Rerunning Package With Parallel Tasks
Jun 26, 2007
Hello,
I have done a search and have read some of the posts, but am left more confused than before. I am fairly new to SSIS. Here is my situation and what i am trying to accomplish.
I have a package that has a sequence container, in which there are multiple SQL tasks (about 20) running in parallel. I have checkpoints enabled, and FailPackageOnFailure enabled as well. If the package fails, when i re-run the package it will run the last task as well as all the other tasks. What I am looking to accomplish is when the package is re-run, have the SQL tasks that failed ran and not the previous successful tasks.
I think the best way would be via disabling tasks on successful completion of a task, where it writes the name of the SQL task to a temp table, but I am skeptical.
Can anyone point me in a direction to help me accomplish what I am looking for please.
Thanks in Advance.
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May 28, 2007
Hi,
I have a problem with the task "event watcher".
I've made a query like the one in msdn (SELECT * FROM __InstanceCreationEvent WITHIN 10 WHERE Targetinstance ISA "CIM_DirectoryContainsFile" and TargetInstance.GroupComponent= "Win32_Directory.Name="e:\\temp""). I have 20 similar tasks for watching in different folders, but when there are too much tasks in parallel, it doesn't work anymore. I change the numbers of executables to 128 (in the general properties of the package (to test)) but it doesn't seems to work.
I don't understand why it works when there are only 1 or 2 (6 seems to be the maximum) tasks and not if there are more than 6.
Could you help me with this issue?
Configuration : Windows Server 2003, SQL Server 2005, SSIS, Sql Server Agent
Thanks a lot.
Julien.
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Mar 29, 2006
I have three SQL tasks executing in parallel in an Integration Services package.
+-B-+
A-+-C-+-E
+-D-+
It starts with task A; then B, C, and D all execute in parallel; and finally task E runs after BCD are done.
B, C, and D are all Execute SQL tasks, all with the same connection manager. Here is their code:
B) SELECT CASE WHEN COUNT(*) = 0 THEN 0 ELSE 1 END AS Process
FROM temp_B
C) SELECT CASE WHEN COUNT(*) = 0 THEN 0 ELSE 1 END AS Process
FROM temp_C
D) SELECT CASE WHEN COUNT(*) = 0 THEN 0 ELSE 1 END AS Process
FROM temp_D
Each one is setting a binary value to a package variable (using Result Set settings) based on the count of records from different tables.
This works with no problems when I run it against one server (development). But when I switch to the production server, task B and D both fail. I'v checked to make sure all of the temp tables exist in the database for that connection manager and that all three have the same connection manager - all is okay.
Here's the trickier part. When I'm still pointing to the production server and I run these tasks individually, they are all successful. It is only when they are attempting to run in parallel that they fail.
Here is the Output error:
Error: 0xC002F210 at Process Med?, Execute SQL Task: Executing the query "SELECT CASE WHEN COUNT(*) = 0 THEN 0 ELSE 1 END AS Process FROM temp_B" failed with the following error: "Invalid object name 'temp_B'.". Possible failure reasons: Problems with the query, "ResultSet" property not set correctly, parameters not set correctly, or connection not established correctly.
What could be causing this? I'm at a loss.
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Oct 24, 2006
Hi,
I have a master package with a sequence container with around 10 execute package tasks (for child packages), all in parallel. Checkpoints has been enabled in the master package. For the execute package tasks FailParentOnFailure is set to true and for the sequence container FailPackageOnFailure is set to true.
The problem i am facing is as follows. One of the parallel tasks fails and at the time of failure some of the parallel tasks (say set S1) are completed succesfully and few are still in execution (say set S2) which eventually complete successfully. The container fails after all the tasks complete execution and fails the package. When the package is restarted the task which failed is not executed, but the tasks in set S2 are executed.
If FailPackageOnFailure is set to true and whatever be the FailParentOnFailure value for the execute package task, in case of restart the failed package is executed but the tasks in set S2 are also executed.
Please let me know if there is any setting that only the failed task executes on restart.
Thanks in advance
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Aug 23, 2006
Hi
I have a SQL Server 2000 instance running on a Windows Server 2003 box with 4 processors. SQL Server is configured to use all 4 processors, and use all available processors for parallelism.
I have created a simple DTS package which has 2 "execute external process" tasks with no precedence constraints between them. There are no connections required or defined for the two tasks (sequential
processing is forced on tasks sharing connections). The DTS package
properties have the "limit the number of tasks to execute in parallel"
set to 4.
However, despite the above configuration, the two steps are never executed in parallel, but always sequentially.
Does anyone have any ideas as to why these tasks are not being executed in parallel?
Any suggestions welcome.
Thanks.
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Jan 19, 2008
I've create a package that currently uses 5 DataFlow tasks connected in series to get data from 5 different files and place that information into 5 different temp tables. Each Dataflow task contains only a OLE Source, a row count and a OLE destination. My question is - Is it normal practise to keep each of these separate, or should I put them all into a single DataFlow? The package should only continue if all five dataflow task complete successfully.
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Dec 11, 2014
I have a scenario where i have to run update task on multiple servers in parallel and once all of them are completed (success or failure) another task is to be run on another server
1. in maintenance plan, if we add tasks which are not joined, will they run in paralled at the same time
2. if we link the last task to all the tasks with link type 'completed' will the last task complete after all tasks are completed or when any one of them is completed (i have big doubt here)
the business requirement behind this is to bring data from multiple servers into shadow copies locally and then process them together. its ok if some server data transfer fails, but its not ok to start processing centrally while data transfer is going on. further, we want to run data transfer from multiple servers in paralleled to save time.
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Jul 2, 2015
Is it possible to do? I'm getting lock violations in I try to execute several tasks in parallel.
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Feb 19, 2008
Scenario
I have a package that is doing some file transformation (Text, XML, and Excel) job based on a variable value. This package is called by a Parent package, where I am calling this package parallel through a script Task. So there are three parallel script task and all variables are local to script task.
In Script Task I am assigning value to child package variable using following code.
packToLaunch = appLaunch.LoadPackage("SSISPackage.dtsx", Nothing)
For iVarCtr = 0 To Dts.Variables.Count - 1
VarName = Dts.Variables(iVarCtr).Name
packToLaunch.Variables(VarName).Value = Dts.Variables(VarName).Value
Next
Dts.TaskResult = packToLaunch.Execute()
Problem1
Out of three packages some are getting failed saying variables not found in collection.
To read a variable in child package I am setting it to ReadOnlyVariables List of Script Task.
In some places I am using following code
object objValue = null;
Microsoft.SqlServer.Dts.Runtime.Variables variables = null;
if (varDispenser.Contains(variableName))
{
varDispenser.LockOneForRead(variableName, ref variables);
objValue = variables[variableName].Value;
if (variables.Locked) variables.Unlock();
}
return objValue;
Problem2
I have created a hash table in child package and stored in a package variable through a script task.
When trying to access the variable through a custom task, in some of threads it€™s returning me System.Object not System.HashTable.
Both the problems are working fine on a single processor machine, it starts giving errors on multi processor 64 bit machine.
Need Urgent Help!!!!!
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Apr 26, 2006
I have data flow tasks, one which validates the import file and one which processes the import file if the validation passed. The validation runs and pushes the three row types to three different recordset destinations. When I enter the processing data flow task, I have three parallel trees processing each recordset saved in the previous task. I'm using a script component to generate the rows which are then sorted and merged with the production database to find existing records. Based on this, I split to an OLE DB command (running an UPDATE command) or OLE DB destination (to simply insert the records.)
In this particular case, all records are being updated and nothing is being inserted new. Two of the three trees will complete the sort but hang on the merge, split, and OLE DB command components. The other will do the same but also hang on the split.
In another case, I truncated each destination table before running the package and the package runs fine.
Are toes being stepped on in the data flow task and causing a deadlock?
Update: I removed the sort transformation and sorted the rows before pushing them to the recordsets and I still get the same results.
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Feb 13, 2006
In my application code I am trying to invoke multiple threads in which each thread is loading an instance of the same SSIS package and would initialize the package variables with different values and execute the different instances in parallel. In each thread - after the package execution has completed successfully - I read that instance's SSIS package variables to get result information from that Instance run.
When I load the same package in different thread using LoadFromSqlServer() method
- does the code create multiple instances of the SSIS package and load the distinct instances in each of the thread
- Will the Package Execution ID be different for the different instances?
- Are the package level variables instance safe?
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Dec 28, 2007
Hi,
Can we execute multiple instances of the same SSIS package simultaneously??
If yes, how?
If no, what is the work-around to simulate such a functionality?
Thanks in advance.
Regards,
B@ns
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Mar 29, 2008
Thanks in advance in reading this thread.
I have developed a big SSIS package to extract data from flat-files ( + 200 Dataflows ).
The situation is the following, inside de SSIS package, there are a lot of validations before extracting & loading the flat-files, i'm running this validations in paralell, so that when a file arrives, it enters the "validation process" and start extracting the file.
When i run the SSIS package from BIDS it works the way i have concepted it... but when i run the ssis in the server, the tables that are loaded through the process are only "available" when the SSIS PACKAGE ends, it is imperative that trough the process, when a table receives new data, it becomes ready, and don't just be available when the SSIS package finishes...
I have attached the an lousing .jpeg.
It is importart for the tables to be available, so the stored procedures(OUTSIDE SSIS PACKAGE) that are dependent of some tables, start working before the SSIS package Ends.
Thanks in Advance.
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Feb 6, 2007
Hi,
I have a Flat File Source and I want to retrieve few properties of it in an Script Component. How do I?
Also, How could I make the file path of Flat File Source or Connection manager dynamic or configurable through some file ?
any input is appreciated.
Fahad
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Feb 7, 2007
Hi everyone,
Once I've accesed to package by means of LoadFromSqlServer method how to read its Sql Tasks, for example?
I'm trying with the Executables property but unsuccessfully results:
pkg.Executables.Item(0)
Thanks in advance,
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Feb 12, 2007
Hi,
We want to develop an error handling process that will log the errors into multiple destinations (eventlog, text files or sql database) depending upon a variable set in the package. Also we want that this errror handling process should be initiated by all the tasks in the package on error.
Is this possible? Can the same event handler be called from multiple tasks in the package? Also in the event handler can we call another package which actually does the error handling. This way we have only one place to change our error handling process in case required.
Thanks in advance for your help.
$wapnil
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Mar 31, 2008
This may sound a little anal-retentive, but I have a number of SSIS packages that, when I open them, the first thing I have to do is scroll to the left or up to get to where the tasks are displayed. Even if I move the tasks right or down, they still end up in that initial position. This happens even if I use auto arrange.
Is there a way for me to set the package so it has a consistent point or display at which it opens?
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Jan 26, 2006
I have several sequence containers in one package that fire off execute package tasks. I would like each of the sequence containers to start at the same time when the job starts running. However when I set them up to do that, i get an error that the variable cannot be read because it is locked. I have the variables setup as readonly so not sure why they are being locked. When I run the package and have each sequence container fire off after the previous one ends it runs fine.
Any ideas on how to get around this?
Thanks!
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Aug 16, 2007
I'm trying to do some custom SSIS logging using event handlers, similar to the ideas provided by Jamie Thomson in the past. My problem is that when I use System:ourceID as one of the items to be logged, I can't match up the SourceID to any of the GUIDs that are displayed in the property window for the various tasks in my package.
Where is this sourceID coming from and how can I track it down?
Thanks for any insight on this.
John Woods
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Mar 30, 2008
Thanks in advance in reading this thread.
I have developed a big SSIS package to extract data from flat-files ( + 200 Dataflows ).
The situation is the following, inside de SSIS package, there are a lot of validations before extracting & loading the flat-files, i'm running this validations in paralell, so that when a file arrives, it enters the "validation process" and start extracting the file.
When i run the SSIS package from BIDS it works the way i have concepted it... but when i run the ssis in the server, the tables that are loaded through the process are only "available" when the SSIS PACKAGE ends, it is imperative that trough the process, when a table receives new data, it becomes ready, and don't just be available when the SSIS package finishes...
I have attached the an lousing .jpeg.
It is importart for the tables to be available, so the stored procedures(OUTSIDE SSIS PACKAGE) that are dependent of some tables, start working before the SSIS package Ends.
Thanks in Advance.
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May 7, 2007
Hi there,
I'm trying to keep track of the ETL process inserting/updating a row in one table for each package that finish in my ETL process when executing. So far, I created a Script task that increments by one a variable (counter) and then open a connection to my database an insert/update my table. What I want to see is Step 1/30, Step 2/30 and so on. Right know I can display Step 1, Step 2 but how can I get the overall number of tasks within a package?
Thanks in advance for any help you can give me.
Sincerely,
Ricardo
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Nov 27, 2007
I have a Package and a DataFlow Task.
The Package has TransactionOption=Required.
The DataFlow Task has an OLE DB Source and an OLE DB Destination.
The DataFlow Task has TransactionOption=Supported.
The package executes on a Workstation and DataSources for the OLE DB Source and the OLE DB Destination are on a Server.
After the package had been launched an error message showed:
[OLE DB Destination [43]] Error: SSIS Error Code DTS_E_CANNOTACQUIRECONNECTIONFROMCONNECTIONMANAGER. The AcquireConnection method call to the connection manager "DWH_Destination" failed with error code 0xC0202009. There may be error messages posted before this with more information on why the AcquireConnection method call failed.
[DTS.Pipeline] Error: component "OLE DB Destination" (43) failed the pre-execute phase and returned error code 0xC020801C.
[Connection manager "DWH_Destination"] Error: The SSIS Runtime has failed to enlist the OLE DB connection in a distributed transaction with error 0x8004D024 "The transaction manager has disabled its support for remote/network transactions.".
[Connection manager "DWH_Destination"] Error: SSIS Error Code DTS_E_OLEDBERROR. An OLE DB error has occurred. Error code: 0x8004D024.
If I set TransactionOption=NotSupported in the DataFlow Task then the package executes successful.
What is the problem?
Thanks in advance.
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Jul 25, 2007
What are the advantages and disadvantages of having multiple data flow tasks in one SSIS package?
Is this a good idea at all considering the workflow may be similar now but may change in the future? Should it be left as one data flow per package?
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Jun 12, 2007
I have some "Execute T-SQL Statement Tasks" in a package. I would like to run this same package on another SQL Server without having to change it on the other server. Since the server name can be given when setting up the connection, I think if I leave the server name out then the package could run on any server? Is my assumption correct?
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Jun 16, 2006
Hello
As a beginner I have created some Packages to import Data to SQL Server.
The Packages are running well.
I have created a Task to run the Package on a SQL SERVER 2005 Express. The Task starts.
Then a Execute Package Wizard Picture appears on the Screen.
I have mannually to select the Connection Manager and the Connection String.
After the selection the Task runs without any Problem.
Now I like to get the Task to run without any manual intervention.
I was looking in Internet but could not find a solution.
Can someone give me a hint how to get the Task working without intervention?
Thanks for an early answer.
Regards
Chaepp
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Dec 8, 2006
Hi,
I am trying to programmatically execute a package that contains an Execute SQL Task component bound to a variable for its "SqlStatementSource" property (via an expression). The variable is of type String and contains a simple value of "SELECT 1". The Execute SQL Task contains an expression that sets the SqlStatementSource property to the value of this variable.
The package runs fine when I execute it via dtexec or BIDS, but when I attempt to run it via the object model, I receive the following error message:
The result of the expression ""@[User::Sql]"" on property "SqlStatementSource" cannot be written to the property. The expression was evaluated, but cannot be set on the property.
I did a search on this forum and noticed quite a few threads about this same issue, but no explanation/solution. We have quite a few packages that have dynamically constructed SQL statements for Execute SQL Tasks, and they are all failing to run via the object model. Is there something that I am missing?
Thanks,
Vitaly
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Apr 19, 2007
Hi folks,
I have come across a situation where there 10 tasks. The second task on the flow is a script task which disables all further tasks based on a condition. I thought that the logic would be better if we force terminate the package successfully at this stage itself. How can this be done.
Thanks
Subhash Subramanyam
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Mar 6, 2007
HI All,
In several threads there has been discussion regarding adding connection managers to a package's data flow, etc. My challenge is that I have a large solution that contains many packages, and I need to change the connection manager linked to the data flow in all of the packages. When the solution was initially designed, data sources were used, and it has become a tedious maintenance issue to keep those in sync. We want to use a standard OLEDB connection manager, but adding a connection manager to each package and editing the corresponding data flow tasks in each package to use that new connection manager is a daunting task. I've coded a .Net module to access the packages, remove the old connection manager (data source) and add the new OLEDB data source. However, as I traverse the objects in the package hierarchy, when I come to the data flow object, the innerobject is not a dts object, but rather a _com object.. I can't seem to find any documentation/examples as to how to iterate the tasks within a data flow and change the connection manager. If you have any information, that would be quite helpful. If you reply with a code sample, if you would be so kind as to relate it to one of the sample packages provided with SSIS so I can run it, that would be great.
Thank you.
Steve.
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Mar 20, 2007
As part of my SSIS package, a list of sites is created that need to be created on a remote machine. let's say 1000 sites. I need to pass this list to a web service so web service sitting on that machine creates these sites for me. MY SSIS package does not run frequently so I can sacrifice time a little bit to get better functionality.
I need to move the sites that are not created (for any reasons) by web service to another table and successfully created sites to another table, so I need to get confirmation for each site from the web service.
Which option is better?
1) Calling web service for every single record (site) and get the confirmation and then based on the confirmation I move the records accordingly. I know this might be very time consuming, but as I said my SSIS package might only run every six months
OR
2) Sending records to a web service in a batch and get the result. I don€™t know how to do this though.
Any help or better solution is appreciated.
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Apr 16, 2006
I ran into a variety of problems trying to set a script task breakpoint in a package containing multiple script tasks. The debugger apparently treats the breakpoint as if it were set in ALL tasks in the package, not just the one in which it is actually set.
At best this results in hitting breakpoints in scripts where they are not set and at worst the debugger brings up the "Send error report" dialog and quits (while the package continues to run). The latter seems to happen most often when the script with the breakpoint has more lines than an earlier script and the breakpoint is set at a line number that exceeds the number of lines in the earlier script--it bombs when the earlier, shorter script starts.
To get the debugger to work under these circumstances I had to add some nonsense code like
While False
Dim i as Integer = 0
End While
to every script, at the same line number near the beginning of the script (line 40, for example). I then set a breakpoint on the middle statement in one of the scripts (doesn't matter which) to cause the debugger to open at runtime. It doesn't hit the breakpoint because the line is never executed. If the breakpoint is set on a line that can be executed in any script in the package, bad things tend to happen.
I then add a "stop" statement to the script that I want to debug. This only works if the debugger is already open, hence the dummy breakpoint above.
This workaround is usable, but I am debugging a package that has quite a few scripts and having to insert dummy code in all of them at a fixed line number is rather inconvenient. I would really like to see breakpoints work the way one would expect--only in the scripts where they are set.
Is there some other, easier way around this problem? Is there at least an easier way to get the debugger to open so that "stop" will work?
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Apr 25, 2001
Hi All,
I am working on SQL Server 7.0. Every weekend we go for reindexing of some tables. I want to know if it is possible to run the re-indexing of tables in parallel so that I can save time.
Our database is of size 80GB and one table is around 22GB. Rebuilding of index on this table takes a lot of time and we are unable to index the other tables.
Any solutions/suggestions are mostly appreciated.
Regards,
Mitra
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Jan 4, 2008
hi,
we currently use the Database Maintenance Plan to do backups for our SQL Server 2000 databases.
I notice that the database are backed up one after the other.
I would like to know how to run the backups in parallel rather than sequentially.
To do this, is there any dependency on the number of CPUs?
regards
Andrew
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