Add a retry mechanism when Python runtime exceptions occur and use it within RegionPropsComputation

Introduce `runScriptWithRetries()` method to handle `PythonRuntimeException` with a retry logic, improving the robustness of the computation workflow.

Author: Stefan Hahmann

src/main/java/org/mastodon/mamut/linking/trackastra/appose/computation/RegionPropsComputation.java

@@ -131,7 +131,7 @@ private SingleTimepointRegionProps computeSingleTimepointProps( final Source< ?
 			inputs.put( IMAGE, imageNDArray );
 			inputs.put( MASK, masksNDArray );
 
-			Service.Task result = runScript();
+			Service.Task result = runScriptWithRetries( 1, 10 );
 			ShmImg< IntType > labels = new ShmImg<>( ( NDArray ) result.outputs.get( LABELS ) );
 			ShmImg< IntType > timepoints = new ShmImg<>( ( NDArray ) result.outputs.get( TIMEPOINTS ) );
 			LoopBuilder.setImages( timepoints ).multiThreaded().forEachPixel( p -> p.set( timepoint ) ); // all timepoints are the same

src/main/java/org/mastodon/mamut/util/appose/ApposeProcess.java

@@ -185,6 +185,27 @@ protected Service.Task runScript() throws IOException
 		return currentTask;
 	}
 
+	protected Service.Task runScriptWithRetries( final int attempt, final int maxRetries ) throws IOException
+	{
+		try
+		{
+			return runScript();
+		}
+		catch ( PythonRuntimeException e )
+		{
+			if ( attempt <= maxRetries )
+			{
+				logger.warn( "Python runtime exception on attempt {}/{}. Retrying...", attempt, maxRetries );
+				return runScriptWithRetries( attempt + 1, maxRetries );
+			}
+			else
+			{
+				logger.error( "Python runtime exception on final attempt {}/{}. No more retries.", attempt, maxRetries );
+				throw e;
+			}
+		}
+	}
+
 	public void cancel()
 	{
 		pythonWorker.kill();