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IV58454: BACKUP BY NAME DOESN'T STOP ON READ ERRORS APPLIES TO AIX 7100-03

A fix is available

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You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • When backbyname encounter read errors on files while it
    already started backing up the file. It doesn't exit, it
    continue to loop in read for the supposed remaining bytes
    thus continue to output the same error, for the same file
    for each input blocs it try to read that fail.
    The resulting backup will contain the begining of the
    input file followed by zeros up to the end of the file
    size that was computed before the file went in error.
    This can occurs for example when backing up from an nfs
    filesystem, and a file is removed from the nfs server.
    In that case backbyname will output the following errors
    in loop :
    backup: 0511-076 Cannot read the specified file.
    ./bigfile: A file, file system or message queue is no
    longer available.
    backup: 0511-076 Cannot read the specified file.
    ./bigfile: A file, file system or message queue is no
    longer available.
    etc...
    

Local fix

Problem summary

  • When backbyname encounters read errors on file while it
    already started backing up, it continues
    to loop in read for the supposed remaining bytes
    thus continue to output the same error, for the same file
    for each input blocks it try to read that fails.
    This results in too many error messages making it difficult
    to analyze and determine what went wrong.
    

Problem conclusion

  • backbyname will now print only one error message per file
    for the read errors if any encountered during the backup
    of that file.
    

Temporary fix

Comments

  • 6100-07 - use AIX APAR IV54181
    6100-08 - use AIX APAR IV58652
    6100-09 - use AIX APAR IV58485
    6100-09 - use AIX APAR IV58485
    6100-09 - use AIX APAR IV58485
    7100-01 - use AIX APAR IV58607
    7100-02 - use AIX APAR IV58581
    7100-03 - use AIX APAR IV58454
    7100-04 - use AIX APAR IV58541
    

APAR Information

  • APAR number

    IV58454

  • Reported component name

    AIX V7.1

  • Reported component ID

    5765H4000

  • Reported release

    710

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Submitted date

    2014-04-01

  • Closed date

    2014-04-01

  • Last modified date

    2016-05-10

  • APAR is sysrouted FROM one or more of the following:

    IV54181

  • APAR is sysrouted TO one or more of the following:

Fix information

  • Fixed component name

    AIX V7.1

  • Fixed component ID

    5765H4000

Applicable component levels

  • R710 PSY U853960

       UP14/05/22 I 1000

PTF to Fileset Mapping



Document information

More support for: AIX Enterprise Edition

Software version: 710

Operating system(s): AIX

Reference #: IV58454

Modified date: 10 May 2016