环境:
openSUSE42.2
hadoop2.6.0-cdh5.10.0
spark1.6.0-cdh5.10.0
按照网上的spark安装教程安装完之后,启动spark-shell,出现如下报错:
报错信息:
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/hadoop/fs/FSDataInputStream
at org.apache.spark.deploy.SparkSubmitArguments$$anonfun$mergeDefaultSparkProperties$1.apply(SparkSubmitArguments.scala:117)
at org.apache.spark.deploy.SparkSubmitArguments$$anonfun$mergeDefaultSparkProperties$1.apply(SparkSubmitArguments.scala:117)
at scala.Option.getOrElse(Option.scala:120)
at org.apache.spark.deploy.SparkSubmitArguments.mergeDefaultSparkProperties(SparkSubmitArguments.scala:117)
at org.apache.spark.deploy.SparkSubmitArguments.<init>(SparkSubmitArguments.scala:103)
at org.apache.spark.deploy.SparkSubmit$.main(SparkSubmit.scala:114)
at org.apache.spark.deploy.SparkSubmit.main(SparkSubmit.scala)
Caused by: java.lang.ClassNotFoundException: org.apache.hadoop.fs.FSDataInputStream
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:335)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 7 more
报错原因:
经过各种搜狗,Stack Overflow终于发现原因:
从spark1.4以后,所有spark的编译都是没有将hadoop的classpath编译进去的,所以必须在spark-env.sh中指定hadoop中的所有jar包。
具体设置如下:
在spark-evn.sh中添加
# 这里实际上就是执行一条hadoop的命令,将hadoop的classpath引一下
export export SPARK_DIST_CLASSPATH=$(${HADOOP_HOME}/bin/hadoop classpath)
具体的说明:
这里是官网上的说明
https://spark.apache.org/docs/latest/hadoop-provided.html