IBM Support

IT23379: PERFORMANCE ISSUE / HIGH CPU USAGE FOR FILENODES WITH SFTP TRANSPORT

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APAR status

  • Closed as program error.

Error description

  • IIB V10.0.0.3 or above and IIB V9.0.0.6 or above show
    performance degradation for message flows with FileInput nodes
    configured for SFTP transport.
    

Local fix

Problem summary

  • ****************************************************************
    USERS AFFECTED:
    All users of IBM Integration Bus V9.0.0.6 or above, V10.0.0.3 or
    above, and IBM App Connect Enterprise V11 using the FileNodes
    with SFTP transport.
    
    
    Platforms affected:
    z/OS, MultiPlatform
    
    ****************************************************************
    PROBLEM DESCRIPTION:
    IIB V10.0.0.3 or above, IIB V9.0.0.6 or above, and IBM App
    Connect Enterprise V11 show performance degradation for message
    flows with FileInput nodes configured for SFTP transport. This
    is caused by the change in key exchange algorithms used by the
    Jsch library version shipped with IIB installation.
    

Problem conclusion

  • The product now introduced an environment variable
    ''MQSI_FILENODES_SFTP_USE_JSCH150_OPTIONS', once this
    environment variable is set the Jsch libraries will proceed with
    the key exchange algorithm used in the previous versions of Jsch
    and it avoids the high CPU usage by the File node flows.
    
    ---------------------------------------------------------------
    The fix is targeted for delivery in the following PTFs:
    
    Version    Maintenance Level
    v10.0      10.0.0.14
    v11.0      11.0.0.2
    v9.0       9.0.0.11
    
    The latest available maintenance can be obtained from:
    http://www-01.ibm.com/support/docview.wss?rs=849&uid=swg27006041
    
    If the maintenance level is not yet available,information on
    its planned availability can be found on:
    http://www-1.ibm.com/support/docview.wss?rs=849&uid=swg27006308
    ---------------------------------------------------------------
    

Temporary fix

Comments

APAR Information

  • APAR number

    IT23379

  • Reported component name

    INTEGRATION BUS

  • Reported component ID

    5724J0530

  • Reported release

    900

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2017-12-05

  • Closed date

    2018-08-29

  • Last modified date

    2018-08-29

  • 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

    INTEGRATION BUS

  • Fixed component ID

    5724J0530

Applicable component levels

[{"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SSNQK6","label":"IBM Integration Bus"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"9.0","Edition":"","Line of Business":{"code":"LOB36","label":"IBM Automation"}}]

Document Information

Modified date:
29 August 2018