IC74488: "I/O BAD REQUEST CHUNK <XXX>, PAGENUM <YYY>, PAGECNT 1" POSSIBLE ON INVALID ARCHIVE RESERVED PAGE

APAR status

• Closed as program error.

Error description

• You would see assertions at the end of an archive like this:
  
  11:34:04  Assert Warning: I/O bad request chunk -18634, pagenum
  1294917695, pagecnt 1
  11:34:04  IBM Informix Dynamic Server Version 11.50.TC4WE
  11:34:04   Who: Session(699, informix@host, 548, 00000000)
                  Thread(729, ontape, 0, 1)
  
  with write_arcinfo() in the stack as the function causing the
  assertion.
  
  Alternatively there might be HDR related assertions like this:
  
  13:45:20  DR: new type = primary, secondary server name =
  ol_cms2
  13:45:20  Assert Warning: I/O bad request chunk -18634, pagenum
  1294917695, pagecnt 1
  13:45:20  IBM Informix Dynamic Server Version 11.50.TC4WE
  13:45:20   Who: Session(14, informix@host, 0, 00000000)
                  Thread(42, onmode_mon, 0, 1)
  
  with dr_ll_write() in the stack as the function causing the
  assertion.
  

Local fix

• Restart the database server should cure the problem.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * Users of ontape, onbar, and HDR.                             *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * The server may assert with "Assert Warning: I/O bad request  *
  * chunk"  (1) at the end of a restore with ontape or onbar, or *
  * (2) during an HDR mode change.                               *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * Upgrade to version 11.50xC9 when available.                  *
  ****************************************************************
  

Problem conclusion

• The issue is resolved in version 11.50xC9.
  

Temporary fix

• Restart the server after the assertion.
  

Comments

APAR Information

• 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

  IBM IDS ENTRP E

• Fixed component ID

  5724L2304

Applicable component levels

• RB15 PSY

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