Transaction When App Pool Recycles Or The Worker Process Is Terminated Forcefully
Apr 13, 2010
The architecture of the application is straight forward. There is a web application which maintain account holder data. This data is processed and the status of account holders is updated based on number of business rules. This process is initiated using a button on the page and is a long running process (say 15 mins). A component is developed to do this data processing which internally calls stored procedures. Most of the business rules are kept in stored procedure.
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Jul 8, 2010
This is a really odd situation, so hopefully I can explain it well enough.
I am deploying an ASP.NET 4 webforms application to a Windows Server 2003 SP2 server running IIS6.
Here's the problem -- when the application pool recycles its worker process (w3wp.exe), about 80% of the time, I will get an ReflectionTypeLoadException error trying to access any page in the app that contains an EntityDataSoure every time I try to view it.
However (this is the interesting part) -- the other 20%, it works just fine. I've actually resorted to turning off recycling the worker process entirely for this application pool and just add/remove whitespace from web.config forcing the site to recompile until I get a "good" w3wp.exe.
If this isn't clear, what I'm saying is: the actual worker process doesn't work at all for pages containing an EntityDataSource for about 4/5 times it starts, but still manages to serve all other pages just fine. Once you get a worker process that manages to serve a page with an EntityDataSource, it works every time until that process gets recycled.
My question is, how can I debug this? It works fine on my dev machine, it works fine on the server as long as you get a good process running, but iisreset or a server restart or anything that kills the worker process is almost guaranteed to cause the site to not come back up and throw this ReflectionTypeLoadException.
[Code].....
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Mar 4, 2010
Our application uses the Enterprise Library's PropertyProxyValidator class to validate user input (v4.1 - Oct 2008). On occassion, the code will raise an exception saying the source type cannot be found. This error persists until the application pools recycle at night, at which point everything works again. It tends to only affect one of the web front ends at a time (there are two). I tracked down where the exception was being raised, and this is the section of code:
[Code]....
(As you can see, the value for this.SourceTypeName is shown in the exception and I've checked that it matches exactly.)
We have never been able to reproduce this exception and at this point don't have any ideas left as far as causes. For a while, my suspicion was that it was related to the Temporary ASP.NET Files folder. The last time the error occurred, I copied that folder from both web front ends. Then the next day when things were back to normal, I copied the folders. When I did a directory and file comparision of the affected web front end, I found no differences.
Our application is essentially user controls hosted in web parts on SharePoint (they don't do anything with SharePoint - in fact, for a while, we were developing the controls on ASPX pages). There are two servers in the farm, both with Windows Server 2003 R2 Standard x64, IIS 6, and .NET v3.5. This issue doesn't strike me as a problem with Enterprise Library or SharePoint, hence why I've posted here, but more so with assembly loading.
Any ideas for causes would be greatly appreciated. I could also use suggestions on tools I could use to try and debug this when happens again (it happens 2-3 times a month) in production.
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Dec 25, 2010
Dear ladies and sirs.
I have a .NET infra code running both within the IIS worker process and within a desktop client app. How can the .NET code determine whether it is running within an IIS worker process?
I know that I could check the name of the process (w3wp.exe, for instance), but I would like a more robust approach. I wish to make a side note. This is not a production need. I need this information to enable certain scenarios useful during the development and testing phase. Specifically to ease the testing of secure vs non secure configurations.
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Jul 7, 2010
using framework 4.0 keep giving me this error:
Event Type: Error
Event Source: .NET Runtime
Event Category: None
Event ID: 1027
Date: 07/07/2010
Time: 22:33:36
User: N/A
Computer: GUY
Description:
Application: w3wp.exe
Framework Version: v4.0.30319
Description: The process was terminated due to stack overflow.
For more information, see Help and Support Center at [URL]
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Jul 23, 2010
I have a stored procedure which fetches data after joining 8-9 tables and inserts that into a temp table. It was running fine till now, but now when the amount of data fetched have exceeded 20000, the SP is breaking. I have debugged the sp and found that this main query is failing after returning arround 15000-16000 records.
The error message says Transaction (Process ID) was deadlocked on lock resources with another process and has been chosen as the deadlock victim. Rerun the transaction. I know what is deadlock, but when i checked with SP_LOCK stored proc i only found that my process is running on database only. So how is this getting deadlocked when there are no other processes running simultaneously on server.
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Jun 2, 2010
I'm using VS 2010. And in VS 2010 it's even more painful now to attach to the worker process when you want to test your local IIS site via IIS, not the VS built-in web server.It's more painful because now when you select the worker process () via the Debug Menu | Attach to Process | w3wp.exe it brings up an additional prompt asking if you're sure you want to do this.
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Nov 17, 2010
I have increased the number of worker process of default application pool to 15(IIS->Application Pools->DefaultAppPool->Properties->Performance->webgarden).after increasing the worker process i am facing session timeouts
My application is using a state server session managemnet and a predefined machineKeyCan you please guide me in how to increase the worker process without session loss
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Jan 24, 2011
In IIS application pool I have set 2 in maximum worker process in process model, will application object, session object and cache object will be shared by the all worker process or will all worker process have different application object, session object and cache object.
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Mar 30, 2011
I'm in a need to get a list of all the ASP.NET running worker process and its associated application pools and process ID.Is there a way to do this pragmatically (C#) or a powershell script?
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Apr 19, 2010
My web application is a product which has to deploy to a variety of web servers. Is there a way to determine the account name that the .Net worker process account is using at runtime?
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Dec 21, 2010
First of all, I'm not a pro on IIS configuration topic.With that being said, I got a website written in VB.NET 3.5 Web Forms. I have a small web service, ASMX, running as a part of this website. One page on the website calls the web service with AJAX (jQuery $.ajax function, post). The server is running Windows 2003 and IIS 6.0. The website and the web service are sharing the same Application Pool.
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Dec 7, 2010
What is the difference between IIS Worker process, Application pool and application domain? Do we have more than one application domains in one application pool?Does one application domain means one virtual directory?
If we have 2 virtual directories pointing to same physical folder. Will they share the same memory or different when there instances are opened in the browser? Will they be in 2 different application domains?
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Jul 13, 2010
We recently had to enable Memory Recycling on a 2.0 app pool (IIS6). We checked both boxes, leaving in the default values of 500 MB for virtual memory and 192 MB for used memory. Here's where it gets interesting. Every 60 seconds, on the dot, the worker process is forced to recycle.Our tests were spamming the site with concurrent users trying to get the virtual memory up to 500MB, but we never could (as viewed in task manager). However, that didn't matter. We tested it by simply recycling the pool and hitting one page, once, and seeing around 30MB allocated and then just waiting 60 seconds and watching the process die in task manager (and a new one start up).We've increased the value for maximum virtual memory to 768MB and the issue *appears* to have gone away, but just arbitrarily accepting a fix isn't how we like to do things. I haven't found any officially reported bugs, kb articles, or solutions on blogs that point to what is causing this. To me, this means either it's some crazy environmental issue or the answer is really obvious and we just can't see it.
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Oct 30, 2010
How can I tell when the ASP.NET worker process last restarted?In ASP.NET, how can I tell when the app domain last recycled?
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Nov 27, 2010
I made a small app to capture frame from video using asp.net, in visual studio, it works fine. however the problem arises when i try to use any other servers, I am currently using iis 7.5, and trying to debug on server, but alas when i reach some region of code the attached w3wp.exe just get detached, the process crashs, no debug available anymore.
Faulting application name: w3wp.exe, version: 7.5.7600.16385, time stamp: 0x4a5bd0eb
Faulting module name: unknown, version: 0.0.0.0, time stamp: 0x00000000
Exception code: 0xc0000005
[code]...
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Apr 4, 2011
Does ASP.NET worker process still return data in chunks of 31KbThis MSDN article written in May 2004 specifies the following.When using the ASP.NET process model,the ASP.NET worker process sendsresponses back to the client, it firstsends them through IIS in 31-kilobyte(KB) chunks. This applies to .NETFramework 1.1, but it could change infuture versions.
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Mar 8, 2011
In my application i am sending emails of bigger size (> 2.5 Mb). Now till the emails are being sent, the application is in hanged up state (mouse cursor is of busy state).One of my friend suggested to use background worker that "could" display message something like "Please wait...Sending email". I have no idea as to how to use the background worker process. if there is any other quicker/easier alternative,
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Oct 25, 2010
we're hosting a webservice that runs with up to 9 worker processes in it's application pool. There's a memory limit configured for the application pool to keep the system/server performant. Now my concern is that, if the memory limit is reached, a worker process may be recycled although there is an active request handled by this worker process that needs to be responded/finished first. The problem is especially with purchase/order requests, as such requests typically run several minutes and must not be aborted by any worker process recycle process. Is there any configuration setting that allows me app pool recycling by granting that no active process will be abandoned?
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Jan 3, 2011
Does anybody know how I can trigger the ASPNET_Worker process on Windows 2000 and 2003 servers? Apparently, every time we reboot our servers on Saturday nights our monitoring software generates alerts for the ASPNET_Worker process and they don't go away until during the morning hours. This leaves me to believe that this process doesn't automatically run after a reboot and only starts to kick in when clients access our websites during the day. I'd like to be able to trigger the process after a server reboot so our monitoring software doesn't identify it as down.I was reading this post on http://weblogs.asp.net/jgalloway/archive/2006/06/01/Avoid-IISRESET-in-ASP.NET-applications-_2800_added-bonus_3A00_-ASPRESET_2900_.aspx and I believe the code on that article is what I need. However, I am only a SysAdmin and have very little knowledge about programming. The writer mentioned compiling the code using SnippetCompiler but after downloading the software I can't seem to figure out how to turn the code into an .exe.
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Aug 23, 2010
I've run into a particularly nasty bug where an ASP.NET website attempts to make a call to a WCF service method that sends IIS into a death spiral...that ultimately brings down the associated app pool. It never gets to our log4net code that outputs unhandled exceptions.I was watching w3wp.exe processes spin up and die, so I figured I'd take a dump file on termination using ProcDump from SysInternals using the following command
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May 6, 2010
We're experiencing a nasty issue in Oracle 11g Release 2 where the w3wp process takes over and entire processor core, and debugging shows that the Oracle data provider is throwing ThreadAbortExceptions infinitely. A developer found this issue by doing the following:
1) Browse a web site that uses Oracle data connections locally (http://localhost/OracleWebSite - we use IIS, not the ASP.NET dev server, for all of our sites). This ensures that the w3wp process is running and that an active Oracle pool of connections exists in the app pool.2) Stop the web site (or perform a Rebuild All operation in Visual Studio on the web site in question).Our Oracle connection handling in the affected applications (all Oracle web apps) is well-established and robust. This issue does not occur if we disable connection pooling. This issue does not occur in Oracle 11g Release 1.
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Jul 19, 2010
Unable to start debugging on the web server. The IIS worker process for the launched URL is not currently running.I'm running Windows 7 64 bit, VS 2008 sp1.When I first try to debug I get the error msg above. I wait a few minutes (presumably some service is starting) and debugging will start but no breakpoints are recognized.Some of the things I've tried:Changing the binding of my site from a static IP to "*".
Enabled windows authentication.made sure localhost = 127.0.0.1 in the hosts file.The website was built under windows xp and whatever version of IIS ships with xp. My web config has no errors that I know of but might be missing something required for iis 7 (??)
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Oct 21, 2010
I have a deadlock problem that occurs every 5 minutes on SQL update. I get the following error randomly - means qurey failed one time every 200 calls. I'm using transaction scope to manage transaction.
code:
using(TransactionScope scope =
new
TransactionScope())
{
SELECT ... FROM TABLE1
UPDATE TABLE1 SET [F1] = @F1, [F2] = @F2, [F3] = @F3, [F4] = @F4, [F5] = @F5 WHERE UId = @UId
scope.Complete();
}
error:
System.Data.SqlClient.SqlException: Transaction (Process ID 51) was deadlocked on lock resources with another process and has been chosen as the deadlock victim. Rerun the transaction
stack trace:
at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection)
at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection)
at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj)
at System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj)
at System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString)
at System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async)
at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, DbAsyncResult result)
at System.Data.SqlClient.SqlCommand.InternalExecuteNonQuery(DbAsyncResult result, String methodName, Boolean sendToPipe)
at System.Data.SqlClient.SqlCommand.ExecuteNonQuery()
at DAL.RunSQL(String query, SqlParameter[] parameters, Boolean openTransact) in C:prjDAL.cs:line 215
I took trace in SQL about deadlock and same SQL query is mentioned bu deadlock. I do not understand how to resolve this deadlock.
SQL log:
deadlock-list
deadlock victim=process5462718
process-list
process taskpriority=0 logused=0 waitresource=KEY: 20:72057597472604160 (ce004d0b917a) waittime=30 ownerId=5937428 transactionname=user_transaction lasttranstarted=2010-10-20T16:29:04.050 XDES=0x5d00280 lockMode=X schedulerid=2 kpid=2168 status=suspended
spid=65 sbid=0 ecid=0 priority=0 trancount=2 lastbatchstarted=2010-10-20T16:29:04.110 lastbatchcompleted=2010-10-20T16:29:04.110 clientapp=.Net SqlClient Data Provider hostname=IPTBEWKS017 hostpid=3112 loginname=iptuserjde isolationlevel=serializable (4) xactid=5937428
currentdb=20 lockTimeout=4294967295 clientoption1=671088672 clientoption2=128056
executionStack
frame procname=adhoc line=1 stmtstart=222 sqlhandle=0x0200000086adfa0c959ccbdd7ef0e31e854e3a987706ae38
UPDATE TABLE1 SET [F1] = @F1, [F2] = @F2, [F3] = @F3, [F4] = @F4, [F5] = @F5 WHERE UId = @UId
frame procname=unknown line=1 sqlhandle=0x000000000000000000000000000000000000000000000000
unknown
inputbuf
(@UId nvarchar(9),@F1 nvarchar(9),@F2 nvarchar(9),@F3 int,@F4 int,@F5 datetime)UPDATE TABLE1 SET [F1] = @F1, [F2] = @F2, [F3] = @F3, [F4] = @F4, [F5] = @F5 WHERE UId = @UId
process taskpriority=0 logused=0 waitresource=KEY: 20:72057597472604160 (cc0078aef293) waittime=88 ownerId=5937412 transactionname=user_transaction lasttranstarted=2010-10-20T16:29:04 XDES=0x2b028280 lockMode=X schedulerid=1 kpid=6788 status=suspended
spid=74 sbid=0 ecid=0 priority=0 trancount=2 lastbatchstarted=2010-10-20T16:29:04.050 lastbatchcompleted=2010-10-20T16:29:04.050 clientapp=.Net SqlClient Data Provider hostname=IPTBEWKS017 hostpid=3112 loginname=iptuserjde isolationlevel=serializable (4) xactid=5937412
currentdb=20 lockTimeout=4294967295 clientoption1=671088672 clientoption2=128056
executionStack
frame procname=adhoc line=1 stmtstart=222 sqlhandle=0x0200000086adfa0c959ccbdd7ef0e31e854e3a987706ae38
UPDATE TABLE1 SET [F1] = @F1, [F2] = @F2, [F3] = @F3, [F4] = @F4, [F5] = @F5 WHERE UId = @UId
frame procname=unknown line=1 sqlhandle=0x000000000000000000000000000000000000000000000000
unknown
inputbuf
(@UId nvarchar(9),@F1 nvarchar(9),@F2 nvarchar(9),@F3 int,@F4 int,@F5 datetime)
UPDATE TABLE1 SET [F1] = @F1, [F2] = @F2, [F3] = @F3, [F4] = @F4, [F5] = @F5 WHERE UId = @UId
resource-list
keylock hobtid=72057597472604160 dbid=20 objectname=dbipt_rc41_02.dbo.TABLE1 indexname=PK_TABLE1 mode=RangeS-U associatedObjectId=72057597472604160
owner-list
owner id=processdbbe40 mode=RangeS-S
waiter-list
waiter mode=X requestType=convert
keylock hobtid=72057597472604160 dbid=20 objectname=dbipt_rc41_02.dbo.TABLE1 indexname=PK_TABLE10 mode=RangeS-U associatedObjectId=72057597472604160
owner-list
owner mode=RangeS-S
waiter-list
waiter id=processdbbe40 mode=X requestType=convert
I have tried to analyse the trace with this post but unsuccessfully: [URL] UId is my primary key - I do select on F3 column just before in same transaction but i have also an index on F3 column.
->
Spid 65 is running this query (line 2 of proc [p1]):
UPDATE TABLE1 SET [F1] = @F1, [F2] = @F2, [F3] = @F3, [F4] = @F4, [F5] = @F5 WHERE UId = @UId
Spid 74 is running this query (line 2 of proc [p2]):
UPDATE TABLE1 SET [F1] = @F1, [F2] = @F2, [F3] = @F3, [F4] = @F4, [F5] = @F5 WHERE UId = @UId
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May 11, 2010
I have an invoke function that I call. It On the client side it reads a file and then sends the line to the server side function here and waits for a return. Here is the server side code:
[Code]....
What I find is that I will keep getting these error message as posted in the subject... It will work for some but others I get this message. Thoughts on how to avoid that, or is that just something I'll need to work around with timing?
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