You can view the execution logs to better understand the execution process. The logs can help you locate and fix problems.
Log on to the Elastic Compute Service (ECS) console. Choose Maintenance & Monitoring > Operation Orchestration Service in the left-side navigation pane.
On the Executions tab, find the execution for which the execution logs need to be queried, and then click Details in the Actions column.
On the page that appears, click Execution Logs in the Basic Information section.