IBM Support

IT10628: WHEN USING FIRST ALIVE DNS ON DATAPOWER, SOME DNS RESPONSES MAY BE INCORRECTLY IGNORED

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You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • When the Algorithm First-Alive on a DNS server is configured
    and the DNS server responds to a query with an additional RR
    (resource record) DataPower may disregard the Answer record
    response
    

Local fix

  • Consider a different load balance algorithm or configure the
    DNS server to no longer respond with additional RR.
    

Problem summary

  • Affected is DataPower use of DNS in configurations using DNS
    name resolution, with DNS using first-alive algorithm.
    
    
    When DataPower obtains a DNS response containing a zero-length
    response record, it will fail to parse the response, failing the
    corresponding hostname resolution. An example of such DNS
    responses are ones containing an empty EDNS0 extension record.
    

Problem conclusion

Temporary fix

Comments

APAR Information

  • APAR number

    IT10628

  • Reported component name

    DATAPOWER

  • Reported component ID

    DP1234567

  • Reported release

    601

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2015-08-11

  • Closed date

    2015-10-19

  • Last modified date

    2015-11-06

  • 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

    DATAPOWER

  • Fixed component ID

    DP1234567

Applicable component levels

  • R600 PSN

       UP

  • R601 PSN

       UP



Document information

More support for: IBM DataPower Gateways
General

Software version: 6.0.1

Reference #: IT10628

Modified date: 06 November 2015