CODEWITHSUNDEEP
rapache-sparkjdbchive
Alexandr Fruman
Alexandr Fruman

Reputation: 87

Connection between R and Hive (on Spark)

I'm trying to connect R and Hive (Spark). On my desktop (Windows 10, R-3.4.2) it works good, but on R-server (Linux, R - 3.4.4) I receive the error:

library(rJava)
library(RJDBC)
driver <- JDBC("org.apache.hive.jdbc.HiveDriver", "~/Drivers/Spark/hive-jdbc-1.2.1-spark2-amzn-0.jar",identifier.quote="`")
url <- "jdbc:hive2://<MyIP>:10001"
conn <- dbConnect(driver, url) 
Error in .jcall(drv@jdrv,"Ljava/sql/Connection;", "connect", as.character(url)[1],  : java.lang.NoClassDefFoundError: org/apache/http/client/CookieStore

What's wrong?

Upvotes: 0

Views: 690

Answers (1)

Alexandr Fruman
Alexandr Fruman

Reputation: 87

I found the solution:

library(rJava)
library(RJDBC)

options(java.parameters = '-Xmx256m')
hadoop_jar_dirs <- c('//home//ubuntu//spark-jdbc//')
clpath <- c()
for (d in hadoop_jar_dirs) {
  clpath <- c(clpath, list.files(d, pattern = 'jar', full.names = TRUE))
}
.jinit(classpath = clpath)
.jaddClassPath(clpath)

hive_jdbc_jar <- 'hive-jdbc-1.2.1-spark2-amzn-0.jar'
hive_driver <- 'org.apache.hive.jdbc.HiveDriver'
hive_url <- 'jdbc:hive2://<MyIP>:10001'
drv <- JDBC(hive_driver, hive_jdbc_jar)
conn <- dbConnect(drv, hive_url)
show_databases <- dbGetQuery(conn, "show databases")
show_databases

Upvotes: 2

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