Re: What is the class that launches the reducers?

rify the map output? It's only partially > dumped to disk. None of the intermediate data goes into HDFS. > > Daniel > > On Aug 25, 2016 4:10 PM, "xeon Mailinglist" <xeonmailingl...@gmail.com> > wrote: > >> But then I need to set identity maps to run the reduc

Re: What is the class that launches the reducers?

ra.com> wrote: One thing you can try is to write a map-only job first and then verify the map out. On Thu, Aug 25, 2016 at 1:18 PM, xeon Mailinglist <xeonmailingl...@gmail.com > wrote: > I am using Mapreduce v2. > > On Aug 25, 2016 8:18 PM, "xeon Mailinglist" <xeonmaili

Re: What is the class that launches the reducers?

I am using Mapreduce v2. On Aug 25, 2016 8:18 PM, "xeon Mailinglist" <xeonmailingl...@gmail.com> wrote: > I am trying to implement a mechanism in MapReduce v2 that allows to > suspend and resume a job. I must suspend a job when all the mappers finish, > and resume the

What is the class that launches the reducers?

I am trying to implement a mechanism in MapReduce v2 that allows to suspend and resume a job. I must suspend a job when all the mappers finish, and resume the job from that point after some time. I do this, because I want to verify the integrity of the map output before executing the reducers. I

Fwd: Submit, suspend and resume a mapreduce job execution

I know that it is not possible to suspend and resume mapreduce job, but I really need to find a workaround. I have looked to the ChainedJobs and to the CapacityScheduler, but I am really clueless on what to do. The main goal was to suspend a job when the map tasks finish and the reduce tasks

Improve IdentityMapper code for wordcount

Hi, I have created a map method that reads the map output of the wordcount example [1]. This example is away from using the IdentityMapper.class that MapReduce offers, but this is the only way that I have found to make a working IdentityMapper for the Wordcount. The only problem is that this

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With MapReduce v2 (Yarn), the output data that comes out from a map or a reduce task is saved in the local disk or the HDFS when all the tasks finish. Since tasks end at different times, I was expecting that the data were written as a task finish. For example, task 0 finish and so the output is

Re: Copy data from local disc with WebHDFS?

1. I am using these 2 commands below to try to copy data from local disk to HDFS. Unfortunately these commands are not working, and I don't understand why they are not working. I have configured HDFS to use WebHDFS protocol. How I copy data from the local disk to HDFS using WebHDfS protocol?

Re: 1 job with Input data from 2 HDFS?

Hi, I don't understand this part of your answer: read the other as a side-input directly by creating a client.. If I consider both inputs through the InputFormat, this means that a job will contain both input path in its configuration, and this is enough to work. So, what is the other? Is is the

Copy data between clusters during the job execution.

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Set Hadoop MRv2 behind a NAT

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org.apache.hadoop.hdfs.server.protocol.DisallowedDatanodeException

When I try to launch the namenode and the datanode in MRv2, the datanode can't connect to the namenode, giving me the error below. I also put the core-site file that I use below. The Firewall in the hosts is disabled. I don't have excluded nodes defined. Why the datanodes can't connect to the

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java.net.SocketTimeoutException in the Datanode

I am running an wordcount example it MRv2, but I get this error in a Datanode. It looks that it is a problem in the network between the Namenode and the Datanode, but I am not sure. What is this error? How can I fix this problem? 2014-01-03 16:46:29,319 INFO