Windows上的Hadoop错误:java.lang.UnsatisfiedLinkError

Question

我是Hadoop的新手,并尝试执行我的第一个mapcuce wordcount工作.但是,每当我尝试这样做时,我都会收到以下错误:

java.lang.UnsatisfiedLinkError: org.apache.hadoop.util.NativeCrc32.nativeCompute
ChunkedSumsByteArray(II[BI[BIILjava/lang/String;JZ)V
        at org.apache.hadoop.util.NativeCrc32.nativeComputeChunkedSumsByteArray(
Native Method)
        at org.apache.hadoop.util.NativeCrc32.calculateChunkedSumsByteArray(Nati
veCrc32.java:86)
        at org.apache.hadoop.util.DataChecksum.calculateChunkedSums(DataChecksum
.java:430)
        at org.apache.hadoop.fs.FSOutputSummer.writeChecksumChunks(FSOutputSumme
r.java:202)
        at org.apache.hadoop.fs.FSOutputSummer.flushBuffer(FSOutputSummer.java:1
63)
        at org.apache.hadoop.fs.FSOutputSummer.flushBuffer(FSOutputSummer.java:1
44)
        at org.apache.hadoop.hdfs.DFSOutputStream.close(DFSOutputStream.java:221
7)
        at org.apache.hadoop.fs.FSDataOutputStream$PositionCache.close(FSDataOut
putStream.java:72)
        at org.apache.hadoop.fs.FSDataOutputStream.close(FSDataOutputStream.java
:106)
        at org.apache.hadoop.io.IOUtils.cleanup(IOUtils.java:237)
        at org.apache.hadoop.io.IOUtils.closeStream(IOUtils.java:254)
        at org.apache.hadoop.io.IOUtils.copyBytes(IOUtils.java:61)
        at org.apache.hadoop.io.IOUtils.copyBytes(IOUtils.java:112)
        at org.apache.hadoop.fs.FileUtil.copy(FileUtil.java:366)
        at org.apache.hadoop.fs.FileUtil.copy(FileUtil.java:338)
        at org.apache.hadoop.fs.FileSystem.copyFromLocalFile(FileSystem.java:190
5)
        at org.apache.hadoop.fs.FileSystem.copyFromLocalFile(FileSystem.java:187
3)
        at org.apache.hadoop.fs.FileSystem.copyFromLocalFile(FileSystem.java:183
8)
        at org.apache.hadoop.mapreduce.JobResourceUploader.copyJar(JobResourceUp
loader.java:246)
        at org.apache.hadoop.mapreduce.JobResourceUploader.uploadFiles(JobResour
ceUploader.java:166)
        at org.apache.hadoop.mapreduce.JobSubmitter.copyAndConfigureFiles(JobSub
mitter.java:98)
        at org.apache.hadoop.mapreduce.JobSubmitter.submitJobInternal(JobSubmitt
er.java:191)
        at org.apache.hadoop.mapreduce.Job$10.run(Job.java:1297)
        at org.apache.hadoop.mapreduce.Job$10.run(Job.java:1294)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAs(Subject.java:415)
        at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInforma
tion.java:1656)
        at org.apache.hadoop.mapreduce.Job.submit(Job.java:1294)
        at org.apache.hadoop.mapreduce.Job.waitForCompletion(Job.java:1315)
        at org.apache.hadoop.examples.WordCount.main(WordCount.java:87)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at org.apache.hadoop.util.ProgramDriver$ProgramDescription.invoke(Progra
mDriver.java:71)
        at org.apache.hadoop.util.ProgramDriver.run(ProgramDriver.java:144)
        at org.apache.hadoop.examples.ExampleDriver.main(ExampleDriver.java:74)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at org.apache.hadoop.util.RunJar.run(RunJar.java:221)
        at org.apache.hadoop.util.RunJar.main(RunJar.java:136)

而且,当我这样做

hadoop checknative -a

它向我展示了以下细节:

Native library checking:
hadoop:  true C:\hadoop-2.6.1\bin\hadoop.dll
zlib:    false
snappy:  false
lz4:     true revision:43
bzip2:   false
openssl: false org.apache.hadoop.util.NativeCodeLoader.buildSupportsOpenssl()Z
winutils: true C:\hadoop-2.6.1\bin\winutils.exe
15/10/19 15:18:24 INFO util.ExitUtil: Exiting with status 1

有什么办法可以解决这个问题吗？

Answer 1

我有同样的问题。hadoop.dll从system32目录中删除并设置HADOOP_HOME它工作的环境变量后。

或者，使用可以添加一个 jvm 参数，如-Djava.library.path=<hadoop home>/lib/native.

Answer 2

我也遇到了这个错误，并且我解决了这个错误：

1. 您访问链接https://github.com/steveloughran/winutils
2. 使用您使用的版本下载文件“ winutils.exe”和“ hadoop.dll”
3. 将2个文件复制到HADOOP_HOME \ bin。

对我来说还好。 注意：如果使用的hadoop版本的2个文件“ winutils.exe”和“ hadoop.dll”不正确，则不正确