IBM Support

PI65683: EDGE LOAD BALANCER FOR IPV4 AND IPV6 HANG ON AIX

Fixes are available

9.0.0.2: WebSphere Application Server traditional V9.0 Fix Pack 2
8.5.5.11: WebSphere Application Server V8.5.5 Fix Pack 11
9.0.0.3: WebSphere Application Server traditional V9.0 Fix Pack 3
8.0.0.13: WebSphere Application Server V8.0 Fix Pack 13
9.0.0.4: WebSphere Application Server traditional V9.0 Fix Pack 4
8.5.5.12: WebSphere Application Server V8.5.5 Fix Pack 12
9.0.0.5: WebSphere Application Server traditional V9.0 Fix Pack 5
8.0.0.14: WebSphere Application Server V8.0 Fix Pack 14
9.0.0.6: WebSphere Application Server traditional V9.0 Fix Pack 6
8.5.5.13: WebSphere Application Server V8.5.5 Fix Pack 13
9.0.0.7: WebSphere Application Server traditional V9.0 Fix Pack 7
8.0.0.15: WebSphere Application Server V8.0 Fix Pack 15
9.0.0.8: WebSphere Application Server traditional V9.0 Fix Pack 8
8.5.5.14: WebSphere Application Server V8.5.5 Fix Pack 14
9.0.0.9: WebSphere Application Server traditional V9.0 Fix Pack 9
9.0.0.10: WebSphere Application Server traditional V9.0 Fix Pack 10
8.5.5.15: WebSphere Application Server V8.5.5 Fix Pack 15
9.0.0.11: WebSphere Application Server traditional V9.0 Fix Pack 11
9.0.5.0: WebSphere Application Server traditional Version 9.0.5 Refresh Pack
9.0.5.1: WebSphere Application Server traditional Version 9.0.5 Fix Pack 1
9.0.5.2: WebSphere Application Server traditional Version 9.0.5 Fix Pack 2
8.5.5.17: WebSphere Application Server V8.5.5 Fix Pack 17
9.0.5.3: WebSphere Application Server traditional Version 9.0.5 Fix Pack 3
9.0.5.4: WebSphere Application Server traditional Version 9.0.5 Fix Pack 4
9.0.5.5: WebSphere Application Server traditional Version 9.0.5 Fix Pack 5
WebSphere Application Server traditional 9.0.5.6
9.0.5.7: WebSphere Application Server traditional Version 9.0.5 Fix Pack 7
9.0.5.8: WebSphere Application Server traditional Version 9.0.5.8
8.5.5.20: WebSphere Application Server V8.5.5.20
8.5.5.18: WebSphere Application Server V8.5.5 Fix Pack 18
8.5.5.19: WebSphere Application Server V8.5.5 Fix Pack 19
9.0.5.9: WebSphere Application Server traditional Version 9.0.5.9
9.0.5.10: WebSphere Application Server traditional Version 9.0.5.10
8.5.5.16: WebSphere Application Server V8.5.5 Fix Pack 16
8.5.5.21: WebSphere Application Server V8.5.5.21
9.0.5.11: WebSphere Application Server traditional Version 9.0.5.11

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You can track all active APARs for this component.

 

APAR status

  • Closed as program error.

Error description

  • Edge Load Balancer for IPv4 and IPv6 hangs on AIX and stops
    forwarding packets
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:  IBM WebSphere Application Server Edge Load  *
    *                  Balancer for ipv4 and ipv6 on AIX           *
    ****************************************************************
    * PROBLEM DESCRIPTION: When using high availability function   *
    *                      on AIX, the product can become          *
    *                      nonresponsive and stop forwarding       *
    *                      packets.                                *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    The Load Balancer for ipv4 and ipv6 has some improper
    semaphore control on its AIX only version. This does not
    affect other operating systems.
    

Problem conclusion

  • Corrected the sempahore control on AIX for high availability
    to prevent the hang.
    
    Does not affect the product on any operating system other than
    AIX.
    
    Fix levels:
       8.0.0.13
       8.5.5.11
       9.0.0.2
    

Temporary fix

  • test fix provided to customer; issue does not occur often so may
    take a while to determine if problem completely resolved or not.
    

Comments

APAR Information

  • APAR number

    PI65683

  • Reported component name

    WEBS LOAD BALAN

  • Reported component ID

    5724H8811

  • Reported release

    850

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2016-07-11

  • Closed date

    2016-09-27

  • Last modified date

    2016-09-27

  • 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

    WEBS LOAD BALAN

  • Fixed component ID

    5724H8811

Applicable component levels

  • R800 PSY

       UP

[{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SSEQTP","label":"WebSphere Application Server"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"850","Line of Business":{"code":"LOB45","label":"Automation"}}]

Document Information

Modified date:
04 May 2022