TaskProcess exit with a non-zero status of 126

Hi, While running a mapreduce task, i get a weird exception, taskProcess exit with a non zero status of 126. I tried hunting for the same online, coudnt find any lead. any pointers? Regards, Raakhi

Re: Unexpected termination of a job

tion. > > - Aaron > > On Wed, Mar 3, 2010 at 4:13 AM, Rakhi Khatwani > wrote: > > > Hi, > >I am running a job which has lotta preprocessing involved. so whn > i > > run my class from a jarfile, somehow it terminates after sometime without > > gi

Unexpected termination of a job

Hi, I am running a job which has lotta preprocessing involved. so whn i run my class from a jarfile, somehow it terminates after sometime without giving any exception, i have tried running the same program several times, and everytime it terminates at different locations in the code(during

Want to create custom inputformat to read from solr

Hi, Has anyone tried creating customInputFormat which reads from solrIndex for processing using mapreduce??? is it possible doin tht?? and how? Regards, Raakhi

Using custom Input Format

Hi, i have been trying to implement custom input and output formats. i was successful enough in creating an custom output format. but whn i call a mapreduce method which takes in a file, using custom input format, i get an exception. java.lang.NullPointerException at Beans.Content.write(Co

Storing contents of a file in a java object

Hi, i m writing a map reduce program which reads a file from HDFS and stores the contents in a static map (declared n initialized before executing map reduce). but however after executing the map-reduce program, my map returns 0 elements. is there any way i can make the data persistent in

Reading a subset of records from hdfs

Hi, Suppose i have a hdfs file with 10,000 entries. and i want my job to process 100 records at one time (to minimize loss of data during job crashes/ network errors etc). so if a job can read a subset of records from a fine in HDFS, i can combine with chaining to achieve my objective. for

difference between mapper and map runnable

Hi, Whats the difference between a mapper and map runnable and its usage? Regards Raakhi

Doubt in reducer

Hi, I am running a map reduce program which reads data from a file, processes it and writes the output into another file. i run 4 maps and 4 reduces, and my output is as follows: 09/08/27 17:34:37 INFO mapred.JobClient: Running job: job_200908271142_0026 09/08/27 17:34:38 INFO mapred.JobCli

Problems using custom output format

Hi, I was tryin to run a map reduce program which reads a txt file filled wid some keywords, my map task takes each of these keywords, does some processing and returns a complex object url which contains media, status, link and title (each being a string). my reduce class simply has one line

Doubt regarding mem cache.

Hi, I am not very clear as to how does the mem cache thing works. 1. When you set memcache to say 1MB, does hbase write all the table information into some cache memory and when the size reaches IMB, it writes into hadoop and after that the replication takes place??? 2. Is there any minimum limit

Doubt regarding Replication Factor

Hi, I just wanted to know what if we have set the replication factor greater than the number of nodes in the cluster. for example, i have only 3 nodes in my cluster but i set the replication factor to 5. will it create 3 copies and save it in each node, or can it create more than one copy per n

Re: Using JobControl in hadoop

I doesn't support job suspension, only the ability to > kill jobs. > > Cheers, > Tom > > On Mon, Jul 20, 2009 at 9:39 AM, Rakhi Khatwani > wrote: > > Hi, > > I have a scenario in which i have a list of 5 jobs. and an event > > handler for example when tr

Integration of Zookeeper with Hadoop 19

Hi, I was going through Zookeeper and really interested in implementing it, i am using hadoop-0.19.0 but coudnt find enough documentation which can help me use zookeeper with hadoop-0.19.0 has anyone tried it with hadoop-0.19.0 or hadoop-0.19.1? regards, Raakhi

Re: Using JobControl in hadoop

oldStatus = status; > } > try { >Thread.sleep(1000); > } catch (InterruptedException e) { >// ignore > } >} > > Hope this helps. > > Tom > > On Fri, Jul 17, 2009 at 9:10 AM, Rakhi Khatwani > wrote: > >

Re: Using chainmapper and chain reducer in hadoop

per will be called with the key, value pair from the > output.collect, > when map2.mapper returns, the line of code after the Map1 output.collect > will execute. > > If you pass true, instead of false, in your example above, a copy of the > key/value pair will be the passed. > > > On

Using chainmapper and chain reducer in hadoop

Hi I am trying out a simple example in which you have two maps and one reduce, Map1 and Map2 and Reduce1 now i wanna execute my job in the following fashion Map1 -> Map2 -> Reduce1 (o/p of map1 goes into map2 and o/p of map2 goes into reduce1) i have declared my conf as follows: JobCo

Using JobControl in hadoop

Hi, I was trying out a map-reduce example using JobControl. i create a jobConf conf1 object, add the necessary information then i create a job object Job job1 = new Job(conf1); n thn i delare JobControl object as follows: JobControl jobControl = new JobControl("JobControl1");

Re: Using Hadoop Index located in contrib folder

r > contrib/index/hadoop-0.19.1-index.jar -inputPaths -outputPath > -indexPath -conf > src/contrib/index/conf/index-config.xml > > I hope this helps. > > Regards, > - Bhushan > > > -Original Message- > From: Rakhi Khatwani [mailto:rakhi.khatw...@gmai

Using Hadoop Index located in contrib folder

Hi, i was going through Hadoop-contrib and came across hadoop-index.jar was wondering how to use it. there is no help online. i would greatly appreciate if i could get a small tutorial. forexample i have a file which contains data, i would like to create index for it. how do i go about it? Rega