VCG on version 6.0.0.1 experiencing a Dataplane Service failure

Products

• VMware VeloCloud SD-WAN

Issue/Introduction

A Gateway may experience a Dataplane Service failure, generate a core, and restart to restore functionality.

Environment

VCGs on 6.0.0.1 that has and edge connected with wireless link and Dynamic Bandwidth Adjustment feature is enabled

Cause

Bug #151287: When Dynamic Bandwidth Adjustment feature is enabled on a wireless link on an Edge, the feature code on the Edge and the Gateway work in tandem to determine the real time bandwidth of the wireless link. It is possible that multiple threads on the Gateway get into a race condition in which they try to access the feature data and some other shared data at the same time, and they are blocked from executing because they each hold a lock to the data the others are waiting for. This results in the Gateway Dataplane Service being terminated due to SIGXCPU.

Resolution

Fix is available in versions 6.0.0.2 and 6.1.0.0

Workaround: Disable Dynamic Bandwidth Adjustment feature on the wireless links that are connected to the Gateway.