PowerFlex 4.x: MDM Trace Logs Flooded with INVALID_SESSION Events

Summary: MDM trace logs may show many INVALID_SESSION messages. These messages do not impact system performance or functionality, but can create excessive log noise.

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Symptoms

Scenario

  • MDM is connected to a PowerFlex Manager 4.x system
  • The PowerFlex Core system is on version 4.x

MDM trace logs show the following:

2025/08/11 10:15:14.823907 LOW:7fd7b05b7db0:authSession_GetSessionFromTokenForReadOrWrite:00260: Failed to get session - isWrite: 1, sessionIndex: 0, rc: INVALID_SESSION
2025/08/11 10:15:14.823913 LOW:7fd7b05b7db0:authMgr_GetUserInfoFromToken:00814: Failed to find session for authentication. rc=INVALID_SESSION
2025/08/11 10:15:14.823916 LOW:7fd7b05b7db0:cliMsg_AuthenticateSession:02080: Failed getting user role (INVALID_SESSION) authorized: 0

Impact

  • No functional issue, PowerFlex Gateway (GW) connections, and operations are unaffected.
  • Trace logs are heavily populated with this message, which may contribute to excessive log rotation and the possibility of missing other log entries.
  • No additional processing overhead; these messages do not introduce performance or latency issues for the MDM.
  • The message can be safely ignored from a functional perspective, but log noise may still be an operational consideration.

Cause

In version 4.x, the GW no longer uses session-based authentication when connecting to the MDM. Instead, it authenticates through a newer method that does not send session details.

The MDM, however, still contains legacy code (3.x) that attempts to look up a session for certain incoming requests. When no session is found (as expected for GW 4.x traffic), the MDM logs the INVALID_SESSION event, but the Gateway's request continues to be processed.

This log entry is not an error and does not indicate a problem with GW connectivity or authentication. It is a leftover behavior from older versions.

Resolution

Upgrade the system to a version that includes the fix.

Additional Information

Impacted Versions:

PowerFlex 4.x

Fixed In Version: 

PowerFlex 4.8

Affected Products

PowerFlex rack RCM Software
Article Properties
Article Number: 000355917
Article Type: Solution
Last Modified: 26 Sept 2025
Version:  3
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