also dump the writer/owner thread if any

java/com.sap.sailing.domain/src/com/sap/sailing/util/impl/LockUtil.java

@@ -37,12 +37,14 @@ public class LockUtil {
                     message.append(NUMBER_OF_SECONDS_TO_WAIT_FOR_LOCK);
                     message.append("s at ");
                     message.append(getCurrentStackTrace());
+                    Thread writer = lockParent.getWriter();
+                    if (writer != null) {
+                        message.append("\nThe current writer is:\n");
+                        appendThreadData(message, writer);
+                    }
                     message.append("\nThe current readers are:\n");
                     for (Thread reader : lockParent.getReaders()) {
-                        message.append(reader);
-                        message.append('\n');
-                        message.append(getStackTrace(reader));
-                        message.append('\n');
+                        appendThreadData(message, reader);
                     }
                     message.append("Trying again...");
                     logger.info(message.toString());
@@ -58,6 +60,13 @@ public class LockUtil {
             Thread.currentThread().interrupt();
         }
     }
+
+    private static void appendThreadData(StringBuilder message, Thread writer) {
+        message.append(writer);
+        message.append('\n');
+        message.append(getStackTrace(writer));
+        message.append('\n');
+    }
     
     public static void lockForRead(NamedReentrantReadWriteLock lock) {
         lock(lock.readLock(), "readLock "+lock.getName(), lock);

java/com.sap.sailing.domain/src/com/sap/sailing/util/impl/NamedReentrantReadWriteLock.java

@@ -165,6 +165,10 @@ public class NamedReentrantReadWriteLock extends ReentrantReadWriteLock implemen
         return new ArrayList<Thread>(readers);
     }
     
+    public Thread getWriter() {
+        return getOwner();
+    }
+    
     @Override
     public String toString() {
         return "ReentrantReadWriteLock "+getName()+" ("+(isFair()?"fair":"unfair")+")";