title: Hadoop error on Windows : java.lang.UnsatisfiedLinkError
body: <p>I am new to Hadoop and trying to execute my first mapreduce job of wordcount.
  However, whenever I am trying to do it, I am getting the below error:</p>
  
  <pre><code>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)
  </code></pre>
  
  <p>Also, when I do </p>
  
  <p>hadoop checknative -a </p>
  
  <p>it shows me following details:</p>
  
  <pre><code>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
  </code></pre>
  
  <p>Is there any way I can resolve this issue ?</p>