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Problem IT34195
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Status: Closed |
ASSERT FAILURE OR HANG POSSIBLE ON PRIMARY SERVER WHEN USING CDCAND HDR SECONDARY SERVER
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| product: |
INFORMIX SERVER / 5725A3900 / E10 - |
| Problem description: |
An Informix server using 14.10.FC4W1 with CDC sessions and a
connected HDR secondary server may experience an Assert Failure
or hang and become unresponsive. The affected thread will be the
dr_prsend thread which communicates with the HDR secondary. An
example of the stack in the Assert Failure:
Stack for thread: 221163 dr_prsend
afstack
mt_ex_throw_sig
afsig_handler
mt_wakeup_expedite_haslock
mt_wakeup_expedite_haslock
mt_wakeup_expedite
cdrLSNQ_wakup
cdrlsn_skiplist_remove
cdrLSNQ_SetLSN@AF10_6
hdrSetLPG
dr_primary_send
dr_session_thread
startup
If a hang occurs then same dr_prsend thread may be seen in a
constantly running state. Using a command such as pstack or
procstack to obtain the stack of the CPU VP oninit process on
which the dr_prsend thread runs may show a stack similar to:
__fd_poll
mt_nap_int
mt_spin_lock_wait
cdrLSNQ_wakup
cdrlsn_skiplist_remove
cdrLSNQ_SetLSN@AF10_6
hdrSetLPG
dr_primary_send
dr_session_thread
startup
system
In both cases a restart of the primary server will be required. |
| Problem Summary: |
****************************************************************
* USERS AFFECTED: *
* Users of Informix Server prior to 12.10.xC15 and 14.10.xC5. *
****************************************************************
* PROBLEM DESCRIPTION: *
* See Error Description *
****************************************************************
* RECOMMENDATION: *
* Upgrade to Informix Server 12.10.xC15 (when available) or *
* 14.10.xC5. *
**************************************************************** |
| Local Fix: |
|
| Solution |
|
| Workaround |
****************************************************************
* USERS AFFECTED: *
* Users of Informix Server prior to 12.10.xC15 and 14.10.xC5. *
****************************************************************
* PROBLEM DESCRIPTION: *
* See Error Description *
****************************************************************
* RECOMMENDATION: *
* Upgrade to Informix Server 12.10.xC15 (when available) or *
* 14.10.xC5. *
**************************************************************** |
| Comment |
Fixed in Informix Server 12.10.xC15 and 14.10.xC5. |
| Timestamps |
Date - problem reported :
Date - problem closed :
Date - last modified :
| 13.09.2020
09.12.2020
09.12.2020 |
| Problem solved at the following versions (IBM BugInfos) |
|
| Problem solved according to the fixlist(s) of the following version(s) |
