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.
Related
When the apache beam will be released?
Will it has feature to connect with oracle RDBMS to do ETL in its first release?
Apache Beam has had two incubating releases so far, with the third currently underway. We release the source code to dist.apache.org and binary jars to Maven Central Repository.
We don't release an all-inclusive bundled jar. Instead, we recommend using a tool like Maven (mvn), or m2e plugin in Eclipse, or native support in IntelliJ to make all dependencies automatically managed for you.
The third release should include the JdbcIO API, which presumably should work well with Oracle RDBMS.
I am new to Spark. I am trying to run a simple spark project in local system.
So based on tutorials I have run 'sbt/sbt assembly'. Now jar file is created in core/target/scala-2.9.2/spark-core-assembly-0.7.0.jar. To run samples could you please tell where and how I have to add this jar to classpath?
Regards,
Dinesh
The Spark documentation's quick start guide has documentation on developing standalone applications using Spark with Scala and Java. Those instructions show how to add a Spark dependency to your Maven or SBT projects.
If you're not using Maven or SBT to build your project, you'll have to pass the appropriate flags to javac and java to add the Spark assembly JAR to your classpath, the same as you'd do for any other JAR dependency.
As an aside, 0.7.0 is a pretty old version of Spark (it was released almost a year ago); I'd recommend using a newer version, such as 0.9.0.
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.
I have a custom classloader jar <scope>provided</scope> that must be in tomcat/lib before my webapp is run or else it fails to start. I'm using WTP. Is there some way that I can configure M2E/WTP to automatically copy this custom jar to tomcat/lib during the deploy process?
Edit:
It doesn't have to be using WTP, I could also use, for example, a solution using tomcat6-maven-plugin.
For running an embedded Tomcat instance with the Tomcat Maven plugin, add the JARs required in the Tomcat lib dir as dependencies of the Tomcat plugin itself as shown in this example with the derby and javamail dependencies.
I spent a lot of time researching this problem and here's what I've found:
The tomcat6-maven-plugin does not properly emulate the tomcat boot order, as seen in this jira issue as well as their tomcat6-maven-plugin source.
However, after more research I discovered another maven plugin that I didn't know existed: cargo. Thanks to their excellent documentation I was able to get my project running with the custom (and picky) class loader jar.
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