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From oyste...@apache.org
Subject svn commit: r575670 - in /db/derby/code/trunk/java: engine/org/apache/derby/ engine/org/apache/derby/iapi/services/replication/slave/ engine/org/apache/derby/impl/db/ engine/org/apache/derby/impl/services/replication/slave/ engine/org/apache/derby/impl...
Date Fri, 14 Sep 2007 13:19:28 GMT
Author: oysteing
Date: Fri Sep 14 06:19:26 2007
New Revision: 575670

URL: http://svn.apache.org/viewvc?rev=575670&view=rev
Log:
DERBY-3021: Add a ReplicationSlave controller that will manage
            replication on the slave side
Contributed by Jørgen Løland

Added:
    db/derby/code/trunk/java/engine/org/apache/derby/iapi/services/replication/slave/
    db/derby/code/trunk/java/engine/org/apache/derby/iapi/services/replication/slave/SlaveFactory.java
  (with props)
    db/derby/code/trunk/java/engine/org/apache/derby/impl/services/replication/slave/SlaveController.java
  (with props)
Modified:
    db/derby/code/trunk/java/engine/org/apache/derby/impl/db/BasicDatabase.java
    db/derby/code/trunk/java/engine/org/apache/derby/impl/store/raw/RawStore.java
    db/derby/code/trunk/java/engine/org/apache/derby/impl/store/raw/log/LogToFile.java
    db/derby/code/trunk/java/engine/org/apache/derby/loc/messages.xml
    db/derby/code/trunk/java/engine/org/apache/derby/modules.properties
    db/derby/code/trunk/java/shared/org/apache/derby/shared/common/reference/SQLState.java
    db/derby/code/trunk/java/testing/org/apache/derbyTesting/functionTests/tests/lang/ErrorCodeTest.java

Added: db/derby/code/trunk/java/engine/org/apache/derby/iapi/services/replication/slave/SlaveFactory.java
URL: http://svn.apache.org/viewvc/db/derby/code/trunk/java/engine/org/apache/derby/iapi/services/replication/slave/SlaveFactory.java?rev=575670&view=auto
==============================================================================
--- db/derby/code/trunk/java/engine/org/apache/derby/iapi/services/replication/slave/SlaveFactory.java
(added)
+++ db/derby/code/trunk/java/engine/org/apache/derby/iapi/services/replication/slave/SlaveFactory.java
Fri Sep 14 06:19:26 2007
@@ -0,0 +1,116 @@
+/*
+ 
+   Derby - Class
+   org.apache.derby.iapi.services.replication.slave.SlaveFactory
+ 
+   Licensed to the Apache Software Foundation (ASF) under one or more
+   contributor license agreements.  See the NOTICE file distributed with
+   this work for additional information regarding copyright ownership.
+   The ASF licenses this file to you under the Apache License, Version 2.0
+   (the "License"); you may not use this file except in compliance with
+   the License.  You may obtain a copy of the License at
+ 
+      http://www.apache.org/licenses/LICENSE-2.0
+ 
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+ 
+*/
+
+package org.apache.derby.iapi.services.replication.slave;
+
+import org.apache.derby.iapi.error.StandardException;
+import org.apache.derby.iapi.reference.Property;
+
+import org.apache.derby.iapi.store.raw.RawStoreFactory;
+import org.apache.derby.iapi.store.raw.log.LogFactory;
+import org.apache.derby.iapi.store.raw.data.DataFactory;
+
+/**
+ * <p> 
+ * This is the interface for the replication slave controller
+ * service. The slave controller service is booted when this instance
+ * of Derby will have the replication slave role for this database.
+ * </p> 
+ * <p> 
+ * The replication slave service is responsible for managing all
+ * replication related functionality on the slave side of replication.
+ * This includes connecting to the master and apply log records
+ * received from the master.
+ * </p> 
+ */
+public interface SlaveFactory {
+
+    /** The name of the Slave Factory, used to boot the service.  */
+    public static final String MODULE =
+        "org.apache.derby.iapi.services.replication.slave.SlaveFactory";
+
+    /* Strings used as keys in the Properties objects*/
+
+    /** Property key to specify which port to listen to */
+    public static final String SLAVE_PORT =
+        Property.PROPERTY_RUNTIME_PREFIX + "replication.slave.slaveport";
+
+    /** Property key to specify replication mode */
+    public static final String REPLICATION_MODE =
+        Property.PROPERTY_RUNTIME_PREFIX + "replication.slave.mode";
+
+    /* Strings used as values in the Properties objects */
+
+    /**
+     * Property value used to indicate that the service should be
+     * booted in asynchronous replication mode.
+     */
+    public static final String SLAVE_MODE =
+        Property.PROPERTY_RUNTIME_PREFIX + "slavemode";
+
+
+    /* Required methods */
+
+    /**
+     * Start slave replication. This method establishes a network
+     * connection with the associated replication master and starts a
+     * daemon that applies operations received from the master (in the
+     * form of log records) to the local slave database.
+     *
+     * @param rawStore The RawStoreFactory for the database
+     * @param logFac The LogFactory ensuring recoverability for this database
+     */
+    public void startSlave(RawStoreFactory rawStore, LogFactory logFac);
+
+    /**
+     * Will perform all work that is needed to stop replication
+     */
+    public void stopSlave();
+
+    /**
+     * <p>
+     * Used to turn this slave instance of the database into a normal
+     * instance that clients can connect to. This is typically done in
+     * cases where a fatal error has happened on the master instance
+     * of the database, or when the master database is unreachable due
+     * to network problems.
+     * </p>
+     * <p>
+     * By calling failover, this slave instance of the database will
+     * be recovered so that all committed operations that have been
+     * received from the master are reflected here. On the other hand,
+     * operations from transactions where the commit log record has
+     * not been received from the master will not be reflected.
+     * </p>
+     * <p>
+     * Note that even though an operation has been executed (and even
+     * committed) on the master, it is not neccessarily reflected in
+     * the slave instance of the database. This depends on the
+     * replication strategy used by the MasterFactory.
+     * </p>
+     *
+     * @see org.apache.derby.iapi.services.replication.master.MasterFactory
+     * @see org.apache.derby.impl.services.replication.master.MasterController#flushedTo
+     */
+    public void failover();
+
+}

Propchange: db/derby/code/trunk/java/engine/org/apache/derby/iapi/services/replication/slave/SlaveFactory.java
------------------------------------------------------------------------------
    svn:eol-style = native

Modified: db/derby/code/trunk/java/engine/org/apache/derby/impl/db/BasicDatabase.java
URL: http://svn.apache.org/viewvc/db/derby/code/trunk/java/engine/org/apache/derby/impl/db/BasicDatabase.java?rev=575670&r1=575669&r2=575670&view=diff
==============================================================================
--- db/derby/code/trunk/java/engine/org/apache/derby/impl/db/BasicDatabase.java (original)
+++ db/derby/code/trunk/java/engine/org/apache/derby/impl/db/BasicDatabase.java Fri Sep 14
06:19:26 2007
@@ -73,6 +73,8 @@
 import org.apache.derby.io.StorageFile;
 import org.apache.derby.catalog.UUID;
 
+import org.apache.derby.iapi.services.replication.slave.SlaveFactory;
+
 import java.io.InputStream;
 import java.io.OutputStream;
 import java.io.Serializable;
@@ -133,6 +135,7 @@
 	private DateFormat timestampFormat;
 	private UUID		myUUID;
     private boolean normalizeToUpper = true;
+    private boolean inReplicationSlaveMode = false;
 
 	protected boolean lastToBoot; // is this class last to boot
 
@@ -147,6 +150,14 @@
 	public void boot(boolean create, Properties startParams)
 		throws StandardException
 	{
+
+        // Database is booted in replication slave mode. Make sure
+        // other clients are not able to connect
+        String slave = startParams.getProperty(SlaveFactory.REPLICATION_MODE);
+        if (slave != null && slave.equals(SlaveFactory.SLAVE_MODE)) {
+            inReplicationSlaveMode = true;
+        }
+
 		ModuleFactory monitor = Monitor.getMonitor();
 		if (create)
 		{
@@ -285,6 +296,13 @@
 
 	public LanguageConnectionContext setupConnection(ContextManager cm, String user, String
drdaID, String dbname)
 		throws StandardException {
+
+        if (inReplicationSlaveMode) {
+            // do not allow connections to a database that is
+            // currently in replication slave move
+            throw StandardException.newException(
+                        SQLState.CANNOT_CONNECT_TO_DB_IN_SLAVE_MODE, dbname);
+        }
 
 		TransactionController tc = getConnectionTransaction(cm);
 

Added: db/derby/code/trunk/java/engine/org/apache/derby/impl/services/replication/slave/SlaveController.java
URL: http://svn.apache.org/viewvc/db/derby/code/trunk/java/engine/org/apache/derby/impl/services/replication/slave/SlaveController.java?rev=575670&view=auto
==============================================================================
--- db/derby/code/trunk/java/engine/org/apache/derby/impl/services/replication/slave/SlaveController.java
(added)
+++ db/derby/code/trunk/java/engine/org/apache/derby/impl/services/replication/slave/SlaveController.java
Fri Sep 14 06:19:26 2007
@@ -0,0 +1,212 @@
+/*
+ 
+   Derby - Class
+   org.apache.derby.impl.services.replication.slave.SlaveController
+ 
+   Licensed to the Apache Software Foundation (ASF) under one or more
+   contributor license agreements.  See the NOTICE file distributed with
+   this work for additional information regarding copyright ownership.
+   The ASF licenses this file to you under the Apache License, Version 2.0
+   (the "License"); you may not use this file except in compliance with
+   the License.  You may obtain a copy of the License at
+ 
+      http://www.apache.org/licenses/LICENSE-2.0
+ 
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+ 
+ */
+
+package org.apache.derby.impl.services.replication.slave;
+
+import org.apache.derby.iapi.error.StandardException;
+import org.apache.derby.iapi.reference.SQLState;
+import org.apache.derby.iapi.services.monitor.ModuleControl;
+import org.apache.derby.iapi.services.monitor.ModuleSupportable;
+
+import org.apache.derby.iapi.store.raw.RawStoreFactory;
+import org.apache.derby.iapi.store.raw.log.LogFactory;
+
+import org.apache.derby.iapi.services.replication.slave.SlaveFactory;
+
+import java.util.Properties;
+
+/**
+ * <p> 
+ * This is an implementation of the replication slave controller
+ * service. The service is booted when this instance of Derby will
+ * have the replication slave role for this database.
+ * </p> 
+ * <p>
+ * Note: The current version of the class is far from complete. Code
+ * to control the replication slave behavior will be added as more
+ * parts of the replication functionality is added to Derby. 
+ * </p>
+ *
+ * @see SlaveFactory
+ */
+public class SlaveController implements SlaveFactory, ModuleControl,
+                                        ModuleSupportable {
+
+    private RawStoreFactory rawStoreFactory;
+    private LogFactory logFactory;
+    // waiting for code to go into trunk:
+    //    private NetworkReceive connection; 
+
+    private int slaveport;
+
+    /**
+     * Empty constructor required by Monitor.bootServiceModule
+     */
+    public SlaveController() { }
+
+    ////////////////////////////////////////////////////////////
+    // Implementation of methods from interface ModuleControl //
+    ////////////////////////////////////////////////////////////
+
+    /**
+     * Used by Monitor.bootServiceModule to start the service. It will
+     * set up basic variables 
+     *
+     * Not implemented yet
+     *
+     * @param create Currently ignored
+     * @param properties Properties used to start the service in the
+     * correct mode
+     * @exception StandardException Standard Derby exception policy,
+     * thrown on error.
+     */
+    public void boot(boolean create, Properties properties)
+        throws StandardException {
+
+        String port = properties.getProperty(SlaveFactory.SLAVE_PORT);
+        if (port != null) {
+            slaveport = new Integer(port).intValue();
+        }
+
+        // Added when Network Service has been committed to trunk
+        // connection = new NetworkReceive();
+
+        System.out.println("SlaveController booted");
+    }
+
+    /**
+     * Will tear down the replication slave service. Should be called
+     * after either stopSlave or failover have been called.
+     *
+     * Not implemented yet
+     */
+    public void stop() { }
+
+    ////////////////////////////////////////////////////////////////
+    // Implementation of methods from interface ModuleSupportable //
+    ////////////////////////////////////////////////////////////////
+
+    /**
+     * Used by Monitor.bootServiceModule to check if this class is
+     * usable for replication. To be usable, we require that slave
+     * replication mode is specified in startParams by checking that a
+     * property with key SlaveFactory.REPLICATION_MODE has the value
+     * SlaveFactory.SLAVE_MODE.
+     * @param startParams The properties used to start replication
+     * @return true if slave repliation is specified, meaning that
+     * this MasterController is a suitable implementation for the
+     * SlaveFactory service. False otherwise.
+     * @see ModuleSupportable#canSupport 
+     */
+    public boolean canSupport(Properties startParams) {
+        String modeParam =
+            startParams.getProperty(SlaveFactory.REPLICATION_MODE);
+
+        // currently only one attribute: slave replication mode
+        if (modeParam != null && 
+            modeParam.equals(SlaveFactory.SLAVE_MODE)) {
+            return true;
+        } else {
+            return false;
+        }
+    }
+
+    ///////////////////////////////////////////////////////////
+    // Implementation of methods from interface SlaveFactory //
+    ///////////////////////////////////////////////////////////
+
+    /**
+     * Start slave replication. This method establishes a network
+     * connection with the associated replication master and starts a
+     * daemon that applies operations received from the master (in the
+     * form of log records) to the local slave database.
+     *
+     * Not implemented yet
+     *
+     * @param rawStore The RawStoreFactory for the database
+     * @param logFac The LogFactory ensuring recoverability for this database
+     */
+    public void startSlave(RawStoreFactory rawStore, LogFactory logFac) {
+        // Added when Network Service has been committed to trunk:
+        // connection.connect(); // sets up a network connection to the slave
+
+        rawStoreFactory = rawStore;
+        logFactory = logFac;
+
+        // Add code that initializes replication by setting up a
+        // network connection with the master, receiving the database
+        // from the master, make a DaemonService for applying log
+        // records etc. Repliation should be up and running when this
+        // method returns.
+
+        System.out.println("SlaveController started");
+    }
+
+    /**
+     * Will perform all work that is needed to stop replication
+     *
+     * Not implemented yet
+     */
+    public void stopSlave() {
+        System.out.println("SlaveController stopped");
+    }
+
+    /**
+     * <p>
+     * Used to turn this slave instance of the database into a normal
+     * instance that clients can connect to. This is typically done in
+     * cases where a fatal error has happened on the master instance
+     * of the database, or when the master database is unreachable due
+     * to network problems.
+     * </p>
+     * <p>
+     * By calling failover, this slave instance of the database will
+     * be recovered so that all committed operations that have been
+     * received from the master are reflected here. On the other hand,
+     * operations from transactions where the commit log record has
+     * not been received from the master will not be reflected.
+     * </p>
+     * <p>
+     * Note that even though an operation has been executed (and even
+     * committed) on the master, it is not neccessarily reflected in
+     * the slave instance of the database. This depends on the
+     * replication strategy used by the MasterFactory.
+     * </p>
+     *
+     * @see org.apache.derby.iapi.services.replication.master.MasterFactory
+     * @see org.apache.derby.impl.services.replication.master.MasterController#flushedTo
+     */
+    public void failover() {
+        // Apply all received log records, thus completing the boot of
+        // this database. The database can be connected to after this.
+
+        // // complete recovery of the database 
+        // logFactory.setReplicationMode(false); 
+
+        // Added when Network Service has been committed to trunk:
+        // connection.shutdown();
+
+        System.out.println("SlaveController failover");
+    }
+
+
+}

Propchange: db/derby/code/trunk/java/engine/org/apache/derby/impl/services/replication/slave/SlaveController.java
------------------------------------------------------------------------------
    svn:eol-style = native

Modified: db/derby/code/trunk/java/engine/org/apache/derby/impl/store/raw/RawStore.java
URL: http://svn.apache.org/viewvc/db/derby/code/trunk/java/engine/org/apache/derby/impl/store/raw/RawStore.java?rev=575670&r1=575669&r2=575670&view=diff
==============================================================================
--- db/derby/code/trunk/java/engine/org/apache/derby/impl/store/raw/RawStore.java (original)
+++ db/derby/code/trunk/java/engine/org/apache/derby/impl/store/raw/RawStore.java Fri Sep
14 06:19:26 2007
@@ -89,6 +89,7 @@
 import java.lang.SecurityException;
 
 import org.apache.derby.iapi.services.replication.master.MasterFactory;
+import org.apache.derby.iapi.services.replication.slave.SlaveFactory;
 
 /**
 	A Raw store that implements the RawStoreFactory module by delegating all the
@@ -108,6 +109,7 @@
 	protected TransactionFactory	xactFactory;
 	protected DataFactory			dataFactory;
 	protected LogFactory			logFactory;
+    private SlaveFactory slaveFactory;
     private StorageFactory storageFactory;
 
 	private SecureRandom random;
@@ -173,6 +175,14 @@
 	public void	boot(boolean create, Properties properties)
 		throws StandardException
 	{
+
+        boolean inReplicationSlaveMode = false;
+
+        String slave = properties.getProperty(SlaveFactory.REPLICATION_MODE);
+        if (slave != null && slave.equals(SlaveFactory.SLAVE_MODE)) {
+            inReplicationSlaveMode = true;
+        }
+
 		dataDirectory = properties.getProperty(PersistentService.ROOT);
 		DaemonFactory daemonFactory =
 			(DaemonFactory)Monitor.startSystemModule(org.apache.derby.iapi.reference.Module.DaemonFactory);
@@ -315,6 +325,18 @@
             configureDatabaseForEncryption(properties, 
                                            newCipherFactory);
         }
+
+        if (inReplicationSlaveMode) {
+            // The LogFactory has already been booted in slave mode.
+            // Can now start slave replication by booting the
+            // SlaveFactory service
+            slaveFactory = (SlaveFactory) 
+                Monitor.bootServiceModule(create, this,
+                                          getSlaveFactoryModule(),
+                                          properties);
+            slaveFactory.startSlave(this, logFactory);
+        }
+
 	}
 
 	public void	stop() {
@@ -2023,6 +2045,10 @@
 	{
 		return TransactionFactory.MODULE;
 	}
+
+    public String getSlaveFactoryModule() {
+        return SlaveFactory.MODULE;
+    }
 
     public String getMasterFactoryModule()
     {

Modified: db/derby/code/trunk/java/engine/org/apache/derby/impl/store/raw/log/LogToFile.java
URL: http://svn.apache.org/viewvc/db/derby/code/trunk/java/engine/org/apache/derby/impl/store/raw/log/LogToFile.java?rev=575670&r1=575669&r2=575670&view=diff
==============================================================================
--- db/derby/code/trunk/java/engine/org/apache/derby/impl/store/raw/log/LogToFile.java (original)
+++ db/derby/code/trunk/java/engine/org/apache/derby/impl/store/raw/log/LogToFile.java Fri
Sep 14 06:19:26 2007
@@ -38,6 +38,8 @@
 import org.apache.derby.iapi.reference.Property;
 import org.apache.derby.iapi.reference.SQLState;
 
+import org.apache.derby.iapi.services.replication.slave.SlaveFactory;
+
 import org.apache.derby.iapi.services.daemon.DaemonService;
 import org.apache.derby.iapi.services.daemon.Serviceable;
 import org.apache.derby.iapi.services.context.ContextManager;
@@ -474,6 +476,8 @@
     private volatile boolean backupInProgress = false; 
    
 
+    private boolean inSlaveMode = false;
+
 	/**
 		MT- not needed for constructor
 	*/
@@ -2843,6 +2847,13 @@
 	*/
 	public void	boot(boolean create, Properties startParams) throws StandardException
 	{
+        // Is the database booted in replication slave mode?
+        String mode = startParams.getProperty(SlaveFactory.REPLICATION_MODE);
+        if (mode != null && mode.equals(SlaveFactory.SLAVE_MODE)) {
+            inSlaveMode = true; 
+            // will be used when slave functionality is added to this class
+        }
+
 		dataDirectory = startParams.getProperty(PersistentService.ROOT);
         
 		logDevice = startParams.getProperty(Attribute.LOG_DEVICE);

Modified: db/derby/code/trunk/java/engine/org/apache/derby/loc/messages.xml
URL: http://svn.apache.org/viewvc/db/derby/code/trunk/java/engine/org/apache/derby/loc/messages.xml?rev=575670&r1=575669&r2=575670&view=diff
==============================================================================
--- db/derby/code/trunk/java/engine/org/apache/derby/loc/messages.xml (original)
+++ db/derby/code/trunk/java/engine/org/apache/derby/loc/messages.xml Fri Sep 14 06:19:26
2007
@@ -365,6 +365,12 @@
             </msg>
 
             <msg>
+                <name>08004.C.7</name>
+                <text>Connection refused to database '{0}' because it is in replication
slave mode.</text>
+                <arg>databaseName</arg>
+            </msg>
+
+            <msg>
                 <name>08006.C.1</name>
                 <text>An error occurred during connect reset and the connection has
been terminated.  See chained exceptions for details.</text>
             </msg>

Modified: db/derby/code/trunk/java/engine/org/apache/derby/modules.properties
URL: http://svn.apache.org/viewvc/db/derby/code/trunk/java/engine/org/apache/derby/modules.properties?rev=575670&r1=575669&r2=575670&view=diff
==============================================================================
--- db/derby/code/trunk/java/engine/org/apache/derby/modules.properties (original)
+++ db/derby/code/trunk/java/engine/org/apache/derby/modules.properties Fri Sep 14 06:19:26
2007
@@ -306,9 +306,12 @@
 derby.module.rawStore=org.apache.derby.impl.store.raw.RawStore
 cloudscape.config.rawStore=derby
 
-# Replication
+# Replication Master
 derby.module.replication.master=org.apache.derby.impl.services.replication.master.MasterController
 cloudscape.config.replication.master=derby
+# Replication Slave
+derby.module.replication.slave=org.apache.derby.impl.services.replication.slave.SlaveController
+cloudscape.config.replication.slave=derby
 
 #
 # Support for read-only databases

Modified: db/derby/code/trunk/java/shared/org/apache/derby/shared/common/reference/SQLState.java
URL: http://svn.apache.org/viewvc/db/derby/code/trunk/java/shared/org/apache/derby/shared/common/reference/SQLState.java?rev=575670&r1=575669&r2=575670&view=diff
==============================================================================
--- db/derby/code/trunk/java/shared/org/apache/derby/shared/common/reference/SQLState.java
(original)
+++ db/derby/code/trunk/java/shared/org/apache/derby/shared/common/reference/SQLState.java
Fri Sep 14 06:19:26 2007
@@ -1582,6 +1582,7 @@
     String AUTH_ENCRYPT_NOT_DB_OWNER                        = "08004.C.5";
     String AUTH_HARD_UPGRADE_NOT_DB_OWNER                   = "08004.C.6";
     //DERBY-1828: AUTH_x_NOT_DB_OWNER used to be "2850H/I/J.C";
+    String CANNOT_CONNECT_TO_DB_IN_SLAVE_MODE               = "08004.C.7";
 
     // There can be multiple causes for 08003, which according
     // to SQL2003 spec means "connection does not exist"

Modified: db/derby/code/trunk/java/testing/org/apache/derbyTesting/functionTests/tests/lang/ErrorCodeTest.java
URL: http://svn.apache.org/viewvc/db/derby/code/trunk/java/testing/org/apache/derbyTesting/functionTests/tests/lang/ErrorCodeTest.java?rev=575670&r1=575669&r2=575670&view=diff
==============================================================================
--- db/derby/code/trunk/java/testing/org/apache/derbyTesting/functionTests/tests/lang/ErrorCodeTest.java
(original)
+++ db/derby/code/trunk/java/testing/org/apache/derbyTesting/functionTests/tests/lang/ErrorCodeTest.java
Fri Sep 14 06:19:26 2007
@@ -122,6 +122,7 @@
              {"08004","User '{0}' cannot shut down database '{1}'. Only the database owner
can perform this operation.","40000"},
              {"08004","User '{0}' cannot (re)encrypt database '{1}'. Only the database owner
can perform this operation.","40000"},
              {"08004","User '{0}' cannot hard upgrade database '{1}'. Only the database owner
can perform this operation.","40000"},
+             {"08004","Connect refused to database '{0}' because it is in replication slave
mode.","40000"},
              {"08006","An error occurred during connect reset and the connection has been
terminated.  See chained exceptions for details.","40000"},
              {"08006","Database '{0}' shutdown.","45000"},
              {"0A000","The DRDA command {0} is not currently implemented.  The connection
has been terminated.","40000"},



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