home clear 64x64
en blue 200x116 de orange 200x116 info letter User
suche 36x36
Latest versionsfixlist
14.10.xC11 FixList
12.10.xC16.X5 FixList
11.70.xC9.XB FixList
11.50.xC9.X2 FixList
11.10.xC3.W5 FixList
Have problems? - contact us.
Register for free anmeldung-x26
Contact form kontakt-x26

Informix - Problem description

Problem IT42577 Status: Closed

CONVERSION HANGS WITH CONVERT THREAD WAITING ON SQCONVSCPT CONDITION AND
CONV_SCRIPT THREAD NO LONGER PRESENT

product:
INFORMIX SERVER / 5725A3900 / E10 - 
Problem description:
During a migration of an Instance from 12 to 14 the following
hung situation can be seen:

The convert thread will be waiting on the sqconvscpt condition
as shown by onstat -g ath and onstat -g con output:

onstat -g con:

IBM Informix Dynamic Server Version 14.10.FC8 -- Quiescent -- Up
05:07:06 -- 1830932 Kbytes

Conditions with waiters:
cid      addr             name               waiter   waittime
350      4c56a460         ReadAhead          52       107
417      44156c30         bp_cond            63       164
4034     4e258280         sqconvscpt         48       18356

onstat -g ath:

IBM Informix Dynamic Server Version 14.10.FC8 -- Quiescent -- Up
05:04:57 -- 1830932 Kbytes

Threads:
 tid     tcb              rstcb            prty status
vp-class       name
 48       4c3dd6b8         46e87da8         3    cond wait
sqconvscpt   9cpu         convert


convert thread would have following stack:

 yield_processor_mvp
 mt_wait
 call_external_sql_script
 dummyupds
 sql_cleanup_entity
 do_each_version_work
 generic_fw_main
 convertSM
 th_init_initgls
 startup

The thread responsible for waking this thread from this
condition is named conv_script.
So if there is no longer a conv_script thread in the onstat -g
ath output that could indicate this problem has been
encountered.
Problem Summary:
****************************************************************
* USERS AFFECTED:                                              *
* Users of Informix Server prior to 14.10.xC9W1.               *
****************************************************************
* PROBLEM DESCRIPTION:                                         *
* See Error Description                                        *
****************************************************************
* RECOMMENDATION:                                              *
* Upgrade to Informix Server 14.10.xC9W1.                      *
****************************************************************
Local Fix:
Solution
Workaround
****************************************************************
* USERS AFFECTED:                                              *
* Users of Informix Server prior to 14.10.xC9W1.               *
****************************************************************
* PROBLEM DESCRIPTION:                                         *
* See Error Description                                        *
****************************************************************
* RECOMMENDATION:                                              *
* Upgrade to Informix Server 14.10.xC9W1.                      *
****************************************************************
Comment
Fixed in Informix Server 14.10.xC9W1.
Timestamps
Date  - problem reported    :
Date  - problem closed      :
Date  - last modified       :
28.11.2022
06.03.2023
06.03.2023
Problem solved at the following versions (IBM BugInfos)
Problem solved according to the fixlist(s) of the following version(s)