Kill orphan Blender process after rendering

src/main/java/com/sheepit/client/RenderProcess.java

@@ -19,6 +19,7 @@
 
 package com.sheepit.client;
 
+import com.sheepit.client.os.OS;
 import lombok.Data;
 
 import java.util.Date;
@@ -92,7 +93,19 @@ import oshi.software.os.OSProcess;
 		return 0;
 	}
 	
+	public void kill() {
+		if (process != null){
+			try {
+				OS.getOS().kill(process);
+				log.debug("RenderProcess::Process killed");
+			} catch (NullPointerException ex) { // We are racing the system itself, we can't avoid catching NPE's
+				log.debug("RenderProcess::Handled process becoming unavailable before getting killed");
+			}
+		}
+	}
+	
 	public void finish() {
+		kill();
 		endTime = new Date().getTime();
 		osProcess = null;
 		process = null;