# Driver session timeout The AEL daemon log may indicate that the “Server not found in Kerberos database” and the PDI client log may contain the following text: ``` 2020/01/22 13:33:00 - HiveSmokeTest - Finalizing execution: Driver Session Timeout Expired 2020/01/22 13:33:00 - Spoon - The transformation has finished!! ``` This issue occurs because the **websocketURL** property is not set to a fully qualified host name for the node running the AEL daemon. To resolve this issue, obtain the fully qualified host name by using the hostname command, as shown in the following example: ``` [devuser@hito31-n2 adaptive-execution]$ hostname -f hito31-n2.cs1cloud.internal ``` Then, set the resulting host name to the **websocketURL** property, as shown in the following example: ``` websocketURL=ws://hito31-n2.cs1cloud.internal:${ael.unencrypted.port} ``` --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.pentaho.com/install/9.3-install/pentaho-configuration/tasks-to-be-performed-by-an-it-administrator/set-up-the-adaptive-execution-layer-ael/troubleshooting-ael-cp/driver-timeout-and-deployment-errors-with-ael-on-secured-clusters-ael-troubleshooting/driver-session-timeout-ael-secured-cluster-errors-ael-troubleshooting.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.