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IJ25586: 'QFLOW: [ERROR] NETFLOW V9 FLOW SET <XX> HAS A LENGTH OF <XXXX> STARTING AT OFFSET <XXX>' BUFFER ERRORS IN QRADAR LOGGING

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APAR status

  • Closed as program error.

Error description

  • Changes have been made to the IPFIX code path to correctly
    handle padding at the end of flow sets.
    Netflow v9 records do not have these same changes, and
    therefore Netflow v9 errors similar to the following might be
    observed in /var/log/qradar.log:
    [QRADAR] [10831] qflow: [WARNING] default_Netflow: Missed 224
    flows from 127.0.0.1:6 (794335908,794336132)
    [QRADAR] [10831] qflow: [ERROR] NetFlow v9 flow set 0 has a
    length of 256 starting at offset 249 which exceeds the length
    of the buffer 250. Skipping flow set.
    [QRADAR] [10831] qflow: [ERROR] NetFlow v9 flow set 53 has a
    length of 47620 starting at offset 139 which exceeds the length
    of the buffer 140. Skipping flow set.
    [QRADAR] [10831] qflow: [ERROR] NetFlow v9 flow set 160 has a
    length of 256 starting at offset 127 which exceeds the length
    of the buffer 128. Skipping flow set.
    [QRADAR] [10831] qflow: [ERROR] NetFlow v9 flow set 0 has a
    length of 4416 starting at offset 139 which exceeds the length
    of the buffer 140. Skipping flow set.
    

Local fix

  • No workaround available.
    

Problem summary

  • This issue was fixed in QRadar QRM QVM release of 7.4.1 FixPack
    1 and 7.4.2.
    

Problem conclusion

  • This issue was fixed in QRadar QRM QVM release of 7.4.1 FixPack
    1 and 7.4.2.
    

Temporary fix

Comments

APAR Information

  • APAR number

    IJ25586

  • Reported component name

    QRADAR SOFTWARE

  • Reported component ID

    5725QRDSW

  • Reported release

    732

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2020-06-15

  • Closed date

    2020-11-27

  • Last modified date

    2020-11-27

  • 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

    QRADAR SOFTWARE

  • Fixed component ID

    5725QRDSW

Applicable component levels

[{"Line of Business":{"code":"LOB10","label":"Data and AI"},"Business Unit":{"code":"BU029","label":"Software"},"Product":{"code":"SSBQAC","label":"IBM QRadar SIEM"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"732"}]

Document Information

Modified date:
28 November 2020