当 Docker 容器中的 Java MVC 应用程序尝试连接到另一个容器中的 MySQL 时，表不存在错误

Question

I have a Java-Hibernate MVC web application that uses a mySql database. It works fine on my computer but doesn't work when I try to run it using docker containers. I am using Docker Toolbox on Windows Home because the latest version of Docker requires Windows Professional.

-------Please ignore class and function and database names in my code snippets below, I quickly changed the names to retain anonymity. I have carefully verified that in reality all the names are correct. ----------

I have an MVC web application running on Tomcat in one container and a mySql database running in the other. I think my application can connect to the database because I am able to load the home page in my web application in one of the Docker containers without error. But when I try to put something in one of the MySql tables I get the following error:

 com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Table 'no_visits.visitors' doesn't exist
sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
java.lang.reflect.Constructor.newInstance(Constructor.java:423)
com.mysql.jdbc.Util.handleNewInstance(Util.java:425)
com.mysql.jdbc.Util.getInstance(Util.java:408)
com.mysql.jdbc.SQLError.createSQLException(SQLError.java:944)
com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3973)
com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3909)
com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2527)
com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2680)
com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2484)
com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1858)
com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:1966)
com.mchange.v2.c3p0.impl.NewProxyPreparedStatement.executeQuery(NewProxyPreparedStatement.java:353)
org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.extract(ResultSetReturnImpl.java:60)
org.hibernate.loader.Loader.getResultSet(Loader.java:2168)
org.hibernate.loader.Loader.executeQueryStatement(Loader.java:1931)
org.hibernate.loader.Loader.executeQueryStatement(Loader.java:1893)
org.hibernate.loader.Loader.doQuery(Loader.java:938)
org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:341)
org.hibernate.loader.Loader.doList(Loader.java:2692)
org.hibernate.loader.Loader.doList(Loader.java:2675)
org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2507)
org.hibernate.loader.Loader.list(Loader.java:2502)
org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:502)
org.hibernate.hql.internal.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:392)
org.hibernate.engine.query.spi.HQLQueryPlan.performList(HQLQueryPlan.java:216)
org.hibernate.internal.SessionImpl.list(SessionImpl.java:1489)
org.hibernate.query.internal.AbstractProducedQuery.doList(AbstractProducedQuery.java:1445)
org.hibernate.query.internal.AbstractProducedQuery.list(AbstractProducedQuery.java:1414)
org.hibernate.query.Query.getResultList(Query.java:146)
com.horse.novisit.dao.VisitDAOImpl.isVisit(isVisitImpl.java:79)
com.horse.novisit.service.VisitServiceImpl.isVisit(isVisitImpl.java:67)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
java.lang.reflect.Method.invoke(Method.java:498)
org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:343)
org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:197)
org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163)
org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:294)
org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:98)
org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:185)
org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:212)
com.sun.proxy.$Proxy52.isLongUrlInDB(Unknown Source)
com.horse.noToVisit.controller.visitController.postBigVisit(VisitController.java:47)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
java.lang.reflect.Method.invoke(Method.java:498)
org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:209)
org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:136)
org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:102)
org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:877)
org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:783)
org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:991)
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:925)
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:974)
org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:877)
javax.servlet.http.HttpServlet.service(HttpServlet.java:661)
org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:851)
javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

Answer 1

This isn't a direct answer, yet. Just a way to help you troubleshoot.

When the container is running:

docker ps

Find the process id

docker exec -it theidgoeshere bash

That will get you a bash shell into the running docker process. From there you can examine the log files of the running processes. You might not have bash available but that command is very useful. Read here: https://docs.docker.com/engine/reference/commandline/exec/

If this is all greek then I can point you to some more online material.

Answer 2

Try this :

docker network create -d bridge my-network

docker build -t my-mysqldb .

docker run -p 3306:3306 --network=my-network --name no-visit -itd my-mysqldb

docker build -t spring-mvc-image .

docker run -p 8080:8080 --network=my-network --name spring-mvc-container -itd -e DATABASE_HOST=no-visit -e DATABASE_PORT=3306 -e DATABASE_NAME=no_visit -e DATABASE_USER=visitor -e DATABASE_PASSWORD=visitor spring-mvc-image

And after this when you run docker ps it should show you both the containers in running state.

If problem still persists check the logs docker logs no-visit .

Answer 3

Problem solved. The name of the database in the .sql script I was running turned out to be wrong.