我正在尝试根据我在线阅读的内容连接到AWS Athena,但我遇到了问题。
采取步骤
有什么想法吗?
错误消息:
.jcall中的错误(drv @ jdrv,“Ljava / sql / Connection;”,“connect”,as.character(url)[1],: java.sql.SQLException:必须提供AWS accessId / secretKey或AWS凭证提供程序
系统信息
sysname release version
"Linux" "4.4.0-62-generic" "#83-Ubuntu SMP Wed Jan 18 14:10:15 UTC 2017"
nodename machine login
"ip-***-**-**-***" "x86_64" "unknown"
user effective_user
"rstudio" "rstudio"
代码https://www.r-bloggers.com/interacting-with-amazon-athena-from-r/
library(RJDBC)
URL <- 'https://s3.amazonaws.com/athena-downloads/drivers/AthenaJDBC41-1.0.0.jar'
fil <- basename(URL)
if (!file.exists(fil)) download.file(URL, fil)
drv <- JDBC(driverClass="com.amazonaws.athena.jdbc.AthenaDriver", fil, identifier.quote="'")
con <- jdbcConnection <- dbConnect(drv, 'jdbc:awsathena://athena.us-east-1.amazonaws.com:443/',
s3_staging_dir="s3://mybucket",
user=Sys.getenv("myuser"),
password=Sys.getenv("mypassword"))
答案 0 :(得分:9)
Athena JDBC驱动程序期望您的AWS访问密钥ID为user
,密钥为password
:
accessKeyId <- "your access key id..."
secretKey <- "your secret key..."
jdbcConnection <- dbConnect(
drv,
'jdbc:awsathena://athena.us-east-1.amazonaws.com:443',
s3_staging_dir="s3://mybucket",
user=accessKeyId,
password=secretKey
)
R-bloggers文章使用Sys.getenv("ATHENA_USER")
和Sys.getenv("ATHENA_PASSWORD")
从环境变量中获取这些内容,但这是可选的。
已更新:使用带有来自R的Athena驱动程序的凭据提供程序
@Sam是正确的,凭据提供程序是处理AWS凭据的最佳实践。我推荐DefaultCredentialsProviderChain,它涵盖了从CLI配置文件,环境变量等加载凭据的几个选项。
lib
)下载AWS SDK for Java,特别是SDK jar,以及第三方依赖关系jar(third-party/lib
)目录。添加一些R代码,将所有jar文件添加到rJava的类路径
# Load JAR Files
library("rJava")
.jinit()
# Load AWS SDK jar
.jaddClassPath("/path/to/aws-java-sdk-1.11.98/lib/aws-java-sdk-1.11.98.jar")
# Add Third-Party JARs
jarFilePaths <- dir("/path/to/aws-java-sdk-1.11.98/third-party/lib/", full.names=TRUE, pattern=".jar")
for(i in 1:length(jarFilePaths)) {
.jaddClassPath(jarFilePaths[i])
}
配置Athena驱动程序以按名称
加载凭据提供程序类athenaConn <- dbConnect(
athenaDriver,
'jdbc:awsathena://athena.us-east-1.amazonaws.com:443',
s3_staging_dir="s3://mybucket",
aws_credentials_provider_class="com.amazonaws.auth.DefaultAWSCredentialsProviderChain"
)
设置类路径是关键。执行dbConnect
时,Athena驱动程序将尝试从JAR加载命名类,这将加载所有依赖项。如果类路径不包含SDK JAR,您将看到如下错误:
.jcall中的错误(drv @ jdrv,“Ljava / sql / Connection;”,“connect”,as.character(url)[1],: java.lang.NoClassDefFoundError:无法初始化类com.amazonaws.auth.DefaultAWSCredentialsProviderChain
如果没有第三方JAR引用,您可能会看到如下错误:
.jcall中的错误(drv @ jdrv,“Ljava / sql / Connection;”,“connect”,as.character(url)[1],: java.lang.NoClassDefFoundError:org / apache / commons / logging / LogFactory