Fix race condition in FILE_LOCK=SOCKET, which could result in the watchdog thread not running

h2/src/docsrc/html/changelog.html

@@ -21,6 +21,8 @@ Change Log
 
 <h2>Next Version (unreleased)</h2>
 <ul>
+<li>Fix race condition in FILE_LOCK=SOCKET, which could result in the watchdog thread not running  
+</li>
 <li>Experimental support for datatype TIMESTAMP WITH TIMEZONE
 </li>
 <li>Add support for ALTER TABLE ... RENAME CONSTRAINT .. TO ...

h2/src/main/org/h2/store/FileLock.java

@@ -439,6 +439,7 @@ public class FileLock implements Runnable {
             return;
         }
         save();
+        locked = true;
         watchdog = new Thread(this,
                 "H2 File Lock Watchdog (Socket) " + fileName);
         watchdog.setDaemon(true);