Questions regarding to <maxconnection> configuration of BTSNTSVC.exe.config/BTSNTSVC64.exe.config


1. : The autoConfig attribute only takes effect for ASP.NET web applications not .Net client applications.

The BizTalk host instances – BTSNTSVC.exe/BTSNTSVC64.exe are typical .net client applications here when calling the remote Web/WCF services.

Specifies whether to automatically configure the following settings to achieve optimal performance based on the machine configuration:

The values are set according to the KB article at http://support.microsoft.com/?id=821268.

This attribute does not affect the .NET Framework client applications; only ASP.NET applications.

 

2. <remove> element will only remove a pre-configured item. If the specified item cannot be found in all loaded config files, an internal exception will be thrown.

See the corresponding code and remarks on MSDN.

 // System.Configuration.ConfigurationElementCollection
private void BaseRemove(object key, bool throwIfMissing)

 

 

                if (throwIfMissing)
                {
                    throw new ConfigurationErrorsException(SR.GetString(“Config_base_collection_entry_not_found”, new object[]
                    {
                        key
                    }));
                }
                return;

 

MSDN:

 

The <remove> element removes the connection management list entry for the specified server that was defined earlier in the configuration file or at a higher level in the configuration file hierarchy.

 

 

3. For using <clear/> element, the result should be the same as default setting.

 

<connectionManagement>     

      <clear/>

</connectionManagement>

 

 

4. What is connection management list?

 

It’s actually a collection of ConnectionManagementElement objects initialized in memory during process startup. I launched WinDbg to attach to my BTSNTSVC.exe process and tried to dump the values from the in-memory objects which is corresponding to my config file as below.

 

 

 

 

 

 

0:142> !dumpheap -type System.Net.Configuration.ConnectionManagementElementCollection

Loading the heap objects into our cache.

——————————

Heap 0

Address       MT     Size

021bade0 70be6770       96    1 System.Net.Configuration.ConnectionManagementElementCollection

021bade0 70be6770       96    

total 1 objects

——————————

 

0:142> !do 021bade0

Name:        System.Net.Configuration.ConnectionManagementElementCollection

Fields:

      MT    Field   Offset                 Type VT     Attr    Value Name

715d6788  4000006       30       System.Boolean  1 instance        0 _bDataToWrite

715d6788  4000007       31       System.Boolean  1 instance        0 _bModified

715d6788  4000008       32       System.Boolean  1 instance        0 _bReadOnly

715d6788  4000009       33       System.Boolean  1 instance        0 _bElementPresent

715d6788  400000a       34       System.Boolean  1 instance        1 _bInited

708867dc  400000b        4 …ionLockCollection  0 instance 00000000 _lockedAttributesList

708867dc  400000c        8 …ionLockCollection  0 instance 00000000 _lockedAllExceptAttributesList

708867dc  400000d        c …ionLockCollection  0 instance 021bb67c _lockedElementsList

708867dc  400000e       10 …ionLockCollection  0 instance 021bb6cc _lockedAllExceptElementsList

70888168  400000f       14 …nfigurationValues  0 instance 021bae58 _values

715cfb08  4000010       18        System.String  0 instance 00000000 _elementTagName

708889e4  4000011       1c …lementInformation  0 instance 00000000 _evaluationElement

70888128  4000012       20 …onElementProperty  0 instance 0e011798 _elementProperty

7090cac4  4000013       2c         System.Int32  1 instance        0 _fItemLocked

70886844  4000014       24 …ontextInformation  0 instance 00000000 _evalContext

7088746c  4000015       28 …nfigurationRecord  0 instance 0e010998 _configRecord

715d2ad4  40000af       50         System.Int32  1 instance        0 _removedItemCount

715d2ad4  40000b0       54         System.Int32  1 instance        0 _inheritedCount

715d43a8  40000b1       38 …ections.ArrayList  0 instance 021bae40 _items

715cfb08  40000b2       3c        System.String  0 instance 0e011b70 _addElement

715cfb08  40000b3       40        System.String  0 instance 0e001c70 _removeElement

715cfb08  40000b4       44        System.String  0 instance 0e001c8c _clearElement

715d6788  40000b5       35       System.Boolean  1 instance        0 bEmitClearTag

715d6788  40000b6       36       System.Boolean  1 instance        0 bCollectionCleared

715d6788  40000b7       37       System.Boolean  1 instance        0 bModified

715d6788  40000b8       58       System.Boolean  1 instance        1 bReadOnly

715c3a30  40000b9       48 …ections.IComparer  0 instance 00000000 _comparer

715d6788  40000ba       59       System.Boolean  1 instance        0 internalAddToEnd

715cfb08  40000bb       4c        System.String  0 instance 0dff0260 internalElementTagName

 

0:142> !do 021bae40

Name:        System.Collections.ArrayList

Fields:

      MT    Field   Offset                 Type VT     Attr    Value Name

71586d84  4000bda        4      System.Object[]  0 instance 021bb364 _items

715d2ad4  4000bdb        c         System.Int32  1 instance        2 _size

715d2ad4  4000bdc       10         System.Int32  1 instance        2 _version

715cf744  4000bdd        8        System.Object  0 instance 00000000 _syncRoot

71586d84  4000bde      258      System.Object[]  0   shared   static emptyArray

 

0:142> !psscor4.da -details 021bb364

Name:        System.Object[]

Array:       Rank 1, Number of elements 4, Type CLASS

Element Methodtable: 715cf744

[0] 021bb350

    Name:        System.Configuration.ConfigurationElementCollection+Entry

   

    Fields:

              MT    Field   Offset                 Type VT     Attr    Value Name

        7090d9cc  40003d2        c             System.Int32      1     instance            3     _entryType

        715cf744  40003d3        4            System.Object      0     instance     021bb248     _key

        70888070  40003d4        8     …figurationElement      0     instance     021baff4     _value

[1] 021bb668

    Name:        System.Configuration.ConfigurationElementCollection+Entry

   

    Fields:

              MT    Field   Offset                 Type VT     Attr    Value Name

        7090d9cc  40003d2        c             System.Int32      1     instance            3     _entryType

        715cf744  40003d3        4            System.Object      0     instance     021bb594     _key

        70888070  40003d4        8     …figurationElement      0     instance     021bb384     _value

[2] null

[3] null

 

0:142> !do 021baff4    

Name:        System.Net.Configuration.ConnectionManagementElement

 

Fields:

      MT    Field   Offset                 Type VT     Attr    Value Name

715d6788  4000006       30       System.Boolean  1 instance        0 _bDataToWrite

715d6788  4000007       31       System.Boolean  1 instance        0 _bModified

715d6788  4000008       32       System.Boolean  1 instance        1 _bReadOnly

715d6788  4000009       33       System.Boolean  1 instance        1 _bElementPresent

715d6788  400000a       34       System.Boolean  1 instance        1 _bInited

708867dc  400000b        4 …ionLockCollection  0 instance 00000000 _lockedAttributesList

708867dc  400000c        8 …ionLockCollection  0 instance 00000000 _lockedAllExceptAttributesList

708867dc  400000d        c …ionLockCollection  0 instance 00000000 _lockedElementsList

708867dc  400000e       10 …ionLockCollection  0 instance 00000000 _lockedAllExceptElementsList

70888168  400000f       14 …nfigurationValues  0 instance 021bb120 _values

715cfb08  4000010       18        System.String  0 instance 021baf9c _elementTagName

708889e4  4000011       1c …lementInformation  0 instance 00000000 _evaluationElement

70888128  4000012       20 …onElementProperty  0 instance 0e011798 _elementProperty

7090cac4  4000013       2c         System.Int32  1 instance        0 _fItemLocked

70886844  4000014       24 …ontextInformation  0 instance 00000000 _evalContext

7088746c  4000015       28 …nfigurationRecord  0 instance 0e010998 _configRecord

00000000  4002a00       38                       0 instance 021bb080 properties

00000000  4002a01       3c                       0 instance 021bb0a4 address

00000000  4002a02       40                       0 instance 021bb0e8 maxconnection

 

 

0:142> !do 021bb120

Name:        System.Configuration.ConfigurationValues

 

Fields:

      MT    Field   Offset                 Type VT     Attr    Value Name

715d6788  4000c0c       24       System.Boolean  1 instance        0 _readOnly

715d43a8  4000c0d        4 …ections.ArrayList  0 instance 021bb150 _entriesArray

715c3a64  4000c0e        8 …IEqualityComparer  0 instance 01ff78d0 _keyComparer

715d54d8  4000c0f        c …ections.Hashtable  0 instance 021bb168 _entriesTable

70bd4f40  4000c10       10 …e+NameObjectEntry  0 instance 00000000 _nullKeyEntry

70bea6c0  4000c11       14 …se+KeysCollection  0 instance 00000000 _keys

715cb8f0  4000c12       18 …SerializationInfo  0 instance 00000000 _serializationInfo

715d2ad4  4000c13       20         System.Int32  1 instance        5 _version

715cf744  4000c14       1c        System.Object  0 instance 00000000 _syncRoot

715c7314  4000c15      538 …em.StringComparer  0   shared   static defaultComparer

7088746c  4000126       28 …nfigurationRecord  0 instance 0e010998 _configRecord

715d6788  4000127       25       System.Boolean  1 instance        0 _containsElement

715d6788  4000128       26       System.Boolean  1 instance        0 _containsInvalidValue

715d4020  4000129       50 …tions.IEnumerable  0   shared   static s_emptyCollection

 

0:142> !do 021bb150

Name:        System.Collections.ArrayList

Fields:

      MT    Field   Offset                 Type VT     Attr    Value Name

71586d84  4000bda        4      System.Object[]  0 instance 021bb1f4 _items

715d2ad4  4000bdb        c         System.Int32  1 instance        4 _size

715d2ad4  4000bdc       10         System.Int32  1 instance        4 _version

715cf744  4000bdd        8        System.Object  0 instance 00000000 _syncRoot

 

0:142> !psscor4.da -details 021bb1f4

Name:        System.Object[]

Array:       Rank 1, Number of elements 4, Type CLASS

Element Methodtable: 715cf744

 

[0] 021bb1e4

    Name:        System.Collections.Specialized.NameObjectCollectionBase+NameObjectEntry

 

    Fields:

              MT    Field   Offset                 Type VT     Attr    Value Name

        715cfb08  4000c16        4            System.String      0     instance     021baf9c     Key

        715cf744  4000c17        8            System.Object      0     instance     021bb1d0     Value

 

[1] 021bb228

    Name:        System.Collections.Specialized.NameObjectCollectionBase+NameObjectEntry

 

    Fields:

              MT    Field   Offset                 Type VT     Attr    Value Name

        715cfb08  4000c16        4            System.String      0     instance     0dff0260     Key

        715cf744  4000c17        8            System.Object      0     instance     021bb214     Value

[2] 021bb288

    Name:        System.Collections.Specialized.NameObjectCollectionBase+NameObjectEntry

 

    Fields:

              MT    Field   Offset                 Type VT     Attr    Value Name

        715cfb08  4000c16        4            System.String      0     instance     021bafb0     Key

        715cf744  4000c17        8            System.Object      0     instance     021bb274     Value

[3] 021bb328

    Name:        System.Collections.Specialized.NameObjectCollectionBase+NameObjectEntry

 

    Fields:

              MT    Field   Offset                 Type VT     Attr    Value Name

        715cfb08  4000c16        4            System.String      0     instance     021bafcc     Key

        715cf744  4000c17        8            System.Object      0     instance     021bb314     Value

 

0:142> !do 021bb274    

Name:        System.Configuration.ConfigurationValue

 

Fields:

      MT    Field   Offset                 Type VT     Attr    Value Name

7090cac4  40003da        c         System.Int32  1 instance        2 ValueFlags

715cf744  40003db        4        System.Object  0 instance 021bb248 Value

708867a4  40003dc        8 …ropertySourceInfo  0 instance 021bb238 SourceInfo

 

0:142> !do 021bafb0    

Name:        System.String

String:      address

 

0:142> !do 021bb248

Name:        System.String

String:      www.contoso.com

 

0:142> !do 021bb314    

Name:        System.Configuration.ConfigurationValue

 

Fields:

      MT    Field   Offset                 Type VT     Attr    Value Name

7090cac4  40003da        c         System.Int32  1 instance        2 ValueFlags

715cf744  40003db        4        System.Object  0 instance 021bb308 Value

708867a4  40003dc        8 …ropertySourceInfo  0 instance 021bb2f8 SourceInfo

 

0:142> !do 021bafcc    

Name:        System.String

String:      maxconnection

 

0:142> !do 021bb308

Name:        System.Int32

Fields:

      MT    Field   Offset                 Type VT     Attr    Value Name

715d2ad4  40004a5        4         System.Int32  1 instance       24 m_value

 

Best regards,

WenJun Zhang


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