对于我的问题我刚发现这个问题 [Postgresql : Connection refused. Check that the hostname and port are correct and that the postmaster is accepting TCP/IP connections 但它对我没什么帮助。 我尝试了他们建议的一切。
我用
我还使用mySQL进行测试，一切正常（因此可以连接到VM等）
我的日志：
Jul 07, 2015 12:49:35 PM org.hibernate.annotations.common.reflection.java.JavaReflectionManager <clinit>
INFO: HCANN000001: Hibernate Commons Annotations {4.0.5.Final}
Jul 07, 2015 12:49:35 PM org.hibernate.Version logVersion
INFO: HHH000412: Hibernate Core {4.3.10.Final}
Jul 07, 2015 12:49:35 PM org.hibernate.cfg.Environment <clinit>
INFO: HHH000206: hibernate.properties not found
Jul 07, 2015 12:49:35 PM org.hibernate.cfg.Environment buildBytecodeProvider
INFO: HHH000021: Bytecode provider name : javassist
Jul 07, 2015 12:49:35 PM org.hibernate.cfg.Configuration configure
INFO: HHH000043: Configuring from resource: de/motza/init/hibernatePSQL.cfg.xml
Jul 07, 2015 12:49:35 PM org.hibernate.cfg.Configuration getConfigurationInputStream
INFO: HHH000040: Configuration resource: de/motza/init/hibernatePSQL.cfg.xml
Jul 07, 2015 12:49:35 PM org.hibernate.internal.util.xml.DTDEntityResolver resolveEntity
WARN: HHH000223: Recognized obsolete hibernate namespace http://hibernate.sourceforge.net/. Use namespace http://www.hibernate.org/dtd/ instead. Refer to Hibernate 3.6 Migration Guide!
Jul 07, 2015 12:49:35 PM org.hibernate.cfg.Configuration doConfigure
INFO: HHH000041: Configured SessionFactory: null
Jul 07, 2015 12:49:35 PM org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure
WARN: HHH000402: Using Hibernate built-in connection pool (not for production use!)
Jul 07, 2015 12:49:35 PM org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator
INFO: HHH000401: using driver [org.postgresql.Driver] at URL [jdbc:postgresql://10.158.251.251:5432/history_log]
Jul 07, 2015 12:49:35 PM org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator
INFO: HHH000046: Connection properties: {user=postgres, password=****}
Jul 07, 2015 12:49:35 PM org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator
INFO: HHH000006: Autocommit mode: false
Jul 07, 2015 12:49:35 PM org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure
INFO: HHH000115: Hibernate connection pool size: 1 (min=1)
我的错误：
Initial SessionFactory creation failed.
org.hibernate.exception.JDBCConnectionException: Error calling Driver#connect
at org.hibernate.exception.internal.SQLStateConversionDelegate.convert(SQLStateConversionDelegate.java:132)
at org.hibernate.engine.jdbc.connections.internal.BasicConnectionCreator$1$1.convert(BasicConnectionCreator.java:118)
at org.hibernate.engine.jdbc.connections.internal.BasicConnectionCreator.convertSqlException(BasicConnectionCreator.java:140)
at org.hibernate.engine.jdbc.connections.internal.DriverConnectionCreator.makeConnection(DriverConnectionCreator.java:58)
at org.hibernate.engine.jdbc.connections.internal.BasicConnectionCreator.createConnection(BasicConnectionCreator.java:75)
at org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl.configure(DriverManagerConnectionProviderImpl.java:106)
at org.hibernate.boot.registry.internal.StandardServiceRegistryImpl.configureService(StandardServiceRegistryImpl.java:111)
at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:234)
at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:206)
at org.hibernate.engine.jdbc.internal.JdbcServicesImpl.buildJdbcConnectionAccess(JdbcServicesImpl.java:260)
at org.hibernate.engine.jdbc.internal.JdbcServicesImpl.configure(JdbcServicesImpl.java:94)
at org.hibernate.boot.registry.internal.StandardServiceRegistryImpl.configureService(StandardServiceRegistryImpl.java:111)
at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:234)
at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:206)
at org.hibernate.cfg.Configuration.buildTypeRegistrations(Configuration.java:1887)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1845)
at de.motza.init.HibernateUtil.getSessionFactoryPSQL(HibernateUtil.java:35)
at de.motza.test.History_Log.testPSQL(History_Log.java:124)
at de.motza.test.History_Log.main(History_Log.java:99)
Caused by: org.postgresql.util.PSQLException: Connection to 10.158.251.251:5432 refused. Check that the hostname and port are correct and that the postmaster is accepting TCP/IP connections.
at org.postgresql.core.v3.ConnectionFactoryImpl.openConnectionImpl(ConnectionFactoryImpl.java:239)
at org.postgresql.core.ConnectionFactory.openConnection(ConnectionFactory.java:66)
at org.postgresql.jdbc2.AbstractJdbc2Connection.<init>(AbstractJdbc2Connection.java:127)
at org.postgresql.jdbc3.AbstractJdbc3Connection.<init>(AbstractJdbc3Connection.java:29)
at org.postgresql.jdbc3g.AbstractJdbc3gConnection.<init>(AbstractJdbc3gConnection.java:21)
at org.postgresql.jdbc4.AbstractJdbc4Connection.<init>(AbstractJdbc4Connection.java:41)
at org.postgresql.jdbc4.Jdbc4Connection.<init>(Jdbc4Connection.java:24)
at org.postgresql.Driver.makeConnection(Driver.java:414)
at org.postgresql.Driver.connect(Driver.java:282)
at org.hibernate.engine.jdbc.connections.internal.DriverConnectionCreator.makeConnection(DriverConnectionCreator.java:55)
... 15 more
Caused by: java.net.ConnectException: Connection refused: connect
at java.net.DualStackPlainSocketImpl.connect0(Native Method)
at java.net.DualStackPlainSocketImpl.socketConnect(Unknown Source)
at java.net.AbstractPlainSocketImpl.doConnect(Unknown Source)
at java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source)
at java.net.AbstractPlainSocketImpl.connect(Unknown Source)
at java.net.PlainSocketImpl.connect(Unknown Source)
at java.net.SocksSocketImpl.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at org.postgresql.core.PGStream.<init>(PGStream.java:61)
at org.postgresql.core.v3.ConnectionFactoryImpl.openConnectionImpl(ConnectionFactoryImpl.java:121)
... 24 more
我的hibernate配置
<hibernate-configuration>
<session-factory>
<!-- Database connection settings -->
<property name="connection.driver_class">org.postgresql.Driver</property>
<property name="connection.url">jdbc:postgresql://10.158.251.251:5432/history_log</property>
<property name="connection.username">postgres</property>
<property name="connection.password">postgres</property>
<!-- JDBC connection pool (use the built-in) -->
<property name="connection.pool_size">1</property>
<!-- SQL dialect -->
<property name="dialect">org.hibernate.dialect.PostgreSQLDialect</property>
<!-- Disable the second-level cache -->
<property name="cache.provider_class">org.hibernate.cache.NoCacheProvider</property>
<!-- Echo all executed SQL to stdout -->
<property name="show_sql">true</property>
<!-- create -> Drop the existing tables and create new one -->
<!-- create-drop -> Drop the existing tables and create new one, when sessionFactory closes, the table will be dropped -->
<!-- update -> updates table values, but saves data (not in production) -->
<!-- validate -> validate existing table and not update or change database, throws exception -->
<!-- for production leave this method out -->
<property name="hbm2ddl.auto">create</property>
<!-- Mention here all the model classes along with their package name -->
<mapping class="de.motza.test.LogEntry"/>
<mapping class="de.motza.test.Parameter"/>
</session-factory>
</hibernate-configuration>
我的Java代码创建会话工厂：
if (sessionFactoryPSQL == null || sessionFactoryPSQL.isClosed()) {
Configuration conf = new Configuration().configure("de/motza/init/hibernatePSQL.cfg.xml");
serviceRegistry = new StandardServiceRegistryBuilder().applySettings(conf.getProperties()).build();
try {
sessionFactoryPSQL = conf.buildSessionFactory(serviceRegistry);
} catch (Exception e) {
System.err.println("Initial SessionFactory creation failed.");
e.printStackTrace();
System.exit(0);
}
}
return sessionFactoryPSQL;
我还使用了sudo netstat -taupen | grep postgres
tcp 0 0 127.0.0.1:5432 0.0.0.0:* LISTEN 105 13970 3013/postgres
tcp6 0 0 ::1:5432 :::* LISTEN 105 13969 3013/postgres
udp6 0 0 ::1:37902 ::1:37902 ESTABLISHED 105 13981 3013/postgres
我的pg_hba.conf看起来像这样：
# Database administrative login by Unix domain socket
local all postgres peer
# TYPE DATABASE USER ADDRESS METHOD
# "local" is for Unix domain socket connections only
local all all peer
# IPv4 local connections:
host all all 127.0.0.1/32 md5
host all all 0.0.0.0/0 md5
# IPv6 local connections:
host all all ::1/128 md5
host all all 0.0.0.0/0 md5
# Allow replication connections from localhost, by a user with the
# replication privilege.
#local replication postgres peer
#host replication postgres 127.0.0.1/32 md5
#host replication postgres ::1/128 md5
我也尝试过不同的端口，但它仍然是相同的错误。
这是我学士论文的一部分，我不知道该怎么办...... 希望有人能帮助我
答案 0 :(得分：3)
Postgres正在聆听127.0.0.1:5432，但您正在尝试连接10.158.251.251:5432。即使这些IP地址被解析到同一台机器，它们在postmaster的眼中也不会相同（第一个是本地连接，第二个不是）。
将其他IP添加到pg_hba.conf中。
答案 1 :(得分：1)
除了@Kaymaman在Linux环境中的答案selinux可能会阻止Web应用程序连接到数据库。您可以使用命令setenforce 0
答案 2 :(得分：0)