[SerializationException: The ObjectManager found an invalid number of fixups. This usually indicates a problem in the Formatter.]

[SerializationException: The ObjectManager found an invalid number of fixups. This usually indicates a problem in the Formatter.]
System.Runtime.Serialization.ObjectManager.DoFixups() +14053613
System.Runtime.Serialization.Formatters.Binary.ObjectReader.Deserialize(HeaderHandler handler, __BinaryParser serParser, Boolean fCheck, Boolean isCrossAppDomain, IMethodCallMessage methodCallMessage) +194
System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.Deserialize(Stream serializationStream, HeaderHandler handler, Boolean fCheck, Boolean isCrossAppDomain, IMethodCallMessage methodCallMessage) +285
Microsoft.Web.Redis.BinarySerializer.Deserialize(Byte[] data) in d:\TeamCityBuildAgent\work\f55792526e6d9089\src\Shared\BinarySerializer.cs:39
Microsoft.Web.Redis.StackExchangeClientConnection.GetSessionData(Object rowDataFromRedis) in d:\TeamCityBuildAgent\work\f55792526e6d9089\src\Shared\StackExchangeClientConnection.cs:235
Microsoft.Web.Redis.RedisConnectionWrapper.TryTakeWriteLockAndGetData(DateTime lockTime, Int32 lockTimeout, Object& lockId, ISessionStateItemCollection& data, Int32& sessionTimeout) in d:\TeamCityBuildAgent\work\f55792526e6d9089\src\RedisSessionStateProvider\RedisConnectionWrapper.cs:196
Microsoft.Web.Redis.RedisSessionStateProvider.GetItemFromSessionStore(Boolean isWriteLockRequired, HttpContext context, String id, Boolean& locked, TimeSpan& lockAge, Object& lockId, SessionStateActions& actions) in d:\TeamCityBuildAgent\work\f55792526e6d9089\src\RedisSessionStateProvider\RedisSessionStateProvider.cs:276
Microsoft.Web.Redis.RedisSessionStateProvider.GetItemExclusive(HttpContext context, String id, Boolean& locked, TimeSpan& lockAge, Object& lockId, SessionStateActions& actions) in d:\TeamCityBuildAgent\work\f55792526e6d9089\src\RedisSessionStateProvider\RedisSessionStateProvider.cs:190
System.Web.SessionState.SessionStateModule.GetSessionStateItem() +176
System.Web.SessionState.SessionStateModule.BeginAcquireState(Object source, EventArgs e, AsyncCallback cb, Object extraData) +980
System.Web.AsyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +636
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +137

Does anyone know what this means? Is it a limitation with the way serialization works?

Hi
I'm having problems getting this nuget to work, I've reinstalled the nuget multiple times but still getting the same " Could not load type 'Microsoft.Web.Redis.RedisSessionStateProvider'." error.

Any idea why?

<add name="MySessionStateStore"
host = "127.0.0.1" [String]
port = "" [number]
accessKey = "" [String]
ssl = "false" [true|false]
throwOnError = "true" [true|false]
retryTimeoutInMilliseconds = "0" [number]
databaseId = "0" [number]
applicationName = "" [String]
connectionTimeoutInMilliseconds = "5000" [number]
operationTimeoutInMilliseconds = "5000" [number]

.....

How to write redis connectstring in c# code?

Session state supposedly is disabled by default in MVC ApiController, indeed HttpContext.Current.Session is null, however in load testing I'm seeing these exceptions, which are expected, however they occur for requests that are on the API controller, seems to me BeginAcquireState should never even be called.

This is caught in Application_Error where the current request shows it's an ApiController request.

Seems that session state is only half disabled for ApiControllers and sliding expiration updates still occur? Will [SessionState(System.Web.SessionState.SessionStateBehavior.Disabled)] disable it fully?

Exception : System.TimeoutException: Timeout performing EVAL, inst: 0, mgr: Inactive, err: never, queue: 0, qu: 0, qs: 0, qc: 0, wr: 0, wq: 0, in: 0, ar: 0, clientName: Teleport.WebUX_IN_0, serverEndpoint: Unspecified/testing.redis.cache.windows.net:6380, keyHashSlot: 3266, IOCP: (Busy=1,Free=999,Min=50,Max=1000), WORKER: (Busy=42,Free=32725,Min=50,Max=32767), Local-CPU: 100% (Please take a look at this article for some common client-side issues that can cause timeouts: https://github.com/StackExchange/StackExchange.Redis/tree/master/Docs/Timeouts.md) at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor1 processor, ServerEndPoint server) at StackExchange.Redis.RedisBase.ExecuteSync[T](Message message, ResultProcessor1 processor, ServerEndPoint server) at StackExchange.Redis.RedisDatabase.ScriptEvaluate(String script, RedisKey[] keys, RedisValue[] values, CommandFlags flags) at Microsoft.Web.Redis.StackExchangeClientConnection.<>c__DisplayClass4.b__3() in d:\TeamCityBuildAgent\work\f55792526e6d9089\src\Shared\StackExchangeClientConnection.cs:line 119 at Microsoft.Web.Redis.StackExchangeClientConnection.RetryForScriptNotFound(Func1 redisOperation) in d:\TeamCityBuildAgent\work\f55792526e6d9089\src\Shared\StackExchangeClientConnection.cs:line 137 at Microsoft.Web.Redis.StackExchangeClientConnection.RetryLogic(Func1 redisOperation) in d:\TeamCityBuildAgent\work\f55792526e6d9089\src\Shared\StackExchangeClientConnection.cs:line 161 at Microsoft.Web.Redis.StackExchangeClientConnection.Eval(String script, String[] keyArgs, Object[] valueArgs) in d:\TeamCityBuildAgent\work\f55792526e6d9089\src\Shared\StackExchangeClientConnection.cs:line 119 at Microsoft.Web.Redis.RedisConnectionWrapper.UpdateExpiryTime(Int32 timeToExpireInSeconds) in d:\TeamCityBuildAgent\work\f55792526e6d9089\src\RedisSessionStateProvider\RedisConnectionWrapper.cs:line 90 at Microsoft.Web.Redis.RedisSessionStateProvider.ResetItemTimeout(HttpContext context, String id) in d:\TeamCityBuildAgent\work\f55792526e6d9089\src\RedisSessionStateProvider\RedisSessionStateProvider.cs:line 298 at System.Web.SessionState.SessionStateModule.BeginAcquireState(Object source, EventArgs e, AsyncCallback cb, Object extraData) at System.Web.HttpApplication.AsyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) TraceSource="w3wp.exe"

In nutshell, it looks like assigning Session by some "key" looks case-sensitive, so that it can be resulted in not empty Session after Session.Clear().

I've described issue in details here: http://stackoverflow.com/questions/32955349/redis-session-state-provider-feature-or-bug.

I'm using Microsoft.Web.RedisSessionStateProvider.2.2.4 and is dependent on StackExchange.Redis.StrongName - 1.1.608, this dependency is installed with nuget, But when I run my application its trying to use StackExchange.Redis.StrongName - 1.2.1.0.

Any suggestion?

Could not load file or assembly 'StackExchange.Redis.StrongName, Version=1.2.1.0, Culture=neutral, PublicKeyToken=c219ff1ca8c2ce46' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. 

Exception Details: System.IO.FileLoadException: Could not load file or assembly 'StackExchange.Redis.StrongName, Version=1.2.1.0, Culture=neutral, PublicKeyToken=c219ff1ca8c2ce46' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)

In the nuget.org page ( https://www.nuget.org/packages/Microsoft.Web.RedisSessionStateProvider/ ),
there is a link to the license ( https://www.microsoft.com/web/webpi/eula/aspnetcomponent_rtw_enu.htm ). But it is not the MIT License.

Is the license link in nuget.org page wrong?
Should it be linked to the MIT Liscense?

We'd like to have two instances of the RedisSessionStateProvider, so that we can place a replicating session state provider over the top. We want to push writes through both providers and read from the primary. The reason for this is to maintain session state caches in two Azure data centers, so that when we flip front-ends between data centers customer's sessions aren't broken.
This currently isn't possible because the configuration object is static and therefore shared between all instances of the session provider.
Is there any reason why multiple providers couldn't be supported? Or is there a better way to support our use case?

Background
I have a web app that I am refactoring to use Redis session state. I also have some other application state that I would like to use Redis for, and have created a basic implementation using StackExchange.Redis client. I am also using a Sentinel-based architecture to provide master-slave failover, so there are multiple hosts listed in the connection string.

Problem
I don't want to have to define the connection string in two places, I want to get hold of either the connection string from the Redis session state provider, or maybe even better, get hold of the underlying Redis connection.
I notice the OutputCache provider does not have a ConnectionString configuration property, so is that not inconsistent with the Session state provider?

Workarounds?
Read the session state provider config to obtain the connectionstring value.
I don't think this is a particularly great solution.

Possible solutions?
a) the provider exposes a public method to get the underlying StackExchange.Redis connection
b) the provider has an additional configuration attribute (eg connectionStringName), which is the name of a connection string in the usual configuration element.

When I add varyByParam = "None" in outputCacheProfiles the outputcache does not ignore the parameters that are added in the url, the redis cache stores another record.

I'm facing problem when I tried to use redis as session session server for the below configuration:

1. Two windows servers hosting same application
2. Elastic load balancer with weighted routing redirects requests to the 2 IIS servers
3. Redis is hosted in AWS elastic-cache and accessible from both servers
4. Redis serves as a session server for 1 server at a time without any issue

for each session 3 keys are created
"{/_kktffpxxxxxxg2xixdnhe}_Write_Lock"
"{/_kktffpxxxxxxg2xixdnhe}_Data"
"{/_kktffpxxxxxxg2xixdnhe}_Internal"

Issue: When 1+ servers try to serve same user, by accessing session from redis at same instance, if 1 server have placed "_Write_Lock" then the other server fails to write the data and after that it cleares the key --> result, the user's next request to any server fails to verify his/her session.

Am i the only one who gets this issue ??

Note: With session stickiness enabled in ELB the signout is not intermittent, however that restricts us to take out a server for upgradation without loosing all user sessions for that server.

hi, i have a problem with [connectionString] , i think [defaultDatabase ] attribute in [connectionString] is no use, aspnet-redis-providers still use [databaseId] to read the database.

LS,

I have implemented the Redis OutputCache using the Azure Redis service.

On top of the pages need to cache:
<%@ OutputCache VaryByParam="*" Duration="600" %>

After access a random page and I check the key in Redis database is has saved like:
/_a2/monitor.aspxHQNactionVtestFCDE

So running the below line of code, will remove this cache item (and it worked).
HttpResponse.RemoveOutputCacheItem("/monitor.aspx?action=test", "RedisOutputCache")

Now I have updated the same page adding the varyByCustom the the OutputCache directive:
<%@ OutputCache VaryByParam="*" varyByCustom="userhash" Duration="600" %>

Now accessing the page and checking the key in Redis database it is saved like:
/_a2/monitor.aspxHQNactionVtestFCNuserhashVcc6ef5b7173286704cef942d5577b88bd81f2cce71a0dcdc8676d3a815e68b59DE

You see the added userhash hash value, this is nice and worked as axpected.
But now here comes the problem: How do I clear this cache item.

This is not working:
HttpResponse.RemoveOutputCacheItem("/monitor.aspx?action=test", "RedisOutputCache")

Also tried:
HttpResponse.RemoveOutputCacheItem("/monitor.aspx?action=test&userhash=cc6ef5b7173286704cef942d5577b88bd81f2cce71a0dcdc8676d3a815e68b59", "RedisOutputCache")

And also tried:
HttpResponse.RemoveOutputCacheItem("/monitor.aspx?action=test {userhash:cc6ef5b7173286704cef942d5577b88bd81f2cce71a0dcdc8676d3a815e68b59}", "RedisOutputCache")

Is there an way to remove this cache item on using the varyByCustom option?

Any help is most welcome!

Joël

I have an web app where terminal-sharing is a common case. When i user logs out I HttpSession.Abandon(), but the underlying connection to redis does not close, so when another user logs in, another connection get's up... and if the previous user gets back, the connection is not re-used, and yet another one is freshly provided...

I get the above error occasionally in my all environments.

I have to restart the site whenever this happens. I check my redis nodes and they did not elect a new master. Has anyone seen this error before?

Exception Message:
ERR Error running script (call to f_71fe2e7962348b06aa8ce3e244cdb3f774b4f549): @user_script:4: @user_script: 4: -READONLY You can't write against a read only slave.

Exception StackTrack:
at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor1 processor, ServerEndPoint server) in c:\TeamCity\buildAgent\work\3ae0647004edff78\StackExchange.Redis\StackExchange\Redis\ConnectionMultiplexer.cs:line 1835 at StackExchange.Redis.RedisBase.ExecuteSync[T](Message message, ResultProcessor1 processor, ServerEndPoint server) in c:\TeamCity\buildAgent\work\3ae0647004edff78\StackExchange.Redis\StackExchange\Redis\RedisBase.cs:line 80
at StackExchange.Redis.RedisDatabase.ScriptEvaluate(String script, RedisKey[] keys, RedisValue[] values, CommandFlags flags) in c:\TeamCity\buildAgent\work\3ae0647004edff78\StackExchange.Redis\StackExchange\Redis\RedisDatabase.cs:line 875
at Microsoft.Web.Redis.StackExchangeClientConnection.<>c__DisplayClass4.b__3() in c:\TeamCity\buildAgent\work\f55792526e6d9089\src\Shared\StackExchangeClientConnection.cs:line 113
at Microsoft.Web.Redis.StackExchangeClientConnection.RetryForScriptNotFound(Func1 redisOperation) in c:\TeamCity\buildAgent\work\f55792526e6d9089\src\Shared\StackExchangeClientConnection.cs:line 131 at Microsoft.Web.Redis.StackExchangeClientConnection.RetryLogic(Func1 redisOperation) in c:\TeamCity\buildAgent\work\f55792526e6d9089\src\Shared\StackExchangeClientConnection.cs:line 155
at Microsoft.Web.Redis.StackExchangeClientConnection.Eval(String script, String[] keyArgs, Object[] valueArgs) in c:\TeamCity\buildAgent\work\f55792526e6d9089\src\Shared\StackExchangeClientConnection.cs:line 113
at Microsoft.Web.Redis.RedisConnectionWrapper.TryTakeWriteLockAndGetData(DateTime lockTime, Int32 lockTimeout, Object& lockId, ISessionStateItemCollection& data, Int32& sessionTimeout) in c:\TeamCity\buildAgent\work\f55792526e6d9089\src\RedisSessionStateProvider\RedisConnectionWrapper.cs:line 182
at Microsoft.Web.Redis.RedisSessionStateProvider.GetItemFromSessionStore(Boolean isWriteLockRequired, HttpContext context, String id, Boolean& locked, TimeSpan& lockAge, Object& lockId, SessionStateActions& actions) in c:\TeamCity\buildAgent\work\f55792526e6d9089\src\RedisSessionStateProvider\RedisSessionStateProvider.cs:line 272
at Microsoft.Web.Redis.RedisSessionStateProvider.GetItemExclusive(HttpContext context, String id, Boolean& locked, TimeSpan& lockAge, Object& lockId, SessionStateActions& actions) in c:\TeamCity\buildAgent\work\f55792526e6d9089\src\RedisSessionStateProvider\RedisSessionStateProvider.cs:line 190
at System.Web.SessionState.SessionStateModule.GetSessionStateItem()
at System.Web.SessionState.SessionStateModule.PollLockedSessionCallback(Object state)

Hi,

Redis recommends only having one connection per instance. At the current time there is no way to inject an instance, nor collect the instance created by the session handler. One workaround would be access to the ProviderConfiguration and reuse the try get connection code.

Could you either open this up or give other means of reusing the same connection for an application?

Preferably the ability to inject or presetup the connection so it can be closed on app shutdown as well, as this does not happen today.

I have this in my web.config

    <sessionState mode="Custom" customProvider="SessionStateStore">
      <providers>
        <add port="" applicationName="SigntulSession" name="SessionStateStore" type="Microsoft.Web.Redis.RedisSessionStateProvider" host="localhost" accessKey="" ssl="false" throwOnError="true" />
      </providers>
    </sessionState>

Always when update the NuGet I get the example in my web.config and the app stops working until I deleted

So whats the logic for that and how can avoid this?

Thank you

System.TimeoutException: Timeout performing EVAL, inst: 1, mgr: ExecuteSelect, err: never, queue: 0, qu: 0, qs: 0, qc: 0, wr: 0, wq: 0, in: 0, ar: 0, IOCP: (Busy=0,Free=1000,Min=4,Max=1000), WORKER: (Busy=21,Free=32746,Min=4,Max=32767), clientName

AWS Ec2, AWS Redis.

Are there any plans to support the release of the ASP.Net Async SessionState? I would love to use the async version of the SessionState provider for Redis!

Thanks

Currently, Redis does not use Dependency Tracking for Application Insights, and we have seen many issues related to Redis timeouts and network latency that would be much easier to debug and see if dependency tracking was built into this provider.

I'm experiencing an issue with client side caching where I'm unable to add values to the session after long running async calls (180000 ms or more). When I remove the async call, I can add values again. Any suggestions?

can set the failure time of session in webconfig file ?

We had the following error, that didn't occur anymore after we restarted the app.

Exception information:
Exception type: RedisConnectionException
Exception message: It was not possible to connect to the redis server(s); to create a disconnected multiplexer, disable AbortOnConnectFail. ConnectTimeout

The app wasn't functioning while we had this error.

Is there a possibility to fallback to InProc until this issue is fixed?

Allow redis session provider to use connection string from <connectionStrings> section in web.config.

Is there any current or future plans to support providing endpoints to target read replicas from a redis cluster?

Thanks!

Would you be open to me submitting a pull request to allow for a more flexible KeyGenerator? Essentially, I would like to have more flexible key naming that would align with my company's naming convention.

Hi all –

We were attempting to place some older classes to the session using this provider and hitting null reference exceptions when our classes would reconstruct during deserialization.

We discovered that:

1. These classes look for values in HttpContext.Current.Items in their constructors
2. HttpContext is not thread-safe
3. Deserialization (and reconstruction) takes place in a new thread where HttpContext.Current is null

The temporary fix:
We noticed thatRedisSessionStateProvider already passes around the "true" HttpContext between its own methods, but never sets the new thread's HttpContext.Current to the passed around reference.

In RedisSessionStateProvider.GetItemFromSessionStore, we set HttpContext.Current = context (context being the reference that's passed in to GetItemFromSessionStore). Our classes can than happily re-instantiate as they find the values where they expect them.

I'm not sure if that's the best solution overall. Does it make sense to set the HttpContext.Current at all in a new thread? Perhaps there's a better way to achieve this. I imagine we want to document this issue though for future users who may need to store legacy classes in the session.

Let me know if you have any questions or repro steps. Thanks.

Hello,

I'm trying to use your provider in my mvc project but when i try to debug my contoller action i see the caching is not working.

And when i read my debug output i can see this error :
Exception thrown: 'System.IO.FileNotFoundException' in Microsoft.Web.RedisOutputCacheProvider.dll

How can i know what is missing ?

This is my caching web.config section :

<caching>
      <outputCache defaultProvider="MyRedisOutputCache" enableOutputCache="true">
          <providers>
              <add name="MyRedisOutputCache" host="192.168.100.168" port="6379" databaseId="2"
                        accessKey="" applicationName="LocalOutputCache" ssl="false"
                        type="Microsoft.Web.Redis.RedisOutputCacheProvider, Microsoft.Web.RedisOutputCacheProvider" />
          </providers>
      </outputCache>
      <outputCacheSettings>
        <outputCacheProfiles>
          <add name="Standard" duration="3600" varyByParam="*" />
          <add name="Static" duration="43200" varyByParam="None" />
        </outputCacheProfiles>
      </outputCacheSettings>
    </caching>

Thanks.

The Redis Cache supports the Redis Keyspace Notifications feature starting from version 2.8.0, which is used by Azure Redis Cache service. Now clients can subscribe on Expired events (events generated every time a key expires) to be notified when an entry is expired.

It would be handy if the Microsoft.Web.RedisSessionStateProvider supported the Session_End event, using the Redis Keyspace Notifications feature.

I´m using Redis Session State Provider but when i debugging ocurrs the error

Looking source 'd:\TeamCityBuildAgent\work\f55792526e6d9089\src\Shared\ChangeTrackingSessionStateItemCollection.cs'. Checksum: MD5 {9 f0 b2 17 4d 58 c2 a7 68 b7 2c 14 c1 5e 20 85}
File 'd:\TeamCityBuildAgent\work\f55792526e6d9089\src\Shared\ChangeTrackingSessionStateItemCollection.cs' does not exist.
Searching 'd:\TeamCityBuildAgent\work\f55792526e6d9089\src\Shared\ChangeTrackingSessionStateItemCollection.cs' at documents scripts...
Looking at projects 'd:\TeamCityBuildAgent\work\f55792526e6d9089\src\Shared\ChangeTrackingSessionStateItemCollection.cs'.
The file was not found on a project.
Searching the directory 'C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\crt\src'...
Searching the directory 'C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\crt\src\vccorlib'...
Searching the directory 'C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\atlmfc\src\mfc'...
Searching the directory 'C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\atlmfc\src\atl'...
Searching the directory 'C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\atlmfc\include'...
Searching the directory 'C:'...
The configuration file debugging source code for the active solution indicate that the debugger does not prompt the user to search the file: d:\TeamCityBuildAgent\work\f55792526e6d9089\src\Shared\ChangeTrackingSessionStateItemCollection.cs.
The debugger can not find the source file 'd:\TeamCityBuildAgent\work\f55792526e6d9089\src\Shared\ChangeTrackingSessionStateItemCollection.cs'.

Is there a way to configure the SessionStateProvider programmatically ?

More specifically, I would like to change the host address and the accessKey.

I tried to implement my own SessionModule (as shown here) and getting the SessionStateStoreProviderBase through reflection (as shown here), but that's cumbersome and I am not sure if that's going to work in the end.

In short, the reason I want to do this, is that I have different environments where I want to deploy my application, and in my case, it would be more convenient to do it like this than with a Web.Config transform.

Thank you,
Guillaume

We have implemented Azure Redis Cache as our Session State provider to replace SQL Server provider. In testing we saw no issues but now live we are getting the following error in small batches;

Exception has been thrown by the target of an invocation.
at System.RuntimeMethodHandle.SerializationInvoke(IRuntimeMethodInfo method, Object target, SerializationInfo info, StreamingContext& context)
at System.Runtime.Serialization.ObjectManager.CompleteISerializableObject(Object obj, SerializationInfo info, StreamingContext context)
at System.Runtime.Serialization.ObjectManager.FixupSpecialObject(ObjectHolder holder)
at System.Runtime.Serialization.ObjectManager.DoFixups()
at System.Runtime.Serialization.Formatters.Binary.ObjectReader.Deserialize(HeaderHandler handler, __BinaryParser serParser, Boolean fCheck, Boolean isCrossAppDomain, IMethodCallMessage methodCallMessage)
at System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.Deserialize(Stream serializationStream, HeaderHandler handler, Boolean fCheck, Boolean isCrossAppDomain, IMethodCallMessage methodCallMessage)
at System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.Deserialize(Stream serializationStream, HeaderHandler handler, Boolean fCheck, IMethodCallMessage methodCallMessage)
at Microsoft.Web.Redis.RedisUtility.GetObjectFromBytes(Byte[] dataAsBytes) in c:\TeamCity\buildAgent\work\f55792526e6d9089\src\Shared\RedisUtility.cs:line 84
at Microsoft.Web.Redis.StackExchangeClientConnection.GetSessionDataStatic(Object rowDataFromRedis) in c:\TeamCity\buildAgent\work\f55792526e6d9089\src\Shared\StackExchangeClientConnection.cs:line 235
at Microsoft.Web.Redis.RedisConnectionWrapper.TryTakeWriteLockAndGetData(DateTime lockTime, Int32 lockTimeout, Object& lockId, ISessionStateItemCollection& data, Int32& sessionTimeout) in c:\TeamCity\buildAgent\work\f55792526e6d9089\src\RedisSessionStateProvider\RedisConnectionWrapper.cs:line 193
at Microsoft.Web.Redis.RedisSessionStateProvider.GetItemFromSessionStore(Boolean isWriteLockRequired, HttpContext context, String id, Boolean& locked, TimeSpan& lockAge, Object& lockId, SessionStateActions& actions) in c:\TeamCity\buildAgent\work\f55792526e6d9089\src\RedisSessionStateProvider\RedisSessionStateProvider.cs:line 272
at Microsoft.Web.Redis.RedisSessionStateProvider.GetItemExclusive(HttpContext context, String id, Boolean& locked, TimeSpan& lockAge, Object& lockId, SessionStateActions& actions) in c:\TeamCity\buildAgent\work\f55792526e6d9089\src\RedisSessionStateProvider\RedisSessionStateProvider.cs:line 190
at System.Web.SessionState.SessionStateModule.GetSessionStateItem()
at System.Web.SessionState.SessionStateModule.PollLockedSessionCallback(Object state)

Any ideas what could be causing this or how to debug further?

Thanks, Darren

Can we also support reading configurations from azure cloud service configuration file (.csfg)?

I am unable to install this package. Not sure why. I have a project that I just opened VS 2015 and has various NuGet packages and they all installed OK but this one. Trying to install it through the Package Manager and I keep getting this error.

I opened VS as the Administrator and still get the same error. Below is the output.

Attempting to gather dependencies information for package 'Microsoft.Web.RedisSessionStateProvider.1.6.5' with respect to project 'Client\XXXX.Admin.Host', targeting '.NETFramework,Version=v4.6'
Attempting to resolve dependencies for package 'Microsoft.Web.RedisSessionStateProvider.1.6.5' with DependencyBehavior 'Lowest'
Resolving actions to install package 'Microsoft.Web.RedisSessionStateProvider.1.6.5'
Resolved actions to install package 'Microsoft.Web.RedisSessionStateProvider.1.6.5'
Install failed. Rolling back...
Package 'Microsoft.Web.RedisSessionStateProvider 1.6.5' does not exist in project 'XXXX.Admin.Host'
Package 'Microsoft.Web.RedisSessionStateProvider 1.6.5' does not exist in folder 'C:\DEV\Repos\XXXX.Admin\packages'
System.NullReferenceException: Object reference not set to an instance of an object.
at NuGet.Protocol.Core.v3.GlobalPackagesFolderUtility.d__1.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
at NuGet.Protocol.Core.v3.DownloadResourceV3.d__4.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at NuGet.PackageManagement.PackageDownloader.d__1.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task)
at NuGet.PackageManagement.NuGetPackageManager.d__42.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at NuGet.PackageManagement.NuGetPackageManager.d__42.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at NuGet.PackageManagement.UI.UIActionEngine.d__5.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at NuGet.PackageManagement.UI.UIActionEngine.d__3.MoveNext()

Below is a screen shot of installing it from Console:

Hello,

I work on a heavy traffic website and I canary deployed the redis session state provider on one webserver.
As soon as I deployed it I noticed errors popping up in my log:

"System.ArgumentException","Message":"An item with the same key has already been added"

and the stack trace says:
"StackTraceString":" at System.ThrowHelper.ThrowArgumentException(ExceptionResource resource)\r\n at System.Collections.Generic.Dictionary2.Insert(TKey key, TValue value, Boolean add)\r\n at Microsoft.Web.Redis.ChangeTrackingSessionStateItemCollection.GetSessionNormalizedKeyToUse(String name) in d:\TeamCityBuildAgent\work\f55792526e6d9089\src\Shared\ChangeTrackingSessionStateItemCollection.cs:line 33\r\n at Microsoft.Web.Redis.ChangeTrackingSessionStateItemCollection.get_Item(String name) in d:\TeamCityBuildAgent\work\f55792526e6d9089\src\Shared\ChangeTrackingSessionStateItemCollection.cs:line 142\r\n`

The result was that I got requests hanging indefinetely in the app pool worker process, causing the app pool to use lots of CPU and had to rollback changes.

This is happening on the home page, when the user requests the page and the JS in the page performs an Ajax requests to load some data.
Both requests pass through some base controller logic which uses the session (same key) and which from time to time causes this race condition when a thread tries to find an entry and another write.

I noticed that the dictionary used in the ChangeTrackingSessionStateItemCollection.cs is not a thread safe data structure, so maybe that's the reason?
Please have a look at this Stack Overflow question for more info on why the race condition.

This is a screenshot of an analyzed set of data from PerfView which shows clearly the same case as the one describe in the SO question above:

What do you think?

As title says.
Any plans to release version that supports async methods introduced in .NET 4.6.2 ?

Thanks

We sometimes - very infrequently, but sometimes - get an error about the DynamicProxies assembly generated by Entity Framework when using the RedisSessionStateProvider.

Here is the error, including stack trace:

Server Error in '/' Application.

Unable to find assembly 'EntityFrameworkDynamicProxies-MyDataDll, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'. 
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. 

Exception Details: System.Runtime.Serialization.SerializationException: Unable to find assembly 'EntityFrameworkDynamicProxies-MyDataDll, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'.

Source Error: 

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below. 

Stack Trace: 

[SerializationException: Unable to find assembly 'EntityFrameworkDynamicProxies-MyDataDll, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'.]
   System.Runtime.Serialization.Formatters.Binary.BinaryAssemblyInfo.GetAssembly() +3444057
   System.Runtime.Serialization.Formatters.Binary.ObjectReader.GetType(BinaryAssemblyInfo assemblyInfo, String name) +11601726
   System.Runtime.Serialization.Formatters.Binary.ObjectMap..ctor(String objectName, String[] memberNames, BinaryTypeEnum[] binaryTypeEnumA, Object[] typeInformationA, Int32[] memberAssemIds, ObjectReader objectReader, Int32 objectId, BinaryAssemblyInfo assemblyInfo, SizedArray assemIdToAssemblyTable) +122
   System.Runtime.Serialization.Formatters.Binary.__BinaryParser.ReadObjectWithMapTyped(BinaryObjectWithMapTyped record) +286
   System.Runtime.Serialization.Formatters.Binary.__BinaryParser.ReadObjectWithMapTyped(BinaryHeaderEnum binaryHeaderEnum) +57
   System.Runtime.Serialization.Formatters.Binary.__BinaryParser.Run() +461
   System.Runtime.Serialization.Formatters.Binary.ObjectReader.Deserialize(HeaderHandler handler, __BinaryParser serParser, Boolean fCheck, Boolean isCrossAppDomain, IMethodCallMessage methodCallMessage) +120
   System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.Deserialize(Stream serializationStream, HeaderHandler handler, Boolean fCheck, Boolean isCrossAppDomain, IMethodCallMessage methodCallMessage) +186
   Microsoft.Web.Redis.RedisUtility.GetObjectFromBytes(Byte[] dataAsBytes) +121
   Microsoft.Web.Redis.StackExchangeClientConnection.GetSessionDataStatic(Object rowDataFromRedis) +219
   Microsoft.Web.Redis.StackExchangeClientConnection.GetSessionData(Object rowDataFromRedis) +7
   Microsoft.Web.Redis.RedisConnectionWrapper.TryTakeWriteLockAndGetData(DateTime lockTime, Int32 lockTimeout, Object& lockId, ISessionStateItemCollection& data, Int32& sessionTimeout) +310
   Microsoft.Web.Redis.RedisSessionStateProvider.GetItemFromSessionStore(Boolean isWriteLockRequired, HttpContext context, String id, Boolean& locked, TimeSpan& lockAge, Object& lockId, SessionStateActions& actions) +804
   Microsoft.Web.Redis.RedisSessionStateProvider.GetItemExclusive(HttpContext context, String id, Boolean& locked, TimeSpan& lockAge, Object& lockId, SessionStateActions& actions) +127
   System.Web.SessionState.SessionStateModule.GetSessionStateItem() +111
   System.Web.SessionState.SessionStateModule.PollLockedSessionCallback(Object state) +233

[HttpException (0x80004005): Exception of type 'System.Web.HttpException' was thrown.]
   System.Web.HttpAsyncResult.End() +9643911
   System.Web.SessionState.SessionStateModule.EndAcquireState(IAsyncResult ar) +39
   System.Web.AsyncEventExecutionStep.OnAsyncEventCompletion(IAsyncResult ar) +9670421


Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.6.1055.0

I'm 95% certain that none of the Entity Framework-generated objects I am storing in session are Dynamic Proxies. I've got that turned off for all the places where the objects end up in session. So I'm not sure why this error would be happening. I'm trying to do more testing to be 100% certain.

Have you seen this before? Any ideas? Any idea how to debug the problem to isolate it to certain objects?

Hello,

we receive the following exception on a regular basis in our productive system (using the RedisSessionStateProvider 1.6.5):

Exception Type: System.NullReferenceException Exception Message: Object reference not set to an instance of an object. Exception Source: mscorlib Exception Target Site: System.Type GetType() Assembly Version: v1.0.0.0 Assembly Build Date: 2016-03-18 09:40:18 ---- Stack Trace ---- System.Object.GetType() : line 0000, col 00 Microsoft.Web.Redis.StackExchangeClientConnection.Eval(script As String, keyArgs As String[], valueArgs As Object[]) : line 0000, col 00, IL 0121 Microsoft.Web.Redis.RedisConnectionWrapper.TryUpdateAndReleaseLockIfLockIdMatch(lockId As Object, data As ISessionStateItemCollection, sessionTimeout As Int32) : line 0000, col 00, IL 0028 Microsoft.Web.Redis.RedisSessionStateProvider.SetAndReleaseItemExclusive(context As HttpContext, id As String, item As SessionStateStoreData, lockId As Object, newItem As Boolean) : line 0000, col 00, IL 0294 System.Web.SessionState.SessionStateModule.OnReleaseState(source As Object, eventArgs As EventArgs) : line 0000, col 00, IL 0477 System.Web.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() : line 0000, col 00, IL 0093

I think this error occurs if the LockId Object is null. However, I am still not sure what the actual cause of the error is. Could someone please clarify this issue for me?

Thank!

If you upgrade this package, and you already have ... already defined, and customProvider is DIFFERENT (like from creating your own config that is not local host), an additional sessionState area in added in the web.config. If this package is upgraded, and sessionState is already defined it should NOT modify that part of the web.config.

this is every important?
can you?

We have upgraded latest StackExchange libraray "StackExchange.Redis.StrongName 1.1.603".

But our problem still exists. We are getting the following message randomly.

Error Details:

Message: No connection is available to service this operation: EVAL

StackTrace::
at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImplT in C:\TeamCity\buildAgent\work\3ae0647004edff78\StackExchange.Redis\StackExchange\Redis\ConnectionMultiplexer.cs:line 1968 at StackExchange.Redis.RedisBase.ExecuteSyncT in C:\TeamCity\buildAgent\work\3ae0647004edff78\StackExchange.Redis\StackExchange\Redis\RedisBase.cs:line 81 at StackExchange.Redis.RedisDatabase.ScriptEvaluate(String script, RedisKey[] keys, RedisValue[] values, CommandFlags flags) in C:\TeamCity\buildAgent\work\3ae0647004edff78\StackExchange.Redis\StackExchange\Redis\RedisDatabase.cs:line 884 at Microsoft.Web.Redis.StackExchangeClientConnection.<>c__DisplayClass4.b__3() in d:\TeamCityBuildAgent\work\f55792526e6d9089\src\Shared\StackExchangeClientConnection.cs:line 117 at Microsoft.Web.Redis.StackExchangeClientConnection.RetryForScriptNotFound(Func1 redisOperation) in d:\TeamCityBuildAgent\work\f55792526e6d9089\src\Shared\StackExchangeClientConnection.cs:line 135 at Microsoft.Web.Redis.StackExchangeClientConnection.RetryLogic(Func1 redisOperation) in d:\TeamCityBuildAgent\work\f55792526e6d9089\src\Shared\StackExchangeClientConnection.cs:line 159 at Microsoft.Web.Redis.StackExchangeClientConnection.Eval(String script, String[] keyArgs, Object[] valueArgs) in d:\TeamCityBuildAgent\work\f55792526e6d9089\src\Shared\StackExchangeClientConnection.cs:line 117 at Microsoft.Web.Redis.RedisConnectionWrapper.TryTakeWriteLockAndGetData(DateTime lockTime, Int32 lockTimeout, Object& lockId, ISessionStateItemCollection& data, Int32& sessionTimeout) in d:\TeamCityBuildAgent\work\f55792526e6d9089\src\RedisSessionStateProvider\RedisConnectionWrapper.cs:line 182 at Microsoft.Web.Redis.RedisSessionStateProvider.GetItemFromSessionStore(Boolean isWriteLockRequired, HttpContext context, String id, Boolean& locked, TimeSpan& lockAge, Object& lockId, SessionStateActions& actions) in d:\TeamCityBuildAgent\work\f55792526e6d9089\src\RedisSessionStateProvider\RedisSessionStateProvider.cs:line 272 at Microsoft.Web.Redis.RedisSessionStateProvider.GetItemExclusive(HttpContext context, String id, Boolean& locked, TimeSpan& lockAge, Object& lockId, SessionStateActions& actions) in d:\TeamCityBuildAgent\work\f55792526e6d9089\src\RedisSessionStateProvider\RedisSessionStateProvider.cs:line 190 at System.Web.SessionState.SessionStateModule.GetSessionStateItem() at System.Web.SessionState.SessionStateModule.BeginAcquireState(Object source, EventArgs e, AsyncCallback cb, Object extraData) at System.Web.HttpApplication.AsyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

Please help.

We are using this with reportviewer and spark lines and seeing very slow performance.

What are your views on locking. Eg;

https://github.com/welegan/RedisSessionProvider

Title really says it all. I get serialization errors from a multi-application shared session state environment where not all session key value types exist in every application. A and B types are in both apps, but C is only in the A app. This works fine in other providers I've used because they rely on the built in deserialization behavior of SessionStateItemCollection.

The problem seems to be related to StackExchangeClientConnection.GetSessionData

The loop there invokes redisUtility.GetObjectFromBytes on every item which is a pass-through to serialization.

If you refer to the Microsoft.ApplicationServer.Caching.DataCacheSessionStoreProvider you can see how they handle this serialization so that the application doesn't fall down. Upfront they store the byte[] format of the remote collection, and each item from the store is the start/end position of that object in a stream.

The DataCacheSessionStoreProvider uses the SessionStateItemCollection.Deserialize() method and format for handling this. You can either do that, or you can change the impl of your stored ISessionStateItemCollection.

SessionStateItemCollection.Deserialize is special because it stored the serialized ranges of the session collection in serialized format inside a private field. Every time you access Session[key] it first checks to see if it's in the _serializedItems collection and is not deserialized, and deserializes it. If you don't call that method it won't fill in that collection which forces you to handle the serialization. This should at least be a flag of some sort.

Are there any plans to support the release of the ASP.Net Async SessionState provider?

i faced moved exception,what should i do...

Can you provide support for redis cluster?
In the last version using a cluster in the connectionstring throw the exception: "Multi-key operations must involve a single slot; keys can use 'hash tags' to help this, i.e. '{/users/12345}/account' and '{/users/12345}/contacts' will always be in the same slot".
The solution is very simple...i think that only changing the format of the key solve the issue.

Hi,

We are planning to use Redis with Sentinal Setup. Does RedisSessionState Provider supports Sentinel. How do i need to configure my web.config to use the sentinel feature of Redis.

Please help.

Thank you

The current serialization of data to/from redis is based on BinaryFormatter. However, having a custom/extensible mechanism allowing the user to provide/register it's own serializer would be a great addition to this component.

Would you guys be willing to accept some form of pull-request implementing this feature?

Regards

Calling RedisOutputCacheConnectionWrapper.Add with expire datetime
generates two commands
Set key value
pexpire key datetime_in_seconds (a very big number "251932173768370")

Calling RedisOutputCacheConnectionWrapper.Set
generates one command
psetex key time_span_milliseconds value - and the timespan is ok

RedisOutputCacheConnectionWrapper line 57 ->
object[] valueArgs = new object[] { RedisUtility.GetBytesFromObject(entry), expiryTime.TotalMilliseconds };

why does the timespan use the totalmilliseconds methos ?

as oppose to StackExchangeClientConnection line 253
TimeSpan timeSpanForExpiry = utcExpiry - DateTime.UtcNow;

NullReferenceException in Mono web-application (nginx + fast-cgi, Ubuntu 15.04, mono 4.0.3) for concurrent web-requests.

Log:
[2015-08-26 12:49:04.893][Error]GetItemFromSessionStore => System.NullReferenceException: Object reference not set to an instance of an object
at Microsoft.Web.Redis.KeyGenerator.RegenerateKeyStringIfIdModified (System.String id, System.String applicationName) [0x00000] in :0
at Microsoft.Web.Redis.RedisSessionStateProvider.GetAccessToStore (System.String id) [0x00000] in :0
at Microsoft.Web.Redis.RedisSessionStateProvider.GetItemFromSessionStore (Boolean isWriteLockRequired, System.Web.HttpContext context, System.String id, System.Boolean& locked, System.TimeSpan& lockAge, System.Object& lockId, System.Web.SessionState.SessionStateActions& actions) [0x00000] in :0

Web.config session section:

<sessionState mode="Custom" customProvider="RedisSessionStateProvider">
      <providers>
        <add name="RedisSessionStateProvider" type="Microsoft.Web.Redis.RedisSessionStateProvider" host="127.0.0.1" accessKey="" ssl="false" />
      </providers>
    </sessionState>

Thanks.