连接到数据库时打开到服务器的套接字时出错答案

【问题标题】：Error opening socket to server while connecting to database连接到数据库时打开到服务器的套接字时出错
【发布时间】：2019-02-11 13:41:33
【问题描述】：

当我的应用程序服务器运行时，Jboss 无法连接到数据库。我正在运行 docker DB2 映像，而不是使用本地数据库。我在 Virtual Box 上运行 Docker。应用程序正在打开到 VirtualBox IP 而不是 localhost 的套接字。错误说：

错误说： Cannot create PoolableConnectionFactory : Exception java.net.ConnectException: Error opening socket to server /192.168.56.1 on port 50,000 with message: Connection refused: connect. ERRORCODE=-4499, SQLSTATE=08001....其中 192.168.56.1 是我的 Virtual Box Ip。我可以通过在本地运行的 DB2 客户端连接我的 DB2 docker 映像，但不能与我的应用程序连接。

日志：

2019-02-11 18:20:16,806  INFO [ost-startStop-1 ation.ConfigurationClassParser] - Properties location [/opt/demandtec/common/conf/jms.properties] not resolvable: class path resource [opt/demandtec/common/conf/jms.properties] cannot be opened because it does not exist
2019-02-11 18:20:17,877  INFO [ost-startStop-1 redAnnotationBeanPostProcessor] - JSR-330 'javax.inject.Inject' annotation found and supported for autowiring
2019-02-11 18:20:18,683  INFO [ost-startStop-1 dtec.message.DestReserverBeans] - Loading defalt queue topic definitions
2019-02-11 18:20:18,736  INFO [ost-startStop-1 mandtec.global.DTServiceConfig] - init jndi template
2019-02-11 18:20:18,764  INFO [ost-startStop-1 dtec.global.DTRemotingServices] - Start Locate Registry with port: 3099
2019-02-11 18:20:22,685  INFO [ost-startStop-1 ssage.activemq.DTAMQJmsService] - amq connect meta data created
2019-02-11 18:20:22,691  INFO [ost-startStop-1 .message.InitConnectionFactory] - export: QueueConnectionFactory as interface com.ibm.demandtec.mq.RemoteConnectFactory
2019-02-11 18:20:22,697  INFO [ost-startStop-1 .message.InitConnectionFactory] - export: TopicConnectionFactory as interface com.ibm.demandtec.mq.RemoteConnectFactory
2019-02-11 18:20:22,698  INFO [ost-startStop-1 .message.InitConnectionFactory] - export: PromoCPQueueConnectionFactory as interface com.ibm.demandtec.mq.RemoteConnectFactory
2019-02-11 18:20:22,698  INFO [ost-startStop-1 .message.InitConnectionFactory] - export: PerishableQueueConnectionFactory as interface com.ibm.demandtec.mq.RemoteConnectFactory
2019-02-11 18:20:22,698  INFO [ost-startStop-1 .message.InitConnectionFactory] - export: AMEQueueConnectionFactory as interface com.ibm.demandtec.mq.RemoteConnectFactory
2019-02-11 18:20:22,698  INFO [ost-startStop-1 .message.InitConnectionFactory] - export: FarmQueueConnectionFactory as interface com.ibm.demandtec.mq.RemoteConnectFactory
2019-02-11 18:20:22,720  INFO [ost-startStop-1 .message.InitConnectionFactory] - export: IAMTopicConnectionFactory as interface com.ibm.demandtec.mq.RemoteConnectFactory
2019-02-11 18:20:22,720  INFO [ost-startStop-1 .message.InitConnectionFactory] - export: CTSQueueConnectionFactory as interface com.ibm.demandtec.mq.RemoteConnectFactory
2019-02-11 18:20:22,721  INFO [ost-startStop-1 .message.InitConnectionFactory] - export: GlobalQueueConnectionFactory as interface com.ibm.demandtec.mq.RemoteConnectFactory
2019-02-11 18:20:22,722  INFO [ost-startStop-1 .message.InitConnectionFactory] - export: GlobalTopicConnectionFactory as interface com.ibm.demandtec.mq.RemoteConnectFactory
2019-02-11 18:20:22,731  INFO [ost-startStop-1 ndtec.mq.DTMQConnectionFactory] - Init class: org.apache.activemq.ActiveMQConnectionFactory, with: {brokerURL=tcp://IBM217-PC0BY3X9:61616, trustAllPackages=true}
2019-02-11 18:20:22,992  INFO [ost-startStop-1 ndtec.mq.DTMQConnectionFactory] - Init class: org.apache.activemq.ActiveMQConnectionFactory, with: {brokerURL=tcp://IBM217-PC0BY3X9:61616, clientID=IBM217-PC0BY3X9.IAM, trustAllPackages=true}
2019-02-11 18:20:23,357  WARN [ost-startStop-1 .commons.dbcp2.BasicDataSource] - The requested JMX name [demandtec.com_optimization] was not valid and will be ignored.
2019-02-11 18:20:53,117  INFO [pool-2-thread-1 .demandtec.global.DTMDBService] - Startup AdminMDB
2019-02-11 18:20:54,241  INFO [pool-2-thread-1 .demandtec.global.DTMDBService] - Startup IAM as clientid:IBM217-PC0BY3X9_appiam
2019-02-11 18:30:31,001  WARN [ost-startStop-1 emandtec.dal.ConnectionHandler] - JBossPoolException! Failed getting connection to Optimization for demandtec.com
2019-02-11 18:30:31,001  WARN [ost-startStop-1 emandtec.dal.ConnectionHandler] - cause: Cannot create PoolableConnectionFactory ([jcc][t4][2043][11550][4.22.29] Exception java.net.ConnectException: Error opening socket to server /192.168.56.1 on port 50,000 with message: Connection refused: connect. ERRORCODE=-4499, SQLSTATE=08001)
2019-02-11 18:30:31,001  WARN [ost-startStop-1 emandtec.dal.ConnectionHandler] - will attempt one more time.
2019-02-11 18:30:31,001  WARN [ost-startStop-1 .commons.dbcp2.BasicDataSource] - The requested JMX name [demandtec.com_optimization] was not valid and will be ignored.

数据库：DB2；操作系统：在 Oracle VirtualBox 上运行的 Windows7/ Docker；框架：J2EE；应用服务器：Jboss

【问题讨论】：

这可能是由很多原因造成的。您是否尝试过从容器中连接？然后从你的虚拟机中？
正如我所说，我可以通过在本地运行的 DB 客户端访问 DB2 映像，但连接时我的应用程序服务器显示此错误..
好的，所以，可能不是 docker 问题。配置错误？你有配置文件或一些代码要显示吗？
我正在开发的产品非常庞大..会花一些精力来查找数据库配置文件。你可以建议我在哪个方向进行调查或我可以采取哪些步骤。请在答案部分发布您的步骤，而不是评论。如果可行，您的 ans 可能会被接受。
我想，但我在这里做了很多猜测。什么框架？数据库类型？操作系统？答案可能具有误导性。当您尝试与 Jboss 连接时，是否有任何 DB2 日志，或者是否有其他东西拒绝访问？

标签： database docker networking jboss

【解决方案1】：

我想我在使用ibmcom/db2 社区版图片时遇到了同样的问题。当我在 MacOS 上启动容器时，它运行良好。然后如果我在virtualbox环境中启动容器，jdbc连接失败。

[jcc][10521][13706]Command : java com.ibm.db2.jcc.DB2Jcc -user db2inst1 -password ******** -url jdbc:db2://0.0.0.0:50000/testdb


[jcc][10512][13714]Failed to create connection.
  SQLCODE: -4499
  SQLSTATE: 08001
  Message: [jcc][t4][2030][11211][4.12.55] A communication error occurred during operations on the connection's underlying socket, socket input stream,
or socket output stream.  Error location: Reply.fill() - insufficient data (-1).  Message: Insufficient data. ERRORCODE=-4499, SQLSTATE=08001

有人怀疑是因为 ipv6。所以我运行docker run -itd --name mydb2 --privileged=true -p 50000:50000 -e LICENSE=accept -e DB2INST1_PASSWORD=test123 -e DBNAME=testdb -v /home/vagrant/database:/database ibmcom/db2 来启动一个容器。然后使用docker exec -it mydb2 bash 进入容器。删除几个 ipv6 行，只在 /etc/hosts 文件中关注。

127.0.0.1       localhost
172.17.0.2      def55f9a8b0f

退出并移除此容器。使用命令docker run -itd --name mydb2 --privileged=true -p 0.0.0.0:50000:50000 -e LICENSE=accept -e DB2INST1_PASSWORD=test123 -e DBNAME=testdb -v /home/vagrant/database:/database ibmcom/db2 重启容器。

CONTAINER ID   IMAGE        COMMAND                  CREATED         STATUS         PORTS                                                          NAMES
4fbaec4a46ac   ibmcom/db2   "/var/db2_setup/lib/…"   7 minutes ago   Up 7 minutes   22/tcp, 55000/tcp, 60006-60007/tcp, 0.0.0.0:50000->50000/tcp   mydb2

稍等片刻，JDBC 连接正常。

[jcc][10516][13709]Test Connection Successful.

DB product version = SQL11056
DB product name = DB2/LINUXX8664
DB URL = jdbc:db2://127.0.0.1:50000/testdb
DB Drivername = IBM Data Server Driver for JDBC and SQLJ
DB OS Name = Linux

【讨论】：