hadoop - Name node is in safe mode. Not able to leave - Stack …
2013年4月4日 · root# bin/hadoop fs -mkdir t mkdir: org.apache.hadoop.hdfs.server.namenode.SafeModeException: Cannot create directory /user/root/t. Name node is in safe mode. not able to create anything in hdfs. I did. root# bin/hadoop fs -safemode leave But showing. safemode: Unknown command what is the …
Can Apache Spark run without Hadoop? - Stack Overflow
2015年8月15日 · The Apache Spark framework doesn't contain any default files system for storing data, so it uses Apache Hadoop that contains a distributed file system that's economical, and also major companies use Apache Hadoop, so Spark is moving to the Hadoop file system. Apache Spark is a data processing technology, big data having 10000+ technology, so ...
hadoop - Hive installation issues: Hive metastore database is not ...
2016年2月26日 · Starting metastore schema initialization to 2.0.0 Initialization script hive-schema-2.0.0.derby.sql Error: FUNCTION 'NUCLEUS_ASCII' already exists. (state=X0Y68,code=30000) org.apache.hadoop.hive.metastore.HiveMetaException: Schema initialization FAILED! Metastore state would be inconsistent !!
Checksum Exception when reading from or copying to hdfs in …
2016年3月25日 · I am trying to implement a parallelized algorithm using Apache hadoop, however I am facing some issues when trying to transfer a file from the local file system to hdfs. A checksum exception is being thrown when trying to read from or transfer a file.
Is there any official Docker images for Hadoop? - Stack Overflow
It's important to check if the chosen image includes only Hadoop. (I'm not sure about Cloudera image mentioned above). Check out the alternatives below: Sequenceiq: Image (+1M pulls) Github repo. Site Pull with: docker pull sequenceiq/hadoop-docker. Uhopper: Image(1M+ pulls) Bitbucket repo Site Pull with: docker pull uhopper/hadoop. Big data ...
What does "Error: Could not find or load main class …
2013年12月11日 · [Edited] Okay, i was reading too fast, you mentioned you were not able to run hadoop fs commands as well. I guess you might miss a few congifurations or haven't start the services at all. I guess you might miss a few congifurations or haven't start the services at all.
How to import org.apache Java dependencies w/ or w/o Maven
2015年8月6日 · So the quick background is I am creating a java program, that uses many different imports import org.apache.hadoop.conf.*; import org.apache.hadoop.fs.Path; import ...
hadoop - Connect from Java to Hive using JDBC - Stack Overflow
2016年12月29日 · I'm trying to connect from Java to Hive server 1. I found a question time ago in this forum but it doesn't work for me. I'm using this code: import java.sql.SQLException; import java.sql.Connection;
Datanode process not running in Hadoop - Stack Overflow
2012年8月10日 · I set up and configured a multi-node Hadoop cluster using this tutorial. When I type in the start-all.sh command, it shows all the processes initializing properly as follows: starting namenode, l...
hadoop - Spark iterate HDFS directory - Stack Overflow
You can use below code to iterate recursivly through a parent HDFS directory, storing only sub-directories up to a third level.