我想在Windows上使用Eclipse構建我的項目並在Linux羣集上執行。該項目取決於一些外部的jar,我使用eclipse的「Export-> Runnable JAR - >將所需的庫包裝到jar」封裝選項。我檢查了jar包含文件夾結構中的類,並且外部jar文件位於根文件夾中。Jar使用獨立的Hadoop,但不在實際的羣集上(java.lang.ClassNotFoundException:org.jfree.data.xy.XYDataset)
Hadoop上的獨立,Cygwin和Linux上,此工作正常,但實際的Hadoop Linux集羣上失敗了,當它試圖從第一外部罐子訪問類,扔了ClassNotFoundException
。
有沒有辦法強制Hadoop搜索jar,我認爲這會奏效。
10/07/16 11:44:59 INFO mapred.JobClient: Task Id : attempt_201007161003_0005_m_000001_0, Status : FAILED
Error: java.lang.ClassNotFoundException: org.jfree.data.xy.XYDataset
at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
at org.akintayo.analysis.ecg.preprocess.ReadPlotECG.plotECG(ReadPlotECG.java:27)
at org.akintayo.analysis.ecg.preprocess.BuildECGImages.writeECGImages(BuildECGImages.java:216)
at org.akintayo.analysis.ecg.preprocess.BuildECGImages.converSingleECGToImage(BuildECGImages.java:305)
at org.akintayo.analysis.ecg.preprocess.BuildECGImages.main(BuildECGImages.java:457)
at org.akintayo.hadoop.HadoopECGPreprocessByFile$MapTest.map(HadoopECGPreprocessByFile.java:208)
at org.akintayo.hadoop.HadoopECGPreprocessByFile$MapTest.map(HadoopECGPreprocessByFile.java:1)
at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:50)
at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:358)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:307)
at org.apache.hadoop.mapred.Child.main(Child.java:170)