hadoop-plugins

I have very little knowledge of pig. I have protobuf format data file. I need to load this file into a pig script. I need to write a LoadFunc UDF to load it. say function is Protobufloader() . my PIG script would be A = LOAD 'abc_protobuf.dat' USING Protobufloader() as (name, phonenumber, email); All i wish to know is How do i get the file input stream. Once i get hold of file input stream, i can parse the data from protobuf format to PIG tuple format. PS: thanks in advance Twitter's open source library elephant bird has many such loaders: https://github.com/kevinweil/elephant-bird You can use

As I am following below procedure: http://www.codeproject.com/Articles/757934/Apache-Hadoop-for-Windows-Platform https://www.youtube.com/watch?v=VhxWig96dME . While executing the command c :/hadoop-2.3.0/bin/hadoop namenode -format , I got the error message given below **DEPRECATED:Use of this script to execute hdfs command is deprecated. Instead use the hdfs command for it. Exception in thread "main" java.lang.NoClassDefFountError** I am using jdk-6-windows-amd64.exe . How to solve this issue ? use the cmd c:/hadoop-2.3.0/bin/hdfs to replace c:/hadoop-2.3.0/bin/hadoop A lot of hdfs cmds are

I want to share large in memory static data(RAM lucene index) for my map tasks in Hadoop? Is there way for several map/reduce tasks to share same JVM? Jobs can enable task JVMs to be reused by specifying the job configuration mapred.job.reuse.jvm.num.tasks. If the value is 1 (the default), then JVMs are not reused (i.e. 1 task per JVM). If it is -1, there is no limit to the number of tasks a JVM can run (of the same job). One can also specify some value greater than 1 using the api. In $HADOOP_HOME/conf/mapred-site.xml add the follow property <property> <name>mapred.job.reuse.jvm.num.tasks<

I am trying to process XML files from hadoop, i got following error on invoking word-count job on XML files . 13/07/25 12:39:57 INFO mapred.JobClient: Task Id : attempt_201307251234_0001_m_000008_0, Status : FAILED Too many fetch-failures 13/07/25 12:39:58 INFO mapred.JobClient: map 99% reduce 0% 13/07/25 12:39:59 INFO mapred.JobClient: map 100% reduce 0% 13/07/25 12:40:56 INFO mapred.JobClient: Task Id : attempt_201307251234_0001_m_000009_0, Status : FAILED Too many fetch-failures 13/07/25 12:40:58 INFO mapred.JobClient: map 99% reduce 0% 13/07/25 12:40:59 INFO mapred.JobClient: map 100%

I want to read the PDF file using hadoop, how it is possible? I only know that hadoop can process only txt files, so is there anyway to parse the PDF files to txt. Give me some suggestion. An easy way would be to create a SequenceFile to contain the PDF files. SequenceFile is a binary file format. You could make each record in the SequenceFile a PDF. To do this you would create a class derived from Writable which would contain the PDF and any metadata that you needed. Then you could use any java PDF library such as PDFBox to manipulate the PDFs. Processing PDF files in Hadoop can be done by

I am in scenario where I have two mapreduce jobs. I am more comfortable with python and planning to use it for writing mapreduce scripts and use hadoop streaming for the same. is there a convenient to chain both the jobs following form when hadoop streaming is used? Map1 -> Reduce1 -> Map2 -> Reduce2 I've heard a lot of methods to accomplish this in java, But i need something for Hadoop streaming. Here is a great blog post on how to use Cascading and Streaming. http://www.xcombinator.com/2009/11/18/how-to-use-cascading-with-hadoop-streaming/ The value here is you can mix java (Cascading query