hadoop2

Pig and Hadoop connection error

由 牧云@^-^@ 提交于 2019-12-05 02:36:51
问题 I am getting ConnectionRefused error when I am running pig in mapreduce mode. Details: I have installed Pig from tarball( pig-0.14), and exported the classpath in bashrc. I have all the Hadoop (hadoop-2.5) daemons up and running (confirmed by JPS). [root@localhost sbin]# jps 2272 Jps 2130 DataNode 2022 NameNode 2073 SecondaryNameNode 2238 NodeManager 2190 ResourceManager I am running pig in mapreduce mode: [root@localhost sbin]# pig grunt> file = LOAD '/input/pig_input.csv' USING PigStorage('

Setting Spark as default execution engine for Hive

由 风流意气都作罢 提交于 2019-12-05 01:14:36
问题 Hadoop 2.7.3, Spark 2.1.0 and Hive 2.1.1. I am trying to set spark as default execution engine for hive. I uploaded all jars in $SPARK_HOME/jars to hdfs folder and copied scala-library, spark-core, and spark-network-common jars to HIVE_HOME/lib. Then I configured hive-site.xml with the following properties: <property> <name>hive.execution.engine</name> <value>spark</value> </property> <property> <name>spark.master</name> <value>spark://master:7077</value> <description>Spark Master URL<

Hadoop client and cluster separation

由 时光毁灭记忆、已成空白 提交于 2019-12-04 21:43:53
I am a newbie in hadoop, linux as well. My professor asked us to seperate Hadoop client and cluster using port mapping or VPN. I don't understand the meaning of such separation. Can anybody give me a hint? Now I get the idea of cluster client separation. I think it is required that hadoop is also installed in the client machine. When the client submit a hadoop job , it is submit to the masters of the clusters. And I have some naiive ideas: 1.Create a client machine and install hadoop . 2.set fs.default.name to be hdfs://master:9000 3.set dfs.namenode.name.dir to be file://master/home/hduser

hadoop/yarn and task parallelization on non-hdfs filesystems

由 我们两清 提交于 2019-12-04 21:14:04
问题 I've instantiated a Hadoop 2.4.1 cluster and I've found that running MapReduce applications will parallelize differently depending on what kind of filesystem the input data is on. Using HDFS, a MapReduce job will spawn enough containers to maximize use of all available memory. For example, a 3-node cluster with 172GB of memory with each map task allocating 2GB, about 86 application containers will be created. On a filesystem that isn't HDFS (like NFS or in my use case, a parallel filesystem),

Hadoop, MapReduce Custom Java Counters Exception in thread “main” java.lang.IllegalStateException: Job in state DEFINE instead of RUNNING

由 寵の児 提交于 2019-12-04 18:51:33
Error is: Exception in thread "main" java.lang.IllegalStateException: Job in state DEFINE instead of RUNNING at org.apache.hadoop.mapreduce.Job.ensureState(Job.java:294) at org.apache.hadoop.mapreduce.Job.getCounters(Job.java:762) at com.aamend.hadoop.MapReduce.CountryIncomeConf.main(CountryIncomeConf.java:41) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at

Hadoop 2.6.1 Warning: WARN util.NativeCodeLoader

由 被刻印的时光 ゝ 提交于 2019-12-04 18:48:35
I'm running hadoop 2.6.1 on OS X 10.10.5. I'm getting this warning: WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable I've read that this problem can be caused by running a 32bit native library libhadoop.so.1.0.0 with a 64 bit version of hadoop. I've checked my version of libhadoop.so.1.0.0 and it is 64 bit. $ find ~/hadoop-2.6.1/ -name libhadoop.so.1.0.0 -ls 136889669 1576 -rwxr-xr-x 1 davidlaxer staff 806303 Sep 16 14:18 /Users/davidlaxer/hadoop-2.6.1//lib/native/libhadoop.so.1.0.0 $ file /Users/davidlaxer/hadoop

Running Hadoop MR jobs without Admin privilege on Windows

由 好久不见. 提交于 2019-12-04 18:02:51
I have installed Hadoop 2.3.0 in windows and able to execute MR jobs successfully. But when I trying to execute MR jobs in normal privilege (without admin privilege) means job get fails with following exception. Here I tried with Pig Script sample. 2014-10-15 12:02:32,822 WARN [main] org.apache.hadoop.security.UserGroupInformation: PriviledgedActionException as:kaveen (auth:SIMPLE) cause:java.io.IOException: Split class org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigSplit not found 2014-10-15 12:02:32,823 WARN [main] org.apache.hadoop.mapred.YarnChild: Exception running child

maven artifactId hadoop 2.2.0 for hadoop-core

由 淺唱寂寞╮ 提交于 2019-12-04 16:06:44
I am migrating my application from hadoop 1.0.3 to hadoop 2.2.0 and maven build had hadoop-core marked as dependency. Since hadoop-core is not present for hadoop 2.2.0. I tried replacing it with hadoop-client and hadoop-common but I am still getting this error for ant.filter. Can anybody please suggest which artifact to use? previous config : <dependency> <groupId>org.apache.hadoop</groupId> <artifactId>hadoop-core</artifactId> <version>1.0.3</version> </dependency> New Config: <dependency> <groupId>org.apache.hadoop</groupId> <artifactId>hadoop-client</artifactId> <version>2.2.0</version> <

Hadoop gen1 vs Hadoop gen2

由 感情迁移 提交于 2019-12-04 14:15:34
问题 I am a bit confused about place of tasktracker in Hadoop-2.x. Daemons in Hadoop-1.x are namenode, datanode, jobtracker, taskracker and secondarynamenode Daemons in Hadoop-2.x are namenode, datanode, resourcemanager, applicationmaster, secondarynamenode. This means Jobtracker has split up into: resourcemanager and applicationmaster So where is tasktracker ? 回答1: In YARN (the new execution framework in Hadoop 2), MapReduce doesn't exist in the way it did before. YARN is a more general purpose

How to fix Hadoop WARNING: An illegal reflective access operation has occurred error on Ubuntu

由 喜夏-厌秋 提交于 2019-12-04 13:44:35
问题 I have installed Java openjdk version "10.0.2" and Hadoop 2.9.0 successfully. All processes are running well hadoopusr@amalendu:~$ jps 19888 NameNode 20388 DataNode 20898 NodeManager 20343 SecondaryNameNode 20539 ResourceManager 21118 Jps But when ever i am trying to execute any command like hdfs dfs -ls / getting this warnings hadoopusr@amalendu:~$ hdfs dfs -ls / WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by org.apache.hadoop.security
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