do not stop when fails to destroy asset namespace.

pom.xml

@@ -5,7 +5,7 @@
 
 	<groupId>au.edu.unimelb.mf</groupId>
 	<artifactId>unimelb-mf-clients</artifactId>
-	<version>0.6.6</version>
+	<version>0.6.7</version>
 	<packaging>jar</packaging>
 	<name>unimelb-mf-clients</name>
 	<url>https://gitlab.unimelb.edu.au/resplat-mediaflux/unimelb-mf-clients</url>

src/main/java/unimelb/mf/client/sync/task/SyncDeleteAssetsTask.java

@@ -146,9 +146,13 @@ public class SyncDeleteAssetsTask extends AbstractMFTask {
 				return;
 			}
 		}
-		AssetNamespaceUtils.destroyAssetNamespace(session(), ns);
-		if (_verbose) {
-			logger().info("Deleted empty asset namespace: '" + ns + "'");
+		try {
+			AssetNamespaceUtils.destroyAssetNamespace(session(), ns);
+			if (_verbose) {
+				logger().info("Deleted empty asset namespace: '" + ns + "'");
+			}
+		} catch (Throwable e) {
+			logger().warning("Failed to destory asset namespace: '" + ns + "'. " + "Error: " + e.getMessage());
 		}
 		String pns = PathUtils.getParentPath(ns);
 		processEmptyAssetNamespace(pns, true);