.jfindClass(as.character(driverClass)[1]) 中的错误:找不到类 [英] Error in .jfindClass(as.character(driverClass)[1]) : class not found

问题描述

>cassdrv <- JDBC("org.apache.cassandra.cql.jdbc.CassandraDriver",+ list.files("C://Users//VRavimurugan.GSIN//AppData//Roaming//RazorSQL//cassandra",pattern="jar$",full.names=T))

<块引用>

.jfindClass(as.character(driverClass)中的错误1) : 找不到类

尝试过这个，但没有成功 RJDBC Cassandra ->.jfindClass(as.character(driverClass)[1]) 中的错误:找不到类

解决方案

如本显然相关的问题，解决方案可能是删除该软件包，重新启动，然后重新安装.

就你而言:

1. 重启 R
2. 在干净的会话中运行以下命令:remove.packages("RJDBC")
3. 再次重启 R
4. 使用 install.packages("RJDBC") 重新安装软件包

这应该可以解决它.类似的过程应该适用于给出相同错误消息的其他包.

> cassdrv <- JDBC("org.apache.cassandra.cql.jdbc.CassandraDriver",
+                 list.files("C://Users//VRavimurugan.GSIN//AppData//Roaming//RazorSQL//cassandra",pattern="jar$",full.names=T))

Error in .jfindClass(as.character(driverClass)1) : class not found

Tried this , but no luck RJDBC Cassandra -> Error in .jfindClass(as.character(driverClass)[1]) : class not found

解决方案

As highlighted in this apparently related issue, a solution may be to remove the package, restart, and install it again.

In your case:

1. Restart R
2. In a clean session run the following command: remove.packages("RJDBC")
3. Restart R again
4. Re-install again the package with install.packages("RJDBC")

This should fix it. A similar procedure should work for other packages giving the same error message.

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