MSSQL on Windows: AppDomain failed to unload with error code

Microsoft.SQLServer.Windows.EventRule.DBEngine.AppDomain_failed_to_unload_with_error_code_5_Rule (Rule)

The rule is triggered when an application domain fails to unload because of some error. The Windows application log may contain information about the original error code and other diagnostic details

Knowledge Base article:

Summary

The alert is triggered when an application domain fails to unload because of some error. The Windows application log may contain an information about the original error code and other diagnostic details.

Resolutions

Check the Windows application log for event ID 6219. This message may contain an information about the original error code. Try to restart the application. If the error persists or if you cannot restart the application, contact the vendor of the CLR application.

Overridable Parameters

Name

Description

Default Value

Enabled

Enables or disables the workflow.

Yes

Interval (seconds)

The recurring interval of time in seconds in which to run the workflow.

300

Priority

Defines Alert Priority.

1

Severity

Defines Alert Severity.

2

Synchronization Time

The synchronization time specified by using a 24-hour format. May be omitted.

 

Timeout (seconds)

Specifies the time the workflow is allowed to run before being closed and marked as failed.

200

Timeout for query execution (seconds)

The workflow will fail and register an event, if the query execution takes longer than the specified period.

60

Timeout for database connection (seconds)

The workflow will fail and register an event, if it cannot access the database during the specified period.

15

Element properties:

TargetMicrosoft.SQLServer.Windows.DBEngine
CategoryEventCollection
EnabledTrue
Alert GenerateTrue
Alert SeverityError
Alert PriorityNormal
RemotableTrue
Alert Message
MSSQL on Windows: AppDomain failed to unload with error code
{2}
CommentMom2017ID='{3F25DAEE-7616-4B2D-ACC6-8D1C30680AB4}';MOM2017GroupID={467ECC75-C5DA-42BD-955C-A73BBB51AF74}

Member Modules:

ID Module Type TypeId RunAs 
_F6DA1507_12AF_11D3_AB21_00A0C98620CE_ DataSource Microsoft.SQLServer.Windows.DataSource.EventCollectionFiltered Default
GenerateAlert WriteAction System.Health.GenerateAlert Default

Source Code:

<Rule ID="Microsoft.SQLServer.Windows.EventRule.DBEngine.AppDomain_failed_to_unload_with_error_code_5_Rule" Target="SqlDiscW!Microsoft.SQLServer.Windows.DBEngine" Enabled="true" ConfirmDelivery="true" Remotable="true" Comment="Mom2017ID='{3F25DAEE-7616-4B2D-ACC6-8D1C30680AB4}';MOM2017GroupID={467ECC75-C5DA-42BD-955C-A73BBB51AF74}">
<Category>EventCollection</Category>
<DataSources>
<DataSource ID="_F6DA1507_12AF_11D3_AB21_00A0C98620CE_" Comment="{F6DA1507-12AF-11D3-AB21-00A0C98620CE}" TypeID="Microsoft.SQLServer.Windows.DataSource.EventCollectionFiltered">
<MachineName>$Target/Property[Type="SqlCoreLib!Microsoft.SQLServer.Core.DBEngine"]/MachineName$</MachineName>
<NetbiosComputerName>$Target/Property[Type="SqlCoreLib!Microsoft.SQLServer.Core.DBEngine"]/NetbiosComputerName$</NetbiosComputerName>
<InstanceName>$Target/Property[Type="SqlCoreLib!Microsoft.SQLServer.Core.DBEngine"]/InstanceName$</InstanceName>
<ConnectionString>$Target/Property[Type="SqlCoreLib!Microsoft.SQLServer.Core.DBEngine"]/ConnectionString$</ConnectionString>
<InstanceVersion>$Target/Property[Type="SqlCoreLib!Microsoft.SQLServer.Core.DBEngine"]/Version$</InstanceVersion>
<InstanceEdition>$Target/Property[Type="SqlCoreLib!Microsoft.SQLServer.Core.DBEngine"]/Edition$</InstanceEdition>
<MonitoringType>$Target/Property[Type="SqlDiscW!Microsoft.SQLServer.Windows.DBEngine"]/MonitoringType$</MonitoringType>
<SqlExecTimeoutSeconds>60</SqlExecTimeoutSeconds>
<SqlTimeoutSeconds>15</SqlTimeoutSeconds>
<TimeoutSeconds>200</TimeoutSeconds>
<IntervalSeconds>300</IntervalSeconds>
<SyncTime/>
<EventDisplayNumber>6291</EventDisplayNumber>
</DataSource>
</DataSources>
<WriteActions>
<WriteAction ID="GenerateAlert" TypeID="Health!System.Health.GenerateAlert">
<Priority>1</Priority>
<Severity>2</Severity>
<AlertMessageId>$MPElement[Name="Microsoft.SQLServer.Windows.EventRule.DBEngine.AppDomain_failed_to_unload_with_error_code_5_Rule.AlertMessage"]$</AlertMessageId>
<AlertParameters>
<AlertParameter1>$Target/Property[Type="SqlCoreLib!Microsoft.SQLServer.Core.DBEngine"]/MachineName$</AlertParameter1>
<AlertParameter2>$Target/Property[Type="SqlCoreLib!Microsoft.SQLServer.Core.DBEngine"]/InstanceName$</AlertParameter2>
<AlertParameter3>Event ID: $Data/Property[@Name='EventID']$. $Data/Property[@Name='Message']$</AlertParameter3>
</AlertParameters>
<Suppression>
<SuppressionValue/>
</Suppression>
</WriteAction>
</WriteActions>
</Rule>