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PH01352: HIGH CPU IN SERVERS WHEN TCPIP IS SHUT DOWN

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You can track all active APARs for this component.

 

APAR status

  • Closed as program error.

Error description

  • High CPU is seen in the DMGR/AppServer control regions and
    node
    agent when the TCPIP address space is shut down when using
    Java
    8.  A trace shows this message over and over:
    
    Trace: 2018/07/10 15:05:31.772 02 t=8C6690 c=UNK key=S2 tag=
    (13007004)
    SourceId: com.ibm.son.mesh.Peer
    ExtendedMessage: UDP: IOException occured. Message ignored.
    java.net.SocketException: EDC5122I Input/output error.
    (errno2=0x75E00381)
    
    Using java 6, you only see this error:
    Exception in thread "com.ibm.son.mesh.Peer-tcp-port-6007"
    java.lang.Error: java.net.SocketException: EDC5122I
    Input/output error.
    (errno2=0x749B7308)
    
    So it appears java 8 is returning a different exception that
    the WAS code needs to handle differently.
    

Local fix

  • stop the servers before TCPIP is stopped
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED:  All users of IBM WebSphere Application      *
    *                  Server WAS zOS Base- Virtual Enterprise/IM  *
    *                  Component                                   *
    ****************************************************************
    * PROBLEM DESCRIPTION: High cpu usage is seen in control       *
    *                      regions when the TCPICP address space   *
    *                      is terminated by use of the FORCE       *
    *                      command.                                *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    When running Java 8, a high cpu condition occurs in the control
    regions when the TCPICP address space is terminated by use of
    the FORCE command. Trace logs will also contain the IOException
    below repetitively:
    -
    Trace: 2018/07/10 15:05:31.772 02 t=8C6690 c=UNK key=S2
    tag=(13007004)
    SourceId: com.ibm.son.mesh.Peer
    ExtendedMessage: UDP: IOException occured. Message ignored.
    java.net.SocketException: EDC5122I Input/output error.
    (errno2=0x75E00381)
    

Problem conclusion

  • The Peer-to-peer Service Overlay Network (P2P/SON) component was
    altered to handle the forceful termination of the TCPICP address
    space without incurring a high cpu condition.
    
    The fix for this APAR is currently targeted for inclusion in fix
    packs 8.5.5.15 and 9.0.0.9.  Please refer to the Recommended
    Updates page for delivery information:
    http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980
    

Temporary fix

Comments

APAR Information

  • APAR number

    PH01352

  • Reported component name

    WEBSPHERE FOR Z

  • Reported component ID

    5655I3500

  • Reported release

    900

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2018-08-03

  • Closed date

    2018-09-10

  • Last modified date

    2018-09-10

  • 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

    WEBSPHERE FOR Z

  • Fixed component ID

    5655I3500

Applicable component levels

  • R900 PSY

       UP

[{"Business Unit":{"code":"BU053","label":"Cloud \u0026 Data Platform"},"Product":{"code":"SS7K4U","label":"WebSphere Application Server for z\/OS"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"900","Line of Business":{"code":"LOB36","label":"IBM Automation"}}]

Document Information

Modified date:
17 October 2021