diff --git a/datastore_server/source/java/ch/ethz/sis/openbis/generic/server/dss/plugins/sync/harvester/synchronizer/EntitySynchronizer.java b/datastore_server/source/java/ch/ethz/sis/openbis/generic/server/dss/plugins/sync/harvester/synchronizer/EntitySynchronizer.java
index 9e8d3e6725c93828e11cb5ecd087cdb58a46007e..67cc8d4a33e9b78fb576ee1711ed54239fa305f3 100644
--- a/datastore_server/source/java/ch/ethz/sis/openbis/generic/server/dss/plugins/sync/harvester/synchronizer/EntitySynchronizer.java
+++ b/datastore_server/source/java/ch/ethz/sis/openbis/generic/server/dss/plugins/sync/harvester/synchronizer/EntitySynchronizer.java
@@ -517,7 +517,6 @@ public class EntitySynchronizer
         ParallelizedExecutionPreferences preferences = config.getParallelizedExecutionPrefs();
         String asUrl = config.getDataSourceOpenbisURL();
         String dssUrl = config.getDataSourceDSSURL();
-        monitor.log("AS URL: " + asUrl + ", DSS URL: " + dssUrl);
         V3Utils v3Utils = V3Utils.create(asUrl, dssUrl);
         monitor.log("Services for accessing data source established");
         ParallelizedExecutor.process(attachmentHoldersToProcess, new AttachmentSynchronizationTaskExecutor(synchronizationSummary,
diff --git a/datastore_server/source/java/ch/ethz/sis/openbis/generic/server/dss/plugins/sync/harvester/synchronizer/parallelizedExecutor/AttachmentSynchronizationTaskExecutor.java b/datastore_server/source/java/ch/ethz/sis/openbis/generic/server/dss/plugins/sync/harvester/synchronizer/parallelizedExecutor/AttachmentSynchronizationTaskExecutor.java
index 1a521dd72e786dd8fcd7349b24e979fd00c14bc4..55cdf7128520f3e1516872f2e00b74d5e2b1555e 100644
--- a/datastore_server/source/java/ch/ethz/sis/openbis/generic/server/dss/plugins/sync/harvester/synchronizer/parallelizedExecutor/AttachmentSynchronizationTaskExecutor.java
+++ b/datastore_server/source/java/ch/ethz/sis/openbis/generic/server/dss/plugins/sync/harvester/synchronizer/parallelizedExecutor/AttachmentSynchronizationTaskExecutor.java
@@ -97,7 +97,6 @@ public final class AttachmentSynchronizationTaskExecutor implements ITaskExecuto
             TechId techId = null;
             ICommonServer commonServer = ServiceFinderUtils.getCommonServer(ServiceProvider.getConfigProvider().getOpenBisServerUrl());
             String localSessionToken = ServiceFinderUtils.login(commonServer, config.getHarvesterUser(), config.getHarvesterPass());
-            monitor.log("Logged in: " + localSessionToken);
             IAttachmentsOperationsHandler attachmentsOperationsHandler = null;
             if (item.getEntityKind() == SyncEntityKind.EXPERIMENT)
             {
diff --git a/datastore_server/source/java/ch/ethz/sis/openbis/generic/server/dss/plugins/sync/harvester/synchronizer/parallelizedExecutor/DataSetRegistrationIngestionService.java b/datastore_server/source/java/ch/ethz/sis/openbis/generic/server/dss/plugins/sync/harvester/synchronizer/parallelizedExecutor/DataSetRegistrationIngestionService.java
index 4054d1e7f7a144f9cfd149169fc1400b0e4d3e6a..40ad671c47f0aa7a2f5f6cd24bfdb77274f4c2d8 100644
--- a/datastore_server/source/java/ch/ethz/sis/openbis/generic/server/dss/plugins/sync/harvester/synchronizer/parallelizedExecutor/DataSetRegistrationIngestionService.java
+++ b/datastore_server/source/java/ch/ethz/sis/openbis/generic/server/dss/plugins/sync/harvester/synchronizer/parallelizedExecutor/DataSetRegistrationIngestionService.java
@@ -42,6 +42,8 @@ import ch.ethz.sis.openbis.generic.dssapi.v3.dto.datasetfile.id.IDataSetFileId;
 import ch.ethz.sis.openbis.generic.server.dss.plugins.sync.harvester.synchronizer.util.DSPropertyUtils;
 import ch.ethz.sis.openbis.generic.server.dss.plugins.sync.harvester.synchronizer.util.V3Utils;
 import ch.systemsx.cisd.common.io.IOUtilities;
+import ch.systemsx.cisd.common.logging.LogCategory;
+import ch.systemsx.cisd.common.logging.LogFactory;
 import ch.systemsx.cisd.etlserver.registrator.api.v2.IDataSet;
 import ch.systemsx.cisd.etlserver.registrator.api.v2.IDataSetRegistrationTransactionV2;
 import ch.systemsx.cisd.etlserver.registrator.api.v2.IDataSetUpdatable;
@@ -59,6 +61,9 @@ import ch.systemsx.cisd.openbis.generic.shared.util.SimpleTableModelBuilder;
 class DataSetRegistrationIngestionService extends IngestionService<DataSetInformation>
 {
     private static final long serialVersionUID = 1L;
+    
+    private static final Logger operationLog =
+            LogFactory.getLogger(LogCategory.OPERATION, DataSetRegistrationIngestionService.class);
  
     private final NewExternalData dataSet;
 
@@ -158,6 +163,13 @@ class DataSetRegistrationIngestionService extends IngestionService<DataSetInform
         }
     }
 
+    @Override
+    protected TableModel errorTableModel(Map<String, Object> parameters, Throwable e)
+    {
+        operationLog.error("Error occurred while registering data set " + dataSet.getCode(), e);
+        return super.errorTableModel(parameters, e);
+    }
+
     private TableModel summaryTableModel(Map<String, Object> parameters, String summary)
     {
         SimpleTableModelBuilder builder = new SimpleTableModelBuilder(true);
@@ -230,10 +242,6 @@ class DataSetRegistrationIngestionService extends IngestionService<DataSetInform
             {
                 DataSetFilePermId filePermId = orgFile.getPermId();
                 FileDetails fileDetails = fileDetailsMap.get(filePermId);
-
-                // System.out.println("Downloaded " + orgFile.getPath() + " "
-                // + MemorySizeFormatter.format(orgFile.getFileLength()));
-
                 Path path = Paths.get(dir.getAbsolutePath(), filePath);
                 InputStream inputStream = fileDownload.getInputStream();
                 OutputStream outputStream = Files.newOutputStream(path);
diff --git a/datastore_server/source/java/ch/ethz/sis/openbis/generic/server/dss/plugins/sync/harvester/synchronizer/parallelizedExecutor/DataSetRegistrationTaskExecutor.java b/datastore_server/source/java/ch/ethz/sis/openbis/generic/server/dss/plugins/sync/harvester/synchronizer/parallelizedExecutor/DataSetRegistrationTaskExecutor.java
index 7b610a96363b279602c3565312596068e33beaf2..7aa6f51faf02e68475435b965cb7482c529abff3 100644
--- a/datastore_server/source/java/ch/ethz/sis/openbis/generic/server/dss/plugins/sync/harvester/synchronizer/parallelizedExecutor/DataSetRegistrationTaskExecutor.java
+++ b/datastore_server/source/java/ch/ethz/sis/openbis/generic/server/dss/plugins/sync/harvester/synchronizer/parallelizedExecutor/DataSetRegistrationTaskExecutor.java
@@ -18,7 +18,6 @@ package ch.ethz.sis.openbis.generic.server.dss.plugins.sync.harvester.synchroniz
 
 import java.io.File;
 import java.util.HashMap;
-import java.util.List;
 import java.util.Properties;
 
 import org.apache.log4j.Logger;
@@ -74,7 +73,9 @@ public final class DataSetRegistrationTaskExecutor implements ITaskExecutor<Inco
                 {
                     String message = resultTable.getRows().get(0).getValues().toString();
                     dsRegistrationSummary.notRegisteredDataSetCodes.add(dataSet.getDataSet().getCode());
-                    operationLog.error(message);
+                    operationLog.error("Registration for data set " + dataSet.getDataSet().getCode() + " failed: "
+                            + message + ", exp: " + dataSet.getDataSet().getExperimentIdentifierOrNull()
+                            + ", sample:" + dataSet.getDataSet().getSampleIdentifierOrNull());
                     return Status.createError(message);
                 }
                 else if (header.getTitle().startsWith("Added"))
diff --git a/datastore_server/source/java/ch/ethz/sis/openbis/generic/server/dss/plugins/sync/harvester/synchronizer/util/V3Utils.java b/datastore_server/source/java/ch/ethz/sis/openbis/generic/server/dss/plugins/sync/harvester/synchronizer/util/V3Utils.java
index 5b6c61789630ed9023498fdab73d537e835213a5..3c5529972ebf9e40b38b159cc73785fc9ae2f938 100644
--- a/datastore_server/source/java/ch/ethz/sis/openbis/generic/server/dss/plugins/sync/harvester/synchronizer/util/V3Utils.java
+++ b/datastore_server/source/java/ch/ethz/sis/openbis/generic/server/dss/plugins/sync/harvester/synchronizer/util/V3Utils.java
@@ -41,8 +41,6 @@ import ch.ethz.sis.openbis.generic.dssapi.v3.dto.datasetfile.download.DataSetFil
 import ch.ethz.sis.openbis.generic.dssapi.v3.dto.datasetfile.fetchoptions.DataSetFileFetchOptions;
 import ch.ethz.sis.openbis.generic.dssapi.v3.dto.datasetfile.id.IDataSetFileId;
 import ch.ethz.sis.openbis.generic.dssapi.v3.dto.datasetfile.search.DataSetFileSearchCriteria;
-import ch.systemsx.cisd.common.spring.HttpInvokerUtils;
-import ch.systemsx.cisd.common.ssl.SslCertificateHelper;
 import ch.systemsx.cisd.openbis.dss.generic.server.EncapsulatedOpenBISService;
 
 /**
@@ -52,7 +50,7 @@ import ch.systemsx.cisd.openbis.dss.generic.server.EncapsulatedOpenBISService;
  */
 public class V3Utils
 {
-    public static final int TIMEOUT = 100000;
+    public static final long TIMEOUT = 6 * DateUtils.MILLIS_PER_HOUR;
 
     private final IDataStoreServerApi dss;
     private final IApplicationServerApi as;
@@ -62,7 +60,7 @@ public class V3Utils
         return new V3Utils(asUrl, dssUrl, TIMEOUT);
     }
 
-    private V3Utils (String asUrl, String dssUrl, int timeout)
+    private V3Utils (String asUrl, String dssUrl, long timeout)
     {
         String timeoutInMinutes = Long.toString(timeout / DateUtils.MILLIS_PER_MINUTE);
         this.as = EncapsulatedOpenBISService.createOpenBisV3Service(asUrl, timeoutInMinutes);