I'm not sure if something odd is happening or if this is normal, but since framework 4 when I create a new site on our IISv6 install I used to get a message saying that changing to framework 4 would cause IIS to restart (but this has gone away since a few updates ago), I think it still restarts the server when I change the framework, just no warning any more. So I did a bit of investigation and wrote a script that allowed me to switch the framework version without doing that.
#Echo Off
set /p id=Enter Site Instance:
echo %id%
C:\WINDOWS\Microsoft.NET\Framework\v4.0.30319\aspnet_regiis -norestart -s W3SVC/%id%
pause
The problem I now have occurs when I change the app pool on any given web app; it appears to cause the other app pools (including the one I add to) to refresh.
I have sometimes had instances of a switch causing every app pool to stop, and then I have to restart them all again which can cause a bit of downtime. I have taken to only release new sites early in the morning or at the end of my work day, so as to avoid as much disruption as possible, but I dont see why something like this should be happening.
The setup I have is one app pool for test, one for live and one for the admin site, but when I change a site from test to live, it will causes all the app pools to become affected.
Can anyone tell me if this is something that always happened with previous versions of the framework and if there is a possible work around, for example can I script the app pool switch without affecting any of the other app pools
Edit 2011-08-01
found this article: http://msdn.microsoft.com/en-us/library/k6h9cz8h%28VS.80%29.aspx,
which mentions a script called iisapp and looks like it might do the job, will investigate more.
Found the answer on this site: http://forums.iis.net/t/1152572.aspx
using a vbs in adminscripts called adsutil (not the iisapp as I thought...) you can write the following in a batch file.
#Echo Off
set /p id=Enter Site Name:
echo %id%
CD /D C:\inetpub\AdminScripts
Cscript.exe /nologo adsutil.vbs set W3SVC/%id%/root/apppoolid [APP POOL NAME]
Related
I use IIS Support at development-time.
Its works.
But often are hangs.
I kill the "dotnet" process and continue work
How solve a hangs?
How enable logs to detect problem?
I am not really sure what you mean with the term hangs but if you want to enable logging on IIS please take a look at the following post. At a minimum, change the stdoutLogEnabled property to true and do not forget to manually create a folder called logs at the same level as the web.config file.
When running a web deploy to a specific IIS site I get the following error:
Error: The synchronization is being stopped because the maximum number of sync passes '5' has been exceeded even though all the changes could not be applied. This could occur if there are external changes being made to the destination.
At C:\Code\.....\deploy.ps1:185 char:10
+ & <<<< ($appDeployCmd) $type /M:$url /U:$user /P:$pass /A:Basic -allowUntrusted -useCheckSum
+ CategoryInfo : NotSpecified: (Error: The sync...he destination.:String) [], RemoteException
+ FullyQualifiedErrorId : NativeCommandError
Web Deploy is working fine on this environment against other IIS sites and file syncs are also working. I have previously been able to use web deploy to deploy this specific site without issue. All of the sudden out of nowhere, this issue started happening and I can no longer deploy this site.
I'm doing a basic site deploy with a package built from msbuild. I don't think the specifics are that important because as I said this was all working before and currently works against other sites on the same server farm without issues.
The error message says:
"This could occur if there are external changes being made to the destination."
but I'm not sure how to track this down or if it is even the issue to begin with. I've made sure all explorer windows are closed in all remote sessions. I've tried restarting the site and the app pool. The only thing I have not tried is rebooting the server which is not possible at moment.
Any ideas what might be cause this web deploy to fail?
I had the same error and the problem was my dropbox.
I was working directly in my dropbox folder, and when you publish, it causes dropbox to syncronize at the same time, which caused the error.
Disabling dropbox sync while working solved the problem.
I recon the problem also could happen with onedrive, google drive and so on.
We had this problem when converting from a previously adhoc deploy of a service to MSDeploy, and found that if there were files that were either
marked as read-only via the DOS/Windows read-only file attribute.
inaccessible due to ACLs
then we would get the "maximum number of sync passes" error on deploying.
Once we fixed the attributes/ACLs, we were able to sync.
Quick and easy way to resolve this issue is to delete the files in the destination and re-run the web deploy.
The issue seems to revolve around the ACL step of the web deploy, which attempts to change the permissions of your websites files as a safety measure intended to ensure they are not changed during a deployment.
By default Web Deploy sets the ACL of the sites anonymous user to read only while also overwriting Control Panel access to your website.
Source
You can turn of ACL in future to avoid this if you wish, but it's not really worth it. This will also speed up web deploys - but that is a separate issue.
Not really an answer, but one workaround you can try if you are using the Web Deploy dirPath, filePath, or contentPath providers is the ignoreErrors provider setting. If you know that you are consistently hitting a certain error number, you can specify that that error be ignored when it's hit. See the dirPath provider article for full details (and caveats).
In my case I couldn't fix it but realised the deployment worked regardless.
If you are reading this I wouldn't suggest to just assume it worked, and if it did that it deployed fully, but consider that it may be a false alarm!
We have scaled-out some portions of our ASP.NET app to run on one server, and other portions to run on another server (& under a subdomain).
The two servers share (SQL Server) Session. We used this MS article to create a tiny HTTP Module to sync app domain name between the two servers (sans the cookie domain code, which can be configured in the web.config. I later found this CodeProject article which is essentially the same.)
Everything's working well, except for a small issue: deployment changes or web.config tweaks require a manual app pool recycle (the auto-recycle no longer works - instead we get the "web server is currently unavailable / hit refresh" error).
I tried moving the app domain naming code from the HTTP Module into the Application_Start section of the Global.asax (maybe this is a better place for it?) - but received the same problem.
I know that one solution is to hard-code the app name in one of the SQL Server Session stored procedures; but am a bit hesitant to do this.
Edit: The app is ASP.NET 3.5 under IIS 6.0 (thanks #Chris & #bzlm)
You should check if proper Recycling Events are turned on in IIS, maybe this can help http://support.microsoft.com/kb/332088
Update. We opened a tech support case with Microsoft about this. After a week or so of back & forth, they said they had reproduced the issue in their environment and understand the cause (a timing issue deep inside the ASP.NET internals) - but that there is no resolution that they're aware of. I complained that the HTTP module is Microsoft code, but they said that this code is under "FAST PUBLISH" terms - intended to help & advise customers; yet not warranted.
Ah well. We now just manually recycle the app pool after making a web.config change.
I'm having a bit of a problem where in the HttpContext.Current.Session object appears to be being destroyed between page requests and posts. I'm a bit confused as in my development environment this isn't a problem yet in a stg environment it happens.
Now I have checked all of the common problems and so far nothing seems to resolve the problem. Both dev and stg environments are the same (same iis, same versions of .net, same os and configs, all patches upto date). The web.config also matches up in both environments and the sessionState is set as follows:
<sessionState mode="InProc" timeout="15"/>
On top of this all pages that require the session context all inherit from
IRequiresSessionContext
To be sure I've also checked the IIS setup and have confimred that SessionState is enabled on the application as well.
At a loss, and no more hair to pull out.
I've run into this issue before, check the Windows Event Log to ensure that the Worker Process is not being forced to recycle.
There may be something in your code that causes the Worker Process to force itself to recycle or crash in which case when the session is stored inProc it will loose all session values it's holding.
I am currently experiencing some instability in my session variables and believe the app pool is where the error is coming from. What I cannot find is a list of possible culprits for the issue. What can cause the app pool to recycle on its own, other than a scheduled recycle?
Common reasons why your application pool may unexpectedly recycle
EDIT: Full Text in the event that the link goes 404:
If your application crashes, hangs and deadlocks it will cause/require the application pool to recycle in order to be resolved, but sometimes your application pool inexplicably recycles for no obvious reason. This is usually a configuration issue or due to the fact that you're performing file system operations in the application directory.
For the sake of elimination I thought I'd list the most common reasons.
Application pool settings
If you check the properties for the application pool you'll see a number of settings for recycling the application pool. In IIS6 they are:
Recycle worker processes (in minutes)
Recycle worker process (in requests)
Recycle worker processes at the following times
Maximum virtual memory
Maximum used memory
These settings should be pretty self explanatory, but if you want to read more, please take a look at this MSDN article
The processModel element of machine.config
If you're running IIS5 or the IIS5 isolation mode you'll have to look at the processModel element. The Properties you should pay the closest attention to are:
memoryLimit
requestLimit
timeout
memoryLimit
The default value of memoryLimit is 60. This value is only of interest if you have fairly little memory on a 32 bit machine. 60 stands for 60% of total system memory. So if you have 1 GB of memory the worker process will automatically restart once it reaches a memory usage of 600 MB. If you have 8 GB, on the other hand, the process would theoretically restart when it reaches 4,8 GB, but since it is a 32 bit process it will never grow that big. See my post on 32 bit processes for more information why.
requestLimit
This setting is "infinite" by default, but if it is set to 5000 for example, then ASP.NET will launch a new worker process once it's served 5000 requests.
timeout
The default timeout is "infinite", but here you can set the lifetime of the worker process. Once the timeout is reached ASP.NET will launch a new worker process, so setting this to "00:05:00" would recycle the application every five minutes.
Other properties
There are other properties within the processModel element that will cause your application pool to recycle, like responseDeadlockInterval. But these other settings usually depend on something going wrong or being out of the ordinary to trigger. If you have a deadlock then that's your main concern. Changing the responseDeadlockInterval setting wouldn't do much to resolve the situation. You'd need to deal with the deadlock itself.
Editing and updating
ASP.NET 2.0 depends on File Change Notifications (FCN) to see if the application has been updated. Depending on the change the application pool will recycle. If you or your application is adding and removing directories to the application folder, then you will be restarting your application pool every time, so be careful with those temporary files.
Altering the following files will also trigger an immediate restart of the application pool:
web.config
machine.config
global.asax
Anything in the bin directory or it's sub-directories
Updating the .aspx files, etc. causing a recompile will eventually trigger a restart of the application pool as well. There is a property of the compilation element under system.web that is called numRecompilesBeforeAppRestart. The default value is 20. This means that after 20 recompiles the application pool will recycle.
A workaround to the sub-directory issue
If your application really depends on adding and removing sub-directories you can use linkd to create a directory junction. Here's how:
Create a directory you'd like to exclude from the FCN, E.g. c:\inetpub\wwwroot\WebApp\MyDir
Create a separate folder somewhere outside the wwwroot. E.g. c:\MyExcludedDir
use linkd to link the two: linkd c:\inetpub\wwwroot\WebApp\MyDir c:\MyExcludedDir
Any changes made in the c:\inetpub\wwwroot\WebApp\MyDir will actually occur in c:\MyExcludedDir so they will go unnoticed by the FCN.
Is recycling the application pool really that bad?
You really shouldn't have to recycle the application pool, but if you're dealing with a memory leak in your application and need to buy time to fix it, then by all means recycling the application pool could be a good idea.
What about session state?
Well, if you're running in-process session state, then obviously it's going to be reset each and every time the application pool is recycled. If you need to brush up on your state server options, then I recommend taking a look at this entry.