日常错误

1.
这个问题出现在windows连接hadoop集群运行mapreduce任务，控制台报的错误。
2017-10-10 09:21:07,947 INFO  [main] Configuration.deprecation (Configuration.java:warnOnceIfDeprecated(1173)) - session.id is deprecated. Instead, use dfs.metrics.session-id
2017-10-10 09:21:07,950 INFO  [main] jvm.JvmMetrics (JvmMetrics.java:init(76)) - Initializing JVM Metrics with processName=JobTracker, sessionId=
Exception in thread "main" java.lang.UnsatisfiedLinkError: org.apache.hadoop.io.nativeio.NativeIO$Windows.createDirectoryWithMode0(Ljava/lang/String;I)V
	at org.apache.hadoop.io.nativeio.NativeIO$Windows.createDirectoryWithMode0(Native Method)
	at org.apache.hadoop.io.nativeio.NativeIO$Windows.createDirectoryWithMode(NativeIO.java:524)
	at org.apache.hadoop.fs.RawLocalFileSystem.mkOneDirWithMode(RawLocalFileSystem.java:478)
	at org.apache.hadoop.fs.RawLocalFileSystem.mkdirsWithOptionalPermission(RawLocalFileSystem.java:531)
	at org.apache.hadoop.fs.RawLocalFileSystem.mkdirs(RawLocalFileSystem.java:509)
	at org.apache.hadoop.fs.FilterFileSystem.mkdirs(FilterFileSystem.java:305)
	at org.apache.hadoop.mapreduce.JobSubmissionFiles.getStagingDir(JobSubmissionFiles.java:133)
	at org.apache.hadoop.mapreduce.JobSubmitter.submitJobInternal(JobSubmitter.java:144)
	at org.apache.hadoop.mapreduce.Job$10.run(Job.java:1290)
	at org.apache.hadoop.mapreduce.Job$10.run(Job.java:1287)
	at java.security.AccessController.doPrivileged(Native Method)
	at javax.security.auth.Subject.doAs(Subject.java:422)
	at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1698)
	at org.apache.hadoop.mapreduce.Job.submit(Job.java:1287)
	at org.apache.hadoop.mapreduce.Job.waitForCompletion(Job.java:1308)
	at org.MR.com.MR_clean.main(MR_clean.java:130)

网上有说环境不对的，我的环境没问题，最后发现是jar包的问题，集群是hadoop-2.5版本的，我的环境是2.7的。

解决方法：把2.7的jar包换成2.5的jar包

2.

at org.apache.hadoop.fs.FileSystem.checkPath(FileSystem.java:643)

at org.apache.hadoop.fs.RawLocalFileSystem.pathToFile(RawLocalFileSystem.java:80)

文件系统路径不对，改成本地的还是不行，后来在上面有一行提示：

util.ProcfsBasedProcessTree(ProcfsBasedProcessTree.java:isAvailable(181)) - ProcfsBasedProcessTree currentlyis supported only on Linux.

只能在linux上运行，移植到 linux 上运行成功。