我在shell中键入gradle cleanJar 在instance/part1目录中。输出如下。错误是“找不到org.apache.hadoop.mapred.jobconf的类文件”。为什么编译失败？
:clean UP-TO-DATE
:compileJava
Download http://conjars.org/repo/cascading/cascading-core/2.0.1/cascading-core-2.0.1.pom
Download http://conjars.org/repo/cascading/cascading-hadoop/2.0.1/cascading-hadoop-2.0.1.pom
Download http://conjars.org/repo/riffle/riffle/0.1-dev/riffle-0.1-dev.pom
Download http://repo1.maven.org/maven2/org/slf4j/slf4j-api/1.6.1/slf4j-api-1.6.1.pom
Download http://repo1.maven.org/maven2/org/slf4j/slf4j-parent/1.6.1/slf4j-parent-1.6.1.pom
Download http://repo1.maven.org/maven2/org/slf4j/slf4j-log4j12/1.6.1/slf4j-log4j12-1.6.1.pom
Download http://conjars.org/repo/thirdparty/jgrapht-jdk1.6/0.8.1/jgrapht-jdk1.6-0.8.1.pom
Download http://repo1.maven.org/maven2/org/codehaus/janino/janino/2.5.16/janino-2.5.16.pom
Download http://conjars.org/repo/cascading/cascading-core/2.0.1/cascading-core-2.0.1.jar
Download http://conjars.org/repo/cascading/cascading-hadoop/2.0.1/cascading-hadoop-2.0.1.jar
Download http://conjars.org/repo/riffle/riffle/0.1-dev/riffle-0.1-dev.jar
Download http://repo1.maven.org/maven2/org/slf4j/slf4j-api/1.6.1/slf4j-api-1.6.1.jar
Download http://repo1.maven.org/maven2/org/slf4j/slf4j-log4j12/1.6.1/slf4j-log4j12-1.6.1.jar
Download http://conjars.org/repo/thirdparty/jgrapht-jdk1.6/0.8.1/jgrapht-jdk1.6-0.8.1.jar
Download http://repo1.maven.org/maven2/org/codehaus/janino/janino/2.5.16/janino-2.5.16.jar
/home/is_admin/lab/cascading/Impatient/part1/src/main/java/impatient/Main.java:50: error: cannot access JobConf
Tap inTap = new Hfs( new TextDelimited( true, "\t" ), inPath );
^
class file for org.apache.hadoop.mapred.JobConf not found
1 error
:compileJava FAILED
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':compileJava'.
> Compilation failed; see the compiler error output for details.
* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.
BUILD FAILED
Total time: 22.599 secs
5条答案
按热度按时间eit6fx6z1#
似乎找不到类，请检查生成路径项中的库。
wfsdck302#
将hadoop-core-1.x.y.jar从hadoop发行版添加到path。
这对我来说是个很好的例子。我添加了eclipse构建路径。
将此添加到gradle dependencies{}部分
编译（group:'org.apache.hadoop'，name:'hadoop core'，version:'1.2.0'）
bjp0bcyl3#
我今天也遇到了同样的问题，我试着为不耐烦的教程级联。我已经解决了将以下内容添加到我的
build.gradle在dependencies章节：我想使用hadoop2.3.0，但我想您可以选择自己的hadoop版本。
ps：为了使用第一个
hadoop-mapred包，则必须添加以下内容：您可以在这里找到hadoop可能需要的所有回购。
w8biq8rn4#
谢谢lalit，添加下面这行代码对我来说很有用，不需要更改任何java版本。。
或者，我甚至可以在类路径中添加hadoop核心jar，并在gradle路径中提到它
lmyy7pcs5#
尝试使用Java6，gradle对Java7有一些已知的问题