IBM Support

IT18616: MFT transfer log contains message "BFGTR0077I" when using a protocol bridge agent

Subscribe

You can track all active APARs for this component.

 

APAR status

  • Closed as program error.

Error description

  • The destination file is deleted after successful transfer due to
    "BFGTR0077I: The destination agent was unable to determine the
    size of the file <file name> that it had written" exception when
    using a Protocol Bridge Agent to transfer a file to FTP server.
    If the source disposition for the managed transfer was set to
    "delete", then this also results in the source file being
    deleted.
    

Local fix

Problem summary

  • ****************************************************************
    USERS AFFECTED:
    This issue affects users of:
    
    - The MQ v7.5.0 Managed File Transfer component.
    - The MQ v8.0.0 Managed File Transfer component.
    - The MQ v9.0.0 Managed File Transfer component.
    
    who are transferring a file to a file server using a Protocol
    Bridge agent as a destination agent.
    
    
    Platforms affected:
    MultiPlatform
    
    ****************************************************************
    PROBLEM DESCRIPTION:
    When a Protocol Bridge Agent was acting as the destination agent
    for a managed transfer, it performed the following processing
    when transferring a file to a FTP Server:
    
    1. Connected to the FTP Server.
    2. Created a temporary file (destination file name with ".part"
    extension) on the FTP Server.
    3. Wrote the file data to the file system.
    4. Renamed the file (removing the ".part" extension).
    5. Disconnected from the FTP Server (this step unlocks the
    file).
    6. If the file data has been written successfully, and no errors
    have been thrown from the FTP Server:
        - Connected to the FTP Server to query the final size and
    last modified date of the file that has just been written.
        - Disconnected from the FTP Server.
    7. Else
        - Generated a "Failed" transfer progress message.
        - Published the progress message.
    
    In step 6, The transferred file could not be found to determine
    its size and last modified date therefore it reported file size
    as -2 and generated the following exception.
    "BFGTR0077I: The destination agent was unable to determine the
    size of the file '<filename>' that it had written."
    
    After it queried the file information, the agent performed
    checksum data verification (for example MD5) on the written
    file. However, during the checksum verification, it found the
    exception BFGTR0077 so it marked the transfer as failed, which
    caused a deletion of the file data that was written on the FTP
    Server.
    
    There are two possible reasons for the exception BFGTR0077 being
    generated:
    1. The file was no longer available on the file server because
    it was moved to another location after transfer.
    2. The listFormat attribute in the protocol bridge agent
    configuration was incorrect for the file server.
    
    The checksum data validation failed due to an incorrect list
    format therefore, the destination file was incorrectly deleted.
    However, the managed transfer still marked the transfer as
    successful because the file was written successfully and there
    was no error reported from the FTP server . If the source
    disposition for the managed transfer was set to "delete", then
    this would have also resulted in the source file being deleted.
    

Problem conclusion

  • The verification process of checksum data has been updated so
    that if the exception contains "BFGTR0077", it will keep the
    transfer of a file as successful and won't delete the file
    written on the destination.
    
    ---------------------------------------------------------------
    The fix is targeted for delivery in the following PTFs:
    
    Version    Maintenance Level
    v7.5       7.5.0.8
    v8.0       8.0.0.7
    v9.0 CD    9.0.3
    v9.0 LTS   9.0.0.2
    
    The latest available MQ maintenance can be obtained from
    'WebSphere MQ Recommended Fixes'
    http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27006037
    
    If the maintenance level is not yet available information on
    its planned availability can be found in 'WebSphere MQ
    Planned Maintenance Release Dates'
    http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27006309
    ---------------------------------------------------------------
    

Temporary fix

Comments

APAR Information

  • APAR number

    IT18616

  • Reported component name

    WMQ MFT

  • Reported component ID

    5724H7242

  • Reported release

    750

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    YesHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2016-12-30

  • Closed date

    2017-03-27

  • Last modified date

    2017-12-22

  • 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

    WMQ MFT

  • Fixed component ID

    5724H7242

Applicable component levels

  • R750 PSY

       UP

[{"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SSCUHLE","label":"WMQ Managed File Transfer"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"7.5","Edition":"","Line of Business":{"code":"","label":""}}]

Document Information

Modified date:
22 December 2017