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IT06889: APPLIANCE MIGHT IMMEDIATELY RESTART WHEN DNS USES TCP AND A REQUEST TIMES OUT

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You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • When a DNS query returns a response larger than a single UDP
    packet, TCP will be used for resolution instead.  If the request
    times out it is possible an unexpected immediate restart will
    occur.
    

Local fix

Problem summary

  • Affected are DataPower installations using DNS with round-robin
    algorithm, connected to an incorrectly configured server.  When
    the DNS server response does not fit in DNS packet, DataPower
    DNS client retries the query via TCP as expected.  If that query
    times out for any reason, the appliance might restart,
    generating a backtrace.
    

Problem conclusion

Temporary fix

Comments

APAR Information

  • APAR number

    IT06889

  • Reported component name

    DATAPOWER

  • Reported component ID

    DP1234567

  • Reported release

    500

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2015-02-02

  • Closed date

    2015-03-20

  • Last modified date

    2015-05-04

  • 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

  • R700 PSN

       UP

  • R710 PSN

       UP



Document information

More support for: IBM DataPower Gateways
General

Software version: 5.0.0

Reference #: IT06889

Modified date: 04 May 2015