I need to connect to a unix system having Hadoop 2.0.0 database using Eclipse Juno on a Windows system.I tried adding an eclipse plug-in for an older version of Hadoop but when I add Map-Reduce Location, I get the following error :
server ipc version 7 cannot communicate with client version 3 in eclipse
As per some blog results through google, the version mismatch is causing the issue.
Can anyone help?
Please help me find the correct plugin or lead me to where I am going wrong.
Unless I add this plug-in I would not be able to coonect to the database..is there any workaround?
Thanks,
Hitz
Couple of things, Hadoop is not a database, it's an opensource framework for distributed computing. You can directly run MapReduce programs on Hadoop with out an eclipse plugin. Simply package the classes in to a Jar, copy the jar to the unix system and use the below command to run the jar.
hadoop jar <Jar Name> <Name of Main Class> <Input Dir> <Output Dir>
If the version of eclipse you have is not compatible with the version of Hadoop or your eclipse. Check the Link to build your plugin.
Related
I wrote some programs for Oracle Service Instances using the SDK in Eclipse.I also included some Referenced Libraries in Eclipse Project.
Now I want to run those programs from that Eclipse Java Project on to differnt OS(Ubuntu-Server).
How can I do that? Help me doing this!
This question seems to be about how to run java code on Ubuntu, and is not specific to any Oracle SDKs.
In general, you should package the application as a jar in Eclipse, then move that jar to the Ubuntu server. Then run that jar from the command line on the Ubuntu server. For more info see this post.
This is a problem that I am facing with Jboss fuse, where a dependency (Oracle JDBC JAR) is not found as an OSGI bundle.
The source code works fine when run locally, but errors out when deployed on a Karaf container.
A detailed explanation of the issue and associated source code is placed at:
https://developer.jboss.org/message/948643
Any suggestions on this would be welcome.
Thanks for your patience.
Prabal
The Oracle JAR File that you are trying to deploying on the Fuse Server is not a Maven Bundle.
So you'll need to Wrap and install the library using the following command :
install -s wrap:mvn:com.oracle/ojdbc6/<version>
Where the <version> refers to the version number of the jar file. Hope this helps.
I was previously using hadoop 1.2.1 in one of my netbeans project. I did this by including the various jar files in the 1.2.1 distribution I downloaded from hadoop's website.
I was wondering, is a similar approach with hadoop 2.2.0 possible? Namely, can I just include a bunch of jar files in my netbeans project and plug into hadoop that way?
Thanks in advance!
You can - There are more jars in the 2.x distributions of hadoop but the same principle should work.
On a side note, you may also want to look into using Maven for dependency management that will manage the list of included jars in Netbeans for you.
I'm new to Hadoop. Can anyone tell me how to create Hadoop Plugin (version 1.0.3) for eclipse? In fact, they removed the plugin from /hadoop-x.x.x/contrib/ (in my case, x.x.x = 1.0.3)
There's a eclipse-plugin in /hadoop-x.x.x/src/contrib/.
By the way, What's the "typical way" to develop a MapReduce app using eclipse (words count for example) in term of:
Configuration (Standalone or Pseudodistributed...)
Coding convention (Folder structure, code, debug...)
when you have Hadoop Eclipse plugin installed and configured
in eclipse create a mapreduce project, it provides required dependencies of hadoop and other jars.
then you need to create Main class, Mapper class and Reducer class, In Main class you need to configure Job. wordcount example
once done you can run main program as run on hadoop, no need to start hadoop before running the program
for 1.0.3 plugin:
Apache has remove the plugin from Hadoop installation folder. Instead you can find Eclipse Plugin source code with build.xml file at "${HADOOP_HOME}\hadoop-1.0.3\src\contrib\eclipse-plugin". or you can simply download it from here
When I try to connect to MapReduce location which is cluster with one namenode and datanode from my laptop (where I have my eclipse and mapreduce plugin) I get the Error: Server IPC version 7 cannot cannot communicate with client version 3. I tried to find some information on google but could not find much. Is it because my mapreduce eclipse plugin using older version IPC and the hadoop cluster has newer one. So its just that I'm using outdated plugin? How do I find which IPC version my eclipse plugin is using? Any ideas?
Yes this sounds like version incompatibility. Assuming your hadoop distro has the source, you can recompile the eclipse plugin for that version.
See the:
$HADOOP_HOME/src/contrib/eclipse-plugin folder
http://wiki.apache.org/hadoop/EclipsePlugIn - final section on how to build the plugin