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Peer Congestion Event Type: Credit Stall(2) for Port 50060e800xxxx

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san
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Applies to

Brocade switch 

Issue

  • Servers in a cluster repeatedly log messages like the following:
May  2 10:15:15 zirconium1 kernel: qla2xxx [0000:0f:00.0]-5098:0:Peer Congestion Event Type: Credit Stall(2) for Port 50060e800879xxx
May  2 10:15:15 zirconium2 kernel: qla2xxx[0000:0f:00.0]-5098:0: Peer Congestion Event Type: Credit Stall(2) for Port 50060e800879fxxx
  • Switch health report shows healthy:
Switch Health Report:
Current Switch Policy Status: HEALTHY
 
Category                 |Today                     |Last 7 days               |
--------------------------------------------------------------------------------
Fabric Performance Impact|Out of operating range    |Out of operating range    |
IO Latency               |Out of operating range    |Out of operating range    |
 
Stats(Units)        Current     04/25/23    04/24/23    04/21/23    04/13/23    04/12/23    04/07/23
----------------------------------------------------------------------------------------------------
ITW(ITWs)           -           11/45(13)   -           -           -           -           -
LOSS_SYNC(SyncLoss) -           -           -           -           -           -           -
LF(LFs)             -           -           -           3/24(7)     4/12(1)     4/12(1)     3/0(1)
-           -           -           3/25(3)     4/13(1)     4/13(1)     -
-           -           -           3/27(3)     4/14(1)     4/14(1)     -
 
  • No performance impact was observed on the switch side
  • When the connection to the affected port was moved to another port, the errors stopped.
  • No issue was found when the port connected to the server/storage was investigated. 

 

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