diff --git a/dhp-workflows/dhp-usage-stats-update/src/main/java/eu/dnetlib/oa/graph/usagestats/export/PiwikDownloadLogs.java b/dhp-workflows/dhp-usage-stats-update/src/main/java/eu/dnetlib/oa/graph/usagestats/export/PiwikDownloadLogs.java
index cd531f868..9e423abd3 100644
--- a/dhp-workflows/dhp-usage-stats-update/src/main/java/eu/dnetlib/oa/graph/usagestats/export/PiwikDownloadLogs.java
+++ b/dhp-workflows/dhp-usage-stats-update/src/main/java/eu/dnetlib/oa/graph/usagestats/export/PiwikDownloadLogs.java
@@ -64,27 +64,22 @@ public class PiwikDownloadLogs {
 
 	private String getJson(String url) throws Exception {
 		try {
-			logger.info("Connecting to download the JSON: " + url);
+			logger.debug("Connecting to download the JSON: " + url);
 			URL website = new URL(url);
 			URLConnection connection = website.openConnection();
 
-			// connection.setRequestProperty ("Authorization", "Basic "+encoded);
 			StringBuilder response;
 			try (BufferedReader in = new BufferedReader(new InputStreamReader(connection.getInputStream()))) {
 				response = new StringBuilder();
 				String inputLine;
 				while ((inputLine = in.readLine()) != null) {
 					response.append(inputLine);
-//					response.append("\n");
 				}
 			}
-
-//			System.out.println("response ====> " + response.toString());
-
 			return response.toString();
 		} catch (Exception e) {
-			logger.error("Failed to get URL: " + e);
-			throw new Exception("Failed to get URL: " + e.toString(), e);
+			logger.error("Failed to get URL: " + url + " Exception: " + e);
+			throw new Exception("Failed to get URL: " + url + " Exception: " + e.toString(), e);
 		}
 	}
 
@@ -105,10 +100,11 @@ public class PiwikDownloadLogs {
 		}
 
 		public void run() {
+			SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
 			System.out
 				.println(
 					Thread.currentThread().getName() + " (Start) Thread for "
-						+ "parameters: currDay=" + currDay + ", siteId=" + siteId +
+						+ "parameters: currDay=" + sdf.format(currDay.getTime()) + ", siteId=" + siteId +
 						", repoLogsPath=" + repoLogsPath + ", portalLogPath=" + portalLogPath +
 						", portalLogPath=" + portalLogPath + ", portalMatomoID=" + portalMatomoID);
 			try {
@@ -121,7 +117,7 @@ public class PiwikDownloadLogs {
 			System.out
 				.println(
 					Thread.currentThread().getName() + " (End) Thread for "
-						+ "parameters: currDay=" + currDay + ", siteId=" + siteId +
+						+ "parameters: currDay=" + sdf.format(currDay.getTime()) + ", siteId=" + siteId +
 						", repoLogsPath=" + repoLogsPath + ", portalLogPath=" + portalLogPath +
 						", portalLogPath=" + portalLogPath + ", portalMatomoID=" + portalMatomoID);
 		}
@@ -151,9 +147,9 @@ public class PiwikDownloadLogs {
 			JSONParser parser = new JSONParser();
 			StringBuffer totalContent = new StringBuffer();
 			FileSystem fs = FileSystem.get(new Configuration());
-			FSDataOutputStream fin = fs
-				.create(new Path(outFolder + "/" + siteId + "_Piwiklog" + sdf.format((date)) + ".json"), true);
+
 			do {
+				int writtenBytes = 0;
 				String apiUrl = baseApiUrl;
 
 				if (i > 0) {
@@ -164,23 +160,31 @@ public class PiwikDownloadLogs {
 				if (content.length() == 0 || content.equals("[]"))
 					break;
 
+				FSDataOutputStream fin = fs
+					.create(
+						new Path(outFolder + "/" + siteId + "_Piwiklog" + sdf.format((date)) + "_offset_" + i
+							+ ".json"),
+						true);
 				JSONArray jsonArray = (JSONArray) parser.parse(content);
 				for (Object aJsonArray : jsonArray) {
 					JSONObject jsonObjectRaw = (JSONObject) aJsonArray;
-					fin.write(jsonObjectRaw.toJSONString().getBytes());
+					byte[] jsonObjectRawBytes = jsonObjectRaw.toJSONString().getBytes();
+					fin.write(jsonObjectRawBytes);
 					fin.writeChar('\n');
-//					totalContent.append(jsonObjectRaw.toJSONString());
-//					totalContent.append('\n');
+
+					writtenBytes += jsonObjectRawBytes.length + 1;
 				}
+
+				fin.close();
+				System.out
+					.println(
+						Thread.currentThread().getName() + " (Finished writing) Wrote " + writtenBytes
+							+ " bytes. Filename: " + siteId + "_Piwiklog" + sdf.format((date)) + "_offset_" + i
+							+ ".json");
+
 				i++;
 			} while (true);
 
-//			FileSystem fs = FileSystem.get(new Configuration());
-//			FSDataOutputStream fin = fs
-//				.create(new Path(outFolder + "/" + siteId + "_Piwiklog" + sdf.format((date)) + ".json"), true);
-//
-//			fin.write(totalContent.toString().getBytes());
-			fin.close();
 			fs.close();
 		}
 	}
@@ -221,7 +225,7 @@ public class PiwikDownloadLogs {
 		logger.info("Ending period for log download: " + sdf.format(end.getTime()));
 
 //		FileSystem fs = FileSystem.get(new Configuration());
-		ExecutorService executor = Executors.newFixedThreadPool(20);// creating a pool of 5 threadsσ
+		ExecutorService executor = Executors.newFixedThreadPool(10);// creating a pool of 5 threadsσ
 		for (int siteId : piwikIdToVisit) {
 
 			logger.info("Now working on piwikId: " + siteId);
@@ -242,7 +246,6 @@ public class PiwikDownloadLogs {
 			rs_date.close();
 
 			for (Calendar currDay = (Calendar) start.clone(); currDay.before(end); currDay.add(Calendar.DATE, 1)) {
-//				Runnable worker = new WorkerThread(currDay, siteId, repoLogsPath, portalLogPath, portalMatomoID, fs);
 				Runnable worker = new WorkerThread(currDay, siteId, repoLogsPath, portalLogPath, portalMatomoID);
 				executor.execute(worker);// calling execute method of ExecutorService
 			}
diff --git a/dhp-workflows/dhp-usage-stats-update/src/main/java/eu/dnetlib/oa/graph/usagestats/export/PiwikStatsDB.java b/dhp-workflows/dhp-usage-stats-update/src/main/java/eu/dnetlib/oa/graph/usagestats/export/PiwikStatsDB.java
index 63df64ac4..308881ee0 100644
--- a/dhp-workflows/dhp-usage-stats-update/src/main/java/eu/dnetlib/oa/graph/usagestats/export/PiwikStatsDB.java
+++ b/dhp-workflows/dhp-usage-stats-update/src/main/java/eu/dnetlib/oa/graph/usagestats/export/PiwikStatsDB.java
@@ -225,17 +225,6 @@ public class PiwikStatsDB {
 		}
 	}
 
-//    public void usageStats() throws Exception {
-//        try {
-//            viewsStats();
-//            downloadsStats();
-//            log.info("stat tables and views done");
-//        } catch (Exception e) {
-//            log.error("Failed to create usage usagestats: " + e);
-//            throw new Exception("Failed to create usage usagestats: " + e.toString(), e);
-//        }
-//    }
-
 	public void processRepositoryLog() throws Exception {
 
 		Statement stmt = ConnectDB.getHiveConnection().createStatement();
diff --git a/dhp-workflows/dhp-usage-stats-update/src/main/java/eu/dnetlib/oa/graph/usagestats/export/SarcStats.java b/dhp-workflows/dhp-usage-stats-update/src/main/java/eu/dnetlib/oa/graph/usagestats/export/SarcStats.java
index d094dd270..8c203b237 100644
--- a/dhp-workflows/dhp-usage-stats-update/src/main/java/eu/dnetlib/oa/graph/usagestats/export/SarcStats.java
+++ b/dhp-workflows/dhp-usage-stats-update/src/main/java/eu/dnetlib/oa/graph/usagestats/export/SarcStats.java
@@ -94,8 +94,6 @@ public class SarcStats {
 		stmt.executeUpdate("add jar /usr/share/cmf/common_jars/hive-hcatalog-core-1.1.0-cdh5.14.0.jar");
 		logger.info("Added JSON Serde jar");
 
-//		" + issn.replace("-", "_"
-
 		logger.info("Dropping sarc_sushilogtmp_json_array table");
 		String drop_sarc_sushilogtmp_json_array = "DROP TABLE IF EXISTS " +
 			ConnectDB.getUsageStatsDBSchema() + ".sarc_sushilogtmp_json_array";