在 OpenShift 上重新启动 WildFly 时出现内存不足错误

Question

我在OpenShift上使用WildFly AS时遇到了问题。当我尝试在服务器上部署 WAR 时，我不断收到以下异常。

2014-12-20 04:31:33,072 INFO  [org.jboss.as.connector.deployment] (MSC service thread 1-7) JBAS010406: Registered connection factory java:/JmsXA
2014-12-20 04:31:33,444 ERROR [org.hornetq.core.client] (Thread-0 (HornetQ-client-global-threads-32821528)) HQ214017: Caught unexpected Throwable: java.lang.OutOfMemoryError: unable to create new native thread
        at java.lang.Thread.start0(Native Method) [rt.jar:1.8.0_05]
        at java.lang.Thread.start(Thread.java:714) [rt.jar:1.8.0_05]
        at java.util.concurrent.ThreadPoolExecutor.addWorker(ThreadPoolExecutor.java:950) [rt.jar:1.8.0_05]
        at java.util.concurrent.ThreadPoolExecutor.execute(ThreadPoolExecutor.java:1368) [rt.jar:1.8.0_05]
        at org.hornetq.core.client.impl.ClientSessionFactoryImpl$Channel0Handler.notifyTopologyChange(ClientSessionFactoryImpl.java:1618) [hornetq-core-client-2.4.5.Final.jar:]
        at org.hornetq.core.client.impl.ClientSessionFactoryImpl$Channel0Handler.handlePacket(ClientSessionFactoryImpl.java:1609) [hornetq-core-client-2.4.5.Final.jar:]
        at org.hornetq.core.protocol.core.impl.ChannelImpl.handlePacket(ChannelImpl.java:641) [hornetq-core-client-2.4.5.Final.jar:]
        at org.hornetq.core.protocol.core.impl.RemotingConnectionImpl.doBufferReceived(RemotingConnectionImpl.java:556) [hornetq-core-client-2.4.5.Final.jar:]
        at org.hornetq.core.protocol.core.impl.RemotingConnectionImpl.bufferReceived(RemotingConnectionImpl.java:532) [hornetq-core-client-2.4.5.Final.jar:]
        at org.hornetq.core.client.impl.ClientSessionFactoryImpl$DelegatingBufferHandler.bufferReceived(ClientSessionFactoryImpl.java:1712) [hornetq-core-client-2.4.5.Final.jar:]
        at org.hornetq.core.remoting.impl.invm.InVMConnection$1.run(InVMConnection.java:165) [hornetq-server-2.4.5.Final.jar:]
        at org.hornetq.utils.OrderedExecutorFactory$OrderedExecutor$1.run(OrderedExecutorFactory.java:104) [hornetq-core-client-2.4.5.Final.jar:]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [rt.jar:1.8.0_05]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [rt.jar:1.8.0_05]
        at java.lang.Thread.run(Thread.java:745) [rt.jar:1.8.0_05]

我不知道它是否相关，但我认为当我将休眠添加到我的应用程序时开始出现错误。这是hibernate.cfg.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
    <session-factory>
        <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>   
        <property name="connection.datasource">java:comp/env/jdbc/MyDataSource</property> 
        <property name="hibernate.current_session_context_class">thread</property>
        <!-- GENERAL CONFIGURATION -->
        <property name="connection.pool_size">1</property>
        <property name="hibernate.show_sql">false</property>
        <property name="hibernate.connection.release_mode">after_statement</property>
        <property name="hibernate.connection.autocommit">false</property>
        <property name="hibernate.connection.defaultAutoCommit">false</property>
        <!-- DB MAPING -->
    </session-factory>
</hibernate-configuration>

我的HibernateUtil.java ：

import org.hibernate.SessionFactory;
import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
import org.hibernate.cfg.Configuration;
import org.hibernate.service.ServiceRegistry;
public class HibernateUtil {
    private static SessionFactory sessionFactory;
    public static SessionFactory getSessionFactory() {
        if (sessionFactory == null) {
            // loads configuration and mappings
            Configuration configuration = new Configuration().configure();
            ServiceRegistry serviceRegistry
                = new StandardServiceRegistryBuilder()
                    .applySettings(configuration.getProperties()).build();
            // builds a session factory from the service registry
            sessionFactory = configuration.buildSessionFactory(serviceRegistry);           
        }
        return sessionFactory;
    }
}

我用于登录的部分 DaoImpl ：

  public User login(String username, String password) {
        User result = null;
        Session session = HibernateUtil.getSessionFactory().openSession();
        try {
            String sql = "select s from User s where username=:username and password=password(:password)";
            Query query = session.createQuery(sql);
            query.setString("username", username);
            query.setString("password", password);
            result = (User) query.uniqueResult();
        }
        finally {
            session.close();
        }
        return result;
    }

我不是 100% 解决休眠问题，因为我通过 SSH 连接，wildfly/standalone/deployments/ 年全部删除并重新启动应用程序，但在执行命令时我仍然遇到gear start错误。

2014-12-20 04:46:47,792 WARN  [org.hornetq.core.server] (hornetq-failure-check-thread) HQ222082: error on connection failure check: java.lang.OutOfMemoryError: unable to create new native thread
        at java.lang.Thread.start0(Native Method) [rt.jar:1.8.0_05]
        at java.lang.Thread.start(Thread.java:714) [rt.jar:1.8.0_05]
        at java.util.concurrent.ThreadPoolExecutor.addWorker(ThreadPoolExecutor.java:950) [rt.jar:1.8.0_05]
        at java.util.concurrent.ThreadPoolExecutor.execute(ThreadPoolExecutor.java:1357) [rt.jar:1.8.0_05]
        at org.hornetq.utils.OrderedExecutorFactory$OrderedExecutor.execute(OrderedExecutorFactory.java:133) [hornetq-core-client-2.4.5.Final.jar:]
        at org.hornetq.core.remoting.server.impl.RemotingServiceImpl$FailureCheckAndFlushThread.run(RemotingServiceImpl.java:739) [hornetq-server-2.4.5.Final.jar:]
2014-12-20 04:46:48,674 ERROR [stderr] (Thread-0 (HornetQ-scheduled-threads-30017644)) Exception in thread "Thread-0 (HornetQ-scheduled-threads-30017644)" java.lang.OutOfMemoryError: unable to create new native thread
2014-12-20 04:46:48,675 ERROR [stderr] (Thread-0 (HornetQ-scheduled-threads-30017644))  at java.lang.Thread.start0(Native Method)
2014-12-20 04:46:48,675 ERROR [stderr] (Thread-0 (HornetQ-scheduled-threads-30017644))  at java.lang.Thread.start(Thread.java:714)
2014-12-20 04:46:48,675 ERROR [stderr] (Thread-0 (HornetQ-scheduled-threads-30017644))  at java.util.concurrent.ThreadPoolExecutor.addWorker(ThreadPoolExecutor.java:950)
2014-12-20 04:46:48,676 ERROR [stderr] (Thread-0 (HornetQ-scheduled-threads-30017644))  at java.util.concurrent.ThreadPoolExecutor.processWorkerExit(ThreadPoolExecutor.java:1018)
2014-12-20 04:46:48,676 ERROR [stderr] (Thread-0 (HornetQ-scheduled-threads-30017644))  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1160)
2014-12-20 04:46:48,676 ERROR [stderr] (Thread-0 (HornetQ-scheduled-threads-30017644))  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
2014-12-20 04:46:48,677 ERROR [stderr] (Thread-0 (HornetQ-scheduled-threads-30017644))  at java.lang.Thread.run(Thread.java:745)
2014-12-20 04:46:49,675 ERROR [stderr] (Thread-2 (HornetQ-scheduled-threads-30017644)) Exception in thread "Thread-2 (HornetQ-scheduled-threads-30017644)" java.lang.OutOfMemoryError: unable to create new native thread

Answer 1

查看此线程。

我

发现我必须禁用不仅是消息传递，还有clustering.jgroups。但是，在那之后我偶尔会遇到OutOfMemoryError。我限制了数据库连接池。默认情况下，它是无限制的。

可悲的是，这还不够，我也和

• 托管执行程序服务最大线程数 25 -> 15
• JCA：2.0 线程 50 -> 20

仍然没有线程留给phpMyAdmin:(令人 沮丧。。。

Answer 2

小齿轮的线程限制为 250 个线程，请尝试将消息传递服务的线程 # 限制为 50(甚至尝试 20，具体取决于应用程序(。该配置位于standalone.xml文件中。

例如：

<subsystem xmlns="urn:jboss:domain:messaging:2.0">
    <hornetq-server>
        <thread-pool-max-size>50</thread-pool-max-size>
        <scheduled-thread-pool-max-size>50</scheduled-thread-pool-max-size>     
        <!-- ... -->
    </hornetq-server>
</subsystem>

我希望这有所帮助。