PH40350: LOAD BALANCER EXECUTOR FAILS TO START ON LINUX POWERPC LE

APAR status

• Closed as program error.

Error description

• The executor fails to start on Linux Power systems using
  little endian.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:  IBM WebSphere Load Balancer for IPv4 and    *
  *                  IPv6 users on Linux ppcle                   *
  ****************************************************************
  * PROBLEM DESCRIPTION: When using the Load Balancer on Linux   *
  *                      ppcle, the executor may fail to         *
  *                      start.                                  *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  When running on Linux ppcle, the executor of the Load Balancer
  may fail to start. The lbexecutor.log file will indicate an
  error. Attempting to start the executor
  (/opt/IBM/WebSphere/Edge/ULB/servers/bin/ibmlb2), results
  in error.
  

Problem conclusion

• Prior to this code correction, IBM Advanced ToolChain version
  7.1 must be installed for the executor to load on Linux
  PowerPC LE. Higher levels of the toolchain would not resolve
  the error. The executor module stored the loader as the loader
  address used with the Advanced Toolchain 7.1. The
  /opt/at7.1/lib64/lb64.so.2 loader does not exist if Advanced
  Toolchain 7.1 is not installed. Thus the executor fails to load.
  
  With this code correction, the code has been corrected to
  store the system loader in the module (/lib64/lb64.so.2).
  However, if advanced toolcahin 7.1 is installed, the executor
  will not load. Advanced toolchain must be uninstalled or
  ungraded to version 12.0 or higher if it is required on the
  Load Balancer server.
  
  If Advanced toolchain 7.1 cannot be uninstalled due to
  non-Load Balancer dependencies, you must edit the
  lbexecutor.Linux script (located in
  /opt/IBM/WebSphere/Edge/ULB/servers/bin directory) after a
  fixpack is installed. Modify the start function in the script
  to specify using the Advanced toolchain 7.1 loaded:
  start() {
    if [ -x $LBBIN ] ; then
      echo Beginning run $( hostname ) $(date) > $LOG
      /opt/at7.1/lib64/ld64.so.2 $LBBIN >> $LOG 2>&1
  
  The loader location, "/opt/at7.1/lib64/ld64.so.2" is added
  before $LBBIN.
  
  Fix levels:
  8.5.5.22
  9.0.5.10
  

Temporary fix

• A tools called 'patchelf' can be used to modify the loader
  stored in the executor module. This tool is not an IBM
  provided tool but can be downloaded from the internet. Once
  installed, modify the executor module (ibmlb2) using the
  command:
  patchelf --set-interpreter /lib64/ld64.so.2
  /opt/IBM/WebSphere/Edge/ULB/servers/bin/ibmlb2
  

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