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Posted to hdfs-dev@hadoop.apache.org by Sugato Samanta <su...@gmail.com> on 2013/07/15 13:24:24 UTC

File not found exception

Hi,

i am trying to read a file from HDFS using a java code, but i am getting
'File NotFound exception. However the same file is being read using *hdfs
dfs -tail airline/final_data.csv* command. Can you please help?

java -jar /home/adduser/TrainLogistics.jar --passes 10 --rate 5 --lambda
0.001 --input airline/final_data.csv --features 21 --output ./airline.model
--target CRSDepTime --categories 2 --predictors ArrDelay DayOfWeek --types
numeric
airline/final_data.csv
./airline.model
Types are:
CRSDepTime
Exception in thread "main" java.io.FileNotFoundException: File
airline/final_data.csv does not exist.
        at
org.apache.hadoop.fs.RawLocalFileSystem.getFileStatus(RawLocalFileSystem.java:361)
        at
org.apache.hadoop.fs.FilterFileSystem.getFileStatus(FilterFileSystem.java:245)
        at
org.apache.hadoop.fs.ChecksumFileSystem$ChecksumFSInputChecker.<init>(ChecksumFileSystem.java:125)
        at
org.apache.hadoop.fs.ChecksumFileSystem.open(ChecksumFileSystem.java:283)
        at org.apache.hadoop.fs.FileSystem.open(FileSystem.java:356)
        at org.accy.mahout.TrainLogistic2.open(TrainLogistic2.java:361)
        at
org.accy.mahout.TrainLogistic2.mainToOutput(TrainLogistic2.java:90)
        at org.accy.mahout.TrainLogistic2.main(TrainLogistic2.java:77)

Regards,
Sugato

Re: File not found exception

Posted by Jing Zhao <ji...@hortonworks.com>.

Hi Sugato,

    Do you want to read the data from hdfs? From the log it seems like
you're reading data from a "RawLocalFileSystem". Maybe you need to check if
you have set your default file system in the configuration correctly (
fs.default.name or fs.defaultFS, depending on your hadoop version)?

Thanks,
-Jing


On Mon, Jul 15, 2013 at 4:24 AM, Sugato Samanta <su...@gmail.com>wrote:

> Hi,
>
> i am trying to read a file from HDFS using a java code, but i am getting
> 'File NotFound exception. However the same file is being read using *hdfs
> dfs -tail airline/final_data.csv* command. Can you please help?
>
> java -jar /home/adduser/TrainLogistics.jar --passes 10 --rate 5 --lambda
> 0.001 --input airline/final_data.csv --features 21 --output ./airline.model
> --target CRSDepTime --categories 2 --predictors ArrDelay DayOfWeek --types
> numeric
> airline/final_data.csv
> ./airline.model
> Types are:
> CRSDepTime
> Exception in thread "main" java.io.FileNotFoundException: File
> airline/final_data.csv does not exist.
>         at
>
> org.apache.hadoop.fs.RawLocalFileSystem.getFileStatus(RawLocalFileSystem.java:361)
>         at
>
> org.apache.hadoop.fs.FilterFileSystem.getFileStatus(FilterFileSystem.java:245)
>         at
>
> org.apache.hadoop.fs.ChecksumFileSystem$ChecksumFSInputChecker.<init>(ChecksumFileSystem.java:125)
>         at
> org.apache.hadoop.fs.ChecksumFileSystem.open(ChecksumFileSystem.java:283)
>         at org.apache.hadoop.fs.FileSystem.open(FileSystem.java:356)
>         at org.accy.mahout.TrainLogistic2.open(TrainLogistic2.java:361)
>         at
> org.accy.mahout.TrainLogistic2.mainToOutput(TrainLogistic2.java:90)
>         at org.accy.mahout.TrainLogistic2.main(TrainLogistic2.java:77)
>
> Regards,
> Sugato
>