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Oracle Linux: Infiniband HCA RDS Disconnection with High HCA rq_num_wrfe Counter Value (Doc ID 2995072.1)

Last updated on JANUARY 12, 2024

Applies to:

Linux OS - Version Oracle Linux 7.0 with Unbreakable Enterprise Kernel [3.8.13] and later
Linux x86-64


An Oracle Exadata system using Infiniband (IB) Host Channel Adapter (HCA) for network/storage connectivity experiences unexpected RDS disconnection.
When reviewing Exawatcher diagnostics, symptoms such as, though not limited to, the following are observed: 

1. Sudden increase in Infiniband HCA counter "rq_num_wrfe" values e.g.: 


5. Oracle Clusterware-induced node eviction.



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