a new port.

[[apim.throttling.url_group]]
traffic_manager_urls = ["tcp://<server_ip>:<port>","tcp://<server_ip>:<port>"]
traffic_manager_auth_urls = ["ssl://<server_ip>:<port>","ssl://<server_ip>:<port>"]
type = "failover"

An example configuration is given below.

[[apim.throttling.url_group]]
traffic_manager_urls = ["tcp://localhost:9611","tcp://localhost:9611"]
traffic_manager_auth_urls = ["ssl://localhost:9711","ssl://localhost:9711"]
type = "failover"