比較的単純なワークキューのユースケースでActiveMQを使用しようとしています。キューが1つあり、単純なプロデューサーとコンシューマーがあります。私の質問は、DBを継続的にロックする何が間違っているのかということです。これが私が継続的に受け取るメッセージです:
14/04/05 18:14:13 INFO store.SharedFileLocker: Database activemq-data\localhost\KahaDB\lock is locked... waiting 10 seconds for the database to be unlocked. Reason: Java.io.IOException: File 'activemq-data\localhost\KahaDB\lock' could not be locked.
私はプロデューサーとコンシューマーを別々のスレッドで同時に実行しています。最初はクラスレベルで接続していたので、それが問題だと思いましたが、putとgetを呼び出すたびに最初から接続を作成しても、ロックが発生します。
私は調査を行いましたが、解決策を見つけることができませんでした。 Windows7でActiveMQ5.9.0を実行しています。
CmdPromptで起動すると出力されるものは次のとおりです。
C:\activemq\Apache-activemq-5.9.0\bin>activemq
Java Runtime: Oracle Corporation 1.7.0_40 C:\Program Files\Java\jre7
Heap sizes: current=1005568k free=995061k max=1005568k
JVM args: -Dcom.Sun.management.jmxremote -Xms1G -Xmx1G -Djava.util.logging.config.file=logging.properties -Dhawtio.realm=activemq -Dhawtio.role=admins -Dhawtio.rolePrincipalCla
vemq.jaas.GroupPrincipal -Djava.security.auth.login.config=C:\activemq\Apache-activemq-5.9.0\bin\..\conf\login.config -Dactivemq.classpath=C:\activemq\Apache-activemq-5.9.0\bin\..\
che-activemq-5.9.0\bin\../conf;C:\activemq\Apache-activemq-5.9.0\bin\../conf; -Dactivemq.home=C:\activemq\Apache-activemq-5.9.0\bin\.. -Dactivemq.base=C:\activemq\Apache-activemq-5
mq.conf=C:\activemq\Apache-activemq-5.9.0\bin\..\conf -Dactivemq.data=C:\activemq\Apache-activemq-5.9.0\bin\..\data -Djava.io.tmpdir=C:\activemq\Apache-activemq-5.9.0\bin\..\data\t
Extensions classpath:
[C:\activemq\Apache-activemq-5.9.0\bin\..\lib,C:\activemq\Apache-activemq-5.9.0\bin\..\lib\camel,C:\activemq\Apache-activemq-5.9.0\bin\..\lib\optional,C:\activemq\Apache-activemq
b,C:\activemq\Apache-activemq-5.9.0\bin\..\lib\extra]
ACTIVEMQ_HOME: C:\activemq\Apache-activemq-5.9.0\bin\..
ACTIVEMQ_BASE: C:\activemq\Apache-activemq-5.9.0\bin\..
ACTIVEMQ_CONF: C:\activemq\Apache-activemq-5.9.0\bin\..\conf
ACTIVEMQ_DATA: C:\activemq\Apache-activemq-5.9.0\bin\..\data
Loading message broker from: xbean:activemq.xml
INFO | Refreshing org.Apache.activemq.xbean.XBeanBrokerFactory$1@5bf2a8f5: startup date [Sat Apr 05 17:42:42 EDT 2014]; root of context hierarchy
INFO | PListStore:[C:\activemq\Apache-activemq-5.9.0\bin\..\data\localhost\tmp_storage] started
INFO | Using Persistence Adapter: KahaDBPersistenceAdapter[C:\activemq\Apache-activemq-5.9.0\bin\..\data\kahadb]
INFO | KahaDB is version 5
INFO | Recovering from the journal ...
INFO | Recovery replayed 6935 operations from the journal in 0.416 seconds.
INFO | Apache ActiveMQ 5.9.0 (localhost, ID:Owner-PC-49614-1396734165637-0:1) is starting
INFO | Listening for connections at: tcp://Owner-PC:61616?maximumConnections=1000&wireFormat.maxFrameSize=104857600
INFO | Connector openwire started
INFO | Listening for connections at: amqp://Owner-PC:5673?maximumConnections=1000&wireFormat.maxFrameSize=104857600
INFO | Connector amqp started
INFO | Listening for connections at: stomp://Owner-PC:61613?maximumConnections=1000&wireFormat.maxFrameSize=104857600
INFO | Connector stomp started
INFO | Listening for connections at: mqtt://Owner-PC:1883?maximumConnections=1000&wireFormat.maxFrameSize=104857600
INFO | Connector mqtt started
INFO | Listening for connections at ws://Owner-PC:61614?maximumConnections=1000&wireFormat.maxFrameSize=104857600
INFO | Connector ws started
INFO | Apache ActiveMQ 5.9.0 (localhost, ID:Owner-PC-49614-1396734165637-0:1) started
INFO | For help or more information please see: http://activemq.Apache.org
INFO | Welcome to hawtio 1.2-M23 : http://hawt.io/ : Don't cha wish your console was hawt like me? ;-)
INFO | Starting hawtio authentication filter, JAAS realm: "activemq" authorized role: "admins" role principal classes: "org.Apache.activemq.jaas.GroupPrincipal"
INFO | Using file upload directory: C:\activemq\Apache-activemq-5.9.0\bin\..\data\tmp\uploads
INFO | jolokia-agent: Using access restrictor classpath:/jolokia-access.xml
INFO | ActiveMQ WebConsole available at http://localhost:8161/
INFO | Initializing Spring FrameworkServlet 'dispatcher'
これが私のJavaキューをActiveMQとして実装するためのものです(私はキューインターフェイスを持っており、これはImplです)
import com.google.gson.Gson;
import Java.util.Set;
import javax.jms.Connection;
import javax.jms.DeliveryMode;
import javax.jms.Destination;
import javax.jms.ExceptionListener;
import javax.jms.JMSException;
import javax.jms.MessageConsumer;
import javax.jms.MessageProducer;
import javax.jms.Session;
import javax.jms.TextMessage;
import org.Apache.activemq.ActiveMQConnectionFactory;
public class ActiveMQImpl implements Queue, ExceptionListener {
private String Host;
private String user;
private String pw;
public void init() {
}
public void close() {
}
public Message get() {
Message outMessage = null;
ActiveMQConnectionFactory connectionFactory = null;
Connection connection = null;
try {
if (connection == null) {
connectionFactory = new ActiveMQConnectionFactory("vm://localhost");
// Create a Connection
connection = connectionFactory.createConnection();
}
connection.start();
// Create a Session
Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
// Create the destination (Topic or Queue)
Destination destination = session.createQueue("work");
// Create a MessageConsumer from the Session to the Topic or Queue
MessageConsumer consumer = session.createConsumer(destination);
// Wait for a message
javax.jms.Message message = consumer.receive(1000);
if (message instanceof TextMessage) {
TextMessage textMessage = (TextMessage) message;
String text = textMessage.getText();
outMessage = new Gson().fromJson(text, Message.class);
// System.out.println("Received: " + text);
} else {
// System.out.println("Received: " + message);
}
consumer.close();
// session.commit();
session.close();
//connection.close();
} catch (Exception e) {
System.out.println("Caught: " + e);
e.printStackTrace();
}
return outMessage;
}
public void put(Message inMessage) {
try {
ActiveMQConnectionFactory connectionFactory = null;
Connection prodConnection = null;
connectionFactory = new ActiveMQConnectionFactory("vm://localhost");
prodConnection = connectionFactory.createConnection();
prodConnection.start();
Session session = prodConnection.createSession(false, Session.AUTO_ACKNOWLEDGE);
Destination destination = session.createQueue("work");
MessageProducer producer = session.createProducer(destination);
producer.setDeliveryMode(DeliveryMode.PERSISTENT);
producer.setTimeToLive(60000);
// Create a messages
String text = inMessage.toString();
TextMessage message = session.createTextMessage(text);
// Tell the producer to send the message
System.out.println("Sent message: " + text);
producer.send(message);
producer.close();
// session.commit();
session.close();
prodConnection.close();
} catch (Exception e) {
System.out.println("Caught: " + e);
onException(null);
e.printStackTrace();
}
}
public void onException(JMSException jmse) {
//send this to the error channel object...
System.out.println(jmse);
}
public void put(Set<Message> messages) {
try {
ActiveMQConnectionFactory connectionFactory=null;
Connection connection=null;
Connection prodConnection=null;
if (connection == null) {
connectionFactory = new ActiveMQConnectionFactory("vm://localhost?jms.useAsyncSend=true");
// Create a Connection
connection = connectionFactory.createConnection("admin", "admin");
}
connection.start();
// Create a Session
Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
// Create the destination (Topic or Queue)
Destination destination = session.createQueue("work");
// Create a MessageProducer from the Session to the Topic or Queue
MessageProducer producer = session.createProducer(destination);
producer.setDeliveryMode(DeliveryMode.PERSISTENT);
// Create a messages
for (Message inMessage : messages) {
String text = inMessage.toString();
TextMessage message = session.createTextMessage(text);
// Tell the producer to send the message
System.out.println("Sent message: " + text);
producer.send(message);
}
producer.close();
// session.commit();
session.close();
//connection.close();
} catch (Exception e) {
System.out.println("Caught: " + e);
onException(null);
e.printStackTrace();
}
}
}
これがプロデューサーとコンシューマーです(単純なデバッグクラス)
public class Producer {
public static void main(String[] args) {
Queue q = QueueFactory.create(QueueType.ACTIVEMQ);
try {
for (int i = 0; i < 10; i++) {
q.put(new Message("testimpl" + i, "whatever", i));
Thread.sleep(1000);
}
} catch (InterruptedException ex) {
Logger.getLogger(Producer.class.getName()).log(Level.SEVERE, null, ex);
}
}
}
public class Consumer {
public static void main(String[] args) {
Queue q = QueueFactory.create(QueueType.ACTIVEMQ);
try {
while (true) {
Message get = q.get();
System.out.println(get);
Thread.sleep(1000);
}
} catch (InterruptedException ex) {
Logger.getLogger(Consumer.class.getName()).log(Level.SEVERE, null, ex);
}
}
}
どんな助けでも大歓迎です。
以下を行う
kill Javaアクティブなmqのプロセス、open task manager -> go to process -> check for Java -> and right click and say end process
次に、<activemq_install_directory>/data/kahadb
に移動します
生成されたロックファイルを削除します
activemqを再起動してみてください
私にとって、これは私がこの問題に直面するたびに機能します
このロックを解除するために私が遭遇した唯一の解決策は-
同じ問題がありました。他にJavaサービス/ブローカーが稼働していませんでした。問題はかなりばかげていました-
使用しているユーザーがロックファイルのパスに書き込む権限を持っていることを確認してください。
linuxの場合:
Sudo killall Java
もう一度やり直してください