ESRI.ArcGIS.Geoprocessor.Geoprocessor unable to release memory

Question

Below script is very standard for running any geoprocessing tool using ArcObjects but it hardly releases memory. It is helping the tool crashes after processing few 100 datasets. Please help in this regard. Thanks in advance.

geoprocessor.ClearMessages();
 // Set the overwrite output option to true
 geoprocessor.OverwriteOutput = true;
 try
 {
 Logger.Write("RunTool is started", "AppLog");

// Execute the tool 
 geoprocessor.Execute(process, null);
 ReturnMessages(geoprocessor);

ESRI.ArcGIS.ADF.ComReleaser.ReleaseCOMObject(geoprocessor);
 ESRI.ArcGIS.ADF.ComReleaser.ReleaseCOMObject(process);
 geoprocessor = null;
 process = null;

}
 catch (Exception ex)
 {
 Logger.Write("Exception in RunTool::"+ex.Message, "ExceptionHandling");
 ReturnMessages(geoprocessor);
 }

MilanasSkačkauskas1 · Answer

You need to check if it is COM object, if not - check if it is IDisposable. I have smart function for that:

public static int Release(object comObj)
 {
    try
    { 
       if (comObj != null)
       {
          if (Marshal.IsComObject(comObj))
          {
             try
             {
                return Marshal.ReleaseComObject(comObj);
             }
             catch
             {
                comObj = null;
             }
          }
          else
          {
             var disposable = comObj as IDisposable;
             if (disposable != null)
             {
                disposable.Dispose();
                return 0;
             }
          }
       }

}
   catch (Exception ex)
    {

System.Diagnostics.Debug.WriteLine("CATCH: " + ex.Message);
    }
    return -999;
 }

How to use function:

finally
 {
    if (geoprocessor != null)
    {
      Release(geoprocessor);
      geoprocessor= null;
    }

}

Veer_Photo1.jpg

umasuryasykam1 · Answer

Hi,

Although I'm not releasing within finally block, they are being released within the try block itself properly and those 2 lines of code always get executed. But memory is not being recovered after that.

Another question I have is normally we are releasing eari COM objects using Marshal.ReleaseComObject.

Is the Geoprocessor class not a COM object?

MilanasSkačkauskas1 · Answer

umasurya sykam First of all - your code missing "finally" block. You need to realease all COM objects int it. So if exception occurs in some situations - it always release COM objects and it's memory. For example:

Geoprocessor geoprocessor = null;

Process  process= null;

try

{

geoprocessor = new Geoprocessor();

process =  new Process();

geoprocessor.Execute(process, null);
ReturnMessages(geoprocessor);

}

catch()

{

Logger.Write("Exception in RunTool::"+ex.Message, "ExceptionHandling");
ReturnMessages(geoprocessor);

}

finaly

{

if(geoprocessor != null)

{

ESRI.ArcGIS.ADF.ComReleaser.ReleaseCOMObject(geoprocessor);

geoprocessor =null;

}

if(process != null)

{

ESRI.ArcGIS.ADF.ComReleaser.ReleaseCOMObject(process );

process =null;

}