PDPD process stops responding when memory usage exceeds 4GB on a Security Gateway

Product: Identity Awareness
Version: R81.20, R82, R82.10
OS: Gaia
Last Modified: 2026-07-23

Symptoms

• Users cannot authenticate through the Identity Awareness blade.

• Identity-based rules do not match the traffic.

• On the Security Gateway CLI, pdp commands return:

  daemon did not respond or not running

• The command ps aux |grep pdpd shows the PDPD process uses more than 4GB of memory (VSZ column).

• The last line in $FWDIR/log/pdpd.elg shows:

  Cannot allocate memory

• A forced restart of the PDPD process with the command kill -9 $(pidof pdpd) resolves the issue for a short time only.

Solution

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NOTE

This solution has been verified for the specific scenario, described by the combination of Product, Version and Symptoms. It may not work in other scenarios.

Article Properties

Access Level: Advanced
Status: Approved by TAC
Date Created: 2025-12-08
Last Modified: 2026-07-23