Server-less multi-connection mode: more bugs are fixed.

h2/src/docsrc/html/changelog.html

@@ -18,7 +18,8 @@ Change Log
 <h1>Change Log</h1>
 
 <h2>Next Version (unreleased)</h2>
-<ul><li>Shell tool: the file encoding workaround is now documented
+<ul><li>Server-less multi-connection mode: more bugs are fixed.
+</li><li>Shell tool: the file encoding workaround is now documented
     if you run java org.h2.tools.Shell -?.
 </li><li>The RunScript tool and SQL statement did not work with the compression method LZF.
 </li><li>Fulltext search: searching for NULL or an empty string threw an exception.

h2/src/main/org/h2/jdbc/JdbcConnection.java

@@ -1286,7 +1286,7 @@ public class JdbcConnection extends TraceObject implements Connection {
      * @throws SQLException if the connection or session is closed
      */
     private void checkClosedForWrite() throws SQLException {
-        checkClosed();
+        checkClosed(true);
     }
 
     /**