R Shiny 服务器上的 .jfindclass 错误

Question

I have my shinyapp deployed on Shiny Server. I use RJDBC::JDBC() method to connect to Redshift DB.

RedshiftJDBC42-1.2.1.1001.jar file is in the folder called "driver" which is in the same folder as app.R file, the argument 'driverClass' is "com.amazon.redshift.jdbc42.Driver" and 'classPath' argument I provide is ".../driver/RedshiftJDBC42-1.2.1.1001.jar" but when I want to run the app in my browser, I get the following message (in browser):

An error has occurred

The application failed to start.

The application exited during initialization.

In the log I find the following:

Error in .jfindClass(as.character(driverClass)[1]) : class not found Calls: runApp ... ..stacktraceon.. -> JDBC -> is.jnull -> .jfindClass

I tried to set the CLASSPATH ('...' classified folders ):

export CLASSPATH="/home/.../driver/RedshiftJDBC42-1.2.1.1001.jar"

but this does not work.

Please help.

Answer 1

将驱动程序放在 /opt make 下，例如 /opt/driver/driver/RedshiftJDBC42-1.2.1.1001.jar 仔细检查路径...区分大小写