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Informix - Problem description

Problem IT31725 Status: Closed

"CANNOT UPDATE PAGEZERO" ERRORS WHILE UPGRADING FROM PRE-12.10.XC8 TO
14.10 LEAVING PAGEZERO IN A DUBIOUS STATE

product:
INFORMIX SERVER / 5725A3900 / E10 - 
Problem description:
Upgrading an instance from a version before 12.10.xC8 to 14.10
will modify pagezero's initial slot (#1) to its new, larger
shape, but store it on the page still with old slot length (252
rather than 276).

One consequence might be a corrupted second slot (#3) and, as a
consequence, "Cannot update pagezero" errors, typically seen on
secondary servers.

To see the problem run the following in version 14.10:

oncheck -pP 1 0 | head -5

addr             stamp    chksum nslots flag type         frptr
frcnt next     prev
1:0              354227   67b7   3      1000 ROOTRSV      304
1728  0        0
        slot ptr   len   flg
        1    24    252   0
Problem Summary:
****************************************************************
* USERS AFFECTED:                                              *
* Users of Informix Server prior to 14.10.xC4.                 *
****************************************************************
* PROBLEM DESCRIPTION:                                         *
* See Error Description                                        *
****************************************************************
* RECOMMENDATION:                                              *
* Update to Informix Server 14.10.xC4.                         *
****************************************************************
Local Fix:
A workaround would be first upgrading to a recent 12.10 fixpack
(12.10.xC8 or newer), then to version 14.10.
Solution
Workaround
not known / see Local fix
Timestamps
Date  - problem reported    :
Date  - problem closed      :
Date  - last modified       :
03.02.2020
09.06.2020
09.06.2020
Problem solved at the following versions (IBM BugInfos)
Problem solved according to the fixlist(s) of the following version(s)
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