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MF66512 - LIC-DB2MIRROR RDMA socket hang after link failure

PTF Cover Letter


PTF ( Program Temporary Fixes ) Cover letter


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Abstract

LIC-DB2MIRROR RDMA socket hang after link failure


Pre/Co-Requisite PTF / Fix List

REQ  LICENSED           PTF/FIX  LEVEL

TYPE PROGRAM  RELEASE   NUMBER   MIN/MAX  OPTION
---- -------- --------- -------  -------  ------
NONE



NOTICE:
-------
Application of this PTF may disable or render ineffective programs that
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APAR Error Description / Circumvention

-----------------------------------------------
When an RDMA link fails, a timing window may cause one or more
RDMA sockets using that link to hang rather than fail over to
another link.

CORRECTION FOR APAR MA47886 :
-----------------------------
Outstanding sends for the socket completed out of order with
some failing and some successful. While attempting to manage
retransmit of the failing sends, a flag was not managed
correctly because the failing and successful requests were
processed in separate tasks. The code has now been updated to
manage this flag correctly, allowing fail over to complete.

CIRCUMVENTION FOR APAR MA47886 :
--------------------------------
None.


Activation Instructions


None.




Special Instructions


None.


Default Instructions

THIS PTF CAN BE APPLIED IMMEDIATE OR DELAYED.



Supersedes

PTF/FIX NO(S).  APAR TITLE LINE
--------------  ------------------------------------------------------------
   MF66212      LIC-DB2MIRROR Deadlock Retrieving NRG Connections
   MF66189      LIC-DB2MIRROR RDMA socket hang on close
   MF66097      LIC-DB2MIRROR Add additional RDMA socket debug capability
   MF65996      LIC-COMM Db2 Mirror RDMA connection hang following RDMA link
   MF65760      LIC-COMM Db2 Mirror RDMA connection hang during connect

Summary Information

System..............................i
Models..............................
Release.............................V7R4M0
Licensed Program...............5770999
APAR Fixed..........................View details for APAR MA47886
Superseded by:......................View fix details for PTF MF99304
Recompile...........................N
Library.............................QSYS
MRI Feature ........................NONE
Cum Level...........................C9304740


IBM i Support

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Document Information

Modified date:
03 March 2021