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IO Completion Listener

I have had an underwhelming amount of success hunting down the source
of this error and am hoping that someone here may have some insight.

Error logged in the event log:
Source: MSSQLSERVER
Category: (2)
EVENT ID: 17887
Description: IO Completion Listener (0x754) Worker 0x00FEC0E8 appears
to be non-yielding on Node 1. Approx CPU Used: kernel 0 ms, user 0 ms,
Interval: 15187.

Immediately followed by 100% CPU utilization. The server remains ping-
able and I can telnet to the SQL port, but it is otherwise effectively
unresponsive (queries timeout, RDP times out, etc.). This is also
logged in the SQL error log:

2008-03-19 15:52:37.80 Server Using 'dbghelp.dll' version '4.0.5'
2008-03-19 15:52:46.80 Server **Dump thread - spid = 0, PSS =
0x00000000, EC = 0x00000000
2008-03-19 15:52:46.80 Server ***Stack Dump being sent to D:
\Microsoft SQL Server\MSSQL.3\ MSSQL\LOG\SQLDu mp0004.txt
2008-03-19 15:52:46.80 Server *
*************** *************** *************** *************** *************** ****
2008-03-19 15:52:46.80 Server *
2008-03-19 15:52:46.80 Server * BEGIN STACK DUMP:
2008-03-19 15:52:46.80 Server * 03/19/08 15:52:46 spid 0
2008-03-19 15:52:46.80 Server *
2008-03-19 15:52:46.80 Server * Non-yielding IOCP Listener
2008-03-19 15:52:46.80 Server *
2008-03-19 15:52:46.80 Server *
*************** *************** *************** *************** *************** ****
2008-03-19 15:52:46.80 Server *
-------------------------------------------------------------------------------
2008-03-19 15:52:46.80 Server * Short Stack Dump
2008-03-19 15:58:13.09 Server Stack Signature for the dump is
0x00000006
2008-03-19 16:03:40.94 Server IO Completion Listener (0x730)
Worker 0x00A060E8 appears to be non-yielding on Node 0. Approx CPU
Used: kernel 0 ms, user 0 ms, Interval: 15187.
2008-03-19 16:06:10.47 Server Timeout waiting for external dump
process 6016.

2008-03-19 16:06:10.47 Server IO Completion Listener (0x754)
Worker 0x00FEC0E8 appears to be non-yielding on Node 1. Approx CPU
Used: kernel 0 ms, user 0 ms, Interval: 15187.
2008-03-19 16:17:34.51 Server IO Completion Listener (0x754)
Worker 0x00FEC0E8 appears to be non-yielding on Node 1. Approx CPU
Used: kernel 0 ms, user 0 ms, Interval: 15187.
The server is Windows 2003 SP2 (32bit), dual dual-core AMD opteron
processors, 8GB RAM, RAID 10. /3GB and /PAE are enabled in boot.ini.
"Lock pages in memory" has been granted to the account SQL runs as.

SQL Server is 2005 Standard Edition SP1 (32bit). "Use AWE to allocate
memory" is enabled. Min and max memory are set to 5GB.

If there is any other info you think may be helpful in
troubleshooting , please let me know. Any insight you've had into this
or similar problem would be appreciated. Thanks in advance.

Mar 24 '08 #1
1 7838
On Mon, 24 Mar 2008 09:44:00 -0700 (PDT), ab*****@gmail.c om wrote:

SQL Server is at SP2. Why not get current first.
http://www.microsoft.com/downloads/d...DisplayLang=en

-Tom.

>I have had an underwhelming amount of success hunting down the source
of this error and am hoping that someone here may have some insight.

Error logged in the event log:
Source: MSSQLSERVER
Category: (2)
EVENT ID: 17887
Description: IO Completion Listener (0x754) Worker 0x00FEC0E8 appears
to be non-yielding on Node 1. Approx CPU Used: kernel 0 ms, user 0 ms,
Interval: 15187.

Immediately followed by 100% CPU utilization. The server remains ping-
able and I can telnet to the SQL port, but it is otherwise effectively
unresponsive (queries timeout, RDP times out, etc.). This is also
logged in the SQL error log:

2008-03-19 15:52:37.80 Server Using 'dbghelp.dll' version '4.0.5'
2008-03-19 15:52:46.80 Server **Dump thread - spid = 0, PSS =
0x00000000, EC = 0x00000000
2008-03-19 15:52:46.80 Server ***Stack Dump being sent to D:
\Microsoft SQL Server\MSSQL.3\ MSSQL\LOG\SQLDu mp0004.txt
2008-03-19 15:52:46.80 Server *
************** *************** *************** *************** *************** *****
2008-03-19 15:52:46.80 Server *
2008-03-19 15:52:46.80 Server * BEGIN STACK DUMP:
2008-03-19 15:52:46.80 Server * 03/19/08 15:52:46 spid 0
2008-03-19 15:52:46.80 Server *
2008-03-19 15:52:46.80 Server * Non-yielding IOCP Listener
2008-03-19 15:52:46.80 Server *
2008-03-19 15:52:46.80 Server *
************** *************** *************** *************** *************** *****
2008-03-19 15:52:46.80 Server *
-------------------------------------------------------------------------------
2008-03-19 15:52:46.80 Server * Short Stack Dump
2008-03-19 15:58:13.09 Server Stack Signature for the dump is
0x00000006
2008-03-19 16:03:40.94 Server IO Completion Listener (0x730)
Worker 0x00A060E8 appears to be non-yielding on Node 0. Approx CPU
Used: kernel 0 ms, user 0 ms, Interval: 15187.
2008-03-19 16:06:10.47 Server Timeout waiting for external dump
process 6016.

2008-03-19 16:06:10.47 Server IO Completion Listener (0x754)
Worker 0x00FEC0E8 appears to be non-yielding on Node 1. Approx CPU
Used: kernel 0 ms, user 0 ms, Interval: 15187.
2008-03-19 16:17:34.51 Server IO Completion Listener (0x754)
Worker 0x00FEC0E8 appears to be non-yielding on Node 1. Approx CPU
Used: kernel 0 ms, user 0 ms, Interval: 15187.
The server is Windows 2003 SP2 (32bit), dual dual-core AMD opteron
processors, 8GB RAM, RAID 10. /3GB and /PAE are enabled in boot.ini.
"Lock pages in memory" has been granted to the account SQL runs as.

SQL Server is 2005 Standard Edition SP1 (32bit). "Use AWE to allocate
memory" is enabled. Min and max memory are set to 5GB.

If there is any other info you think may be helpful in
troubleshootin g, please let me know. Any insight you've had into this
or similar problem would be appreciated. Thanks in advance.
Mar 25 '08 #2

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