SQLException：Io异常：网络适配器无法建立连接

Question

当我获得登录ID时，密码...

http://localhost:8080/project_name 。 错误是服务器遇到内部错误（），阻止它无法满足此请求。**我正在使用jboss4.2.3，请让我知道问题出在哪里...？**

HTTP状态500-

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类型例外报告

信息

描述服务器遇到内部错误（），导致服务器无法满足此请求。

例外

javax.servlet.ServletException: Servlet.init() for servlet action threw exception
    org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:182)
...

根本原因

java.lang.RuntimeException: org.hibernate.exception.GenericJDBCException: Cannot open connection
    com.fanniemae.rbc.rollup.ui.RollupActionServlet.init(RollupActionServlet.java:26)
...

根本原因

org.hibernate.exception.GenericJDBCException: Cannot open connection
    org.hibernate.exception.SQLStateConverter.handledNonSpecificException(SQLStateConverter.java:103)

根本原因

org.jboss.util.NestedSQLException: Could not create connection; - nested throwable: (java.sql.SQLException: Io exception: The Network Adapter could not establish the connection); - nested throwable: (org.jboss.resource.JBossResourceException: Could not create connection; - nested throwable: (java.sql.SQLException: Io exception: The Network Adapter could not establish the connection))
    org.jboss.resource.adapter.jdbc.WrapperDataSource.getConnection(WrapperDataSource.java:95)
    org.hibernate.connection.DatasourceConnectionProvider.getConnection(DatasourceConnectionProvider.java:69)
    org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:423)
...

根本原因

org.jboss.resource.JBossResourceException: Could not create connection; - nested throwable: (java.sql.SQLException: Io exception: The Network Adapter could not establish the connection)
...

根本原因

java.sql.SQLException: Io exception: The Network Adapter could not establish the connection
    oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:112)
    oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:146)
    oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:255)
    oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:387)
    oracle.jdbc.driver.PhysicalConnection.<init>(PhysicalConnection.java:441)
    oracle.jdbc.driver.T4CConnection.<init>(T4CConnection.java:165)
    oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:35)
    oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:801)
    org.jboss.resource.adapter.jdbc.local.LocalManagedConnectionFactory.createManagedConnection(LocalManagedConnectionFactory.java:172)
    org.jboss.resource.connectionmanager.InternalManagedConnectionPool.createConnectionEventListener(InternalManagedConnectionPool.java:619)
    org.jboss.resource.connectionmanager.InternalManagedConnectionPool.getConnection(InternalManagedConnectionPool.java:264)
    org.jboss.resource.connectionmanager.JBossManagedConnectionPool$BasePool.getConnection(JBossManagedConnectionPool.java:575)
    org.jboss.resource.connectionmanager.BaseConnectionManager2.getManagedConnection(BaseConnectionManager2.java:347)
    org.jboss.resource.connectionmanager.TxConnectionManager.getManagedConnection(TxConnectionManager.java:330)
    org.jboss.resource.connectionmanager.BaseConnectionManager2.allocateConnection(BaseConnectionManager2.java:402)
    org.jboss.resource.connectionmanager.BaseConnectionManager2$ConnectionManagerProxy.allocateConnection(BaseConnectionManager2.java:849)
    org.jboss.resource.adapter.jdbc.WrapperDataSource.getConnection(WrapperDataSource.java:89)
    org.hibernate.connection.DatasourceConnectionProvider.getConnection(DatasourceConnectionProvider.java:69)
    org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:423)
    org.hibernate.jdbc.ConnectionManager.getConnection(ConnectionManager.java:144)
    org.hibernate.jdbc.AbstractBatcher.prepareQueryStatement(AbstractBatcher.java:139)
    org.hibernate.loader.Loader.prepareQueryStatement(Loader.java:1547)
    org.hibernate.loader.Loader.doQuery(Loader.java:673)
    org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:236)
    org.hibernate.loader.Loader.doList(Loader.java:2220)
    org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2104)
    org.hibernate.loader.Loader.list(Loader.java:2099)
    org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:378)
    org.hibernate.hql.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:338)
    org.hibernate.engine.query.HQLQueryPlan.performList(HQLQueryPlan.java:172)
    org.hibernate.impl.SessionImpl.list(SessionImpl.java:1121)
    org.hibernate.impl.QueryImpl.list(QueryImpl.java:79)
    com.fanniemae.rbc.rollup.service.RLSchemeMgmtService.getLoanAttributes(RLSchemeMgmtService.java:82)
    com.fanniemae.rbc.rollup.ui.UICache.initialize(UICache.java:42)
    com.fanniemae.rbc.rollup.ui.RollupActionServlet.init(RollupActionServlet.java:22)
    javax.servlet.GenericServlet.init(GenericServlet.java:212)
    org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:182)
    org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)
    org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
    org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157)
    org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:262)
    org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
    org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
    org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:446)
    java.lang.Thread.run(Thread.java:595)

Answer 1

java.sql.SQLException：Io异常：网络适配器无法建立连接

堆栈跟踪中的这一行看起来无法连接到数据库。 URL错误或服务器未运行。 检查服务器和URL。

Answer 2

您需要检查几件事，检查用户名和密码是否正常，检查服务器是否接受远程连接，检查用户的特权，检查数据库端口是否已打开（防火墙），检查本地防火墙并检查您的主机有权访问服务器（ping ip服务器）