add debug log line

src/main/java/org/gcube/datatransfer/resolver/services/StorageIDResolver.java

@@ -340,11 +340,12 @@ public class StorageIDResolver {
 	 * @return the storage client instance
 	 */
 	protected static IClient getStorageClientInstance(MemoryType memory) {
-		if ((!Objects.isNull(storageManagerClient)) && (storageManagerClient.getGcubeMemoryType().equals(memory)))
+		if ((!Objects.isNull(storageManagerClient)) && (storageManagerClient.getGcubeMemoryType().equals(memory))) {
+			LOG.debug("reusing the same storage-client object");
 			return storageManagerClient;
-		else {
+		}else {
 			if(!Objects.isNull(storageManagerClient)) {
-				LOG.debug("going to close an old storage-client instance");
+				LOG.debug("going to close an old storage-client instance on "+storageManagerClient.getGcubeMemoryType());
 				try {
 					storageManagerClient.forceClose();
 					LOG.debug("storage-client closed");
@@ -352,7 +353,7 @@ public class StorageIDResolver {
 					LOG.warn("Some problem occurred during the close operation:"+e.getMessage()+" Going to open another connection");
 				}
 			}
-			LOG.debug("initializing a new storage-client instance");
+			LOG.debug("initializing a new storage-client instance on "+memory);
 			storageManagerClient=new StorageClient(StorageIDResolver.class.getName(), StorageIDResolver.class.getSimpleName(), STORAGEID_RESOLVER, STORAGE_ACCESS_TYPE, memory, STORAGE_BACKEND_TYPE).getClient();
 			return storageManagerClient;
 		}