Yeah, that sounds like it could be the culprit. I'd have to dig into the
code more to know for sure.
I propose that while we're looking into the problem we also investigate the
feasibility of migrating the custom collections to use .NET 2.0 generics.
Just a thought -- any objections?
-Matt
On 3/2/07, Jonathan Mitchem <[EMAIL PROTECTED]> wrote:
My first impressions are that there is a multi-threading bug in the "in
memory" storage implementation within the Manager, such that we are
simultaneously attempting to modifying a collection while iterating through
it.
I will take a look at this further, and I expect the change will be in a
later release of Alchemi.
Jonathan
On 3/2/07, vronk < [EMAIL PROTECTED]> wrote:
>
> Hi Alchemi Developers,
>
> we use alchemi grid application since 1 year.
> Sometimes we have a problem with executors.
>
> We use Alchemi 1.0.5 with in memory database.
> If the manager and 2 executors runs about
> 2 days we notice an exception in the executor.
> This exception concerns a GThread.
> The GThread crashes and calculate not to the end.
>
> This execption seems to occur randomly.
>
> In the executor i can found the following exception
> message:
>
> ...
>
> 2007-03-02 18:51:20,656 [ExecuteThreadInAppDomain-thread] WARN - grid
> thread #
> 7e0ba4ec-51e3-4a0f-ac74-99492e9d732f.1 failed (
> System.InvalidOperationException)
>
> System.InvalidOperationException: Collection was modified; enumeration
> operation may not execute.
>
> Server stack trace:
> at System.Collections.ArrayList.ArrayListEnumeratorSimple.MoveNext()
> at Alchemi.Manager.Storage.InMemoryManagerStorage.GetThread(String
> applicationId, Int32 threadId)
> at Alchemi.Manager.MThread.set_State(ThreadState value)
> at Alchemi.Manager.GManager.Executor_SetFinishedThread(SecurityCredentials
> sc, ThreadIdentifier ti,
> Byte[] thread, Exception e)
> at
>
System.Runtime.Remoting.Messaging.StackBuilderSink._PrivateProcessMessage(IntPtr
> md, Object[] args,
> Object server, Int32 methodPtr, Boolean fExecuteInContext, Object[]&
> outArgs)
> at
>
System.Runtime.Remoting.Messaging.StackBuilderSink.PrivateProcessMessage(RuntimeMethodHandle
> md,
> Object[] args, Object server, Int32 methodPtr, Boolean
> fExecuteInContext, Object[]& outArgs)
> at
> System.Runtime.Remoting.Messaging.StackBuilderSink.SyncProcessMessage(IMessage
> msg, Int32 methodPtr,
> Boolean fExecuteInContext)
>
> Exception rethrown at [0]:
> at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage
reqMsg, IMessage retMsg)
> at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData&
> msgData, Int32 type)
> at Alchemi.Core.IManager.Executor_SetFinishedThread(SecurityCredentials
> sc, ThreadIdentifier ti, Byte[]
> thread, Exception e)
> at Alchemi.Executor.GExecutor.ExecuteThreadInAppDomain()
> 2007-03-02 18:51:20,687 [ExecuteThreadInAppDomain-thread] INFO - Exited
> ExecuteThreadInAppDomain...
>
> 2007-03-02 18:51:20,687 [ExecuteThreadInAppDomain-thread] INFO -
> Started ExecuteThreadInAppDomain...
>
> ...
>
> I have no clue wy this problem occurs.
> Please take a look on this problem.
>
> Thanks in advance!
>
> Frank Piorko
>
>
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