IBM Support

PI86249: IBMPROXY IS DOWN BY SIGSEGV.

Direct links to fixes

9.0.5-WS-EDGECP-FP00000051
9.0.4-WS-EDGECP-FP00000042
8.5.5-WS-EDGECP-FP000000122
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

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APAR status

  • Closed as program error.

Error description

  • ibmproxy is down by SIGSEGV.   Caching Proxy on AIX crashes at
    midnight when the Midnight directive is set to archive.so.
    

Local fix

  • disable archive.so fully by commenting out the following line
    in their /etc/ibmproxy.conf:
    #Midnight /usr/lib/archive.so:begin
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED:  Users of IBM Caching Proxy versions         *
    *                  8.5.5.12,                                   *
    *                  9.0.0.4, and 9.0.0.5 on AIX                 *
    ****************************************************************
    * PROBLEM DESCRIPTION: Caching Proxy crashes at midnight on    *
    *                      AIX                                     *
    *                      during log rotation.                    *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    With APAR PI76339, Caching Proxy changed to a different module
    loading system. The new module loading system was unable to the
    archive module which is used by the default Caching Proxy
    configuration to perform log rotation at midnight. This results
    in Caching Proxy on AIX crashing due to a segmentation fault
    each day at midnight.
    

Problem conclusion

  • The archive module was updated so that it can be loaded by
    Caching Proxy's new module loading system.
    
    The fix will be included in IBM Caching Proxy fixpacks:
    - 9.0.0.6
    - 8.5.5.13
    - 8.0.0.14
    

Temporary fix

  • There are two workarounds to resolve this issue.
    
    1. Use the old CP module loader system (SUGGESTED)
    The old module loading system can be used by setting the
    following environment variable before starting Caching Proxy:
    
    CP_USE_LOADANDINIT="true"
    export CP_USE_LOADANDINIT
    
    2. Disable the log rotation
    Log rotation can be disabled by commenting out the Midnight
    directive in the Caching Proxy config.
    
    The directive should look like this (after it is commented out):
    #Midnight /usr/lib/archive.so:begin
    

Comments

APAR Information

  • APAR number

    PI86249

  • Reported component name

    WEBS CACH PROXY

  • Reported component ID

    5724H8810

  • Reported release

    850

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2017-08-22

  • Closed date

    2017-09-14

  • Last modified date

    2017-09-14

  • 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 CACH PROXY

  • Fixed component ID

    5724H8810

Applicable component levels

  • R850 PSY

       UP

  • R900 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:
07 December 2021