Oracle Linux and Oracle VM: Infiniband Connections Fail After Working Correctly "kernel: ibX: ipoib_cm_handle_tx_wc: failed cm @ send event (status=12, wrid=440 vend_err=81)" (Doc ID 1986044.1)

Last updated on AUGUST 16, 2017

Applies to:

Linux OS - Version Oracle Linux 5.0 and later
Oracle VM - Version 3.2.9 to 3.2.9 [Release OVM32]
Linux x86
Linux x86-64

Symptoms

After a period of error-free activity, the InfiniBand (IB) traffic slows to zero.  Examining the /var/log/messages file shows a flood of:

 alerts.

Rebooting the client does not correct the issue.

Changes

None

Cause

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