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Problem IT35805
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Status: Closed |
MULTI-THREADED DB2FMP TRAPPED IN SYBASE CALLS INTERMITTENTLY
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| product: |
DB2 FOR LUW / DB2FORLUW / B50 - DB2 |
| Problem description: |
Federation Server with Sybase wrapper calls Sybase Open client
routines communicating with a Sybase database. A Multi-threaded
Sybase wrapper may call some Sybase routines which are
thread-unsafe without serialization under certain conditions,
this results in random traps. These routines are cs_ctx_alloc,
cs_ctx_drop, ct_init and ct_exit, so the trap stack will have
one of them.
One typical trap stack:
cfg__check_section
cfg__parse
cfg___load_config
comn_init_cfg
ct___load_config
ct__ctx_cfg
ct_init
FencedCtlib_Server::initialize_my_server
FencedRelational_Server::initialize_server
Wrapper::get_server
sqlqg_FMP_FindServer
sqlqgRouter
sqlqg_fedstp_hook
sqlqgDyload
sqlerFedFmpListener
sqlerWorkerThreadEntry
start_thread
clone
The top stacks can be various:
cfg__lex
cfg__nexttok
cfg__parse
comn_init_cfg
ct___load_config
ct__ctx_cfg
ct_init
cfg__catbuf
cfg__add_entry
cfg__parse
comn_init_cfg
ct___load_config
ct__ctx_cfg
ct_init
lm_list_alloc_ex
lm_list_alloc
cfg__add_section
cfg__parse
comn_init_cfg
ct___load_config
ct__ctx_cfg
ct_init
lm_list_drop
lm_list_op
comn_drop_cfg
cs_ctx_drop
__libc_malloc
com_conv_init
cs_ctx_alloc
comn_join_thread
...
ct_exit + 0x0299 |
| Problem Summary: |
****************************************************************
* USERS AFFECTED: *
* all *
****************************************************************
* PROBLEM DESCRIPTION: *
* See Error Description *
****************************************************************
* RECOMMENDATION: *
* Upgrade to 11.5.6 or later *
**************************************************************** |
| Local Fix: |
|
| Solution |
|
| Workaround |
****************************************************************
* USERS AFFECTED: *
* all *
****************************************************************
* PROBLEM DESCRIPTION: *
* See Error Description *
****************************************************************
* RECOMMENDATION: *
* Upgrade to 11.5.6 or later *
**************************************************************** |
| Comment |
Upgrade to 11.5.6 or later |
| Timestamps |
Date - problem reported :
Date - problem closed :
Date - last modified :
| 04.02.2021
21.06.2021
21.06.2021 |
| Problem solved at the following versions (IBM BugInfos) |
|
| Problem solved according to the fixlist(s) of the following version(s) |
