Installing and Running Hadoop and Spark on Windows
We recently got a big new server at work to run Hadoop and Spark (H/S) on for a proof-of-concept test of some software we're writing for the biopharmaceutical industry and I hit a few snags while trying to get H/S up and running on Windows Server 2016 / Windows 10. I've documented here, step-by-step, how I managed to install and run this pair of Apache products directly in the Windows cmd prompt, without any need for Linux emulation.
Update 16 Dec 2019: Software version numbers have been updated and the text has been clarified.
Get the Software
The first step is to download Java, Hadoop, and Spark. Spark seems to have trouble working with newer versions of Java, so I'm sticking with Java 8 for now:
I can't guarantee that this guide works with newer versions of Java. Please try with Java 8 if you're having issues. Also, with the new Oracle licensing structure (2019+), you may need to create an Oracle account to download Java 8. To avoid this, simply download from AdoptOpenJDK instead.
For Java, I download the "Windows x64" version of the AdoptOpenJDK HotSpot JVM (jdk8u232-b09); for Hadoop, the binary of v3.1.3 (hadoop-3.1.3.tar.gz); for Spark, v3.0.0 "Pre-built for Apache Hadoop 2.7 and later" (spark-3.0.0-preview-bin-hadoop2.7.tgz). From this point on, I'll refer generally to these versions as hadoop-<version> and spark-<version>; please replace these with your version number throughout the rest of this tutorial.
Even though newer versions of Hadoop and Spark are currently available, there is a bug with Hadoop 3.2.1 on Windows that causes installation to fail. Until that patched version is available (3.3.0 or 3.1.4 or 3.2.2), you must use an earlier version of Hadoop on Windows.
Next, download 7-Zip to extract the *gz archives. Note that you may need to extract twice (once to move from *gz to *.tar files, then a second time to "untar"). Once they're extracted (Hadoop takes a while), you can delete all of the *.tar and *gz files. You should now have two directories and the JDK installer in your Downloads directory:
Note that -- as shown above -- the "Hadoop" directory and "Spark" directory each contain a LICENSE, NOTICE, and README file. With particular versions of Hadoop, you may extract and get a directory structure like
C:\Users\<username>\Downloads\hadoop-<version>\hadoop-<version>\...
...if this is the case, move the contents of the inner hadoop-<version> directory to the outer hadoop-<version> directory by copying-and-pasting, then delete the inner hadoop-<version> directory. The path to the LICENSE file, for example, should then be:
C:\Users\<username>\Downloads\hadoop-<version>\LICENSE
...and similar for the "Spark" directory.
WARNING: If you see a message like "Can not create symbolic link : A required privilege is not held by the client" in 7-Zip, you MUST run 7-Zip in Administrator Mode, then unzip the directories. If you skip these files, you may end up with a broken Hadoop installation.
Move the Spark and Hadoop directories into the C:\ directory (you may need administrator privileges on your machine to do this). Then, run the Java installer but change the destination folder from the default C:\Program Files\AdoptOpenJDK\jdk-<version>\ to just C:\Java. (H/S can have trouble with directories with spaces in their names.)
Once the installation is finished, you can delete the Java *.msi installer. Make two new directories called C:\Hadoop and C:\Spark and copy the hadoop-<version> and spark-<version> directories into those directories, respectively:
If you get "name too long"-type warnings, skip those files. These are only *.html files and aren't critical to running H/S.
Set Up Your Environment Variables
Next, we need to set some environment variables. Go to Control Panel > System and Security > System > Advanced System Settings > Environment Variables...:
...and add new System variables (bottom box) called:
-
JAVA_HOME-->C:\Java -
HADOOP_HOME-->C:\Hadoop\hadoop-<version> -
SPARK_HOME-->C:\Spark\spark-<version>
(Adjust according to the versions of Hadoop and Spark that you've downloaded.)
Then, edit the Path (again, in the System variables box at the bottom) and add those variables with \bin appended (also \sbin for Hadoop):
If you echo %PATH% in cmd you should now see these three directories somewhere in the middle of the path, because the User Path is appended to the System Path for the %PATH variable. You should check now that java -version, hdfs -version, and spark-shell --version return version numbers, as shown below. This means that they were correctly installed and added to your %PATH%:
Please note that if you try to run the above commands from a location with any spaces in the path, the commands may fail. For example, if your username is "Firstname Lastname" and you try to check the Hadoop version, you may see an error message like:
C:\Users\Firstname Lastname>hdfs -version
Error: Could not find or load main class Lastname
To fix this, simply move to a working directory without any spaces in the path (as I did in the screenshot above):
C:\Users\Firstname Lastname>cd ..
C:\Users>hdfs -version
openjdk version "1.8.0_232"
OpenJDK Runtime Environment (AdoptOpenJDK)(build 1.8.0_232-b09)
OpenJDK 64-Bit Server VM (AdoptOpenJDK)(build 25.232-b09, mixed mode)
Configure Hadoop
Next, go to %HADOOP_HOME%\etc\hadoop and edit (or create) the file core-site.xml so it looks like the following:
core-site.xml
<?xml version="1.0" encoding="UTF-8"?>
<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>
<configuration>
<property>
<name>fs.defaultFS</name>
<value>hdfs://localhost:9000</value>
</property>
</configuration>
In the same directory, edit (or create) mapred-site.xml with the following contents:
mapred-site.xml
<?xml version="1.0" encoding="UTF-8"?>
<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>
<configuration>
<property>
<name>mapreduce.framework.name</name>
<value>yarn</value>
</property>
</configuration>
Next, edit (or create) hdfs-site.xml:
hdfs-site.xml
<?xml version="1.0" encoding="UTF-8"?>
<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>
<configuration>
<property>
<name>dfs.replication</name>
<value>1</value>
</property>
<property>
<name>dfs.namenode.name.dir</name>
<value>file:///C:/Hadoop/hadoop-<version>/namenode</value>
</property>
<property>
<name>dfs.datanode.data.dir</name>
<value>file:///C:/Hadoop/hadoop-<version>/datanode</value>
</property>
</configuration>
...yes, they should be forward slashes, even though Windows uses backslashes. This is due to the way that Hadoop interprets these file paths. Also, be sure to replace <version> with the appropriate Hadoop version number. Finally, edit yarn-site.xml so it reads:
yarn-site.xml
<?xml version="1.0" encoding="UTF-8"?>
<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>
<configuration>
<property>
<name>yarn.nodemanager.aux-services</name>
<value>mapreduce_shuffle</value>
</property>
<property>
<name>yarn.nodemanager.auxservices.mapreduce.shuffle.class</name>
<value>org.apache.hadoop.mapred.ShuffleHandler</value>
</property>
</configuration>
The last thing we need to do is create the directories that we referenced in hdfs-site.xml:
Patch Hadoop
Now, you need to apply a patch created by and posted to GitHub by user cdarlint. (Note that this patch is specific to the version of Hadoop that you're installing, but if the exact version isn't available, try to use the one just before the desired version... that works sometimes.)
Make a backup of your %HADOOP_HOME%\bin directory (copy it to \bin.old or similar), then copy the patched files (specific to your Hadoop version, downloaded from the above git repo) to the old %HADOOP_HOME%\bin directory, replacing the old files with the new ones.
Now, if you run hdfs namenode -format in cmd, you should see:
One more thing to do: copy hadoop-yarn-server-timelineservice-<version> from C:\Hadoop\hadoop-<version>\share\hadoop\yarn\timelineservice to C:\Hadoop\hadoop-<version>\share\hadoop\yarn (the parent directory). (These are short version numbers, like 3.1.3, and may not match between the JAR file name and the directory name.)
Boot HDFS
Finally, you can boot HDFS by running start-dfs.cmd and start-yarn.cmd in cmd:
You should verify that the namenode, datanode, resourcemanager, and nodemanager are all running using the jps command:
You can also open localhost:8088 and localhost:9870 in your browser to monitor your shiny, new Hadoop Distributed File System:
Finally, test that you can edit the filesystem by running hadoop fs -mkdir /test, which will make a directory called test in the root directory:
Testing Hadoop and Spark
We know now how to create directories (fs -mkdir) and list their contents (fs -ls) in HDFS, what about creating and editing files? Well, files can be copied from the local file system to HDFS with fs -put. We can then read files in the spark-shell with sc.textFile(...):
Note that you read a file from HDFS on hdfs://localhost:9000/ and not just hdfs://. This is because this is the defaultFS we defined in core-site.xml.
If you want to stop the HDFS, you can run the commands:
C:\Users> stop-dfs.cmd
and
C:\Users> stop-yarn.cmd
So there you have it! Spark running on Windows, reading files stored in HDFS. This took a bit of work to get going and I owe a lot to people who previously encountered the same bugs as me, or previously wrote tutorials which I used as a framework for this walkthrough. Here are the blogs, GitHub repos, and SO posts I used to build this tutorial:
- Muhammad Bilal Yar's Hadoop 2.8.0 walkthrough
- java.net.URISyntaxException
- java.lang.UnsatisfiedLinkError
- FATAL resourcemanager.ResourceManager
- localhost:50070 error
- Kuldeep Singh's walkthrough and troubleshooting guide
- Jacek Laskowski's GitBook
- java.io.IOException: Incompatible clusterIDs
- HDFS basic commands
- Spark basic commands
Top comments (60)
Hi Andrew,
I am getting this error when i try to execute start-yarn.cmd:
This file does not have an app associated with it for performing this action. Please install an app or, if one is already installed, create an association in the defaul apps settings page.
It seems like yarn is not a command known by windows.
Here is my environment variables:
thepracticaldev.s3.amazonaws.com/i...
Hi David,
It sounds like you're trying to run this program by double-clicking on it. You should run it in the
cmdprompt like:Let me know if that works for you.
No. I am using the cmd console.
For example if i try to type just hadoop in console, it shows me some options. But if i try to type yarn it says:
'yarn' is not recognized as an internal or external command,
operable program or batch file.
I am attaching the images where it can be seen: thepracticaldev.s3.amazonaws.com/i...
These error messages are giving you hints about what's going wrong. It looks like your
%PATH%is set up correctly andhadoopis on it, but you can't run thehadoopcommand by itself. That's what the error message is telling you. You need to include additional command-line arguments.Try running
hadoop versionand see if you get any output.When i execute this command "hadoop version" i get this:
Hadoop 2.9.1
Subversion github.com/apache/hadoop.git -r e30710aea4e6e55e69372929106cf119af06fd0e
Compiled by root on 2018-04-16T09:33Z
Compiled with protoc 2.5.0
From source with checksum 7d6d2b655115c6cc336d662cc2b919bd
This command was run using /C:/BigData/hadoop-2.9.1/share/hadoop/common/hadoop-common-2.9.1.jar
But if i try execute just "yarn" i get:
'yarn' is not recognized as an internal or external command,
operable program or batch file.
Right, so
hadoopis working fine.yarnisn't a command that you run, it's just the resource negotiator that the HDFS (Hadoop Distributed File System) uses behind the scenes to manage everything.If you successfully ran
start-yarn.cmdandstart-dfs.cmd, you're good to go! Try uploading a file to HDFS with:...and checking that it's been uploaded with
Hi,
Thanks for your answer.
But the problem is exactly that. When a i run the command start-yarn.cmd i get:
This file does not have an app associated with it for performing this action. Please install an app or, if one is already installed, create an association in the defaul apps settings page.
So, i tried to see what the content is for the file start-yarn.cmd and it has a call to yarn command. So i tried to call it in a independent console and i get the same error. That is the reason why i think the problem is yarn, the command as is.
Okay, I think we're getting close. Can you
echo %PATH%and share the result?start-yarn.cmdshould be within the Hadoop/sbindirectory. If you haven't added it to your path correctly, maybe that's why you can't access it.Thanks for the answer.
Here it is: echo %path%
Result:
C:\Program Files (x86)\Common Files\Oracle\Java\javapath;C:\ProgramData\Oracle\Java\javapath;E:\app\dserranoa\product\11.2.0\client_1;E:\app\dserranoa\product\11.2.0\client_1\bin;C:\oraclexe\app\oracle\product\11.2.0\server\bin;;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1.0\;C:\Program Files\TortoiseGit\bin;C:\Program Files\PuTTY\;C:\Program Files\Microsoft SQL Server\130\Tools\Binn\;C:\Program Files\Microsoft\Web Platform Installer\;C:\Program Files (x86)\Microsoft SDKs\Azure\CLI\wbin;C:\Program Files (x86)\Microsoft SQL Server\110\DTS\Binn\;C:\Program Files (x86)\Microsoft SQL Server\120\DTS\Binn\;C:\Program Files (x86)\Microsoft SQL Server\130\DTS\Binn\;C:\Program Files\Microsoft SQL Server\110\Tools\Binn\;C:\Program Files (x86)\Microsoft SQL Server\110\Tools\Binn\ManagementStudio\;C:\Program Files (x86)\Microsoft SQL Server\110\Tools\Binn\;C:\Program Files\nodejs\;C:\Program Files\Microsoft SQL Server\110\DTS\Binn\;C:\Program Files (x86)\Microsoft Visual Studio 10.0\Common7\IDE\PrivateAssemblies\;C:\Program Files (x86)\Bitvise SSH Client;C:\Program Files\dotnet\;C:\Program Files\Microsoft Service Fabric\bin\Fabric\Fabric.Code;C:\Program Files\Microsoft SDKs\Service Fabric\Tools\ServiceFabricLocalClusterManager;C:\Program Files (x86)\Brackets\command;C:\WINDOWS\System32\OpenSSH\;C:\Program Files\Microsoft SQL Server\Client SDK\ODBC\130\Tools\Binn\;C:\Program Files (x86)\Microsoft SQL Server\140\Tools\Binn\;C:\Program Files\Microsoft SQL Server\140\Tools\Binn\;C:\Program Files\Microsoft SQL Server\140\DTS\Binn\;C:\Program Files (x86)\Microsoft SQL Server\140\DTS\Binn\;C:\Program Files (x86)\Microsoft SQL Server\150\DTS\Binn\;C:\Program Files\Java\jdk1.8.0_121\bin;C:\Program Files\MySQL\MySQL Shell 8.0\bin;C:\Users\dserranoa\AppData\Local\Microsoft\WindowsApps;C:\Progra~1\Java\jdk1.8.0_121;C:\BigData\hadoop-2.9.1;C:\BigData\hadoop-2.9.1\bin;C:\BigData\hadoop-2.9.1\sbin
I have attached the image of my environment variables.
Huh. Can you run:
...and give the result?
Sure,
Here it is:
Volume in drive C has no label.
Volume Serial Number is 8276-D962
Directory of C:\BigData\hadoop-2.9.1\sbin
11/09/2019 09:55 a.m.
.11/09/2019 09:55 a.m. ..
16/04/2018 06:52 a.m. 2.752 distribute-exclude.sh
11/09/2019 09:55 a.m. FederationStateStore
16/04/2018 06:52 a.m. 6.475 hadoop-daemon.sh
16/04/2018 06:52 a.m. 1.360 hadoop-daemons.sh
16/04/2018 06:52 a.m. 1.640 hdfs-config.cmd
16/04/2018 06:52 a.m. 1.427 hdfs-config.sh
16/04/2018 06:52 a.m. 3.148 httpfs.sh
16/04/2018 06:52 a.m. 3.677 kms.sh
16/04/2018 06:52 a.m. 4.134 mr-jobhistory-daemon.sh
16/04/2018 06:52 a.m. 1.648 refresh-namenodes.sh
16/04/2018 06:52 a.m. 2.145 slaves.sh
16/04/2018 06:52 a.m. 1.779 start-all.cmd
16/04/2018 06:52 a.m. 1.471 start-all.sh
16/04/2018 06:52 a.m. 1.128 start-balancer.sh
16/04/2018 06:52 a.m. 1.401 start-dfs.cmd
16/04/2018 06:52 a.m. 3.734 start-dfs.sh
16/04/2018 06:52 a.m. 1.357 start-secure-dns.sh
16/04/2018 06:52 a.m. 1.571 start-yarn.cmd
16/04/2018 06:52 a.m. 1.347 start-yarn.sh
16/04/2018 06:52 a.m. 1.770 stop-all.cmd
16/04/2018 06:52 a.m. 1.462 stop-all.sh
16/04/2018 06:52 a.m. 1.179 stop-balancer.sh
16/04/2018 06:52 a.m. 1.455 stop-dfs.cmd
16/04/2018 06:52 a.m. 3.206 stop-dfs.sh
16/04/2018 06:52 a.m. 1.340 stop-secure-dns.sh
16/04/2018 06:52 a.m. 1.642 stop-yarn.cmd
16/04/2018 06:52 a.m. 1.340 stop-yarn.sh
16/04/2018 06:52 a.m. 4.295 yarn-daemon.sh
16/04/2018 06:52 a.m. 1.353 yarn-daemons.sh
28 File(s) 61.236 bytes
3 Dir(s) 101.757.034.496 bytes free
So
start-dfs.cmdworks, butstart-yarn.cmddoesn't? Weird. They're both in the same directory. That doesn't make much sense.I'm not sure how I can help further without being at your terminal. I'd say maybe try starting from scratch? Sometimes, it's easy to miss a small step or two.
mmm well, i tried to do the same process in another machine and it happened again. The same error. The yarn daemons are not running.
I have checked different options but i have not could find any solution yet.
I don't know if yarn needs some additional installation or something like that or if there is another environment variable that i am not setting up.
I am really lost here.
What kind of command would you use in my console?
I would start from scratch, and make sure the correct version (8) of Java is installed, and re-install Hadoop. Then, I would double-check all of the environment variables.
Can you try adding the environment variables as system environment variables, rather than user environment variables? You may need to be an Administrator to do this.
If all of that checks out, and the
%PATH%is correct, and all of the.cmdfiles are on the path, I'm not sure what else I would do. There's no reason why those commands shouldn't work if they're on the%PATH%.I appreciate your help.
I have already added the variables to the system but the problem is still there.
I would really appreciate that you tell me If you have another ideas to solve this issue.
I think it is also weird but it seems something related to yarn. I will look for more info , more tricks and if i solve it i will post here.
Thanks so much.
Hi Andrew ,
It is me again. Now i am testing in my personal machine. But now i ma having another problem. In my local machine my user is "David Serrano". As you can see it has one space in it. When i try to format the namenode with "hdfs namenode -format" I am getting this error:
Error: Could not find or load main class Serrano
Caused by: java.lang.ClassNotFoundException: Serrano
So, i guess the problem is the space in my user name. What can i do in this case?
Thanks in advance!
Hadoop doesn't like spaces in paths. I think the only thing you can do is put Java, Hadoop, and Spark in locations where there are no spaces in the path. I usually use:
Hi,
Well all the files are in paths without spaces. However, hadoop is executing something using my user "David Serrano" and it is generating the problem. I have not found the root cause of this.
Are there any spaces on your
%PATH%at all?Hi,
Here it is my path:
C:\Users\David Serrano>echo %path%
C:\Program Files (x86)\Common Files\Oracle\Java\javapath;C:\Program Files\Microsoft MPI\Bin\;C:\Program Files (x86)\Intel\iCLS Client\;C:\Program Files\Intel\iCLS Client\;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1.0\;C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\DAL;C:\Program Files\Intel\Intel(R) Management Engine Components\DAL;C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\IPT;C:\Program Files\Intel\Intel(R) Management Engine Components\IPT;C:\Program Files\dotnet\;C:\Program Files\Microsoft SQL Server\130\Tools\Binn\;C:\Program Files (x86)\Microsoft SQL Server\Client SDK\ODBC\130\Tools\Binn\;C:\Program Files (x86)\Microsoft SQL Server\140\Tools\Binn\;C:\Program Files (x86)\Microsoft SQL Server\140\DTS\Binn\;C:\Program Files (x86)\Microsoft SQL Server\140\Tools\Binn\ManagementStudio\;C:\WINDOWS\System32\OpenSSH\;C:\Program Files\Git\cmd;C:\Program Files\Microsoft SQL Server\Client SDK\ODBC\130\Tools\Binn\;C:\Program Files\Microsoft SQL Server\140\Tools\Binn\;C:\Program Files\Microsoft SQL Server\140\DTS\Binn\;C:\Program Files\Java\jdk-12.0.1\bin;C:\Program Files\MySQL\MySQL Shell 8.0\bin\;C:\Progra~1\Java\jdk-12.0.1;C:\BigData\hadoop-3.1.2;C:\BigData\hadoop-3.1.2\bin;C:\BigData\hadoop-3.1.2\sbin;
As you can see, there are a lot of spaces, however, in the cofngiuration f the variables i am using--> C:\Progr~1 ... in order to avoid spaces problems. But, the problem is with my user "David Serrano". The error says:
Error: Could not find or load main class Serrano
Caused by: java.lang.ClassNotFoundException: Serrano
As you can see in the PATH there is not "Serrano" word. so, my conclusion is that the problem is in my user. But i don't know how i can to avoid this.
Maybe it's doing something with your working directory path? Try
cd-ing toC:\first, then running Hadoop. I'm really not sure, though.I already did that:
C:>hadoop version
Error: Could not find or load main class Serrano
Caused by: java.lang.ClassNotFoundException: Serrano
Do you know which script of hadoop call the user profile? do you know if hadoop has some way to set up the name of the user profile in the scripts?
I don't, sorry, David. I'm not sure why that should be hard-coded anywhere, if it's not in your
%PATH%and you're not in that directory.Well, here are some info (although it is a little bit old) that could give some clue about the problem:
blog.benhall.me.uk/2011/01/install...
I think i can do something similar to the advice in the above blog. However i need to know which is the variable that hadoop is using to call java in order to change it in the config files.
If you have some info about it, please post here in order to try to solve the problem.
Thanks in advance.
Hadoop uses
JAVA_HOMEto determine where your Java distribution is installed. In a Linux installation, there's a file calledhadoop/etc/hadoop/hadoop-env.sh. It might be.cmdinstead of.shon Windows, but I'm not sure.Check out my other article on installing Hadoop on Linux. (Search for "JAVA_HOME" to find the relevant bit.)
Yes, the JAVA_HOME variable is fine in my laptop. However, hadoop must use in another part of its code the variable %USERNAME% or %USERPROFILE%. Those variables are the problematic thing. I need to locate that part in hadoop and try to change in some config file (if it is possible). Actually i have another machine with ubuntu and hadoop works normally. The idea was installing on windows to do some specific work in both systems.
I appreciate your attention, and if you get some new info about this kind of problems (user name with spaces and yarn problems in windows) please don't hesitate in posting it here.
thanks a lot.
Hey Guys, I am also the same problem in my system due to space in my system user name >Did You find any Solution
thanx in advance
Thanks for putting this together and sharing knowledge. I tried to get Hadoop up and running on my Windows machine last year, and it was painful! Anywho, it encouraged me to put together a blog just like you - exitcondition.com/install-hadoop-w...
Keep Exploring!
hi Andrew
when I run start-dfs.cmd and start-yarn.cmd command it gives me an error
C:\Java\jdk1.8.0_201\bin\java -Xmx32m -classpath "C:\Hadoop\hadoop-3.1.2\etc\hadoop;C:\Hadoop\hadoop-3.1.2\share\hadoop\common;C:\Hadoop\hadoop-3.1.2\share\hadoop\common\lib*;C:\Hadoop\hadoop-3.1.2\share\hadoop\common*" org.apache.hadoop.util.PlatformName' is not recognized as an internal or external command,
operable program or batch file.
The system cannot find the file C:\Windows\system32\cmd.exe\bin.
The system cannot find the file C:\Windows\system32\cmd.exe\bin.
Please help me
Hi پنوں,
It looks like your system variables are mis-configured. The path
Doesn't make any sense, as
cmd.exeis an executable, not a directory. Double-check that you have the environment variables set correctly and let me know if you continue to have issues.There was a problem with environment variables I was trying C:\Windows\system32\cmd.exe\bin but that was prompting an error. but when I changed the system variable with C:\Windows\system32\cmd.exe it was Running fine.
Thank you BOSS for your help Stay blessed.
Happy to help!
Just signed to thank you for this tutorial. Well explained and very clear. Also, thanks for the link to the patch for bin files. I was only able to work with older versions of hadoop and almost tempted to try to build the bins on my own. Cheers!
Thank you so much, after 4 tutorials and 3 days of trying it finally worked! Yay!!!
For those who might have the same problem as I did: When I used start-dfs.cmd and start-yarn.cmd it said the command couldn't be found. After a quick internet search I figured out that I needed to go to the sbin directory because it's in there and start it from there. Worked fine then.
Glad it worked! I actually went back to follow this guide again recently and skipped over the part where I say to add
\sbinto thePATH, too. No worries!Thanks Andrew for this tutorial, it was very helpful.
How does one address this encryption error:
INFO sasl.SaslDataTransferClient: SASL encryption trust check: localHostTrusted = false, remoteHostTrusted = falseI get it after I hadoop put a file.
Hi Chinanu. I haven't encountered an error like this before, so unfortunately your guess is as good as mine. This site seems to suggest that it might be an issue with missing
jarfiles? I'm not sure.Hi I am following a similar tutorial(joe0.com/2017/02/02/how-to-install...)
earlier when I run the start-dfs.cmd command the hadoop clusters came up with no issues, but after I installed flume, scoop, pig(by following the official websites) now when I entered start-dfs.cmd I am getting below:
Can you please help me solve it
C:\hadoop\hadoop-3.1.2\sbin>start-dfs.cmd
The system cannot find the file hadoop.
The system cannot find the file hadoop.
But ... why? Just get Fedora and done ;)
Client-specified software that only runs on Windows Server :/
Well, that's sad. Have you thought about using smth. like an IIS container for those proprietary blobs?
I haven't, no... how would that work? Can you point me to any good resources?
See the Docker hub for more info, although I don't use it personally (I use & write FLOSS exclusivly)
Hello Andrew,
Thank you so much for your tutorial. I just have some questions hope you can help:
after running start-dfs.cmd and start-yarn.cmd in cmd (boot HDFS step) I noticed that the yarn is working fine but NameNode and DataNode started for a few secs and then both stopped working for some reasons. Any idea what might cause this issue?
during the setting path process, I couldn't run the command: hdfs -version (I cd out to C:/User but I still have the same error Error: Could not find or load main class Last Name) so I edit /etc/hadoop/hadoop-env.cmd and change this line:
set HADOOP_IDENT_STRING=%USERNAME%
to
set HADOOP_IDENT_STRING=myuser
This allows me to do hdfs -version but I don't know this change will affect anything or not could you please clarify? Is this change make my NameNode and DataNode not working