The WebServlet did not close the database when undeploying the web application.

h2/src/main/org/h2/server/web/WebServer.java

@@ -15,7 +15,6 @@ import java.net.ServerSocket;
 import java.net.Socket;
 import java.sql.Connection;
 import java.sql.SQLException;
-import java.sql.Statement;
 import java.text.SimpleDateFormat;
 import java.util.ArrayList;
 import java.util.Collections;
@@ -332,12 +331,14 @@ public class WebServer implements Service {
     }
 
     public void stop() {
+        if (serverSocket != null) {
             try {
                 serverSocket.close();
             } catch (IOException e) {
-            // TODO log exception
+                traceError(e);
             }
             serverSocket = null;
+        }
         if (listenerThread != null) {
             try {
                 listenerThread.join(1000);
@@ -349,14 +350,7 @@ public class WebServer implements Service {
         ArrayList list = new ArrayList(sessions.values());
         for (int i = 0; i < list.size(); i++) {
             WebSession session = (WebSession) list.get(i);
-            Statement stat = session.executingStatement;
-            if (stat != null) {
-                try {
-                    stat.cancel();
-                } catch (Exception e) {
-                    // ignore
-                }
-            }
+            session.close();
         }
         list = new ArrayList(running);
         for (int i = 0; i < list.size(); i++) {
@@ -365,8 +359,7 @@ public class WebServer implements Service {
                 c.stopNow();
                 c.join(100);
             } catch (Exception e) {
-                // TODO log exception
-                e.printStackTrace();
+                traceError(e);
             }
         }
     }
@@ -387,9 +380,11 @@ public class WebServer implements Service {
      *
      * @param e the exception
      */
-    void traceError(Exception e) {
+    void traceError(Throwable e) {
+        if (trace) {
             e.printStackTrace();
         }
+    }
 
     /**
      * Check if this language is supported / translated.
@@ -676,7 +671,7 @@ public class WebServer implements Service {
      * The translate thread reads and writes the file translation.properties
      * once a second.
      */
-    private static class TranslateThread extends Thread {
+    private class TranslateThread extends Thread {
 
         private final File file = new File("translation.properties");
         private final Map translation;
@@ -714,8 +709,7 @@ public class WebServer implements Service {
                     }
                     Thread.sleep(1000);
                 } catch (Exception e) {
-                    e.printStackTrace();
-                    // ignore
+                    traceError(e);
                 }
             }
         }

h2/src/main/org/h2/server/web/WebServlet.java

@@ -53,6 +53,10 @@ public class WebServlet extends HttpServlet {
         server.init(args);
     }
 
+    public void destroy() {
+        server.stop();
+    }
+
     private boolean allow(HttpServletRequest req) {
         if (server.getAllowOthers()) {
             return true;

h2/src/main/org/h2/server/web/WebSession.java

@@ -125,29 +125,17 @@ class WebSession {
             tableRule = new DbContextRule(contents, DbContextRule.TABLE);
             schemaRule = new DbContextRule(contents, DbContextRule.SCHEMA);
             columnAliasRule = new DbContextRule(contents, DbContextRule.COLUMN_ALIAS);
-//            bnf.updateTopic("newTableName", new String[]{"TEST"});
-//            String[] schemas;
-//            if(contents.isMySQL) {
-//                schemas = new String[0];
-//            } else {
-//                schemas = new String[contents.schemas.length];
-//                for(int i=0; i<contents.schemas.length; i++) {
-//                    schemas[i] = contents.schemas[i].quotedName + ".";
-//                }
-//            }
-//            bnf.updateTopic("schemaName", schemas);
             newBnf.updateTopic("columnName", columnRule);
             newBnf.updateTopic("newTableAlias", newAliasRule);
             newBnf.updateTopic("tableAlias", aliasRule);
             newBnf.updateTopic("columnAlias", columnAliasRule);
             newBnf.updateTopic("tableName", tableRule);
             newBnf.updateTopic("schemaName", schemaRule);
-            // bnf.updateTopic("name", new String[]{""});
             newBnf.linkStatements();
             bnf = newBnf;
         } catch (Exception e) {
             // ok we don't have the bnf
-            e.printStackTrace();
+            server.traceError(e);
         }
     }
 
@@ -246,4 +234,22 @@ class WebSession {
         return shutdownServerOnDisconnect;
     }
 
+    void close() {
+        if (executingStatement != null) {
+            try {
+                executingStatement.cancel();
+            } catch (Exception e) {
+                // ignore
+            }
+        }
+        if (conn != null) {
+            try {
+                conn.close();
+            } catch (Exception e) {
+                // ignore
+            }
+        }
+
+    }
+
 }

h2/src/main/org/h2/server/web/WebThread.java

@@ -552,7 +552,7 @@ class WebThread extends Thread implements DatabaseEventListener {
             }
             session.put("autoCompleteList", result);
         } catch (Throwable e) {
-            e.printStackTrace();
+            server.traceError(e);
         }
         return "autoCompleteList.jsp";
     }
@@ -974,7 +974,7 @@ class WebThread extends Thread implements DatabaseEventListener {
             error = formatAsError(error);
             return error;
         } catch (OutOfMemoryError e2) {
-            e.printStackTrace();
+            server.traceError(e);
             return e.toString();
         }
     }