Opening a large database was slow if there was a problem opening the previous time.

h2/src/main/org/h2/log/LogFile.java

@@ -384,6 +384,8 @@ public class LogFile {
         } catch (OutOfMemoryError e) {
             // OutOfMemoryError means not enough memory is allocated to the VM.
             // this is not necessarily at the end of the log file
+            // set the log system to read only so the current log file stays when closing
+            logSystem.setReadOnly(true);
             throw Message.convert(e);
         } catch (Throwable e) {
             database.getTrace(Trace.LOG).error("Error reading log file (non-fatal)", e);

h2/src/main/org/h2/log/LogSystem.java

@@ -649,6 +649,15 @@ public class LogSystem {
         this.disabled = disabled;
     }
     
+    /**
+     * Set the read only flag for this log system.
+     * 
+     * @param readOnly the new value
+     */
+    void setReadOnly(boolean readOnly) {
+        this.readOnly = readOnly;
+    }
+
     /**
      * Add a redo log entry to the file. This method is called when re-applying
      * the log entries (when opening a database).