topic Re: Memory Leak on referencing IMap instance in ArcObjects SDK Questions

Memory Leak on referencing IMap instance

mannokmannok — Fri, 26 Mar 2021 03:08:27 GMT

var pMd = new MapDocumentClass();
pMd.Open(RevisionState.CurrentBackupMXDPath_.BSValue());
var pMap = pMd.Map[0];
pMd.Close();
Marshal.FinalReleaseComObject(pMap);
pMap = null;
Marshal.FinalReleaseComObject(pMd);
pMd = null;
GC.Collect();
GC.WaitForPendingFinalizers();

Please see the code above. I found that memory usage increased so much while executing var pMap = pMd.Map[0];. However, I cannot release these memory even I run all the rest of the statement. May I know how can I release IMap reference? Thanks!

Re: Memory Leak on referencing IMap instance

KirkKuykendall1 — Fri, 26 Mar 2021 03:24:43 GMT

Maybe try calling Collect() and WaitforPendingFinalizers before closing, as described here:

https://community.esri.com/t5/arcobjects-sdk-questions/layers-from-sde-database-are-shown-as-invalid/m-p/1030459/highlight/true#M20253

Re: Memory Leak on referencing IMap instance

mannokmannok — Fri, 26 Mar 2021 03:32:12 GMT

Thank you @KirkKuykendall1

Have tried just now but no luck... Memory usage of this statement cost me 50000KB of memory. Even I run the rest statements in this order...

var pMd = new MapDocumentClass();
pMd.Open(RevisionState.CurrentBackupMXDPath_.BSValue());
var pMap = pMd.Map[0];
GC.Collect();
GC.WaitForPendingFinalizers();
pMd.Close();
Marshal.FinalReleaseComObject(pMap);
pMap = null;
Marshal.FinalReleaseComObject(pMd);
pMd = null;

The memory usage drops only ~1000KB 😞

Re: Memory Leak on referencing IMap instance

mannokmannok — Tue, 30 Mar 2021 14:57:27 GMT

Anyone help me out? 😞

Re: Memory Leak on referencing IMap instance

BrentHoskisson — Mon, 05 Apr 2021 15:08:19 GMT

At the very end of all of my projects in "Dispose" of my form with the map I always include

ESRI.ArcGIS.ADF.COMSupport.AOUninitialize.Shutdown();

This is in the ESRI.ArcGIS.ADF.Local resource.

I have never had an issue and I don't need to do the garbage collecting and marshalling.

Brent Hoskisson

Re: Memory Leak on referencing IMap instance

mannokmannok — Wed, 07 Apr 2021 07:59:14 GMT

This is because you are playing with a short-run process. For me, I am working with a long run process which lives as long as the lifetime of an ArcMap session.

Re: Memory Leak on referencing IMap instance

DuncanHornby — Fri, 14 May 2021 09:35:31 GMT

What is in the map? Do you have basemaps displaying, layers linking to say datasets stored in ArcGIS Online or ArcServer that maybe maintaining a link thus not allowing memory to be released? I would try a simple map with say a locally stored shapefile as a test. See if you can track the problem down.