If memory serves me, its in the hadoop-hdfs.jar file.
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-------- Original message --------
From: Roger Whitcomb <roger.whitc...@actian.com>
Date:04/11/2014 8:37 PM (GMT-05:00)
To: user@hadoop.apache.org
Subject: RE: Which Hadoop 2.x .jars are necessary for Apache Commons VFS HDFS
access?
Hi Dave,
Thanks for the responses. I guess I have a small question then: what
exact class(es) would it be looking for that it can't find? I have all the
.jar files I mentioned below on the classpath, and it is loading and executing
stuff in the "org.apache.hadoop.fs.FileSystem" class (according to the stack
trace below), so .... there are implementing classes I would guess, so what
.jar file would they be in?
Thanks,
~Roger
________________________________
From: david marion <dlmar...@hotmail.com>
Sent: Friday, April 11, 2014 4:55 PM
To: user@hadoop.apache.org
Subject: RE: Which Hadoop 2.x .jars are necessary for Apache Commons VFS HDFS
access?
Also, make sure that the jars on the classpath actually contain the HDFS file
system. I'm looking at:
No FileSystem for scheme: hdfs
which is an indicator for this condition.
Dave
________________________________
From: dlmar...@hotmail.com
To: user@hadoop.apache.org
Subject: RE: Which Hadoop 2.x .jars are necessary for Apache Commons VFS HDFS
access?
Date: Fri, 11 Apr 2014 23:48:48 +0000
Hi Roger,
I wrote the HDFS provider for Commons VFS. I went back and looked at the
source and tests, and I don't see anything wrong with what you are doing. I did
develop it against Hadoop 1.1.2 at the time, so there might be an issue that is
not accounted for with Hadoop 2. It was also not tested with security turned
on. Are you using security?
Dave
> From: roger.whitc...@actian.com
> To: user@hadoop.apache.org
> Subject: Which Hadoop 2.x .jars are necessary for Apache Commons VFS HDFS
> access?
> Date: Fri, 11 Apr 2014 20:20:06 +0000
>
> Hi,
> I'm fairly new to Hadoop, but not to Apache, and I'm having a newbie kind of
> issue browsing HDFS files. I have written an Apache Commons VFS (Virtual File
> System) browser for the Apache Pivot GUI framework (I'm the PMC Chair for
> Pivot: full disclosure). And now I'm trying to get this browser to work with
> HDFS to do HDFS browsing from our application. I'm running into a problem,
> which seems sort of basic, so I thought I'd ask here...
>
> So, I downloaded Hadoop 2.3.0 from one of the mirrors, and was able to track
> down sort of the minimum set of .jars necessary to at least (try to) connect
> using Commons VFS 2.1:
> commons-collections-3.2.1.jar
> commons-configuration-1.6.jar
> commons-lang-2.6.jar
> commons-vfs2-2.1-SNAPSHOT.jar
> guava-11.0.2.jar
> hadoop-auth-2.3.0.jar
> hadoop-common-2.3.0.jar
> log4j-1.2.17.jar
> slf4j-api-1.7.5.jar
> slf4j-log4j12-1.7.5.jar
>
> What's happening now is that I instantiated the HdfsProvider this way:
> private static DefaultFileSystemManager manager = null;
>
> static
> {
> manager = new DefaultFileSystemManager();
> try {
> manager.setFilesCache(new DefaultFilesCache());
> manager.addProvider("hdfs", new HdfsFileProvider());
> manager.setFileContentInfoFactory(new FileContentInfoFilenameFactory());
> manager.setFilesCache(new SoftRefFilesCache());
> manager.setReplicator(new DefaultFileReplicator());
> manager.setCacheStrategy(CacheStrategy.ON_RESOLVE);
> manager.init();
> }
> catch (final FileSystemException e) {
> throw new RuntimeException(Intl.getString("object#manager.setupError"), e);
> }
> }
>
> Then, I try to browse into an HDFS system this way:
> String url = String.format("hdfs://%1$s:%2$d/%3$s", "hadoop-master ", 50070,
> hdfsPath);
> return manager.resolveFile(url);
>
> Note: the client is running on Windows 7 (but could be any system that runs
> Java), and the target has been one of several Hadoop clusters on Ubuntu VMs
> (basically the same thing happens no matter which Hadoop installation I try
> to hit). So I'm guessing the problem is in my client configuration.
>
> This attempt to basically just connect to HDFS results in a bunch of error
> messages in the log file, which looks like it is trying to do user validation
> on the local machine instead of against the Hadoop (remote) cluster.
> Apr 11,2014 18:27:38.640 GMT T[AWT-EventQueue-0](26) DEBUG FileObjectManager:
> Trying to resolve file reference 'hdfs://hadoop-master:50070/'
> Apr 11,2014 18:27:38.953 GMT T[AWT-EventQueue-0](26) INFO
> org.apache.hadoop.conf.Configuration.deprecation: fs.default.name is
> deprecated. Instead, use fs.defaultFS
> Apr 11,2014 18:27:39.078 GMT T[AWT-EventQueue-0](26) DEBUG
> MutableMetricsFactory: field org.apache.hadoop.metrics2.lib.MutableRate
> org.apache.hadoop.security.UserGroupInformation$UgiMetrics.loginSuccess with
> annotation @org.apache.hadoop.metrics2.annotation.Metric(valueName=Time,
> value=[Rate of successful kerberos logins and latency (milliseconds)],
> about=, type=DEFAULT, always=false, sampleName=Ops)
> Apr 11,2014 18:27:39.094 GMT T[AWT-EventQueue-0](26) DEBUG
> MutableMetricsFactory: field org.apache.hadoop.metrics2.lib.MutableRate
> org.apache.hadoop.security.UserGroupInformation$UgiMetrics.loginFailure with
> annotation @org.apache.hadoop.metrics2.annotation.Metric(valueName=Time,
> value=[Rate of failed kerberos logins and latency (milliseconds)], about=,
> type=DEFAULT, always=false, sampleName=Ops)
> Apr 11,2014 18:27:39.094 GMT T[AWT-EventQueue-0](26) DEBUG
> MutableMetricsFactory: field org.apache.hadoop.metrics2.lib.MutableRate
> org.apache.hadoop.security.UserGroupInformation$UgiMetrics.getGroups with
> annotation @org.apache.hadoop.metrics2.annotation.Metric(valueName=Time,
> value=[GetGroups], about=, type=DEFAULT, always=false, sampleName=Ops)
> Apr 11,2014 18:27:39.094 GMT T[AWT-EventQueue-0](26) DEBUG MetricsSystemImpl:
> UgiMetrics, User and group related metrics
> Apr 11,2014 18:27:39.344 GMT T[AWT-EventQueue-0](26) DEBUG Groups: Creating
> new Groups object
> Apr 11,2014 18:27:39.344 GMT T[AWT-EventQueue-0](26) DEBUG NativeCodeLoader:
> Trying to load the custom-built native-hadoop library...
> Apr 11,2014 18:27:39.360 GMT T[AWT-EventQueue-0](26) DEBUG NativeCodeLoader:
> Failed to load native-hadoop with error: java.lang.UnsatisfiedLinkError: no
> hadoop in java.library.path
> Apr 11,2014 18:27:39.360 GMT T[AWT-EventQueue-0](26) DEBUG NativeCodeLoader:
> java.library.path=.... <bunch of stuff>
> Apr 11,2014 18:27:39.360 GMT T[AWT-EventQueue-0](26) WARN NativeCodeLoader:
> Unable to load native-hadoop library for your platform... using builtin-java
> classes where applicable
> Apr 11,2014 18:27:39.375 GMT T[AWT-EventQueue-0](26) DEBUG
> JniBasedUnixGroupsMappingWithFallback: Falling back to shell based
> Apr 11,2014 18:27:39.375 GMT T[AWT-EventQueue-0](26) DEBUG
> JniBasedUnixGroupsMappingWithFallback: Group mapping
> impl=org.apache.hadoop.security.ShellBasedUnixGroupsMapping
> Apr 11,2014 18:27:39.375 GMT T[AWT-EventQueue-0](26) ERROR Shell: Failed to
> detect a valid hadoop home directory: HADOOP_HOME or hadoop.home.dir are not
> set.
> java.io.IOException: HADOOP_HOME or hadoop.home.dir are not set.
> at org.apache.hadoop.util.Shell.checkHadoopHome(Shell.java:265)
> at org.apache.hadoop.util.Shell.<clinit>(Shell.java:290)
> 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.FileSystem$Cache$Key.<init>(FileSystem.java:2473)
> at org.apache.hadoop.fs.FileSystem$Cache$Key.<init>(FileSystem.java:2465)
> at org.apache.hadoop.fs.FileSystem$Cache.get(FileSystem.java:2331)
> at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:369)
> at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:168)
> at
> org.apache.commons.vfs2.provider.hdfs.HdfsFileSystem.resolveFile(HdfsFileSystem.java:115)
> at
> org.apache.commons.vfs2.provider.AbstractOriginatingFileProvider.findFile(AbstractOriginatingFileProvider.java:84)
> at
> org.apache.commons.vfs2.provider.AbstractOriginatingFileProvider.findFile(AbstractOriginatingFileProvider.java:64)
> at
> org.apache.commons.vfs2.impl.DefaultFileSystemManager.resolveFile(DefaultFileSystemManager.java:700)
> at
> org.apache.commons.vfs2.impl.DefaultFileSystemManager.resolveFile(DefaultFileSystemManager.java:656)
> at
> org.apache.commons.vfs2.impl.DefaultFileSystemManager.resolveFile(DefaultFileSystemManager.java:609)
>
> Apr 11,2014 18:27:39.391 GMT T[AWT-EventQueue-0](26) ERROR Shell: Failed to
> locate the winutils binary in the hadoop binary path: Could not locate
> executable null\bin\winutils.exe in the Hadoop binaries.
> java.io.IOException: Could not locate executable null\bin\winutils.exe in the
> Hadoop binaries.
>
> Apr 11,2014 18:27:39.391 GMT T[AWT-EventQueue-0](26) DEBUG Groups: Group
> mapping
> impl=org.apache.hadoop.security.JniBasedUnixGroupsMappingWithFallback;
> cacheTimeout=300000; warningDeltaMs=5000
> Apr 11,2014 18:27:39.469 GMT T[AWT-EventQueue-0](26) DEBUG
> UserGroupInformation: hadoop login
> Apr 11,2014 18:27:39.469 GMT T[AWT-EventQueue-0](26) DEBUG
> UserGroupInformation: hadoop login commit
> Apr 11,2014 18:27:39.751 GMT T[AWT-EventQueue-0](26) DEBUG
> UserGroupInformation: using local user:NTUserPrincipal: <user_name>
> Apr 11,2014 18:27:39.751 GMT T[AWT-EventQueue-0](26) DEBUG
> UserGroupInformation: UGI loginUser:whiro01 (auth:SIMPLE)
> Apr 11,2014 18:27:39.813 GMT T[AWT-EventQueue-0](26) ERROR HdfsFileSystem:
> Error connecting to filesystem hdfs://hadoop-master:50070/: No FileSystem for
> scheme: hdfs
> java.io.IOException: No FileSystem for scheme: hdfs
> at org.apache.hadoop.fs.FileSystem.getFileSystemClass(FileSystem.java:2304)
> at org.apache.hadoop.fs.FileSystem.createFileSystem(FileSystem.java:2311)
> at org.apache.hadoop.fs.FileSystem.access$200(FileSystem.java:90)
> at org.apache.hadoop.fs.FileSystem$Cache.getInternal(FileSystem.java:2350)
> at org.apache.hadoop.fs.FileSystem$Cache.get(FileSystem.java:2332)
> at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:369)
> at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:168)
> at
> org.apache.commons.vfs2.provider.hdfs.HdfsFileSystem.resolveFile(HdfsFileSystem.java:115)
> at
> org.apache.commons.vfs2.provider.AbstractOriginatingFileProvider.findFile(AbstractOriginatingFileProvider.java:84)
> at
> org.apache.commons.vfs2.provider.AbstractOriginatingFileProvider.findFile(AbstractOriginatingFileProvider.java:64)
> at
> org.apache.commons.vfs2.impl.DefaultFileSystemManager.resolveFile(DefaultFileSystemManager.java:700)
> at
> org.apache.commons.vfs2.impl.DefaultFileSystemManager.resolveFile(DefaultFileSystemManager.java:656)
> at
> org.apache.commons.vfs2.impl.DefaultFileSystemManager.resolveFile(DefaultFileSystemManager.java:609)
>
> So, my guess is that I don't have enough configuration setup on my client
> machine to tell Hadoop that the authentication is to be done at the remote
> end ....?? So, I'm trying to track down what the configuration info might be.
>
> Hoping to see if anyone here can see past the Commons VFS stuff that you
> probably don't understand to be able to tell me what other Hadoop/HDFS files
> / configuration I need to get this working.
>
> Note: I want to build a GUI component that can browse to arbitrary HDFS
> installations, so I can't really be setting up a hard-coded XML file for each
> potential Hadoop cluster I might connect to ....
>
> Thanks,
> ~Roger Whitcomb
>
