INFO org.apache.http.impl.execchain.RetryExec - I/O exception (java.net.NoRouteToHostException) caught when processing

request to {}->https://example.com:443: No route to host (Host unreachable)

This error message indicates that the client is unable to establish a connection with the specified host. The NoRouteToHostException suggests that the host is not reachable, either because there is no network route to the host or because the host is down. The client may need to check the network connectivity and ensure that the specified host is up and running.