我正在尝试遵循this示例在我的计算机上运行Hadoop Streaming。几天前我第一次尝试它时，它就可以正常工作，但是今天，当我再次尝试它时，##标题##我遇到了以下错误。
2018-10-19 04:34:05,406 WARN fs.LocalDirAllocator$AllocatorPerContext: /app/hadoop/tmp/mapred/local is not writable
org.apache.hadoop.util.DiskChecker$DiskErrorException: Directory is not writable: /app/hadoop/tmp/mapred/local
at org.apache.hadoop.util.DiskChecker.checkAccessByFileMethods(DiskChecker.java:167)
at org.apache.hadoop.util.DiskChecker.checkDirInternal(DiskChecker.java:100)
at org.apache.hadoop.util.DiskChecker.checkDir(DiskChecker.java:77)
at org.apache.hadoop.fs.LocalDirAllocator$AllocatorPerContext.confChanged(LocalDirAllocator.java:315)
at org.apache.hadoop.fs.LocalDirAllocator$AllocatorPerContext.getLocalPathForWrite(LocalDirAllocator.java:378)
at org.apache.hadoop.fs.LocalDirAllocator.getLocalPathForWrite(LocalDirAllocator.java:152)
at org.apache.hadoop.fs.LocalDirAllocator.getLocalPathForWrite(LocalDirAllocator.java:133)
at org.apache.hadoop.fs.LocalDirAllocator.getLocalPathForWrite(LocalDirAllocator.java:117)
at org.apache.hadoop.mapred.LocalDistributedCacheManager.setup(LocalDistributedCacheManager.java:124)
at org.apache.hadoop.mapred.LocalJobRunner$Job.<init>(LocalJobRunner.java:172)
at org.apache.hadoop.mapred.LocalJobRunner.submitJob(LocalJobRunner.java:788)
at org.apache.hadoop.mapreduce.JobSubmitter.submitJobInternal(JobSubmitter.java:254)
at org.apache.hadoop.mapreduce.Job$11.run(Job.java:1570)
at org.apache.hadoop.mapreduce.Job$11.run(Job.java:1567)
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:1729)
at org.apache.hadoop.mapreduce.Job.submit(Job.java:1567)
at org.apache.hadoop.mapred.JobClient$1.run(JobClient.java:576)
at org.apache.hadoop.mapred.JobClient$1.run(JobClient.java:571)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:422)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1729)
at org.apache.hadoop.mapred.JobClient.submitJobInternal(JobClient.java:571)
at org.apache.hadoop.mapred.JobClient.submitJob(JobClient.java:562)
at org.apache.hadoop.streaming.StreamJob.submitAndMonitorJob(StreamJob.java:1016)
at org.apache.hadoop.streaming.StreamJob.run(StreamJob.java:133)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:76)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:90)
at org.apache.hadoop.streaming.HadoopStreaming.main(HadoopStreaming.java:50)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.apache.hadoop.util.RunJar.run(RunJar.java:318)
at org.apache.hadoop.util.RunJar.main(RunJar.java:232)
2018-10-19 04:34:05,408 INFO mapreduce.JobSubmitter: Cleaning up the staging area file:/tmp/hadoop/mapred/staging/robby749242389/.staging/job_local749242389_0001
2018-10-19 04:34:05,409 ERROR streaming.StreamJob: Error Launching job : No space available in any of the local directories.
Streaming Command Failed!
显然/ app / hadoop / tmp / mapred / local目录不可写。
我尝试在线搜索解决方案，但遇到this问题，但这没有帮助。
我还运行了jps以确保我的Hadoop正常工作，而且看起来确实如此。
hduser@robby-HP-Pavilion-Notebook:/home/robby$ jps
3457 NodeManager
4088 Jps
2651 NameNode
3020 SecondaryNameNode
2828 DataNode
3325 ResourceManager