DB2 FOR LUW / DB2FORLUW / A50 - DB2

Customer reports Standby replay position is not moving up.
The following messages are repeatedly printed in Standby's
db2diag.log, and the data reported do not change at all:
2017-07-30-14.12.36.251331+480 I169146717A633       LEVEL: Info
PID     : 18481666             TID : 107807         PROC :
db2sysc 0
INSTANCE: istp                 NODE : 000           DB   : DBSTP

HOSTNAME: STPDB2
EDUID   : 107807               EDUNAME: db2lfr.0 (DBSTP) 0
FUNCTION: DB2 UDB, recovery manager, sqlplfrDoScanNext,
probe:2400
DATA #1 : SQLPLFR_SCAN_ID, PD_TYPE_SQLPLFR_SCAN_ID, 8 bytes
LFR Scan Num            = 3
LFR Scan Caller's EDUID = 138870
MESSAGE : HADR: finished disk scan, next pages read from memory
DATA #2 : String, 26 bytes
lfrReadBeforeAfterXhdrFlag
DATA #3 : Hex integer, 8 bytes
0x0000000000000000

2017-07-30-14.12.36.251675+480 I169147351A827       LEVEL: Info
PID     : 18481666             TID : 107807         PROC :
db2sysc 0
INSTANCE: istp                 NODE : 000           DB   : DBSTP

HOSTNAME: STPDB2
EDUID   : 107807               EDUNAME: db2lfr.0 (DBSTP) 0
FUNCTION: DB2 UDB, recovery manager,
sqlplfrDoScanNextForHadrRemoteLogs, probe:4000
DATA #1 : SQLPLFR_SCAN_ID, PD_TYPE_SQLPLFR_SCAN_ID, 8 bytes
LFR Scan Num            = 3
LFR Scan Caller's EDUID = 138870
MESSAGE : HADR: Received log gap, reading from disk.
DATA #2 : unsigned integer, 8 bytes
18174878065345
DATA #3 : unsigned integer, 8 bytes
18174878073496
DATA #4 : unsigned integer, 8 bytes
2
DATA #5 : unsigned integer, 8 bytes
18174878065345
DATA #6 : unsigned integer, 8 bytes
18174878069421
DATA #7 : Hex integer, 8 bytes
0x0000000000031008

This is because the extent header of a log file is corrupted, so
the HADR standby keeps alternating from reading from buffer and
disk while not progressing, as it mistakenly considers the log
file to be truncated. This causes an infinite loop in Standby
and makes Standby unable to proceed with replay.

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* USERS AFFECTED:                                              *
* HADR                                                         *
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* PROBLEM DESCRIPTION:                                         *
* See Error Description                                        *
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* RECOMMENDATION:                                              *
* See workaround                                               *
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Deactivate and reactivate the standby

not known / see Local fix

Date  - problem reported    :
Date  - problem closed      :
Date  - last modified       :

24.08.2017
24.11.2017
24.11.2017