应用程序在ubuntu中表现怪异，但在Windows中工作正常

Question

I am having a simple java based web application (using servlets, jsp and struts framework). The application is using mysql as database server and tomcat as application server.

The application works fine on windows, but when I deploy the same application in ubuntu it gives me the following error:

### Error querying database.  Cause: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Table 'dbconnect.ACT_GE_PROPERTY' doesn't exist
The error occurred while setting parameters
SQL: select VALUE_ from ACT_GE_PROPERTY where NAME_ = 'schema.version'
Cause: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Table 'dbconnect.BDB_PROPERTIES' doesn't exist
at org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:23)
at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:104)
at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:95)
at org.apache.ibatis.session.defaults.DefaultSqlSession.selectOne(DefaultSqlSession.java:59)
at org.apache.ibatis.session.defaults.DefaultSqlSession.selectOne(DefaultSqlSession.java:54)
at org.activiti.engine.impl.db.DbSqlSession.getDbVersion(DbSqlSession.java:741)
at org.activiti.engine.impl.db.DbSqlSession.dbSchemaCheckVersion(DbSqlSession.java:697)

In the mysql database there are two tables created in the dbconnect database one with the uppercase name (ie ACT_GE_PROPERTY) and one in the lowercase (ie, act_ge_properties), these tables are been created automatically by the application.

When I run the application on windows only one table is created in lowercase as act_ge_properties, but in ubuntu two tables are created one in uppercase and one in lowercase ie, ACT_GE_PROPERTY and act_ge_properties.

I don't know what the problem is, can anyone help me out?

EDIT

Error:

04:08:20,856 [main] ERROR org.activiti.engine.impl.interceptor.CommandContext  - Error while closing command context
org.activiti.engine.ActivitiException: no activiti tables in db. set <property name="databaseSchemaUpdate" to value="true" or value="create-drop" (use create-drop for testing only!) in bean processEngineConfiguration in activiti.cfg.xml for automatic schema creation
at   org.activiti.engine.impl.db.DbSqlSession.dbSchemaCheckVersion(DbSqlSession.java:719)
at org.activiti.engine.impl.db.DbSqlSession.performSchemaOperationsProcessEngineBuild(DbSqlSession.java:1111)
at org.activiti.engine.impl.SchemaOperationsProcessEngineBuild.execute(SchemaOperationsProcessEngineBuild.java:25)
at org.activiti.engine.impl.interceptor.CommandExecutorImpl.execute(CommandExecutorImpl.java:24)
at org.activiti.engine.impl.interceptor.CommandContextInterceptor.execute(CommandContextInterceptor.java:61)
at org.activiti.engine.impl.interceptor.LogInterceptor.execute(LogInterceptor.java:31)
at org.activiti.engine.impl.ProcessEngineImpl.<init>(ProcessEngineImpl.java:76)
at org.activiti.engine.impl.cfg.ProcessEngineConfigurationImpl.buildProcessEngine(ProcessEngineConfigurationImpl.java:372)
at org.activiti.engine.ProcessEngines.buildProcessEngine(ProcessEngines.java:194)
at org.activiti.engine.ProcessEngines.initProcessEnginFromResource(ProcessEngines.java:167)
at org.activiti.engine.ProcessEngines.init(ProcessEngines.java:98)
at org.activiti.engine.ProcessEngines.getProcessEngine(ProcessEngines.java:224)
at org.activiti.engine.ProcessEngines.getDefaultProcessEngine(ProcessEngines.java:217)
at org.activiti.rest.servlet.ActivitiServletContextListener.contextInitialized(ActivitiServletContextListener.java:32)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4206)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4705)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:799)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:779)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:601)
at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:943)
at org.apache.catalina.startup.HostConfig.deployWARs(HostConfig.java:778)
at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:504)
at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1317)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:324)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:142)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1065)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:840)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1057)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:463)
at org.apache.catalina.core.StandardService.start(StandardService.java:525)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:754)
at org.apache.catalina.startup.Catalina.start(Catalina.java:595)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)
Caused by: org.apache.ibatis.exceptions.PersistenceException: 
### Error querying database.  Cause:   com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Table 'dbconnect.act_ge_property' doesn't exist
### The error may exist in org/activiti/db/mapping/entity/Property.xml
### The error may involve defaultParameterMap
### The error occurred while setting parameters
### SQL: select VALUE_ from ACT_GE_PROPERTY where NAME_ = 'schema.version'

Answer 1

On Windows, filenames on disk are case insensitive. However, on Linux, they are case sensitive.

On you Windows MySQL installation, your when your tables are written to the underlying disk file, this case insensitivity is then passed to your database application, meaning the tables names are not case sensitive.

On Linux, conversely, table names are case sensitive.

MySQL provides a Server System Variable to always cast table-names to lower-case:

http://dev.mysql.com/doc/refman/5.0/en/server-system-variables.html#sysvar_lower_case_table_names