IBM Support

PH20448: IHS CRASH ON RESTART WHEN PLUGIN LOG ROTATION IS ENABLED

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APAR status

  • Closed as program error.

Error description

  • IHS will crash on a restart when the WAS PLugin is configured
    for Log rotation using piped logger.
    IHS error log might report
    crash like below :
    [Mon Dec 09 15:05:29.929585 2019]
    [was_ap24:notice] [pid 108389] [09/Dec/2019:15:05:29.92956]
    0001a765 b0003740 - DEBUG: ws_config: configDestroy: Destroyed
    the config
    *** Error in `/opt/WebSphere/HTTPServer/bin/httpd':
    double free or corruption (!prev): 0x0000000000b4b410
    ***
    ======= Backtrace: =========
    /lib64/libc.so.6(+0x816b9)[0x7f
    d0aeffa6b9]
    /opt/WebSphere/Plugins/bin/64bits/mod_was_ap24_http.
    so(logClose+0x29)[0x7fd0ad065cb7]
    /opt/WebSphere/Plugins/bin/64b
    its/mod_was_ap24_http.so(+0x2164d)[0x7fd0ad04064d]
    /opt/WebSpher
    e/HTTPServer/lib/libapr-1.so.0(+0x1ba1d)[0x7fd0afbc1a1d]
    /opt/We
    bSphere/HTTPServer/lib/libapr-1.so.0(apr_pool_clear+0x3e)[0x7fd0
    afbc266e]
    /opt/WebSphere/HTTPServer/bin/httpd(main+0x5db)[0x42cd
    4b]
    /lib64/libc.so.6(__libc_start_main+0xf5)[0x7fd0aef9b545]
    /op
    t/WebSphere/HTTPServer/bin/httpd(apr_bucket_mmap_make+0x61)[0x42
    ba49]
    ======= Memory map: ========
    00400000-0048a000 r-xp
    00000000 fd:0a 25503451
    /opt/WebSphere/HTTPServer/bin/httpd
    00589000-0058e000 rw-p
    00089000 fd:0a 25503451 /opt/WebSphere/HTTPServer/bin/httpd
    

Local fix

  • Workaround : Do a stop and start
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED:  All users of IBM WebSphere Application      *
    *                  Server                                      *
    ****************************************************************
    * PROBLEM DESCRIPTION: IHS crashes with Plugin log rotation    *
    *                      enabled                                 *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    IHS will crash if a restart is issued and the plugin is
    configured to use the IHS piped logger for log rotation
    

Problem conclusion

  • The plugin has been fixed to eliminate the situation causing
    the crash under these circumstances.
    
    The fix for this APAR is targeted for inclusion in fix pack
    8.5.5.17 & 9.0.5.3.  For more information, see
    'Recommended Updates for WebSphere Application Server':
    http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980
    

Temporary fix

Comments

APAR Information

  • APAR number

    PH20448

  • Reported component name

    WEBS APP SERV N

  • Reported component ID

    5724H8800

  • Reported release

    900

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2019-12-18

  • Closed date

    2020-02-12

  • Last modified date

    2020-02-12

  • 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 APP SERV N

  • Fixed component ID

    5724H8800

Applicable component levels



Document information

More support for: WebSphere Application Server
General

Software version: 900

Reference #: PH20448

Modified date: 12 February 2020