### Eclipse Workspace Patch 1.0
#P org.eclipse.osgi
Index: supplement/src/org/eclipse/core/runtime/internal/adaptor/Locker_JavaNio.java
===================================================================
RCS file: /cvsroot/eclipse/org.eclipse.osgi/supplement/src/org/eclipse/core/runtime/internal/adaptor/Locker_JavaNio.java,v
retrieving revision 1.6
diff -u -r1.6 Locker_JavaNio.java
--- supplement/src/org/eclipse/core/runtime/internal/adaptor/Locker_JavaNio.java	7 May 2007 20:57:32 -0000	1.6
+++ supplement/src/org/eclipse/core/runtime/internal/adaptor/Locker_JavaNio.java	27 Nov 2007 09:57:43 -0000
@@ -12,15 +12,14 @@
 package org.eclipse.core.runtime.internal.adaptor;
 
 import java.io.*;
-import java.nio.channels.FileLock;
-import java.nio.channels.OverlappingFileLockException;
+import java.nio.channels.*;
 import org.eclipse.osgi.util.NLS;
 
 /**
  * Internal class.
  */
 public class Locker_JavaNio implements Locker {
-	private File lockFile;
+	private final File lockFile;
 	private FileLock fileLock;
 	private RandomAccessFile raFile;
 
@@ -31,7 +30,12 @@
 	public synchronized boolean lock() throws IOException {
 		raFile = new RandomAccessFile(lockFile, "rw"); //$NON-NLS-1$
 		try {
-			fileLock = raFile.getChannel().tryLock();
+			/*
+			 * fix for bug http://bugs.sun.com/view_bug.do?bug_id=6628575 and
+			 * https://bugs.eclipse.org/bugs/show_bug.cgi?id=44735#c17
+			 */
+			FileChannel fc = raFile.getChannel();
+			fileLock = fc.tryLock(0, fc.size(), false);
 		} catch (IOException ioe) {
 			// print exception if debugging
 			if (BasicLocation.DEBUG)
@@ -69,4 +73,32 @@
 			raFile = null;
 		}
 	}
+
+	public synchronized boolean isLocked() throws IOException {
+		if (fileLock != null)
+			return true;
+		try {
+			RandomAccessFile temp = new RandomAccessFile(lockFile, "rw"); //$NON-NLS-1$
+			FileLock tempLock = null;
+			try {
+				/*
+				 * fix for bug http://bugs.sun.com/view_bug.do?bug_id=6628575 and
+				 * https://bugs.eclipse.org/bugs/show_bug.cgi?id=44735#c17
+				 */
+				FileChannel fc = temp.getChannel();
+				tempLock = fc.tryLock(0, fc.size(), false);
+				if (tempLock != null) {
+					tempLock.release(); // allow IOException to propagate because that would mean it is still locked
+					return false;
+				}
+				return true;
+			} catch (OverlappingFileLockException e) {
+				return true;
+			} finally {
+				temp.close();
+			}
+		} catch (FileNotFoundException e) {
+			return false;
+		}
+	}
 }