Index: oak-core/pom.xml
===================================================================
--- oak-core/pom.xml	(revision 1750606)
+++ oak-core/pom.xml	(working copy)
@@ -304,6 +304,12 @@
       <scope>test</scope>
     </dependency>
     <dependency>
+      <groupId>org.jboss.byteman</groupId>
+      <artifactId>byteman-bmunit</artifactId>
+      <version>3.0.6</version>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
       <groupId>org.slf4j</groupId>
       <artifactId>jul-to-slf4j</artifactId>
       <scope>test</scope>
Index: oak-core/src/test/java/org/apache/jackrabbit/oak/plugins/document/BMUtils.java
===================================================================
--- oak-core/src/test/java/org/apache/jackrabbit/oak/plugins/document/BMUtils.java	(nonexistent)
+++ oak-core/src/test/java/org/apache/jackrabbit/oak/plugins/document/BMUtils.java	(working copy)
@@ -0,0 +1,86 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.jackrabbit.oak.plugins.document;
+
+import java.util.Iterator;
+import java.util.List;
+
+import com.google.common.collect.Lists;
+
+import org.jboss.byteman.agent.submit.ScriptText;
+import org.jboss.byteman.agent.submit.Submit;
+import org.jboss.byteman.contrib.bmunit.BMUnit;
+import org.jboss.byteman.objectweb.asm.ClassReader;
+import org.jboss.byteman.objectweb.asm.tree.AbstractInsnNode;
+import org.jboss.byteman.objectweb.asm.tree.ClassNode;
+import org.jboss.byteman.objectweb.asm.tree.LineNumberNode;
+import org.jboss.byteman.objectweb.asm.tree.MethodNode;
+
+/**
+ * <code>BMUtils</code>...
+ */
+public class BMUtils {
+
+    public static void randomSleepsFor(Class clazz, double probability)
+            throws Exception {
+        List<ScriptText> scripts = Lists.newArrayList();
+        ClassReader reader = new ClassReader(clazz.getName());
+        ClassNode cn = new ClassNode();
+        reader.accept(cn, 0);
+        for (Object element : cn.methods) {
+            MethodNode mn = (MethodNode) element;
+            Iterator it = mn.instructions.iterator();
+            while (it.hasNext()) {
+                AbstractInsnNode instrNode = (AbstractInsnNode) it.next();
+                if (instrNode instanceof LineNumberNode) {
+                    scripts.add(generateBMScript(clazz, probability, mn.name, (LineNumberNode) instrNode));
+                }
+            }
+        }
+        new Submit(BMUnit.getHost(), BMUnit.getPort()).addScripts(scripts);
+    }
+
+    public static void deleteAllRules() throws Exception {
+        new Submit(BMUnit.getHost(), BMUnit.getPort()).deleteAllRules();
+    }
+
+    private static ScriptText generateBMScript(Class clazz,
+                                               double probability,
+                                               String methodName,
+                                               LineNumberNode lnn) {
+        String name = clazz.getName() + ":" + lnn.line;
+        return new ScriptText(name,
+                "RULE " + name + "\n" +
+                        "CLASS " + clazz.getName() + "\n" +
+                        "METHOD " + methodName + "\n" +
+                        "COMPILE \n" +
+                        "AT LINE " + lnn.line + "\n" +
+                        "IF true\n" +
+                        "DO " + BMUtils.class.getName() + ".randomSleep(" + probability + ")\n" +
+                        "ENDRULE");
+    }
+
+    public static void randomSleep(double p) {
+        if (Math.random() < p) {
+            try {
+                Thread.sleep(1);
+            } catch (InterruptedException e) {
+                // ignore
+            }
+        }
+    }
+}

Property changes on: oak-core/src/test/java/org/apache/jackrabbit/oak/plugins/document/BMUtils.java
___________________________________________________________________
Added: svn:eol-style
## -0,0 +1 ##
+native
\ No newline at end of property
Index: oak-jcr/pom.xml
===================================================================
--- oak-jcr/pom.xml	(revision 1750606)
+++ oak-jcr/pom.xml	(working copy)
@@ -299,6 +299,12 @@
       <scope>test</scope>
     </dependency>
     <dependency>
+      <groupId>org.jboss.byteman</groupId>
+      <artifactId>byteman-bmunit</artifactId>
+      <version>3.0.6</version>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
       <groupId>org.mongodb</groupId>
       <artifactId>mongo-java-driver</artifactId>
       <scope>test</scope>
Index: oak-jcr/src/test/java/org/apache/jackrabbit/oak/jcr/ConcurrentAddReferencesMongoTest.java
===================================================================
--- oak-jcr/src/test/java/org/apache/jackrabbit/oak/jcr/ConcurrentAddReferencesMongoTest.java	(nonexistent)
+++ oak-jcr/src/test/java/org/apache/jackrabbit/oak/jcr/ConcurrentAddReferencesMongoTest.java	(working copy)
@@ -0,0 +1,43 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.jackrabbit.oak.jcr;
+
+import org.apache.jackrabbit.oak.NodeStoreFixtures;
+import org.apache.jackrabbit.oak.plugins.document.BMUtils;
+import org.apache.jackrabbit.oak.plugins.document.mongo.MongoDocumentStore;
+import org.jboss.byteman.contrib.bmunit.BMUnitRunner;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.runner.RunWith;
+
+@RunWith(BMUnitRunner.class)
+public class ConcurrentAddReferencesMongoTest extends ConcurrentAddReferenceTest {
+
+    public ConcurrentAddReferencesMongoTest() {
+        super(NodeStoreFixtures.DOCUMENT_NS);
+    }
+
+    @Before
+    public void installRules() throws Exception {
+        BMUtils.randomSleepsFor(MongoDocumentStore.class, 0.000001);
+    }
+
+    @After
+    public void deleteRules() throws Exception {
+        BMUtils.deleteAllRules();
+    }
+}

Property changes on: oak-jcr/src/test/java/org/apache/jackrabbit/oak/jcr/ConcurrentAddReferencesMongoTest.java
___________________________________________________________________
Added: svn:eol-style
## -0,0 +1 ##
+native
\ No newline at end of property
Index: oak-jcr/src/test/java/org/apache/jackrabbit/oak/jcr/ConcurrentAddReferencesRDBTest.java
===================================================================
--- oak-jcr/src/test/java/org/apache/jackrabbit/oak/jcr/ConcurrentAddReferencesRDBTest.java	(nonexistent)
+++ oak-jcr/src/test/java/org/apache/jackrabbit/oak/jcr/ConcurrentAddReferencesRDBTest.java	(working copy)
@@ -0,0 +1,43 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.jackrabbit.oak.jcr;
+
+import org.apache.jackrabbit.oak.NodeStoreFixtures;
+import org.apache.jackrabbit.oak.plugins.document.BMUtils;
+import org.apache.jackrabbit.oak.plugins.document.rdb.RDBDocumentStore;
+import org.jboss.byteman.contrib.bmunit.BMUnitRunner;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.runner.RunWith;
+
+@RunWith(BMUnitRunner.class)
+public class ConcurrentAddReferencesRDBTest extends ConcurrentAddReferenceTest {
+
+    public ConcurrentAddReferencesRDBTest() {
+        super(NodeStoreFixtures.DOCUMENT_RDB);
+    }
+
+    @Before
+    public void installRules() throws Exception {
+        BMUtils.randomSleepsFor(RDBDocumentStore.class, 0.000001);
+    }
+
+    @After
+    public void deleteRules() throws Exception {
+        BMUtils.deleteAllRules();
+    }
+}

Property changes on: oak-jcr/src/test/java/org/apache/jackrabbit/oak/jcr/ConcurrentAddReferencesRDBTest.java
___________________________________________________________________
Added: svn:eol-style
## -0,0 +1 ##
+native
\ No newline at end of property