Deadlock And Recovery Failure...
Feb 27, 2008
I wrote a stored proc that essentially did the following:
[truncate tables X, Y, Z]
begin tran
[lots of inserts to tables X, Y, Z]
if @@error <> 0
begin
rollback tran
return -1
end
commit tran
I'm not sure what happened, but the error message I received was:
Transaction count after EXECUTE indicates that a COMMIT or ROLLBACK TRANSACTION statement is missing. Previous count = 1, current count = 2.
I was under the impression that if an error occurred, it would never make it to the 'commit tran'. However, I believe that it rolled back the transaction, and then tried to commit. Nonetheless, a deadlock occurred and the database went into recovery. We have traced the recovery process and it made it to Phase 3 of 3 2% and another deadlock occurred DURING THE RECOVERY. We have tried restarting the server (suggested by the trace), but it immediately goes into recovery again. It is VERY URGENT to resolve this TODAY. I would greatly appreciate any and all help.
Thanks,
Matt
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Dec 30, 2004
I am writing up a general purpose document regarding Disaster Recovery and Backup and Restore, etc. I have a question that I've been unable to find any definitive answer on, and I was hoping that someone might have an answer.
Here is the scenario and what I have so far, and my question:
Scenario - A simple database, with one MDF and one LDF, each on it's own disk, with no mirroring or filegroups etc.
Disaster - the LOG disk fails.
To simulate the disaster, I shut down SQL Server, and delete the LDF manually.
When I restart SQL Server, the database is marked as suspect. As expected :)
So, now the recovery begins..... I've read that in this case there is no data loss, but I find that hard to believe. Can anyone confirm?
Anyway, how to restore the database to usable status? Here is what I've come up with so far:
1) Do a backup of "the tail of the log." This works even though there is no log. I have no idea why really, but I can't proceed otherwise.
2) Detach the database.
3) Reattach the database. This auto-creates a new log file (albeit not in the location I want, which makes for more work after).
At this point the database appears to be fine. I have not seen any lost data or problems, but of course I'm working on a test database, not with live users hitting it constantly. If the database were under heavy use, I expect that there might indeed be data lost?
Is this the recommended way to recover from a disaster of this type? Or, would it be better to just go back to your last good backups and forget about "up to the minute" recovery in this case? Or is there yet another means?
Thanks,
Travis
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Sep 13, 2006
Hi all,
We've got a problem with our server in that Windows has totally died - a routine upgrade appears to have gone wrong and the repair function of the Windows installer keeps getting stuck in a loop so I've given up on that front. What I was wondering is:
1. If I install a fresh copy of Windows 2003 R2 over the top of the existing install will that kill MSSQL Sever 2005 and/or Windows Sharepoint Services?
2. If so, is there a simple way to get them back?
3. If I install another copy of Windows on the D: drive is there a recommended way to move the MSSQL databases & Sharepoint to the newer install or a way of pointing the new install at the old databases?
I'm not an admin person (i'm a developer normally) so I haven't got a lot of background in this stuff so any tips, pointers or ideas are welcome. If this is covered somewhere on the MS site I'm happy to read but I'm just getting lost at the moment.
And, yes, I realise that backups are a good thing but the latest backups are not new enough for some items. The backup process has been adjusted accordingly.
Thanks
Michael.
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Aug 9, 2004
Good Morning guys n Gals.
New user on these forums, so basically, hey, how are yas?
I have a bit of a situation, and have done a search - although not much info has turned up relating to my situation (maybe my search was just useless).
Anyways, basically, I run SQL Server 6.5 on NT4 server.
The disks were striped - not RAIDED.
What happened was, the 4th disk died, and we replaced it with a new blank drive.
Now, I am left with two DAT files (log and data) for my database.
I cannot remember how large these were created as it was many years ago.
I have no backups.
Reseting the status hasn't worked, also I have tried creating a new DB / Devices (in size similar to those reported in windows), and "moving" the devices to point to the original ones, but no luck: and thus was wondering if anybody had any hint / tips or ideas?
Cheers,
Jamie
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Jul 20, 2005
Cluster services gives the high availability needed - that is great.But I have never seen any discussion about what happens when a nodefails - what do you do to get everything back to the active-passivetandem.I imagine there is not much difference in terms of recovery procedurefor either active or passive node. So I'm just going to make up ascenario that we have encountered. The system hard drive (not theshared disk) on primary node fails. Cluster fails over to the passivenode. Following are the problems I have at hand:-After installing windows, I need to install driver and configure thepermission to access the SAN. There is no way I could do it since thesecondary node has exclusive access to the disks.-Imagine I got that working, is there anyway to install SQL so SQLwould know this server used to be the primary node and attach the DBand translog automatically-Finally, there is no proper way to apply SQL 2000 service pack 3a.Originally when the cluster was fully functional, the service pack wasapplied to active node and that automatically upgrades passive node.Now we have a machine without 3a and a machine with 3a alreadyinstalled. See any problem?Consider all of the above as this one big question: What is a properprocedure to restore a cluster when one of the node goes down? Whetherit's the active or passive node.
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Sep 16, 2015
Assuming all windows servers belonging to the WSFC are on the same subnet, will the AG listener become a single failure point in system if all Application servers connect to the AG through the listener? If the answer is yes, what are the options to resolve this issue?
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Jul 20, 2015
In case of hardware unrecoverable issue, I have two msdn articles which states different things.
First one claims you remove the node from mscs.
[URL]
Second one claims you should remove it using sql server installation and links to the first link which says you should do it from mscs:
[URL]
Then this third article invalidates the second article. "To remove a node from an existing SQL Server failover cluster, you must run SQL Server Setup on the node that is to be removed from the SQL Server failover cluster instance."
[URL]
It is a hardware faillure where the secondary node is inaccessible.
So what is the proper way to evict a node you cannot access due to a hardware failure?
note: I don't plan on adding back the failed nodes after removing it. i.e. I am interested in the removing part.
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Jul 20, 2015
SQL 2012. I am working in understanding more the feature <AlwaysOn>. I have already worked with FCI (Failover Cluster Instance) and I would like to understand more about <AlwaysOn>.
Browsing internet/documentation I am getting more knowledge about <AlwaysOn> but a doubt persists:
1) Combination of FCI + AlwaysOn (2 SQL servers for FCI providing cluster instance: SQLClusterSQLReporting + 1 SQL server (at least) for <AlwaysOn>: SQLAOn/SQLReporting)
If the FCI instance is called SQLClusterSQLReporting, all the connections are mapped to this name.
But if the<AlwaysOn> feature is added to the system, in case of failure the name of <SQL Instance AlwaysOn> must be used therefore I am obliged to re-map all my connections to SQLAOn/SQLReporting.
QUESTION: IS it correct?
If yes, I do not understand the usefulness for the <AlwaysON> feature that lead to re-map all the connection.
In my opinion it should be a <MAIN> SQL Instance covering both <FCI> + <AlwaysOn>.
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May 29, 2015
My Database has many Dead lock issues,Will this Dead locks cause Differential database failure ?.
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Nov 10, 2015
Is there a way to send out an email woth deadlock information (victim query, winner query, process id's and resources on which the deadlock occurred) as soon as a deadlock occurs in a database or at instance level?I currently has trace flag 1222 turned on. And also created an alert that send me an email whenever a deadlock occurs. but it just says that a deadlock occurred and I log into sql server error log and review the information.
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Aug 17, 2015
We have a requirement to build SQL environment which will give us local high availability and disaster recovery to second site. We have two sites- Site A & Site B. We are planning to have two nodes at Site A and 2 nodes at Site B. All four nodes will be part of same Windows failover cluster. We will build two SQL Cluster, InstanceA will be clustered between the nodes at Site A Server and InstanceB will be clustered between the nodes at Site B, we will enable Always On Between the InstanceA and InstanceB and will be primary owner where data will be written on InstanceA and will be replicated to InstaceB. URL....Now we want we will have instanceC on the Site B and data will be writen from the application available on Site B, will be replicated to the instance on the Site A as replica.
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Dec 23, 2014
is bulk logged recovery model support point in time recovery
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Sep 17, 2015
Pages on a full recovery model database corrupted, need to ensure data loss is minimal for restore operation am thinking about restoring the latest full backup.
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May 5, 2015
in the process of migrating a big db from server 1 to server 2, we had to roll back the change. I started with taking a full db backup and restoring it on server 2 with norecovery, and then a couple logs with norecovery, and then the last log with recovery.
Is there some way to continue this chain now, I mean to change the db to norecovery, or other way to restore logs.
I dont want to do a new full backup.
If I try to do a log restore now i get the message:
Msg 3117, Level 16, State 4, Line 1
The log or differential backup cannot be restored because no files are ready to rollforward.
Msg 3013, Level 16, State 1, Line 1
RESTORE LOG is terminating abnormally.
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Sep 19, 2015
We have 3 replica AG setup. 2 replicas are in sync/automatic failover, the other(DR Server, different subnet) in asynchronous/manual mode…All these replicas were on sql server 2012, Recently we upgraded DR server to 2014. Since then we have a problem, the AG databases in 2014 instance went into ‘Synchronizing/ in recovery’ state…The SQL server error log has message, the recovery couldn’t start for the database ‘XYZ’…We tried to create a new database and add it to AG , it works for fine for other two 2012 replicas, but on 2014 we see the same issue
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Nov 1, 2015
We have an issue with a 3 node SQL 2012 Always on availability group. Normal operation is node 1 (primary replica) with node 2 and node 3 as secondary replicas.After some patching, SQL wasn't running on node 1 hence the AG flipped over to node 2. This went unnoticed for some time and the transaction log for one of the AG databases became full on node 2 and node 3. (I think this is because it couldn't commit the transactions on node 1 so couldn't truncate it's t-log?) The DB is using synchronous replication btw.So I started SQL on node 1 and flipped the AG back to node 1 (with a data loss warning but I accepted this).Now the issue is that on node 2 and 3, the DB in question is stuck in a "Reverting / In Recovery" State. I've tried various commands such as ALTER DATABASE SET ONLINE, RESTORE DATABASE WITH RECOVERY etc but these fail stating unable to obtain a lock on the DB.
The weird thing is that on node 1 the state of the DB is "synchronised".how to resolve this issue on node 2 and 3? I've left them overnight (in case they were rolling back transactions, the DB is fairly large) but nothing seems to have happened. remove the DB from the AG in node 2 and 3 and add it back in again, ie recreate the replication?
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Sep 10, 2015
If you are doing a disaster recovery of an entire SQL 2005 cluster, can you just install SQL server and restore the system database to get the configuration?
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Nov 17, 2007
Hi all,
I am using ODBC to connect SQL Server 2000 + SP4 server runnig on Windows 2003 standard edition Server +SP1. But, sporadically my application server connectivity to DB fails and i receive the following error messages
[Microsoft][ODBC SQL Server Driver][DBNETLIB]ConnectionWrite (WrapperWrite()).
[Microsoft][ODBC SQL Server Driver][DBNETLIB]General network error. Check your network documentation.) In D:de.cpp 702 Apr 12 2006 20:34:47
[Microsoft][ODBC SQL Server Driver]Communication link failure) In D:de.cpp 702 Apr 12 2006 20:34:47
20071017 08:23:10 TID (00000ff0) Sev (3) Err (0) Msg (Read failure.
General SQL error.
Strange thing is that i receive this error only sporadically, Please Please advice !
Thanks ,
Jitender
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Apr 26, 2008
Hello everyone,Can you please help me on the following problem that i have.I am using the microsoft web stress tools to simulate 100 concurrent users for one min, and the database will go into a deadlock for large part of the 100 concurrent users.Please help...i've been stuck for many days already. Thanks...Error 5: Transaction (Process ID 497) was deadlocked on lock resources with another process and has been chosen as the deadlock victim. Rerun the transaction..Here is my code.My connection string:<connectionStrings><add name="Connection_String" connectionString="Data Source=123.123.123.123;Initial Catalog=DBName;MultipleActiveResultSets=true;User ID=uname;Password=upass;connection timeout=60" providerName="System.Data.SqlClient"/> </connectionStrings>My web apps will call the below function. And the deadlock always occurs at the update statement (error 5). I believe it's probably the select statement above locked up the row. I've put in (UPDLOCK) for the select statement, and it still didn't work.private void UpdateLogTables(string Station_ID, string ContentFileName, string FileSize, string IP){ContentFileName = Regex.Replace(ContentFileName, "'", "''");string AdFileName = "";string AdFileNameClause = "";string DownloadCount = "";string TotalFileSize = "";string DownloadDate = "";string currentDate = "";string tempDate = "";string MyString = "";SqlConnection MyConnection = new SqlConnection(System.Configuration.ConfigurationMa nager.ConnectionStrings["Connection_String"].ConnectionString);SqlCommand myCommand = null;SqlDataReader myReader = null;try{MyConnection.Open();MyString = "SELECT AdFileName FROM tblContentRef WHERE Station_ID = '" + Station_ID + "' AND ContentFileName = '" + ContentFileName + "'";myCommand = new SqlCommand(MyString, MyConnection);myCommand.CommandTimeout = 60;myReader = myCommand.ExecuteReader();if (myReader.Read()) {AdFileName = myReader["AdFileName"].ToString();} }catch (Exception e){Response.Write("Error 2: " + e.Message + ".<br><br>Please email abc@abc.com.<br><br>Thank you.");} finally{if (myReader != null){myReader.Close();}}if (AdFileName != ""){AdFileName = "'" + AdFileName.Replace("'", "''") + "'";AdFileNameClause = "AdFileName = " + AdFileName;}else{AdFileName = "NULL";AdFileNameClause = "AdFileName IS NULL";}InsertDetailsLogTable(Station_ID, ContentFileName, AdFileName, FileSize, IP, MyConnection);SqlDataReader myReader2 = null;SqlCommand myCommand2 = null;bool Readable = false;try{MyString = "SELECT DownloadCount, TotalFileSize, DownloadDate FROM tblSummaryLog (UPDLOCK) WHERE Station_ID = '" + Station_ID + "' AND ContentFileName = '" + ContentFileName + "' AND " + AdFileNameClause + " ORDER BY DownloadDate DESC";myCommand2 = new SqlCommand(MyString, MyConnection);myCommand2.CommandTimeout = 60;myReader2 = myCommand2.ExecuteReader();if (myReader2.Read()){DownloadCount = myReader2["DownloadCount"].ToString();TotalFileSize = myReader2["TotalFileSize"].ToString();DownloadDate = myReader2["DownloadDate"].ToString();currentDate = DateTime.Now.ToString("M/d/yyyy");string[] inDate = DownloadDate.Split(new char[] { ' ' });tempDate = inDate[0];Readable = true;}if (myReader2 != null){myReader2.Close();} if (Readable){if (tempDate == currentDate){DownloadCount = Convert.ToString(Convert.ToInt32(DownloadCount) + 1);TotalFileSize = Convert.ToString(Convert.ToInt32(TotalFileSize) + Convert.ToInt32(FileSize));UpdateSummaryLogTable(DownloadCount, TotalFileSize, Station_ID, ContentFileName, AdFileNameClause, DownloadDate, MyConnection);}else{InsertSummaryLogTable(Station_ID, ContentFileName, AdFileName, FileSize, MyConnection);}}else{InsertSummaryLogTable(Station_ID, ContentFileName, AdFileName, FileSize, MyConnection);} }catch (Exception e){Response.Write("Error 3: " + e.Message + ".<br><br>Please email abc@abc.com.<br><br>Thank you.");}finally{ if (MyConnection != null){ MyConnection.Close();} }}private void InsertDetailsLogTable(string Station_ID, string ContentFileName, string AdFileName, string FileSize, string IP, SqlConnection MyConnection){string MyString = @"INSERT INTO tblDetailsLog ( Station_ID, ContentFileName, AdFileName, FileSize, IP, DateTime ) VALUES ( '" + Station_ID + "', '" + ContentFileName + "', " + AdFileName + ", '" + FileSize + "', '" + IP + "', getdate() )";try{ SqlCommand MyCmd = new SqlCommand(MyString, MyConnection);MyCmd.CommandTimeout = 60;MyCmd.ExecuteNonQuery(); }catch (Exception e){Response.Write("Error 4: " + e.Message + ".<br><br>Please email abc@abc.com.<br><br>Thank you.");}finally{} }private void UpdateSummaryLogTable(string DownloadCount, string TotalFileSize , string Station_ID , string ContentFileName , string AdFileNameClause, string DownloadDate, SqlConnection MyConnection){string MyString = @"UPDATE tblSummaryLog SET DownloadCount = '" + DownloadCount + "', TotalFileSize = '" + TotalFileSize + "', DownloadDate = getdate() WHERE Station_ID = '" + Station_ID + "' AND ContentFileName = '" + ContentFileName + "' AND " + AdFileNameClause + " AND (CONVERT(CHAR(19), DownloadDate) = CONVERT(CHAR(19), CAST('" + DownloadDate + "' AS datetime)))";try{ SqlCommand MyCmd = new SqlCommand(MyString, MyConnection); MyCmd.CommandTimeout = 60;MyCmd.ExecuteNonQuery(); }catch (Exception e){Response.Write("Error 5: " + e.Message + ".<br><br>Please email abc@abc.com.<br><br>Thank you.");}finally{} }private void InsertSummaryLogTable(string Station_ID , string ContentFileName , string AdFileName , string TotalFileSize, SqlConnection MyConnection){string MyString = @"INSERT INTO tblSummaryLog ( Station_ID, ContentFileName, AdFileName, DownloadCount, TotalFileSize, DownloadDate ) VALUES ( '" + Station_ID + "', '" + ContentFileName + "', " + AdFileName + ", '1', '" + TotalFileSize + "', getdate() )";try{ SqlCommand MyCmd = new SqlCommand(MyString, MyConnection);MyCmd.CommandTimeout = 60;MyCmd.ExecuteNonQuery();}catch (Exception e){Response.Write("Error 6: " + e.Message + ".<br><br>Please email abc@abc.com.<br><br>Thank you.");}finally{} }
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Jul 9, 2005
In a high traffic environment, deadlocks eventually occur as number of data processes increase. How can deadlocks be avoided, minimized and resolved. Please kindly provide scenario examples and samples of T-SQL code. Thanks much.
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May 7, 2001
SQL 7.0
Hi All
Iam trying to bcp a table(residing on my prod server to my local machine from command prompt) .Actually the table iam trying to bcp has heavy updates and selects, from users (70 users).
The users complain that system becomes slow.Is it got anything to do with my trying to bcp the mentioned table(table has 170,000 records).Also whenever i try to bcp this table, only after being chosen as the deadlock victim by Sql server,for 3 or 4 times that iam able to bcp the table.
Any help regarding this will be very much appreciated
TIA
kinnu
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Jul 27, 2000
I am unable to control the granularity of locks in our queries.
We are running queries through MTS and are getting deadlocks.
The batch includes two inserts and one select query - all are hitting on
only one table. This table has a unique clustered and a unique nonclustered index as well
as a primary key.
Within the batch, I have given a table hint to set transaction isolation level
to READCOMMITTED, ROWLOCK for the insert statements, like this
INSERT INTO ib_price with (READCOMMITTED,ROWLOCK)........
and the same for the Select statement.
SELECT retail_price, price_status_id FROM ib_price with (READCOMMITTED,ROWLOCK)
When I run sp_lock on the spid, I get output indicating that
SS7 is placing a IX lock on the table. I'm pretty sure this is
a big contributor to the deadlock.
I get the deadlock when I try to run more than one client with similar insert parameters.
How can I control the granularity to just rowlocks?
All help is appreciated.
Thanks
Brett
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May 12, 2000
How can I reproduce a deadlock in 7.0?
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Nov 4, 2002
Hi,
I am getting deadlock running a stored procedure from two machines. Looking at the error log (generated using trace flag 1204 and 3605), it seems the deadlock is on a key. But what I fail to understand is how come sql server granted exclusive lock on the key to both connections. The grant list shows that lock with Mode X is granted to both connection.
Deadlock encountered .... Printing deadlock information
2002-11-04 14:34:26.33 spid4
2002-11-04 14:34:26.33 spid4 Wait-for graph
2002-11-04 14:34:26.33 spid4
2002-11-04 14:34:26.33 spid4 Node:1
2002-11-04 14:34:26.33 spid4 KEY: 11:1205683443:11 (da00d1f77328) CleanCnt:1 Mode: X Flags: 0x0
2002-11-04 14:34:26.33 spid4 Grant List::
2002-11-04 14:34:26.33 spid4 Owner:0x2ffa89c0 Mode: X Flg:0x0 Ref:0 Life:02000000 SPID:179 ECID:0
2002-11-04 14:34:26.33 spid4 SPID: 179 ECID: 0 Statement Type: SELECT INTO Line #: 44
2002-11-04 14:34:26.33 spid4 Input Buf: Language Event: EXEC dbo.PROC_RVM_CALCULATE 22567, 'centreAVashista'
2002-11-04 14:34:26.33 spid4 Requested By:
2002-11-04 14:34:26.33 spid4 ResType:LockOwner Stype:'OR' Mode: S SPID:166 ECID:0 Ec:(0x6f02568) Value:0x85146480 Cost:(0/14E0)
2002-11-04 14:34:26.33 spid4
2002-11-04 14:34:26.33 spid4 Node:2
2002-11-04 14:34:26.33 spid4 KEY: 11:1205683443:11 (df001773794a) CleanCnt:1 Mode: X Flags: 0x0
2002-11-04 14:34:26.33 spid4 Grant List::
2002-11-04 14:34:26.33 spid4 Owner:0x85147ee0 Mode: X Flg:0x0 Ref:0 Life:02000000 SPID:166 ECID:0
2002-11-04 14:34:26.33 spid4 SPID: 166 ECID: 0 Statement Type: SELECT INTO Line #: 44
2002-11-04 14:34:26.33 spid4 Input Buf: Language Event: EXEC dbo.PROC_RVM_CALCULATE 22562, 'centreJTtest4'
2002-11-04 14:34:26.33 spid4 Requested By:
2002-11-04 14:34:26.33 spid4 ResType:LockOwner Stype:'OR' Mode: S SPID:179 ECID:0 Ec:(0x7dd0568) Value:0x3a24f920 Cost:(0/39BC)
2002-11-04 14:34:26.33 spid4 Victim Resource Owner:
2002-11-04 14:34:26.33 spid4 ResType:LockOwner Stype:'OR' Mode: S SPID:166 ECID:0 Ec:(0x6f02568) Value:0x85146480 Cost:(0/14E0)
Any pointer is much appreciated.
Thanks
Shailesh
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Dec 10, 1999
Help !!
How would you handle the deadlocks that happen often? Since the victim users complained about the disconnection.
Thank you ahead of time
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Apr 27, 2004
Can anyone help me resolve deadlock with following text
Parallel Query worker thread Involved in deadlock.
I am particularly interested in resolving details of above mentioned line,as I started getting dead lock
more frequently now and when I look
into query involved blocking and victim
I see nothing that can cause deadlock
they are update insert and select statement which were fine for long and all of sudden started giving problem.
Thanks in advance,
for any knowledge share
my mail id scraval@hotmail.com
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Aug 4, 1999
Hi,
When many users run some stored procedures I 've got some deadlocks. How to avoid that?
We run large stored procedures code which are using sometime the same table.
What is the best way for using the transaction isolation level, fillfactor indexes, procedure cache configuration ...etc to avoid that.
In addition, I am using MTS and sometimes the Tempdb is also locked, is it a Microsoft bug (again) ?
Herve Meftah
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Mar 30, 2001
We had a dead lock every night 9:00pm. I found out Server/Current Activity --Object Locks :
The error log showing error 17824, severity:10, state 0 DNCC TRACEON 208, SPID 28 DBCCTRACEOFF 208, SPID 28 In current activity --object locks and reapetedly showing "tempdb.dbo.sysobjects/sysindexes/syscolumns" 28:sa.master.dbo /INSERT /SQL_servername (MS SQLEW)
Any help will be appreciated.
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Apr 1, 2004
Hi
Sorry for bombading the forum with all these questions, but i am relatively new to sql 2000.
I am getting dead lock on the following procedure.
important background information
1. this is a multi user web-based call centre application
2. this procedure loads up a new contact based on priority
I see no reason how a dead lock could occur.
does any one have any idea. could it be something else that is locking up resource used by this procedure?
CREATE PROCEDURE topcat.getNewContactInfo
(
@contact_id int
)
AS
BEGIN
begin transaction
declare @id int
set @id = (SELECT TOP 1 _id FROM class_contact WHERE (status IS NULL OR status='New Contact' OR status = 'No Connect' OR status='callback') AND (checked_in IS NULL OR checked_in <> 1) AND (callback_date >= (getdate() + 1) OR callback_date IS NULL ) ORDER BY priority DESC)
UPDATE class_contact SET checked_in = 1 WHERE _id = @id
SELECT TOP 1 * FROM class_contact
WHERE _id = @id
commit
END
GO
wat i dont' get is that, this procedure only has one update statement, this is the only statement that could possibly hold a lock on another resource (i think) , i can't see how a dead lock can happen in this case since this procedure doesn't hold up 2 resources at a time.
James :(
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Jun 19, 2007
Can anyone help me to solve this deadlock?
2007-06-17 22:42:34.18 spid4 Wait-for graph
2007-06-17 22:42:34.18 spid4
2007-06-17 22:42:34.18 spid4 Node:1
2007-06-17 22:42:34.18 spid4 PAG: 66:1:26187 CleanCnt:1 Mode: IX Flags: 0x2
2007-06-17 22:42:34.18 spid4 Grant List 2::
2007-06-17 22:42:34.18 spid4 Owner:0x69f19520 Mode: IX Flg:0x0 Ref:2 Life:02000000 SPID:349 ECID:0
2007-06-17 22:42:34.18 spid4 SPID: 349 ECID: 0 Statement Type: UPDATE Line #: 1
2007-06-17 22:42:34.18 spid4 Input Buf: RPC Event: sp_prepexec;1
2007-06-17 22:42:34.18 spid4 Requested By:
2007-06-17 22:42:34.18 spid4 ResType:LockOwner Stype:'OR' Mode: S SPID:348 ECID:33 Ec:(0x5996C098) Value:0x2f8d2aa0 Cost:(0/0)
2007-06-17 22:42:34.18 spid4
2007-06-17 22:42:34.18 spid4 Node:2
2007-06-17 22:42:34.18 spid4 PAG: 66:1:3051 CleanCnt:1 Mode: SIU Flags: 0x2
2007-06-17 22:42:34.18 spid4 Grant List 1::
2007-06-17 22:42:34.18 spid4 Owner:0x65c57560 Mode: S Flg:0x0 Ref:0 Life:00000001 SPID:348 ECID:33
2007-06-17 22:42:34.18 spid4 SPID: 348 ECID: 33 Statement Type: UPDATE Line #: 22
2007-06-17 22:42:34.18 spid4 Input Buf: Language Event: exec [Extracts].dbo.asp_SPCUpdateDRPFieldsIR @Name = 'SPCExecStep B05-ASP'
2007-06-17 22:42:34.18 spid4 Grant List 2::
2007-06-17 22:42:34.18 spid4 Requested By:
2007-06-17 22:42:34.18 spid4 ResType:LockOwner Stype:'OR' Mode: IX SPID:349 ECID:0 Ec:(0x5425B500) Value:0x674a2160 Cost:(0/5FD8)
2007-06-17 22:42:34.18 spid4 Victim Resource Owner:
2007-06-17 22:42:34.18 spid4 ResType:LockOwner Stype:'OR' Mode: S SPID:348 ECID:33 Ec:(0x5996C098) Value:0x2f8d2aa0 Cost:(0/0)
=============================
http://www.sqlserverstudy.com
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Jul 23, 2005
Using SQL Server 2000 SP3a, I run the following in 2 query analizerwindows on the Northwind database, the second one always gets thedeadlock Msg 1205:Window 1:declare @cnt intselect @cnt = 5while @cnt > 0beginbegin transactionselect * from orders (updlock) where employeeid = 1update orders set employeeid = 1 where employeeid = 1waitfor delay '00:00:03'commitselect @cnt = @cnt -1endWindow 2:declare @cnt intselect @cnt = 5while @cnt > 0beginbegin transactionselect * from orders (updlock) where employeeid = 1 and customerid ='ERNSH'waitfor delay '00:00:02'commitselect @cnt = @cnt -1endThe query in the first window gets 123 rows and places update locks onthem, then updates them and commits. The query in the second windowgets a subset (about 5) of the results that window 1 gets also tryingto place update locks on the same rows. Shouldn't the query in window 2just wait for the transaction in window 1 to finish? why would itdeadlock?you can also get rid of the delay in the second window and it willdeadlock faster.thanks in advance.Eugene
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Feb 4, 2006
Hi.create table joe(c1 integer not null, c2 integer not null)Two sessions:Session 1:BEGIN TRANinsert into joe (c1,c2) values (1,2)Session 2:BEGIN TRANinsert into joe (c1,c2) values (3,4)Session 1:select * from joeSession 2:select * from joeOne of the sessions gets a deadlock victim message.thanks,Joe
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Jun 6, 2007
Hi,How we can detect deadlock from a database.Rahul
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