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HADOOP QUESTIONS

No FileSystem for scheme: sftp
No FileSystem for scheme: sftp
may help you . The exception is coming, because Hadoop is not able to find a file system implementation for the scheme: sftp.The exception occurs in FileSystem.java. The framework tries to find the value for configuration parameter fs.sftp.impl and w
TAG : hadoop
Date : November 21 2020, 07:38 AM , By : trevor
Why multiple MapReduce jobs for one pig / Hive job?
Why multiple MapReduce jobs for one pig / Hive job?
this one helps. Templeton Controller Job is like a Parent job which will call another child map-reduce job. It is basically to control the execution.Before executing, Pig basically comes up with a execution plan - where it scans all the steps in the
TAG : hadoop
Date : November 19 2020, 03:54 PM , By : Avital Tamir
Aggregate Resource Allocation for a job in YARN
Aggregate Resource Allocation for a job in YARN
Any of those help I am new to Hadoop. When i run a job, i see the aggregate resource allocation for that job as 251248654 MB-seconds, 24462 vcore-seconds. However, when i find the details about the cluster, it shows there are 888 Vcores-total and 15.
TAG : hadoop
Date : November 19 2020, 12:35 AM , By : payal udasi
Hive: How can i build a UDTF ?
Hive: How can i build a UDTF ?
I hope this helps you . I am guessing you're trying to use the UDF through JDBC. Try the following things: remove the ; at the end of each line use execute instead of executeUpdate make sure that the jar exists where the hive server is
TAG : hadoop
Date : November 07 2020, 01:43 PM , By : ebs1985
HDFS Corrupt Files after Spark Hana Connector Install
HDFS Corrupt Files after Spark Hana Connector Install
like below fixes the issue The Chef script that was used to set up the cluster nodes in an cloud environment set the VM’s storage as primary storage volume for DataNodes. So hdfs ran out of storage. But only in one of the three attached volumes. The
TAG : hadoop
Date : November 07 2020, 01:32 PM , By : SrBox
NullPointerException when trying to read an RDF file using Jena elephas's TriplesInputFormat in Spark
NullPointerException when trying to read an RDF file using Jena elephas's TriplesInputFormat in Spark
fixed the issue. Will look into that further This is a bug in Elephas which has been filed as JENA-1075 and has now been fixedThe bug only affects Turtle inputs so you can avoid this by converting your input data to formats other than Turtle.
TAG : hadoop
Date : November 06 2020, 03:59 AM , By : Roman Kumul
Hadoop in the AWS free tier?
Hadoop in the AWS free tier?
Hope that helps If you want to limit your hadoop cluster nodes only to t2.micro instances and total EBS volumes size to 30 GB, then you can run [in theory] a hadoop cluster within free tier. Do note that the hardware on t2.micro are of meagre.The thi
TAG : hadoop
Date : November 05 2020, 06:58 PM , By : mad.levente
How do I install Cloudera CDH on 100 Node cluster without using Cloudera manager?
How do I install Cloudera CDH on 100 Node cluster without using Cloudera manager?
I wish did fix the issue. CDH supports both Parcel based and Package based installation. You can use Puppet/Chef these type of configuration management tools to do the package based install if you wish. However, the recommended way is to use Cloudera
TAG : hadoop
Date : November 05 2020, 09:01 AM , By : Hugh
Performance Issue in Hadoop,HBase & Hive
Performance Issue in Hadoop,HBase & Hive
I hope this helps you . Data in HBase is only 'indexed' by rowkey. If you're querying in Hive on anything other than rowkey prefixes, you will generally be performing a full table scan. There are some optimizations that can be made with HBase filters
TAG : hadoop
Date : November 04 2020, 04:00 PM , By : nico
Testing Hadoop to Teradata flow
Testing Hadoop to Teradata flow
fixed the issue. Will look into that further Teradata offers connectors for Cloudera (link) and Hortonworks (link) which facilitate moving data between the platforms. QueryGrid is an offering from Teradata that allows you to create "linked servers" o
TAG : hadoop
Date : November 01 2020, 04:09 PM , By : Chris
What to choose yarn-cluster or yarn-client for a reporting platform?
What to choose yarn-cluster or yarn-client for a reporting platform?
may help you . Adding some more info to Danier Darabos answer : Apart from hosting application/faillover and where Driver runs ( Application Master in yarn-cluster mode or Client in yarn-client mode, other features remains same. But yarn-client mode
TAG : hadoop
Date : October 28 2020, 11:27 AM , By : Janno Põldma
How to create a partitioned table using Spark SQL
How to create a partitioned table using Spark SQL
wish helps you Probably this is not supported by Spark yet. I had the same problems with AVRO files and bucketed tables with Spark 2.0, converted to ORC first and then it worked. So try underlying ORC files instead of AVRO. Use ORC files in "current"
TAG : hadoop
Date : October 22 2020, 02:00 PM , By : Robin Poulose
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