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HADOOP QUESTIONS

Hadoop writes incomplete file to HDFS
Hadoop writes incomplete file to HDFS
I wish this help you As a partial answer, we found that in the worker nodes, the GC was causing lots of long pauses (3~5 secs) every six hours (the predefined GC span). We increased the heap from 1GB to 4GB and seems solved. What is causing the heap
TAG : hadoop
Date : November 28 2020, 11:01 PM , By : Lava Kumar
Moving hadoop master node in another box: how to handle HDFS
Moving hadoop master node in another box: how to handle HDFS
With these it helps I describe here how I did it, since it worked, do't know if it is the best way, but it works without having file system in an inconsistent state. Very simple approach was: set HDFS safe mode: hdfs dfsadmin -safemode enter stop the
TAG : hadoop
Date : November 27 2020, 11:01 PM , By : Ivan Ivanov
Why the field has been cut into two parts in Hive?
Why the field has been cut into two parts in Hive?
should help you out When you create a table using create table novaya.unnormal as statement, without specifying any input/output format and delimiters, all defaults will be chosen which probably causes the 스 character to act as a separator. I suggest
TAG : hadoop
Date : November 25 2020, 11:01 PM , By : Oumayma Amara
how to change default output delimiter in Spark
how to change default output delimiter in Spark
wish helps you For an RDD, you'll just need to make a string with a pipe separated value on the product iterator :
TAG : hadoop
Date : November 23 2020, 11:01 PM , By : Raja rehan
Apache Sqoop Where clause not working while using SQOOP IMPORT
Apache Sqoop Where clause not working while using SQOOP IMPORT
this will help You are using both --query and --where. That's why sqoop is not respecting --where tag.--query is a superset of --where. It covers WHERE conditions.
TAG : hadoop
Date : November 20 2020, 11:01 PM , By : RickyJS
How does the use of startrow and stoprow not result in a full table scan in HBase?
How does the use of startrow and stoprow not result in a full table scan in HBase?
Hope this helps In HBase a table is split into regions. A region is a set of rows that is served by a specific region server. A region server has (in general) multiple regions from multiple tables for which it handles the requests.Because the rows ar
TAG : hadoop
Date : November 13 2020, 11:01 PM , By : Rick Boyer
Is the `dfs.data.dir` property deprecated in Hadoop 2.x series?
Is the `dfs.data.dir` property deprecated in Hadoop 2.x series?
seems to work fine Please look at this link Deprecated property, Since the property is marked as deprecated, still you can utilize the functional behavior of the property. Better use the Deprecated property.
TAG : hadoop
Date : October 29 2020, 12:01 AM , By : Tush R
Where exactly should hadoop.tmp.dir be set? core-site.xml or hdfs-site.xml?
Where exactly should hadoop.tmp.dir be set? core-site.xml or hdfs-site.xml?
it fixes the issue hadoop.tmp.dir (A base for other temporary directories) is property, that need to be set in core-site.xml, it is like export in linuxEx:
TAG : hadoop
Date : October 29 2020, 12:01 AM , By : Dana Sagi
How to create UDF in pig for categorize columns with respect to another filed
How to create UDF in pig for categorize columns with respect to another filed
will be helpful for those in need you can create pig udfs in eclipsecreate a project in eclipse with pig jars and try below code
TAG : hadoop
Date : October 20 2020, 03:08 PM , By : sara
Ambari Hadoop/Spark and Elasticsearch SSL Integration
Ambari Hadoop/Spark and Elasticsearch SSL Integration
should help you out For the project setup part of the question you can take a look athttps://github.com/zouzias/elasticsearch-spark-example
TAG : hadoop
Date : October 16 2020, 03:08 PM , By : Jake M.
Is it possible to create a hive table with text output format?
Is it possible to create a hive table with text output format?
wish helps you zlib/deflate compression format - It is the default data compression format. The file extension of this compression format is .deflate. The following configuration is used to set this format:
TAG : hadoop
Date : October 14 2020, 09:39 AM , By : Terry Downing
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