PH37311: CRASH MAY OCCUR ON AIX WITH ROCE CONVERGED NETWORK ADAPTER

APAR status

• Closed as program error.

Error description

• Crash stack contains entcore_tx_send and entcore_tx_enqueue at
  the top of the stack and contains LB functions os_packetxmit,
  lbarp_send, lbarp_entry on the call stack.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:  WebSphere Application Server Load Balancer  *
  *                  users                                       *
  ****************************************************************
  * PROBLEM DESCRIPTION: When using RoCE Converged Network card  *
  *                      on AIX systems with the load            *
  *                      balancer, the system can crash.         *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  A crash can occur when using the load balancer on AIX with the
  RoCE converged network adapter. The crash occurs when the load
  balancer is responding to an arp request for a defined cluster
  or return address. If the load balancer is configured with
  LB_PROMISCOUS, this crash will not occur. LB_PROMISCOUS
  instructions are provided in apar PI84915.
  

Problem conclusion

• The crash occurs because available kernel stack space is
  consumed by the network driver and the load balancer executor
  module.  Code has been corrected to reduce stack space usage
  by the load balancer.
  
  Fix levels:
     8.5.5.20
     9.0.5.9
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

Fix information

• Fixed component name

  WS EDGE LB IPV4

• Fixed component ID

  5724H8812

Applicable component levels