Hi,
As you found the source of the error I am not sure if the outputs that you
asked for are needed anymore. Nevertheless, see below
new File("D:\\dir\\myfile.csv").exists(); => true
FileSystem.getLocalFileSystem().getFileStatus(new Path(<relative
path>)).getPath(); => “file:/D:/dir/myfile.csv”
Fabian’s suggestion of specifying the file like “"file:/D:/dir/myfile.csv"?” =>
works!
Nevertheless, IMHO I would suggest to fix the issue as it is in general more
practical to specify paths in the form of D:\\dir\\myfile.csv … mainly as it
can be understood also by other file readers outside flink
From: Chesnay Schepler [mailto:ches...@apache.org]
Sent: Thursday, October 20, 2016 4:06 PM
To: user@flink.apache.org
Subject: Re: org.apache.flink.core.fs.Path error?
I believe i found the issue. The ContinuousFileMonitoringFunction never
converts the given string to a Path, but directly generates a URI from it.
On 20.10.2016 15:48, Fabian Hueske wrote:
The error message suggests that Flink tries to resolve "D:" as a file system
schema such as "file:" or "hdfs:".
Can you try to use specify your path as
"file:/D:/dir/myfile.csv"<file:///D:\dir\myfile.csv>?
Best, Fabian
2016-10-20 14:41 GMT+02:00 Radu Tudoran
<radu.tudo...@huawei.com<mailto:radu.tudo...@huawei.com>>:
Hi,
I know that Flink in general supports files also on windows. For example I just
tested successfully with relative file paths (e.g. place the file in the local
directory and give just the file name then everything is working correctly).
However with absolute paths it does not work as per my previous explanation.
Nevertheless, please see also the error log below.
Exception in thread "main"
org.apache.flink.runtime.client.JobExecutionException: Job execution failed.
at
org.apache.flink.runtime.jobmanager.JobManager$$anonfun$handleMessage$1$$anonfun$applyOrElse$8.apply$mcV$sp(JobManager.scala:822)
at
org.apache.flink.runtime.jobmanager.JobManager$$anonfun$handleMessage$1$$anonfun$applyOrElse$8.apply(JobManager.scala:768)
at
org.apache.flink.runtime.jobmanager.JobManager$$anonfun$handleMessage$1$$anonfun$applyOrElse$8.apply(JobManager.scala:768)
at
scala.concurrent.impl.Future$PromiseCompletingRunnable.liftedTree1$1(Future.scala:24)
at
scala.concurrent.impl.Future$PromiseCompletingRunnable.run(Future.scala:24)
at akka.dispatch.TaskInvocation.run(AbstractDispatcher.scala:41)
at
akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(AbstractDispatcher.scala:401)
at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
at
scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)
at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
at
scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)
Caused by: java.io.IOException: No file system found with scheme D, referenced
in file URI 'D:/dir/myfile.csv'.
at org.apache.flink.core.fs.FileSystem.get(FileSystem.java:297)
at
org.apache.flink.streaming.api.functions.source.ContinuousFileMonitoringFunction.run(ContinuousFileMonitoringFunction.java:120)
at
org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:80)
at
org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:53)
at
org.apache.flink.streaming.runtime.tasks.SourceStreamTask.run(SourceStreamTask.java:56)
at
org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:266)
at org.apache.flink.runtime.taskmanager.Task.run(Task.java:584)
at java.lang.Thread.run(Thread.java:745)
in addition to this there is some additional error if I dig through the output
logs
4:33:32,651 ERROR org.apache.hadoop.util.Shell
- Failed to locate the winutils binary in the hadoop binary path
java.io.IOException: Could not locate executable null\bin\winutils.exe in the
Hadoop binaries.
at org.apache.hadoop.util.Shell.getQualifiedBinPath(Shell.java:318)
at org.apache.hadoop.util.Shell.getWinUtilsPath(Shell.java:333)
at org.apache.hadoop.util.Shell.<clinit>(Shell.java:326)
at org.apache.hadoop.util.StringUtils.<clinit>(StringUtils.java:76)
at org.apache.hadoop.security.Groups.parseStaticMapping(Groups.java:92)
at org.apache.hadoop.security.Groups.<init>(Groups.java:76)
at
org.apache.hadoop.security.Groups.getUserToGroupsMappingService(Groups.java:239)
at
org.apache.hadoop.security.UserGroupInformation.initialize(UserGroupInformation.java:255)
at
org.apache.hadoop.security.UserGroupInformation.ensureInitialized(UserGroupInformation.java:232)
at
org.apache.hadoop.security.UserGroupInformation.loginUserFromSubject(UserGroupInformation.java:718)
at
org.apache.hadoop.security.UserGroupInformation.getLoginUser(UserGroupInformation.java:703)
at
org.apache.hadoop.security.UserGroupInformation.getCurrentUser(UserGroupInformation.java:605)
at
org.apache.hadoop.fs.viewfs.ViewFileSystem.<init>(ViewFileSystem.java:130)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
at
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
at java.lang.Class.newInstance(Class.java:379)
at java.util.ServiceLoader$LazyIterator.next(ServiceLoader.java:373)
at java.util.ServiceLoader$1.next(ServiceLoader.java:445)
at org.apache.hadoop.fs.FileSystem.loadFileSystems(FileSystem.java:2283)
at org.apache.hadoop.fs.FileSystem.getFileSystemClass(FileSystem.java:2294)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at
org.apache.flink.runtime.fs.hdfs.HadoopFileSystem.getDefaultHDFSClass(HadoopFileSystem.java:91)
at
org.apache.flink.runtime.fs.hdfs.HadoopFileSystem.<init>(HadoopFileSystem.java:75)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
at
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
at
org.apache.flink.core.fs.FileSystem.instantiateHadoopFileSystemWrapper(FileSystem.java:334)
at
org.apache.flink.core.fs.FileSystem.getHadoopWrapperClassNameForFileSystem(FileSystem.java:358)
at org.apache.flink.core.fs.FileSystem.get(FileSystem.java:280)
at
org.apache.flink.streaming.api.functions.source.ContinuousFileMonitoringFunction.run(ContinuousFileMonitoringFunction.java:120)
at
org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:80)
at
org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:53)
at
org.apache.flink.streaming.runtime.tasks.SourceStreamTask.run(SourceStreamTask.java:56)
at
org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:266)
at org.apache.flink.runtime.taskmanager.Task.run(Task.java:584)
at java.lang.Thread.run(Thread.java:745)
From: Chesnay Schepler [mailto:ches...@apache.org<mailto:ches...@apache.org>]
Sent: Thursday, October 20, 2016 2:22 PM
To: user@flink.apache.org<mailto:user@flink.apache.org>
Subject: Re: org.apache.flink.core.fs.Path error?
Hello Radu,
Flink can handle windows paths, this alone can't be the problem. If you could
post the error you are getting we may pinpoint the issue,
but right now i would suggest the usual: check that the path is indeed correct,
that you have sufficient permissions to access the file.
And yes, you can report problems here ;)
Regards,
Chesnay
On 20.10.2016 13:17, Radu Tudoran wrote:
Hi,
I am running a program that is suppose to read a CSV file from the local disk
(I am still using Flink 1.1..i did not check if the situation is the same for
1.2). I am currently running the test on a windows OS.
I am creating the path to the file e.g. “D:\\dir\\myfile.csv”
However, I see that the CSV reader converts this to a Path object from flink
core
“val inputFormat = new TupleCsvInputFormat(new Path(path), rowDelim,
fieldDelim, typeInfo)” In CSVTableSource
This ends up representing the initial path as an URI and changes \ to /
resulting in ““D:/dir/myfile.csv””. The problem is that this is never changed
when the file is actually open and accessed which leads to an error.
…not sure if signaling this error here is the best place or if I should have
used some other media..
Best regards,
Dr. Radu Tudoran
Senior Research Engineer - Big Data Expert
IT R&D Division
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HUAWEI TECHNOLOGIES Duesseldorf GmbH
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