JBoss AS 7中的集群EJB不兼容 [英] Clustered EJBs not being balanced in JBoss AS 7

问题描述

我已经成功建立了2个JBoss AS 7实例集群，并部署了以下SLSB：

  @Stateless 
 @Remote（TestEJBRemote.class）
 @Clustered 
 public class TestEJB实现TestEJBRemote {
 private static final long serialVersionUID = 1L; 
 private static final Logger logger = Logger.getLogger（...）; 
 
 @Override 
 public void test（）{
 String nodeName = System.getProperty（jboss.node.name）; 
 logger.info（nodeName）; 
} 
}  

从日志文件中我可以看到，bean正确部署在簇。在客户端，我然后创建一些查询并调用 TestEJB 的实例的线程。但是，似乎所有实例都在同一个节点中。

这是jndi.properties文件：

  java.naming.factory.url.pkgs = org.jboss.ejb.client.naming  

和jboss-ejb-client.properties：

  endpoint.name = client-endpoint 
 remote.connectionprovider.create.options.org.xnio.Options.SSL_ENABLED = false 
 
 remote.connections =默认
 remote.connection.default.host = 192.168.0.1 
 remote.connection.default.port = 4447 
 remote.connection.default.connect.options.org.xnio.Options.SASL_POLICY_NOANONYMOUS = false 
 remote.connection.default.username = user 
 remote.connection.default.password = pass 
 
 remote.clusters = ejb 
 remote.cluster.ejb.clusternode.selector = org.jboss.ejb.client.RandomClusterNodeSelector  

在客户端我做 final InitialContext ctx = new InitialContext（）; 然后每个线程内的表单：

  String name =ejb：/ test // TestEJB！ + TestEJBRemote.class.getName（）; 
 TestEJBRemote remote =（TestEJBRemote）ctx.lookup（name）; 
 remote.test（）;  

我做错了什么？

更新

如果我只指定连接列表中的第二个节点，我得到： p>

java.lang.IllegalStateException：没有EJB接收器可用于处理[...]组合用于调用上下文org.jboss.ejb.client.EJBClientInvoc
ationContext

所以可能这个问题需要先解决...

更新2

最终通过在从属节点中设置应用程序用户来解决问题。之前，我试图连接作为管理用户，这是不起作用的。

负载平衡现在也可以，只要我指定一个从节点在连接列表中（在jboss-ejb-client.properties中）。如果我指定了主节点，则所有EJB将仅在该节点中结束。这个解决方案对我来说足够了。

解决方案

看起来你需要在属性构建中指定两个服务器。此外，它似乎有一个但是在JBoss 7.1中，所以你应该使用至少7.2，检查此链接，其中以下示例来自：

 属性属性= new Properties（）; 
 properties.put（endpoint.name，farecompare-client-endpoint）; 
 properties.put（remote.connectionprovider.create.options.org.xnio.Options.SSL_ENABLED，false）; 
 properties.put（remote.connections，cmc5101，cmc5102）; 
 properties.put（remote.connection.cmc5101.host，cmc5-101）; 
 properties.put（remote.connection.cmc5101.port，4447）; 
 properties.put（remote.connection.cmc5101.connect.options.org.xnio.Options.SASL_POLICY_NOANONYMOUS，false）; 
 properties.put（remote.connection.cmc5102.host，cmc5-102）; 
 properties.put（remote.connection.cmc5102.port，4447）; 
 properties.put（remote.connection.cmc5102.connect.options.org.xnio.Options.SASL_POLICY_NOANONYMOUS，false）; 
 PropertiesBasedEJBClientConfiguration configuration = new PropertiesBasedEJBClientConfiguration（properties）; 
 final ContextSelector ejbClientContextSelector = new ConfigBasedEJBClientContextSelector（configuration）; 
 final ContextSelector previousSelector = EJBClientContext.setSelector（ejbClientContextSelector）; 
 final Hashtable jndiProperties = new Hashtable（）; 
 jndiProperties.put（Context.URL_PKG_PREFIXES，org.jboss.ejb.client.naming）; 
 final Context context = new InitialContext（jndiProperties）; 
  

另外此链接可能会有所帮助。
另一个有用的链接。

I've successfully setup a cluster of 2 JBoss AS 7 instances, and deployed the following SLSB:

@Stateless
@Remote(TestEJBRemote.class)
@Clustered
public class TestEJB implements TestEJBRemote {
  private static final long serialVersionUID = 1L;
  private static final Logger logger = Logger.getLogger(...);

  @Override
  public void test() {
    String nodeName = System.getProperty("jboss.node.name");
    logger.info(nodeName);
  }
}

From the log files I can see that the bean is correctly deployed on the cluster. On the client side I then create a number of threads that lookup and invoke an instance of TestEJB. However, it appears that all instances end-up in the same node.

Here's the "jndi.properties" file:

java.naming.factory.url.pkgs=org.jboss.ejb.client.naming

And "jboss-ejb-client.properties":

endpoint.name=client-endpoint
remote.connectionprovider.create.options.org.xnio.Options.SSL_ENABLED=false

remote.connections=default
remote.connection.default.host=192.168.0.1
remote.connection.default.port=4447
remote.connection.default.connect.options.org.xnio.Options.SASL_POLICY_NOANONYMOUS=false
remote.connection.default.username=user
remote.connection.default.password=pass

remote.clusters=ejb
remote.cluster.ejb.clusternode.selector=org.jboss.ejb.client.RandomClusterNodeSelector

In the client I do final InitialContext ctx = new InitialContext(); and then form within each thread:

String name = "ejb:/test//TestEJB!" + TestEJBRemote.class.getName();
TestEJBRemote remote = (TestEJBRemote) ctx.lookup(name);
remote.test();

What is it that I'm doing wrong?

UPDATE

If I specify only the second node in the connection list, I get:

java.lang.IllegalStateException: No EJB receiver available for handling [...] combination for invocation context org.jboss.ejb.client.EJBClientInvoc ationContext

So probably this issue needs to be resolved first...

UPDATE 2

I solved the problem eventually, by setting up an application user in the slave node. Before, I was trying to connect as the management user, which didn't work.

The load-balancing now works as well, as long as I specify a slave node in the connection list (in "jboss-ejb-client.properties"). If I specify the master node, all EJBs will end-up in that node only. This solution is sufficient for me, however.

解决方案

It looks like you need to specify both servers in the properties building. Also it looks like there was a but in JBoss 7.1 so you should be using at least 7.2, check this link where the following sample was taken from:

Properties properties = new Properties();
properties.put("endpoint.name", "farecompare-client-endpoint");
properties.put("remote.connectionprovider.create.options.org.xnio.Options.SSL_ENABLED", "false");
properties.put("remote.connections", "cmc5101,cmc5102");
properties.put("remote.connection.cmc5101.host", "cmc5-101");
properties.put("remote.connection.cmc5101.port", "4447");
properties.put("remote.connection.cmc5101.connect.options.org.xnio.Options.SASL_POLICY_NOANONYMOUS", "false");
properties.put("remote.connection.cmc5102.host", "cmc5-102");
properties.put("remote.connection.cmc5102.port", "4447");
properties.put("remote.connection.cmc5102.connect.options.org.xnio.Options.SASL_POLICY_NOANONYMOUS", "false");
PropertiesBasedEJBClientConfiguration configuration = new PropertiesBasedEJBClientConfiguration(properties);
final ContextSelector ejbClientContextSelector = new ConfigBasedEJBClientContextSelector(configuration);
final ContextSelector previousSelector = EJBClientContext.setSelector(ejbClientContextSelector);
final Hashtable jndiProperties = new Hashtable();
jndiProperties.put(Context.URL_PKG_PREFIXES, "org.jboss.ejb.client.naming");
final Context context = new InitialContext(jndiProperties);

Also this link might be helpful. Another useful link.

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