diff --git a/openbis/source/java/ch/ethz/sis/openbis/generic/server/asapi/v3/executor/entity/AbstractCreateEntityExecutor.java b/openbis/source/java/ch/ethz/sis/openbis/generic/server/asapi/v3/executor/entity/AbstractCreateEntityExecutor.java
index 9baa16217700eb6b2de6724a99d561a91e99ff46..66c719979eddf1d1cc75e17977e698bbd18721b2 100644
--- a/openbis/source/java/ch/ethz/sis/openbis/generic/server/asapi/v3/executor/entity/AbstractCreateEntityExecutor.java
+++ b/openbis/source/java/ch/ethz/sis/openbis/generic/server/asapi/v3/executor/entity/AbstractCreateEntityExecutor.java
@@ -56,6 +56,11 @@ public abstract class AbstractCreateEntityExecutor<CREATION extends ICreation, P
     @Override
     public List<PERM_ID> create(IOperationContext context, List<CREATION> creations)
     {
+        if (creations == null || creations.isEmpty())
+        {
+            return new ArrayList<PERM_ID>();
+        }
+
         try
         {
             List<PERM_ID> permIdsAll = new LinkedList<PERM_ID>();
diff --git a/openbis/source/java/ch/ethz/sis/openbis/generic/server/asapi/v3/executor/entity/AbstractUpdateEntityExecutor.java b/openbis/source/java/ch/ethz/sis/openbis/generic/server/asapi/v3/executor/entity/AbstractUpdateEntityExecutor.java
index 2e458809c86580f2f698bcbc16c88e06619c909d..5702cb26efe8598d9f5398a44d3bb58a74e99c03 100644
--- a/openbis/source/java/ch/ethz/sis/openbis/generic/server/asapi/v3/executor/entity/AbstractUpdateEntityExecutor.java
+++ b/openbis/source/java/ch/ethz/sis/openbis/generic/server/asapi/v3/executor/entity/AbstractUpdateEntityExecutor.java
@@ -57,6 +57,11 @@ public abstract class AbstractUpdateEntityExecutor<UPDATE extends IUpdate, PE ex
     @Override
     public void update(IOperationContext context, List<UPDATE> updates)
     {
+        if (updates == null || updates.isEmpty())
+        {
+            return;
+        }
+
         try
         {
             Map<UPDATE, PE> entitiesAll = new LinkedHashMap<UPDATE, PE>();
diff --git a/openbis/sourceTest/java/ch/ethz/sis/openbis/generic/server/asapi/v3/cache/SearchCacheTest.java b/openbis/sourceTest/java/ch/ethz/sis/openbis/generic/server/asapi/v3/cache/SearchCacheTest.java
index eeb7bd655b3128fa13e8062f9ba0c617b2bb8a30..d7853bb8f2a878f02131211f07d434786f462ef2 100644
--- a/openbis/sourceTest/java/ch/ethz/sis/openbis/generic/server/asapi/v3/cache/SearchCacheTest.java
+++ b/openbis/sourceTest/java/ch/ethz/sis/openbis/generic/server/asapi/v3/cache/SearchCacheTest.java
@@ -22,11 +22,10 @@ import static org.testng.Assert.fail;
 import java.io.ByteArrayInputStream;
 import java.io.Serializable;
 import java.lang.reflect.Method;
+import java.text.DecimalFormatSymbols;
 import java.util.Arrays;
 import java.util.UUID;
 
-import net.sf.ehcache.CacheManager;
-
 import org.apache.commons.io.FileUtils;
 import org.apache.log4j.Level;
 import org.testng.Assert;
@@ -34,15 +33,14 @@ import org.testng.annotations.AfterMethod;
 import org.testng.annotations.BeforeMethod;
 import org.testng.annotations.Test;
 
-import ch.ethz.sis.openbis.generic.server.asapi.v3.cache.SearchCache;
-import ch.ethz.sis.openbis.generic.server.asapi.v3.cache.SearchCacheEntry;
-import ch.ethz.sis.openbis.generic.server.asapi.v3.cache.SearchCacheKey;
 import ch.systemsx.cisd.common.logging.BufferedAppender;
 import ch.systemsx.cisd.common.logging.LogInitializer;
 import ch.systemsx.cisd.common.test.AssertionUtil;
 import ch.systemsx.cisd.openbis.generic.shared.util.RuntimeCache;
 import ch.systemsx.cisd.openbis.util.LogRecordingUtils;
 
+import net.sf.ehcache.CacheManager;
+
 /**
  * @author pkupczyk
  */
@@ -74,8 +72,8 @@ public class SearchCacheTest
                 .assertContainsLines(
                         "INFO  OPERATION.RuntimeCache - Cache size has been set to its default value."
                                 + " The default value is 25% (256m) of the memory available to the JVM (1g)."
-                                + " If you would like to change this value, then please set 'ch.ethz.sis.openbis.v3.searchcache.size' system property in openbis.conf file."
-                        , logRecorder.getLogContent());
+                                + " If you would like to change this value, then please set 'ch.ethz.sis.openbis.v3.searchcache.size' system property in openbis.conf file.",
+                        logRecorder.getLogContent());
     }
 
     @Test
@@ -94,10 +92,13 @@ public class SearchCacheTest
     {
         createCache(FileUtils.ONE_GB, "10%");
 
+        char decimalSeparator = DecimalFormatSymbols.getInstance().getDecimalSeparator();
+
         AssertionUtil
                 .assertContainsLines(
                         "INFO  OPERATION.RuntimeCache - Cache size was set to '10%' in 'ch.ethz.sis.openbis.v3.searchcache.size' system property."
-                                + " The memory available to the JVM is 1g which gives a cache size of 102.4m", logRecorder.getLogContent());
+                                + " The memory available to the JVM is 1g which gives a cache size of 102" + decimalSeparator + "4m",
+                        logRecorder.getLogContent());
     }
 
     @Test
diff --git a/openbis/sourceTest/java/ch/systemsx/cisd/openbis/systemtest/optimistic_locking/MultiThreadProjectOptimisticLockingTest.java b/openbis/sourceTest/java/ch/systemsx/cisd/openbis/systemtest/optimistic_locking/MultiThreadProjectOptimisticLockingTest.java
index 090d2686d0d93ec9108f5d4ac2b6615287f7a9fd..56c4173f38a350b83239ea7249beacc11ba5081f 100644
--- a/openbis/sourceTest/java/ch/systemsx/cisd/openbis/systemtest/optimistic_locking/MultiThreadProjectOptimisticLockingTest.java
+++ b/openbis/sourceTest/java/ch/systemsx/cisd/openbis/systemtest/optimistic_locking/MultiThreadProjectOptimisticLockingTest.java
@@ -108,11 +108,12 @@ public class MultiThreadProjectOptimisticLockingTest extends MultiThreadOptimist
         List<Experiment> experiments =
                 commonServer.listExperiments(systemSessionToken,
                         new ExperimentTypeBuilder().code(ToolBox.EXPERIMENT_TYPE_CODE)
-                                .getExperimentType(), toolBox
+                                .getExperimentType(),
+                        toolBox
                                 .createProjectIdentifier(toolBox.project1.getIdentifier()));
         assertEquals("[OLT-E1, OLT-E2, OLT-E3]", toolBox.extractCodes(experiments).toString());
         toolBox.checkModifierAndModificationDateOfProject1(timeIntervalChecker);
         assertEquals("authorize 1/2\n" + "authorize 2/2\n" + "createExperiments 1/2\n"
-                + "createExperiments 2/2\n" + "load related entities 0/0\n", stringBuilder.toString());
+                + "createExperiments 2/2\n", stringBuilder.toString());
     }
 }