1、window操作系统的eclipse运行wordcount程序出现如下所示的错误:
Exception in thread "main" java.lang.UnsatisfiedLinkError: org.apache.hadoop.io.nativeio.NativeIO$Windows.access0(Ljava/lang/String;I)Z
at org.apache.hadoop.io.nativeio.NativeIO$Windows.access0(Native Method)
at org.apache.hadoop.io.nativeio.NativeIO$Windows.access(NativeIO.java:570)
at org.apache.hadoop.fs.FileUtil.canRead(FileUtil.java:977)
at org.apache.hadoop.util.DiskChecker.checkAccessByFileMethods(DiskChecker.java:173)
at org.apache.hadoop.util.DiskChecker.checkDirAccess(DiskChecker.java:160)
at org.apache.hadoop.util.DiskChecker.checkDir(DiskChecker.java:94)
at org.apache.hadoop.fs.LocalDirAllocator$AllocatorPerContext.confChanged(LocalDirAllocator.java:285)
at org.apache.hadoop.fs.LocalDirAllocator$AllocatorPerContext.getLocalPathForWrite(LocalDirAllocator.java:344)
at org.apache.hadoop.fs.LocalDirAllocator.getLocalPathForWrite(LocalDirAllocator.java:150)
at org.apache.hadoop.fs.LocalDirAllocator.getLocalPathForWrite(LocalDirAllocator.java:131)
at org.apache.hadoop.fs.LocalDirAllocator.getLocalPathForWrite(LocalDirAllocator.java:115)
at org.apache.hadoop.mapred.LocalDistributedCacheManager.setup(LocalDistributedCacheManager.java:131)
at org.apache.hadoop.mapred.LocalJobRunner$Job.<init>(LocalJobRunner.java:163)
at org.apache.hadoop.mapred.LocalJobRunner.submitJob(LocalJobRunner.java:731)
at org.apache.hadoop.mapreduce.JobSubmitter.submitJobInternal(JobSubmitter.java:432)
at org.apache.hadoop.mapreduce.Job$10.run(Job.java:1285)
at org.apache.hadoop.mapreduce.Job$10.run(Job.java:1282)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Unknown Source)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1614)
at org.apache.hadoop.mapreduce.Job.submit(Job.java:1282)
at org.apache.hadoop.mapreduce.Job.waitForCompletion(Job.java:1303)
at com.bie.hadoop.wordcount.WordCountRunner2.run(WordCountRunner2.java:54)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:84)
at com.bie.hadoop.wordcount.WordCountRunner2.main(WordCountRunner2.java:60)
暂时解决方法如下所示：
Windows的唯一方法用于检查当前进程的请求，在给定的路径的访问权限，所以我们先给以能进行访问，我们自己先修改源代码，return true 时允许访问。我们下载对应hadoop源代码，hadoop-2.6.0-src.tar.gz解压，
D:\biexiansheng\hadoop\hadoop-2.5.0-cdh5.3.6-src\hadoop-2.5.0-cdh5.3.6\hadoop-common-project\hadoop-common\src\main\java\org\apache\hadoop\io\nativeio
下NativeIO.java 复制到对应的Eclipse的project，然后修改557行为return true如图所示：
注意：包的路径必须这样，不能变：
org.apache.hadoop.io.nativeio.NativeIO$Windows.createDirectoryWithMode0(Ljava/lang/String;I)V
Exception in thread “main” java.lang.UnsatisfiedLinkError: org.apache.hadoop.io.nativeio.NativeIO$Windows.createDirectoryWithMode0(Ljava/lang/String;I)V1.程序报错MapReduce job 报错，报错信息如下：Exception in th...
java.lang.NoSuchMethodError: org.apache.commons.lang.StringUtils.endsWith(Ljava/lang/String;Ljava/lang/String;)Z
这是一个包冲突的典型错误，今天搞了一天。从错误信息就能看出是commons.lang出现的问题，解决方案：去掉新增加的conmons.lang依赖，加载其他的版本。1、在编译之后的目录查看加载的包版本：@~/git/fmp/service/target/fmp/WEB-INF/lib (coupon)$
java.lang.UnsatisfiedLinkError:org.apache.hadoop.util.NativeCrc32.nativeComputeChunkedSumsByteArray
/** * 上传 */ @Test public void putHDFS() throws IOException, URISyntaxException, InterruptedException { //创建配置信息 Configuration conf = new Configuration(); //...
Exception in thread “main“ java.lang.UnsatisfiedLinkError: no opencv_java455 in java.library.path:
java 中使用 openCV，报错Exception in thread "main" java.lang.UnsatisfiedLinkError: no opencv_java455 in java.library.path:
