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Asked: 2026-05-11T01:09:54+00:00

I’m running an SQL query against a mainframe DB2 database using the OdbcDataReader class

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I’m running an SQL query against a mainframe DB2 database using the OdbcDataReader class and ExecuteReader() method. This code is in production and has been running fine for months.

The query normally takes 1-2 minutes to execute. This past Friday, the query encountered a ThreadAbortException. Below is the formatted stack trace. The ApplicationException in the trace is created in my catch block.

In case it is important, the query is run when a client calls a web service method. The web service is hosted in a Windows Service. The web service is hosted in a Windows Service using the soap.tcp protocol.

Any ideas why the TreadAbortException is happening?

Stack trace for 2 exception(s). Root cause at the top.

Exception 2: Thread was being aborted.
System.Threading.ThreadAbortException inside C:\WINDOWS\assembly\GAC_64\System.Data\2.0.0.0__b77a5c561934e089\System.Data.dll at System.Data.Common.UnsafeNativeMethods.SQLExecDirectW(OdbcStatementHandle StatementHandle, String StatementText, Int32 TextLength) at System.Data.Odbc.OdbcStatementHandle.ExecuteDirect(String commandText) at System.Data.Odbc.OdbcCommand.ExecuteReaderObject(CommandBehavior behavior, String method, Boolean needReader, Object[] methodArguments, SQL_API odbcApiMethod) at System.Data.Odbc.OdbcCommand.ExecuteReaderObject(CommandBehavior behavior, String method, Boolean needReader) at System.Data.Odbc.OdbcCommand.ExecuteReader(CommandBehavior behavior) at MyCompany.MyDatabase.GetFolioList(String sqlWhereClause)

Exception 1: Unable to retrieve the folio summary list where STAT_CD=’V’.
System.ApplicationException inside D:\Production\DBGateway\bin\MyDatabase.dll at MyCompany.MyDatabase.GetFolioList(String sqlWhereClause) at MyCompany.MyDatabase.<>c__DisplayClass18.b__17() at MyCompany.WebUtilities.WebServiceBase.WebMethodTemplate[T](String methodName, String exceptionFormat, WebMethodWorker1 Worker, StringFormatter1 FormatterMethod)

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1 Answer

  1. Here is the answer to my own question.

    When hosting a web service, there is some process monitoring how long a web service call is taking. If a call is taking too long, then it is killed and a ThreadAbortException will occur. The timeout can be increased.

    For a WSE3 web service running outside of ASP.NET, e.g. hosted as soap.tcp (like mine), the configuration property is executionTimeoutInSeconds:

    <configuration>   <microsoft.web.services3>     <messaging>       <executionTimeoutInSeconds value='360' />     </messaging>   </microsoft.web.services3> </configuration>

    For a web service hosted in ASP.NET, the configuration property is executionTimeout:

    <configuration> <system.web>             <httpRuntime executionTimeout=”360” />       </system.web> </configuration
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