Zombie Transaction In Process -2 Blocking Other Transactions
Jul 20, 2005
We are having a really big problem with a zombie process/transaction
that is blocking other processes. When looking at Lock/ProcessID
under Current Activity I see a bunch of processes that are blocked by
process 94 and process 94 is blocked by process -2. I assume -2 is a
zombie that has an open transaction. I cannot find this process to
kill and it seems that this transaction is surviving database
restarts. I know which table is locked up and when I run a select *
from this table it never returns. Does anyone have any ideas as to
how to kill is transaction.
Any help is appreciated.
A. Tillman
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Sep 23, 2005
I'm wondering if I'm doing this right. Wondering about the transactionsand error handling. (Do I even need to put BEGIN TRANSACTION ANDCOMMIT TRANSACTION in there?)I think that this sproc is causing occasional blocking:Alter Procedure sprocINSERTSTUFF@Col1Data int = Null,@Col2Data nvarchar(255) = Null,@Col3Data ntext = Null,@UniqueID int OUTPUTASset nocount onset xact_abort onDECLARE @err intDECLARE @ServerDate DateTimeSELECT @ServerDate = GETUTCDATE()BEGIN TRANSACTIONINSERT INTOtblStuff (Col1, Col2, Col3, DateCreated, etc.)VALUES(@Col1Data, @Col2Data, @Col3Data, @ServerDate, etc.)SELECT @err = @@error IF @err <> 0 BEGIN ROLLBACK TRANSACTION RETURN@err ENDSELECT @UniqueID = SCOPE_IDENTITY()COMMIT TRANSACTIONBEGIN TRANSACTIONINSERT INTOtblMoreStuff (UniqueID, DateCreated, Col1, Col2, Col3)Values(@UniqueID, @ServerDate, @Col1Data, @Col2Data, 'Text Label: ' +isnull(Cast(@Col3Data AS nvarchar(4000)),'<none>')SELECT @err = @@error IF @err <> 0 BEGIN ROLLBACK TRANSACTION RETURN@err ENDCOMMIT TRANSACTIONSELECT @err = @@error IF @err <> 0 RETURN @err
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Jan 19, 2006
I'm having a very difficult time getting any type of transactions to work without encountering blocking.
Here's what I have. I created a package using the Import data option on a database to start with. That gave me the following:
On the control flow tab there is a Preparation SQL task which truncates a table followed by a Data Flow Task that then copies from an oracle database into that same table.
The two are connected by the green success arrow.
For obvious reasons, if the import from oracle fails, I would like the truncate of the table to be rolled back so that the table in question is returned to its previous state.
I have tried the following:
Setting the transactions setting on the data flow panel to "supported" and changing it on the Control Flow tab to required.
Setting both to required.
Setting the data flow setting to "supported", then adding a sequence container onto the control flow panel, moved both the preparation and data flow tasks into it and then set the sequence container to "required".
In all cases I have installed the package onto the server and then scheduled a job in SQL Server agent to run the package.
No matter what way I do it, the preparation sql task apparently opens a transaction and then the following data flow task starts a different one and is blocked by the first one. If you check a log file I set it to generate it clearly gets stuck after the sql preparation job when trying to start the data flow task. Checking sql server itself (Activity monitor), the job is stuck because it is blocked by process "-2".
So I'm lost as to how to make one single transaction be used for the entire package and get the behavior i need....
Thx.
R-
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Feb 11, 2008
Ho do I clear a kill process blocking others to run
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Jul 20, 2005
Hi,we're having a problem with SQL 2000 and Opta 2000 JDBC driverwhere there is large update running and at the same time,read is blocked for a while.We're looking for a way to catch this blocking processand if it last more than 10 minutes, then email or send out a message.I know sp_lock returns all current locksbut how do you know which one is blocking other processes?Thanks for your help in advance.
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May 7, 2015
Imagine I set a begin transaction on table a and updating a row and not committed and not roll backed--first connection
From second connection I am selecting same table (obviously it wait until first connection commits/rollback based on my transaction level: my isolation level is read committed).
1. How do I know second connection is to waiting to first connection to complete.
2. If I want to select rows that are not locked by update process how do i need to do(ex:row 1,2,3,4 and 1 is locked by update process(exclusive lock) and i want to leave that and i need to select 2,3,4 records).
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Nov 14, 2007
Hi,
I was trying to extract data from the source server using OLEDB Source and SQL Server Destination when i encountered this error:
"Transaction (Process ID 135) was deadlocked on lock resources with another process and has been chosen as the deadlock victim. Rerun the transaction.".
What must be done so that even if the table being queried is locked, i wouldn't experience any deadlock?
cherriesh
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Nov 14, 2006
I'm receiving the below error when trying to implement Execute SQL Task.
"The ROLLBACK TRANSACTION request has no corresponding BEGIN TRANSACTION." This error also happens on COMMIT as well and there is a preceding Execute SQL Task with BEGIN TRANSACTION tranname WITH MARK 'tran'
I know I can change the transaction option property from "supported" to "required" however I want to mark the transaction. I was copying the way Import/Export Wizard does it however I'm unable to figure out why it works and why mine doesn't work.
Anyone know of the reason?
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Jun 5, 2007
Last night I received this error
Process ID 152:3 owns resources that are blocking processes on Scheduler 2.
When I did an BCC INPUTBUFFER I found it was sp_MSadd_repl_commands27hp which is doing the insert into MSrepl_commands has any else noticed and issue w/ sp_MSadd_repl_commands27hp blocking itself. At the time I had about 10 million records to move. I was using the default log reader settings so I was batching them in 500 chunk intervals.
I am wondering if any else has had problems like this? I basically see it whenever I move too much data through my replication server.
I found the followoing link http://support.microsoft.com/kb/319892
Sample Scenario
Client 1 connects to SQL Server.
Client 1 runs a Transact-SQL command that starts a transaction and performs data modification.
For example: begin tran
update authors set au_lname = 'test'
Client 1 becomes IDLE, shows up as sleeping, and awaiting a command with an open transaction in the sysprocesses system table.
Clients 2 through 255: Approximately 254 more clients log on to SQL Server and issue a SELECT from the authors table. These clients will all become blocked on the original update.
Client 1 tries to commit the transaction but it becomes queued because all the worker threads are tied up by clients 2 through 255.
I am afraid that I am seeing this more then I would like does anyone know a way to prevent this from happening?
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Sep 11, 2007
The following question applies to SQL Server 8.0.2187 (2000 + SP4+916287/914384/898709/915065/915340):
We have now twice had an incident where the same SQL Server has stopped responding. The only workaround is to restart the SQL Service. After this occurs, the log is filled with the following messages:
2007-09-10 16:42:14.29 spid3 Process ID 197:320 owns resources that are blocking processes on Scheduler 1.
2007-09-10 16:42:14.31 spid3 Process ID 74:324 owns resources that are blocking processes on Scheduler 5.
We haven't been able to pinpoint a cause or reporduce the problem on a dev server. I've seen several posts about this issue online but not many answers. Does anyone have any advice on how to troubleshoot this issue?
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Feb 14, 2007
Hi Folks,
I am having this table locking issue that I need to start paying attention to as its getting more frequent.
The problem is that the data in the tables is live finance data that needs to be changed and viewed almost real time so what I have picked up so far is that using 'table Hints' may not be a good idea.
I have a guy at work telling me that introducing a data access layer is the only way to solve this, I am not convinced but havnt enough knowledge to back my own feeling up. (asp system not .net).
Thanks in advance
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Jan 6, 2012
We are facing deadlock issue in our web application. The below message is coming:
> Session ID: pwdagc55bdps0q45q0j4ux55
> Location: xxx.xxx.xxx.xxx
> Error in: http://xxx.xxx.xxx.xxx:xxxx/Manhatta...Bar=&Mode=Edit
> Notes:
> Parameters:
> __EVENTTARGET:
> __EVENTARGUMENT:
[code].....
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Mar 29, 2006
I have a 3 simple packages get called from master package. First package populates time dimension (stored proc), second one populates transaction type dimension(stored proc) and the final one populates date dimension.
I set the TransactionOption = Required in the Master package, every thing else (package & component) set TransactionOption = Supported.
I have been testing transactions, basically I made time and transaction type dimension to fail and the package did roll back. I am stuck in the date dimension.
Within Date dimension I got a stored procedure which populates calendar date attributes into Wrk_Date table. Then I have a data flow task which reads from thats working table, but it cant access it. I tried running SP_WHO2 command, and the status is SUSPENDED, being blocked by id -2.
I saw someone had similar problem and I did read Ash's comments. I did try to change the isolation level, didnt help.
http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=74372&SiteID=1
Any thoughts please?
Thanks
Sutha
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Jul 20, 2006
Hello,
I seem to be misunderstanding the way transactions work with service broker queues. We have developed and deployed a service broker application that 5 queues and a windows service for each queue on multiple servers (3 currently). Due to a last minute issue, we had to not use transactions when the services executed a recieve and I am not updating the code base to use transactions and am running into blocking issues. One of the services runs for 90 seconds (spooling to the printer) and all of the servers block on the receive operation for this queue. I thought that if I was receving messages from a single conversation, other receives against this queue would not block.
Thanks,
Jim Stallings
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Oct 1, 2007
We have a web-based third-party application that has both background processes and user activity requests running in the same database (SQL Server 2005 SP2). The problem is that a background process will start a long-running transaction and hold an exclusive lock on a few rows in a given table (a small table, <100 rows). The web clients need to scan this same table, but when their "select *" statements get to those locked row(s), the web client queries stall waiting for that exclusive lock to be released. This effectively brings the entire web front end to a halt because all clients must hit this table for each user action. I realize that this is the classic lock condition that multiversioning databases like Oracle, PostgreSQL, SQL Server Compact Edition, and other databases do not suffer because they don't use shared read locks like SQL Server. But since we're on SQL Server for this app, what is the way to get around this problem? Modifying the clients to use WITH (NOLOCK) is not an option... there will be major consistency issues unless the clients run in Read Committed or higher. Any ideas? We could tweak this app if needed. Does SQL Server 2008 introduce multiversioning or at least some mechanism to get around this problem? I did not see it mentioned on the Microsoft site, but maybe I missed it. Thanks in advance.
Austin
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Nov 24, 1998
Ok sql-masters, I'm stumped and need someone to come to the rescue.
The issue: nested transactions = dblibrary process dead; broken connection or runaway process.
On the first try it usually bombs with the dblibrary... error. If I continue trying to run it, it will run, but actually runaway.
The sp:
/****** Object: Stored Procedure dbo.UP_MR1700 Script Date: 10/03/1998 11:00:08 AM ******/
CREATE PROCEDURE UP_MR1700 AS
DECLARE @TotRecs int
TRUNCATE TABLE MR1700_WorkTable1
EXECUTE MR1700_Insert_WT1_OnHand
EXECUTE MR1700_Insert_WT1_Packed
EXECUTE MR1700_Insert_WT1_Allocated
EXECUTE MR1700_Insert_WT1_Capacity
SELECT @TotRecs = (SELECT COUNT(Store_No) FROM MR1700_WorkTable1)
IF @TotRecs = 0 OR @TotRecs IS Null
RETURN -100
TRUNCATE TABLE MR1700_WorkTable2
EXECUTE MR1700_Insert_WT2_Classes
EXECUTE MR1700_Insert_WT2_Depts
EXECUTE MR1700_Insert_WT2_ClassGroups
EXECUTE MR1700_Insert_WT2_DeptGroups
EXECUTE MR1700_Report_Request
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Feb 2, 2007
Hello again,
It seems that we are pushing IS to the limits :). And again - still SSIS engine version RTM, so my comment may have been addressed in SP1 or HF1. A package is executed by SQL Agent once every day. Once in a fortnight it stalls - goes to the zombie mode. The status of the package in the SQL Agent monitor is "Executing", while log file reports nothing.
Now, I believe it is caused by sorting component in the data flow task. I have three reasons for doing so: the log file shows that data sources were read; I think I have seen it once in MS Studio and finally - previous version of the package without sorting worked fine for several months.
In our case, we used sorting for merging datasets - we decided to use staging (temporary) tables and lookups to the same task. Going live today, so hopefully it will be a valid work around.
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Mar 24, 2008
Okay, another esoteric question for ya:
My client recently (well, the middle of January, anyway) attempted to restore their year-end backup to do some reporting, only to find that the backup file was corrupted and unrestorable. They do have earlier monthly backups, but they do not keep transaction log backups past those monthly backups (i.e. transaction log backups for November are discarded once the monthly full backup has been completed).
My question is this: is there any way to restore the month-end backup from January, then read the transaction log backups for the month of January to undo January's transactions?
This is a highly business-critical issue; they are going to be in a lot of hot water with the SEC if they can't produce the financials stored in the DB.
This is a SQL 2000 SP4 database.
Thanks!
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Mar 24, 2008
Okay, another esoteric question for ya:
My client recently (well, the middle of January, anyway) attempted to restore their year-end backup to do some reporting, only to find that the backup file was corrupted and unrestorable. They do have earlier monthly backups, but they do not keep transaction log backups past those monthly backups (i.e. transaction log backups for November are discarded once the monthly full backup has been completed).
My question is this: is there any way to restore the month-end backup from January, then read the transaction log backups for the month of January to undo January's transactions?
This is a highly business-critical issue; they are going to be in a lot of hot water with the SEC if they can't produce the financials stored in the DB.
This is a SQL 2000 SP4 database.
Thanks!
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Apr 4, 2006
Taht is my code. I have a defined common transaction.
In my call path, I use:
using (IDbConnection connection = GetConnection ()) {
retval = q.Find (connection, out DataParticleList);
connection.Close ();
}
DetermineDataParticles ((DataParticle[]) DataParticleList.ToArray (typeof(DataParticle)));
And then, in Determine DataParticles, I do:
using (TransactionScope scope = new TransactionScope (_Transaction)) {
using (IDbConnection connection = GetConnection ()){
again. As both are using a TransactionScope that - uses the same transaction, and as the first connection has been closed - should the whole thing not reuse the same connection? GetConnection () has the same connection string.
I get a promotion to DTC in the second GetConnection (). That indicates that a new connection is being opened (and attached), and not the first one being used. Any hint on why that is? What can I change for this? I would really like this not to be promoted upward to DTC. It makes no sense to me.
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Oct 10, 2007
Greetings,
I have a requirement from the client that specifies to rollback every insert/update that happenned in the package if any task (control or data flow) fails.
I'm certain the SSIS package-level transactions take care of this, however, in this package, there is an OLE DB Transformation that executes a stored procedure which has a transaction in itself.
so to draw a quick picture...
Package
{
Transaction1
{
Data Flow
{
OLE DB Transformation
{
Stored Procedure
{
Transaction2
{
}
}
}
}
}
}
Here's my question:
What would happen if an error occured in the stored procedure (Transaction2)?
Does it behave like SQL Server 2005 where, given a scenario of nested transactions, the innermost transaction is comitted and the outermost transaction is rolled back?
I'm hoping that if the stored procedure decides to rollback Transaction 2 via error handling or if an SQL error occurs that I can rollback Transaction 2 and log an entry in the audit log.
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Apr 22, 2014
I have a update trigger. In this trigger I need to insert few records in 3 tables. If error comes in any of these inserts then previous inserts to get committed. This trigger was written in Sybase and it was possible to create transaction and commit the transactions.
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Jun 14, 2007
I'm trying to create a transaction replication from SQL Server 2000 to 2005. Basic replication between the servers works just fine. However, what I want to accomplish is to be able to skip some of the transactions. Example - from time to time we want to purge some of the historical data from the main database (the publisher). We don't want the same purging to occur on the destination database, which will be used for reporting purposes and needs to include all the historical information. I wanted to simply stop the replication log reader, purge the records, backup the transaction log with truncation and then restart the reader. The only problem - the truncation on the replicated database keeps the transactions of the purging until they are replicated, so the transaction log backup doesn't help. Any ideas would be greatly appreciated!
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Mar 5, 2015
I vaguely remember reading somewhere that all distributed transactions are executed at Serializable Isolation Level "under the covers."
1. Is this true?
2. What does "under the covers" mean in this case; i.e. will I not see the isolation level represented accurately in requests?
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Oct 23, 2015
I'm investigating a poorly performing procedure that I have never seen before. The procedure sets the transaction isolation level, and I suspect it might be doing so incorrectly, but I can't be sure. I'm pasting a bastardized version of the proc below, with all the names changed and the SQL mucked up enough to get through the corporate web filters.
The transaction isolation level is set, but there is no explicit transaction. Am I right that there are two implicit transactions in this procedure and each of them uses snapshot isolation?
SET NOCOUNT ON;
SET TRANSACTION ISOLATION LEVEL SNAPSHOT;
DECLARE @l_some_type varchar(20),
@some_type_code varchar(3),
@error int,
@error_msg varchar(50);
[Code] .....
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Nov 1, 2007
Goofed up and ran an update query. It messed up all the data in a single table. I'm trying not to restore the table from a previous backup since the backup is more than 20 GB. It's going to take forever to restore it. Any advice would be much appreciated!
Thanks!
Charles.
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Aug 23, 2006
I'm trying to run an SSIS package. The package runs on an SQL 2005 server on Win2k3 server. The package tries to connect to another win2k3 server with sql 2000 to retrieve some data. However, I recieve the errormessage shown in the topic.
I found info about modifying the MSDTC security settings under "component services" and did so. I made sure everything was allowed. However, the result was the same. Does anyone have any other idéa about what could cause this problem?
PS. The package works fine if I set up both databases on the same physical machine...
Regards Andreas
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Nov 10, 2006
Hi,
I got the following error when I try running my “comments.aspx� page with visual studio 2005Exception Details: System.Data.SqlClient.SqlException: Transaction (Process ID 83) was deadlocked on lock resources with another process and has been chosen as the deadlock victim. Rerun the transaction.
fExecuteQuery(String commandText, String dataSetName) +90 fExecuteQuerySet(String commandText, String dataSetName) +36 ASP.comments_aspx.GetNarComment() +618 ASP.comments_aspx.Page_Load(Object sender, EventArgs e) +476 System.Web.UI.Control.OnLoad(EventArgs e) +67 System.Web.UI.BasePage.OnLoad(EventArgs e) +1013 System.Web.UI.PopupPage.OnLoad(EventArgs e) +4 System.Web.UI.Control.LoadRecursive() +35
System.Web.UI.Page.ProcessRequestMain() +750
The segment code was the problem sits in file "comments.aspx"::
…
string cmdText=��;
cmdText = string.Format(@"-- Get All Narative comments fo all students in the course from @selectedTermID down to its child terms
exec aagGetStudentSectionComments @companyID={0}, @sectionID={1}, @selectedTermID={2}, @StudentID={3}
", _companyID, sectionID, selectedTermID, studentID);
ds = fExecuteQuerySet(cmdText, "getMySet");
…
// the 2 functions to deal with ADO.NET to be called in above code segment
// return a dataset.
public DataSet fExecuteQuery(string commandText, string dataSetName)
{
DataSet mds = new DataSet();
SqlDataAdapter da = new SqlDataAdapter(commandText, _cn);
da.SelectCommand.CommandTimeout = 600; // 600 seconds
da.Fill(mds, dataSetName);
return mds; // return dataset
}
// Assume para commandText contains sql query which returns a table or more.
// return a DataSet.
public DataSet fExecuteQuerySet(string commandText, string dataSetName)
{
DataSet mds = new DataSet();
mds = fExecuteQuery(commandText, dataSetName);
return mds; // return DataSet
}
Please give me the reason why that dealock happens?Thanks in advance
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Feb 27, 2006
ive seen this Deadlock Error message out on the internet being discussed, but no solution being offered.
i have a windows service that's running Select Statements [one at a time] - so unless there's some command in sql server that would re-run these - it could be a problem for me.
now if im running this select proc manually - of course i see the message and re-run the process, but how can this be accomplished programatically.
see msg below:
Transaction (Process ID 106) was deadlocked on lock resources with another process and has been chosen as the deadlock victim. Rerun the transaction.
thanks for any help on this
rik
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Nov 5, 2002
Hi,
My transaction log backup task for the production database which normally takes about 10 seconds has been running for almost about 2 hours now.
Is there any way to stop it without restarting sql services? The scheduled task was stopped from the jobs but spid is still in 'runnable' status. I should not kill 'backup log' or 'xp_sqlmaint' tasks.( It doesn't solve the problem anyway. the SPID goes in rollback status and stays like that until server is rebooted). Any way to find out what causes this problem and how to prevent it?
Thanks,
Shaili
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Nov 29, 2004
;)
Hello Everybody,
My name is Fabio and I post from Italy.
First, I don't know if this argument was already discussed in the past, but I'm new in this group so ...
Second I'm not so expert in DB due to the fact that I'm using SQL for the first time in my life ...
I use a store procedure to pass to every single user in my intranet (more than 150), details of different clients taken from an SQL table containing around 30.000 names.
Users have an ASP page displaying the information Selected in the DB.
This means that 150 users display info of 150 different clients.
To to this I use this code in store procedure:
CREATE PROCEDURE sp_assign_name
@iduser int
AS
if exists(select top 1 * from recallornotes where tmkoperator= @iduser)
update nominativitelecom set tmkmotrecall=convert(nvarchar(1), tmkstatus), tmkstatus=7 where id in (select top 1 id from recallornotes where tmkoperator=@iduser)
else
begin
if exists(select top 1 id from nonotes)
update nominativitelecom set tmkmotrecall=convert(nvarchar(1), tmkstatus), tmkstatus=7, tmkoperator =@iduser where id in (select top 1 id from nonotes with (UPDLOCK) order by NewID())
end
GO
This is working quite well when the number of users are more ore less around 50/60, when the number grows, on the IIS server (Pentium IV server, with Win 2000 in English, MS SQL 2000, and 1 Giga of ram), a file called DLLHOST.exe start to use the 100% of the CPU, and the users cannot display any other ASP page on their screens.
It is not a virus (some newsgroup report this problem connect to a worm virus, but we have latest antivirus files installed and spyware detect/delete on).
The SQL log reports this error:
"transaction (process id 69) was deadlocked on (lock) resources with another process and has been chosen as the deadlock victim. rerun the transaction".
Is there a way to avoid the conflict that occur when different users are trying to select the same record in the DB ?
In other terms, which process will you use in the same situation to select one record per user ?
Thanks in advance for your precious help,
Fabio
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Apr 29, 2015
The process could not execute 'sp_repldone/sp_replcounters' on 'sqldb2008'. (Source: MSSQL_REPL, Error number: MSSQL_REPL20011).The specified LSN {00000000:00000000:0000} for repldone log scan occurs before the current start of replication in the log {001317bf:0000f736:0008}. (Source:Â
MSSQLServer, Error number: 18768).The process could not set the last distributed transaction. (Source: MSSQL_REPL, The process could not execute 'sp_repldone/sp_replcounters' on 'sqldb2008'. (Source: MSSQL_REPL, Error number: MSSQL_REPL22037)
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Jul 21, 2006
We have a scenarion in a batch job. There are 3 sp's which are executed for every record in a table. After the execution of first sp the second sp executes depending upon the result of first sp. Simillarly for 2nd and 3rd sp.
Now if any sp execution fails than the whole transaction for that record in the table has to be rolled back.
Can this whole process of executing the multplie sp's insides a single transaction be accomplished using service broker with either a single queue or multiple queues?
sp 1 (1 record)
__________ l_____________
l l l sp2 ( 3 records for 1 record in sp1)
Simillalry for the one record in sp2, sp3 executes for multiple records.
Or in other words if processing of any message in a queue fails all the messages that have been processed already shoould be rolled back and no further execution should happen?
Also i would like to know can a conversation group be rolled back if processing of any message in the conversation group fails. I am asking this as we can club sp2 and sp3 together to get the results directly and than try for parallel processing.
P.S. We have a multiprocessor 64 bit server.
thanks
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