An External Adapter Fails to Start

Issue: Your attempts to start an external adapter fail.

When attempting to run an external adapter an error message similar to the following appears:

Failed call to:https://<ESP hostname>:61308/RPC2 (Failed to read server's response: <ESP hostname>) java.io.IOException: Failed call to:https://<ESP hostname>:61308/RPC2 (Failed to read server's response: <ESP hostname>)

This error is an example of the Event Stream Processor server not being resolved.

Solution: Use the ping command to verify that the hostname of the server to which you are trying to connect can be resolved. If the hostname cannot be resolved:

Determine the IP address of the host on which the Event Stream Processor server is running. Run this command from that machine:
```
nslookup <hostname>
```
Add the following line to C:\Windows\System32\drivers\etc\hosts (Windows) or /etc/hosts (UNIX):
```
<ip-address-of-server-hostname>        <Server-hostname>
```