Which three log files should be reviewed to troubleshoot a failed code upgrade?

To diagnose and troubleshoot a failed code upgrade or lifecycle management (LCM) failure in a VxRail cluster, an implementation engineer must examine the dedicated log files residing on the VxRail Manager virtual appliance within the /var/log/mystic/ file path. The three critical logs for this process are marvin.log, lcm-web.log, and lcm-do.log.

marvin.log captures the overarching operational state of the VxRail Manager, tracking graphical user interface interactions, background thread allocations, and core API request dispatches. lcm-web.log explicitly records the web service requests, session states, and payloads entering the lifecycle management web endpoint. Crucially, lcm-do.log (Lifecycle Management Director) is the definitive execution log that tracks the actual orchestration steps, pre-checks, and command sequences dispatched to individual ESXi hosts and component microcode update subsystems. When a composite upgrade fails, lcm-do.log will reveal the exact step, script, or component upgrade verification threshold that triggered the error or timeout. Conversely, loudmouth.log handles localized IPv6 multicast node discovery and plays no functional role in tracking ongoing orchestration or patch execution pipelines.