|
Problem IT16903
|
Status: Closed |
THE DB2EGCF PROCESS MAY FAIL TO ATTACH TO THE SHARED MEMORY SEGMENT IF THE OS ASLR FEATURE IS ENABLED |
| product: |
DB2 FOR LUW / DB2FORLUW / A10 - DB2 |
| Problem description: |
If the OS address space layout randomization (ASLR) feature is
enabled, then the db2egcf process may fail to attach to the
shared memory segment leading to a db2egcf failure. If this
issue is hit, then the following error will appear in the
db2diag.log file:
2016-02-01-04.49.35.554345+000 I964152A1024 LEVEL: Error
PID : 15204492 TID : 1 PROC : db2egcf
INSTANCE: db2inst1 NODE : 000
EDUID : 1
FUNCTION: <0>, <0>, <0>, probe:100
MESSAGE : ZRC=0x850F009A=-2062614374=SQLO_ADDR_CONFLICT
"An address space conflict was detected attaching to
shared
memory."
DATA #1 : String, 22 bytes
sqlocshr.-2062614374..
CALLSTCK: (Static functions may not be resolved correctly, as
they are
resolved to the nearest symbol)
[0] 0x09000000090DA1BC pdOSSeLoggingCallback + 0x34
[1] 0x0900000007F8B9C4 oss_log__FP9OSSLogFacUiN32UlN26iPPc +
0x1C4
[2] 0x0900000007F8B7B0 ossLog + 0xD0
[3] 0x0000000100001224
db2haAttachToDatabase__FPcP9SQLE_KRCBPP16sqeLocalDatabase +
0x324
[4] 0x00000001000015C0 db2haGetHADRState__FPcP9HDR_STATET1 +
0x60
[5] 0x000000010000263C main + 0x77C
[6] 0x0000000100000320 __start + 0x98
[7] 0x0000000000000000 ?unknown + 0x0
[8] 0x0000000000000000 ?unknown + 0x0
[9] 0x0000000000000000 ?unknown + 0x0
If this issue occurs in an automated(TSA) DB2 environment, it
may trigger an unexpected failover due to db2gcf being unable to
determine the state of the DB2 instance. |
| Problem Summary: |
****************************************************************
* USERS AFFECTED: *
* ALL *
****************************************************************
* PROBLEM DESCRIPTION: *
* See Error Description *
****************************************************************
* RECOMMENDATION: *
* Upgrade to DB2 10.1 Fix Pack 6 *
**************************************************************** |
| Local Fix: |
Disable the address space layout randomization (ASLR) feature. |
| Solution |
First fixed in DB2 10.1 Fix Pack 6 |
| Workaround |
not known / see Local fix |
| Timestamps |
Date - problem reported :
Date - problem closed :
Date - last modified :
| 02.09.2016
02.03.2017
02.03.2017 |
| Problem solved at the following versions (IBM BugInfos) |
|
| Problem solved according to the fixlist(s) of the following version(s) |
