Configuración del clúster Hadoop – java.net.ConnectException: conexión rechazada

Quiero configurar un hadoop-cluster en modo pseudo-distribuido. Logré realizar todos los pasos de configuración, incluido el inicio de Namenode, Datanode, Jobtracker y Tasktracker en mi máquina.

Luego traté de ejecutar algunos progtwigs ejemplares y me enfrenté a la java.net.ConnectException: Connection refused error de java.net.ConnectException: Connection refused . Volví a los primeros pasos de ejecutar algunas operaciones en modo independiente y enfrenté el mismo problema.

Incluso realicé una comprobación triple de todos los pasos de instalación y no tengo idea de cómo solucionarlo. (Soy nuevo en Hadoop y un usuario principiante de Ubuntu, por lo tanto, le pido amablemente que “lo tenga en cuenta” si proporciona alguna guía o sugerencia).

Esta es la salida de error que sigo recibiendo:

 hduser@marta-komputer:/usr/local/hadoop$ bin/hadoop jar share/hadoop/mapreduce/hadoop-mapreduce-examples-2.6.0.jar grep input output 'dfs[az.]+' 15/02/22 18:23:04 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable 15/02/22 18:23:04 INFO client.RMProxy: Connecting to ResourceManager at /0.0.0.0:8032 java.net.ConnectException: Call From marta-komputer/127.0.1.1 to localhost:9000 failed on connection exception: java.net.ConnectException: Connection refused; For more details see: http://wiki.apache.org/hadoop/ConnectionRefused at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.lang.reflect.Constructor.newInstance(Constructor.java:408) at org.apache.hadoop.net.NetUtils.wrapWithMessage(NetUtils.java:791) at org.apache.hadoop.net.NetUtils.wrapException(NetUtils.java:731) at org.apache.hadoop.ipc.Client.call(Client.java:1472) at org.apache.hadoop.ipc.Client.call(Client.java:1399) at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:232) at com.sun.proxy.$Proxy9.delete(Unknown Source) at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.delete(ClientNamenodeProtocolTranslatorPB.java:521) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:483) at org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:187) at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:102) at com.sun.proxy.$Proxy10.delete(Unknown Source) at org.apache.hadoop.hdfs.DFSClient.delete(DFSClient.java:1929) at org.apache.hadoop.hdfs.DistributedFileSystem$12.doCall(DistributedFileSystem.java:638) at org.apache.hadoop.hdfs.DistributedFileSystem$12.doCall(DistributedFileSystem.java:634) at org.apache.hadoop.fs.FileSystemLinkResolver.resolve(FileSystemLinkResolver.java:81) at org.apache.hadoop.hdfs.DistributedFileSystem.delete(DistributedFileSystem.java:634) at org.apache.hadoop.examples.Grep.run(Grep.java:95) at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70) at org.apache.hadoop.examples.Grep.main(Grep.java:101) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:483) at org.apache.hadoop.util.ProgramDriver$ProgramDescription.invoke(ProgramDriver.java:71) at org.apache.hadoop.util.ProgramDriver.run(ProgramDriver.java:144) at org.apache.hadoop.examples.ExampleDriver.main(ExampleDriver.java:74) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:483) at org.apache.hadoop.util.RunJar.run(RunJar.java:221) at org.apache.hadoop.util.RunJar.main(RunJar.java:136) Caused by: java.net.ConnectException: Connection refused at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method) at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:716) at org.apache.hadoop.net.SocketIOWithTimeout.connect(SocketIOWithTimeout.java:206) at org.apache.hadoop.net.NetUtils.connect(NetUtils.java:530) at org.apache.hadoop.net.NetUtils.connect(NetUtils.java:494) at org.apache.hadoop.ipc.Client$Connection.setupConnection(Client.java:607) at org.apache.hadoop.ipc.Client$Connection.setupIOstreams(Client.java:705) at org.apache.hadoop.ipc.Client$Connection.access$2800(Client.java:368) at org.apache.hadoop.ipc.Client.getConnection(Client.java:1521) at org.apache.hadoop.ipc.Client.call(Client.java:1438) ... 32 more 

etc / hadoop / hadoop-env.sh archivo:

 # The java implementation to use. export JAVA_HOME=/usr/lib/jvm/java-8-oracle # The jsvc implementation to use. Jsvc is required to run secure datanodes # that bind to privileged ports to provide authentication of data transfer # protocol. Jsvc is not required if SASL is configured for authentication of # data transfer protocol using non-privileged ports. #export JSVC_HOME=${JSVC_HOME} export HADOOP_CONF_DIR=${HADOOP_CONF_DIR:-"/etc/hadoop"} # Extra Java CLASSPATH elements. Automatically insert capacity-scheduler. for f in $HADOOP_HOME/contrib/capacity-scheduler/*.jar; do if [ "$HADOOP_CLASSPATH" ]; then export HADOOP_CLASSPATH=$HADOOP_CLASSPATH:$f else export HADOOP_CLASSPATH=$f fi done # The maximum amount of heap to use, in MB. Default is 1000. #export HADOOP_HEAPSIZE= #export HADOOP_NAMENODE_INIT_HEAPSIZE="" # Extra Java runtime options. Empty by default. export HADOOP_OPTS="$HADOOP_OPTS -Djava.net.preferIPv4Stack=true" # Command specific options appended to HADOOP_OPTS when specified export HADOOP_NAMENODE_OPTS="-Dhadoop.security.logger=${HADOOP_SECURITY_LOGGER:-INFO,RFAS} -Dhdfs.audit.logger=${HDFS_AUDIT_LOGGER:-INFO,NullAppender} $HADOOP_NAMENODE_OPTS" export HADOOP_DATANODE_OPTS="-Dhadoop.security.logger=ERROR,RFAS $HADOOP_DATANODE_OPTS" export HADOOP_SECONDARYNAMENODE_OPTS="-Dhadoop.security.logger=${HADOOP_SECURITY_LOGGER:-INFO,RFAS} -Dhdfs.audit.logger=${HDFS_AUDIT_LOGGER:-INFO,NullAppender} $HADOOP_SECONDARYNAMENODE_OPTS" export HADOOP_NFS3_OPTS="$HADOOP_NFS3_OPTS" export HADOOP_PORTMAP_OPTS="-Xmx512m $HADOOP_PORTMAP_OPTS" # The following applies to multiple commands (fs, dfs, fsck, distcp etc) export HADOOP_CLIENT_OPTS="-Xmx512m $HADOOP_CLIENT_OPTS" #HADOOP_JAVA_PLATFORM_OPTS="-XX:-UsePerfData $HADOOP_JAVA_PLATFORM_OPTS" # On secure datanodes, user to run the datanode as after dropping privileges. # This **MUST** be uncommented to enable secure HDFS if using privileged ports # to provide authentication of data transfer protocol. This **MUST NOT** be # defined if SASL is configured for authentication of data transfer protocol # using non-privileged ports. export HADOOP_SECURE_DN_USER=${HADOOP_SECURE_DN_USER} # Where log files are stored. $HADOOP_HOME/logs by default. #export HADOOP_LOG_DIR=${HADOOP_LOG_DIR}/$USER # Where log files are stored in the secure data environment. export HADOOP_SECURE_DN_LOG_DIR=${HADOOP_LOG_DIR}/${HADOOP_HDFS_USER} # HDFS Mover specific parameters ### # Specify the JVM options to be used when starting the HDFS Mover. # These options will be appended to the options specified as HADOOP_OPTS # and therefore may override any similar flags set in HADOOP_OPTS # # export HADOOP_MOVER_OPTS="" ### # Advanced Users Only! ### # The directory where pid files are stored. /tmp by default. # NOTE: this should be set to a directory that can only be written to by # the user that will run the hadoop daemons. Otherwise there is the # potential for a symlink attack. export HADOOP_PID_DIR=${HADOOP_PID_DIR} export HADOOP_SECURE_DN_PID_DIR=${HADOOP_PID_DIR} # A string representing this instance of hadoop. $USER by default. export HADOOP_IDENT_STRING=$USER 

archivo .bashrc fragmento relacionado con Hadoop:

 # -- HADOOP ENVIRONMENT VARIABLES START -- # export JAVA_HOME=/usr/lib/jvm/java-8-oracle export HADOOP_HOME=/usr/local/hadoop export PATH=$PATH:$HADOOP_HOME/bin export PATH=$PATH:$HADOOP_HOME/sbin export HADOOP_MAPRED_HOME=$HADOOP_HOME export HADOOP_COMMON_HOME=$HADOOP_HOME export HADOOP_HDFS_HOME=$HADOOP_HOME export YARN_HOME=$HADOOP_HOME export HADOOP_COMMON_LIB_NATIVE_DIR=$HADOOP_HOME/lib/native export HADOOP_OPTS="-Djava.library.path=$HADOOP_HOME/lib" # -- HADOOP ENVIRONMENT VARIABLES END -- # 

/usr/local/hadoop/etc/hadoop/core-site.xml file:

   hadoop.tmp.dir /usr/local/hadoop_tmp A base for other temporary directories.   fs.default.name hdfs://localhost:9000   

/usr/local/hadoop/etc/hadoop/hdfs-site.xml file:

   dfs.replication 1   dfs.namenode.name.dir file:/usr/local/hadoop_tmp/hdfs/namenode   dfs.datanode.data.dir file:/usr/local/hadoop_tmp/hdfs/datanode   

/usr/local/hadoop/etc/hadoop/yarn-site.xml file:

   yarn.nodemanager.aux-services mapreduce_shuffle   yarn.nodemanager.aux-services.mapreduce.shuffle.class org.apache.hadoop.mapred.ShuffleHandler   

/usr/local/hadoop/etc/hadoop/mapred-site.xml file:

   mapreduce.framework.name yarn   

Ejecutando hduser@marta-komputer:/usr/local/hadoop$ bin/hdfs namenode -format resultado una salida de la siguiente manera (Sustituyo parte de ella por (...) ):

 hduser@marta-komputer:/usr/local/hadoop$ bin/hdfs namenode -format 15/02/22 18:50:47 INFO namenode.NameNode: STARTUP_MSG: /************************************************************ STARTUP_MSG: Starting NameNode STARTUP_MSG: host = marta-komputer/127.0.1.1 STARTUP_MSG: args = [-format] STARTUP_MSG: version = 2.6.0 STARTUP_MSG: classpath = /usr/local/hadoop/etc/hadoop:/usr/local/hadoop/share/hadoop/common/lib/htrace-core-3.0.4.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-cli (...)2.6.0.jar:/usr/local/hadoop/share/hadoop/mapreduce/hadoop-mapreduce-client-common-2.6.0.jar:/usr/local/hadoop/share/hadoop/mapreduce/hadoop-mapreduce-client-hs-2.6.0.jar:/usr/local/hadoop/share/hadoop/mapreduce/hadoop-mapreduce-client-app-2.6.0.jar:/usr/local/hadoop/share/hadoop/mapreduce/hadoop-mapreduce-client-shuffle-2.6.0.jar:/usr/local/hadoop/contrib/capacity-scheduler/*.jar STARTUP_MSG: build = https://git-wip-us.apache.org/repos/asf/hadoop.git -r e3496499ecb8d220fba99dc5ed4c99c8f9e33bb1; compiled by 'jenkins' on 2014-11-13T21:10Z STARTUP_MSG: java = 1.8.0_31 ************************************************************/ 15/02/22 18:50:47 INFO namenode.NameNode: registered UNIX signal handlers for [TERM, HUP, INT] 15/02/22 18:50:47 INFO namenode.NameNode: createNameNode [-format] 15/02/22 18:50:47 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable Formatting using clusterid: CID-0b65621a-eab3-47a4-bfd0-62b5596a940c 15/02/22 18:50:48 INFO namenode.FSNamesystem: No KeyProvider found. 15/02/22 18:50:48 INFO namenode.FSNamesystem: fsLock is fair:true 15/02/22 18:50:48 INFO blockmanagement.DatanodeManager: dfs.block.invalidate.limit=1000 15/02/22 18:50:48 INFO blockmanagement.DatanodeManager: dfs.namenode.datanode.registration.ip-hostname-check=true 15/02/22 18:50:48 INFO blockmanagement.BlockManager: dfs.namenode.startup.delay.block.deletion.sec is set to 000:00:00:00.000 15/02/22 18:50:48 INFO blockmanagement.BlockManager: The block deletion will start around 2015 Feb 22 18:50:48 15/02/22 18:50:48 INFO util.GSet: Computing capacity for map BlocksMap 15/02/22 18:50:48 INFO util.GSet: VM type = 64-bit 15/02/22 18:50:48 INFO util.GSet: 2.0% max memory 889 MB = 17.8 MB 15/02/22 18:50:48 INFO util.GSet: capacity = 2^21 = 2097152 entries 15/02/22 18:50:48 INFO blockmanagement.BlockManager: dfs.block.access.token.enable=false 15/02/22 18:50:48 INFO blockmanagement.BlockManager: defaultReplication = 1 15/02/22 18:50:48 INFO blockmanagement.BlockManager: maxReplication = 512 15/02/22 18:50:48 INFO blockmanagement.BlockManager: minReplication = 1 15/02/22 18:50:48 INFO blockmanagement.BlockManager: maxReplicationStreams = 2 15/02/22 18:50:48 INFO blockmanagement.BlockManager: shouldCheckForEnoughRacks = false 15/02/22 18:50:48 INFO blockmanagement.BlockManager: replicationRecheckInterval = 3000 15/02/22 18:50:48 INFO blockmanagement.BlockManager: encryptDataTransfer = false 15/02/22 18:50:48 INFO blockmanagement.BlockManager: maxNumBlocksToLog = 1000 15/02/22 18:50:48 INFO namenode.FSNamesystem: fsOwner = hduser (auth:SIMPLE) 15/02/22 18:50:48 INFO namenode.FSNamesystem: supergroup = supergroup 15/02/22 18:50:48 INFO namenode.FSNamesystem: isPermissionEnabled = true 15/02/22 18:50:48 INFO namenode.FSNamesystem: HA Enabled: false 15/02/22 18:50:48 INFO namenode.FSNamesystem: Append Enabled: true 15/02/22 18:50:48 INFO util.GSet: Computing capacity for map INodeMap 15/02/22 18:50:48 INFO util.GSet: VM type = 64-bit 15/02/22 18:50:48 INFO util.GSet: 1.0% max memory 889 MB = 8.9 MB 15/02/22 18:50:48 INFO util.GSet: capacity = 2^20 = 1048576 entries 15/02/22 18:50:48 INFO namenode.NameNode: Caching file names occuring more than 10 times 15/02/22 18:50:48 INFO util.GSet: Computing capacity for map cachedBlocks 15/02/22 18:50:48 INFO util.GSet: VM type = 64-bit 15/02/22 18:50:48 INFO util.GSet: 0.25% max memory 889 MB = 2.2 MB 15/02/22 18:50:48 INFO util.GSet: capacity = 2^18 = 262144 entries 15/02/22 18:50:48 INFO namenode.FSNamesystem: dfs.namenode.safemode.threshold-pct = 0.9990000128746033 15/02/22 18:50:48 INFO namenode.FSNamesystem: dfs.namenode.safemode.min.datanodes = 0 15/02/22 18:50:48 INFO namenode.FSNamesystem: dfs.namenode.safemode.extension = 30000 15/02/22 18:50:48 INFO namenode.FSNamesystem: Retry cache on namenode is enabled 15/02/22 18:50:48 INFO namenode.FSNamesystem: Retry cache will use 0.03 of total heap and retry cache entry expiry time is 600000 millis 15/02/22 18:50:48 INFO util.GSet: Computing capacity for map NameNodeRetryCache 15/02/22 18:50:48 INFO util.GSet: VM type = 64-bit 15/02/22 18:50:48 INFO util.GSet: 0.029999999329447746% max memory 889 MB = 273.1 KB 15/02/22 18:50:48 INFO util.GSet: capacity = 2^15 = 32768 entries 15/02/22 18:50:48 INFO namenode.NNConf: ACLs enabled? false 15/02/22 18:50:48 INFO namenode.NNConf: XAttrs enabled? true 15/02/22 18:50:48 INFO namenode.NNConf: Maximum size of an xattr: 16384 Re-format filesystem in Storage Directory /usr/local/hadoop_tmp/hdfs/namenode ? (Y or N) Y 15/02/22 18:50:50 INFO namenode.FSImage: Allocated new BlockPoolId: BP-948369552-127.0.1.1-1424627450316 15/02/22 18:50:50 INFO common.Storage: Storage directory /usr/local/hadoop_tmp/hdfs/namenode has been successfully formatted. 15/02/22 18:50:50 INFO namenode.NNStorageRetentionManager: Going to retain 1 images with txid >= 0 15/02/22 18:50:50 INFO util.ExitUtil: Exiting with status 0 15/02/22 18:50:50 INFO namenode.NameNode: SHUTDOWN_MSG: /************************************************************ SHUTDOWN_MSG: Shutting down NameNode at marta-komputer/127.0.1.1 ************************************************************/ 

El inicio de dfs y de yarn da como resultado el siguiente resultado:

 hduser@marta-komputer:/usr/local/hadoop$ start-dfs.sh 15/02/22 18:53:05 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable Starting namenodes on [localhost] localhost: starting namenode, logging to /usr/local/hadoop/logs/hadoop-hduser-namenode-marta-komputer.out localhost: starting datanode, logging to /usr/local/hadoop/logs/hadoop-hduser-datanode-marta-komputer.out Starting secondary namenodes [0.0.0.0] 0.0.0.0: starting secondarynamenode, logging to /usr/local/hadoop/logs/hadoop-hduser-secondarynamenode-marta-komputer.out 15/02/22 18:53:20 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable hduser@marta-komputer:/usr/local/hadoop$ start-yarn.sh starting yarn daemons starting resourcemanager, logging to /usr/local/hadoop/logs/yarn-hduser-resourcemanager-marta-komputer.out localhost: starting nodemanager, logging to /usr/local/hadoop/logs/yarn-hduser-nodemanager-marta-komputer.out 

Llamar jps poco después de eso da:

 hduser@marta-komputer:/usr/local/hadoop$ jps 11696 ResourceManager 11842 NodeManager 11171 NameNode 11523 SecondaryNameNode 12167 Jps 

salida netstat :

 hduser@marta-komputer:/usr/local/hadoop$ sudo netstat -lpten | grep java tcp 0 0 0.0.0.0:8088 0.0.0.0:* LISTEN 1001 690283 11696/java tcp 0 0 0.0.0.0:42745 0.0.0.0:* LISTEN 1001 684574 11842/java tcp 0 0 0.0.0.0:13562 0.0.0.0:* LISTEN 1001 680955 11842/java tcp 0 0 0.0.0.0:8030 0.0.0.0:* LISTEN 1001 684531 11696/java tcp 0 0 0.0.0.0:8031 0.0.0.0:* LISTEN 1001 684524 11696/java tcp 0 0 0.0.0.0:8032 0.0.0.0:* LISTEN 1001 680879 11696/java tcp 0 0 0.0.0.0:8033 0.0.0.0:* LISTEN 1001 687392 11696/java tcp 0 0 0.0.0.0:8040 0.0.0.0:* LISTEN 1001 680951 11842/java tcp 0 0 127.0.0.1:9000 0.0.0.0:* LISTEN 1001 687242 11171/java tcp 0 0 0.0.0.0:8042 0.0.0.0:* LISTEN 1001 680956 11842/java tcp 0 0 0.0.0.0:50090 0.0.0.0:* LISTEN 1001 690252 11523/java tcp 0 0 0.0.0.0:50070 0.0.0.0:* LISTEN 1001 687239 11171/java 

/ etc / hosts file:

 127.0.0.1 localhost 127.0.1.1 marta-komputer # The following lines are desirable for IPv6 capable hosts ::1 ip6-localhost ip6-loopback fe00::0 ip6-localnet ff00::0 ip6-mcastprefix ff02::1 ip6-allnodes ff02::2 ip6-allrouters 

=============================================== ==

ACTUALIZACIÓN 1.

Actualicé core-site.xml y ahora tengo:

  fs.default.name hdfs://marta-komputer:9000  

pero sigo recibiendo el error, comenzando ahora como:

 15/03/01 00:59:34 INFO client.RMProxy: Connecting to ResourceManager at /0.0.0.0:8032 java.net.ConnectException: Call From marta-komputer.home/192.168.1.8 to marta-komputer:9000 failed on connection exception: java.net.ConnectException: Connection refused; For more details see: http://wiki.apache.org/hadoop/ConnectionRefused 

También noté que telnet localhost 9000 no funciona:

 hduser@marta-komputer:~$ telnet localhost 9000 Trying 127.0.0.1... telnet: Unable to connect to remote host: Connection refused 

Para mí, estos pasos funcionaron

  1. stop-all.sh
  2. hadoop namenode -format
  3. start-all.sh

Hola Edite su conf / core-site.xml y cambie localhost a 0.0.0.0. Usa el conf abajo Eso debería funcionar.

   fs.default.name hdfs://0.0.0.0:9000  

Finalmente, logré que mi servicio escuchara el puerto 9000 agregando al /etc/ssh/sshd_config la siguiente línea:

 Port 9000 

Seguí este serverguide / openssh-server (contiene también algunos comentarios importantes sobre cómo hacer una copia del archivo original, reiniciar la aplicación del servidor sshd, etc.)

Después de esto puedo ver:

salida telnet :

 martakarass@marta-komputer:~$ telnet localhost 9000 Trying 127.0.0.1... Connected to localhost. 

salida nmap :

 martakarass@marta-komputer:~$ nmap localhost Starting Nmap 6.40 ( http://nmap.org ) at 2015-05-01 18:28 CEST Nmap scan report for localhost (127.0.0.1) Host is up (0.00023s latency). Not shown: 994 closed ports PORT STATE SERVICE 22/tcp open ssh 139/tcp open netbios-ssn 445/tcp open microsoft-ds 631/tcp open ipp 902/tcp open iss-realsecure 9000/tcp open cslistener Nmap done: 1 IP address (1 host up) scanned in 0.05 seconds 

salida netstat :

 martakarass@marta-komputer:~$ sudo netstat -nlp | grep :9000 tcp 0 0 0.0.0.0:9000 0.0.0.0:* LISTEN 16397/sshd tcp6 0 0 :::9000 :::* LISTEN 16397/sshd 

Desde la salida netstat , puede ver que el proceso está escuchando en la dirección 127.0.0.1

 tcp 0 0 127.0.0.1:9000 0.0.0.0:* ... 

del mensaje de excepción puede ver que intenta conectarse a la dirección 127.0.1.1

 java.net.ConnectException: Call From marta-komputer/127.0.1.1 to localhost:9000 failed ... 

más allá en la excepción es mentionend

 For more details see: http://wiki.apache.org/hadoop/ConnectionRefused 

en esta página encuentras

Compruebe que no haya una entrada para su nombre de host mapeado a 127.0.0.1 o 127.0.1.1 en / etc / hosts (Ubuntu es notorio por esto)

entonces la conclusión es eliminar esta línea en su /etc/hosts

 127.0.1.1 marta-komputer 

Tuve el prolem similar con OP. Como sugirió la salida del terminal, fui a http://wiki.apache.org/hadoop/ConnectionRefused

Traté de cambiar mi archivo / etc / hosts como se sugiere aquí, es decir, eliminar 127.0.1.1 ya que OP sugirió que creará otro error.

Entonces, al final, lo dejo tal como está. El siguiente es mi / etc / hosts

 127.0.0.1 localhost.localdomain localhost 127.0.1.1 linux # The following lines are desirable for IPv6 capable hosts ::1 ip6-localhost ip6-loopback fe00::0 ip6-localnet ff00::0 ip6-mcastprefix ff02::1 ip6-allnodes ff02::2 ip6-allrouters 

Al final, encontré que mi namenode no se inició correctamente, es decir, cuando escribe sudo netstat -lpten | grep java sudo netstat -lpten | grep java en el terminal, no habrá ningún proceso JVM ejecutándose (escuchando) en el puerto 9000.

Así que hice dos directorios para namenode y datanode respectivamente (si no lo has hecho). No tiene que poner donde lo puse, reemplácelo según su directorio hadoop. es decir

 mkdir -p /home/hadoopuser/hadoop-2.6.2/hdfs/namenode mkdir -p /home/hadoopuser/hadoop-2.6.2/hdfs/datanode 

He reconfigurado mi hdfs-site.xml .

   dfs.replication 1   dfs.namenode.name.dir file:/home/hadoopuser/hadoop-2.6.2/hdfs/namenode   dfs.datanode.data.dir file:/home/hadoopuser/hadoop-2.6.2/hdfs/datanode   

En la terminal, detenga sus archivos hdfs e hilera con la secuencia de comandos stop-dfs.sh y stop-yarn.sh . Están ubicados en su directorio hadoop / sbin. En mi caso, es /home/hadoopuser/hadoop-2.6.2/sbin/.

Luego, inicie su hdfs y hile con la secuencia de comandos start-dfs.sh y start-yarn.sh Después de que se haya iniciado, escriba jps en su terminal para ver si sus procesos de JVM se están ejecutando correctamente. Debería mostrar lo siguiente.

 15678 NodeManager 14982 NameNode 15347 SecondaryNameNode 23814 Jps 15119 DataNode 15548 ResourceManager 

Luego intente usar netstat nuevamente para ver si su namenode está escuchando el puerto 9000

 sudo netstat -lpten | grep java 

Si configuró correctamente el namenode, debería ver lo siguiente en la salida de su terminal.

tcp 0 0 127.0.0.1:9000 0.0.0.0:* LISTEN 1001 175157 14982/java

Luego intente escribir el comando hdfs dfs -mkdir /user/hadoopuser Si este comando se ejecuta con éxito, ahora puede hacer una lista de su directorio en el directorio de usuario HDFS mediante hdfs dfs -ls /user

Asegúrese de que HDFS esté en línea. Comience por $HADOOP_HOME/sbin/start-dfs.sh Una vez que lo haga, su prueba con telnet localhost 9001 debería funcionar.

Para mí fue que no pude agrupar mi cuidador del zoológico.

 hdfs haadmin -getServiceState 1 active hdfs haadmin -getServiceState 2 active 

Mi hadoop-hdfs-zkfc- [nombre de host] .log mostró:

2017-04-14 11: 46: 55,351 WARN org.apache.hadoop.ha.HealthMonitor: excepción de nivel de transporte que intenta supervisar el estado de NameNode en HOST / 192.168.1.55: 9000: java.net.ConnectException: conexión rechazada Llamar desde HOST / 192.168.1.55 a HOST: 9000 falló en la excepción de conexión: java.net.ConnectException: se rechazó la conexión; Para obtener más detalles, consulte: http://wiki.apache.org/hadoop/ConnectionRefused

solución:

 hdfs-site.xml  dfs.namenode.rpc-bind-host 0.0.0.0  

antes de

 netstat -plunt tcp 0 0 192.168.1.55:9000 0.0.0.0:* LISTEN 13133/java nmap localhost -p 9000 Starting Nmap 6.40 ( http://nmap.org ) at 2017-04-14 12:15 EDT Nmap scan report for localhost (127.0.0.1) Host is up (0.000047s latency). Other addresses for localhost (not scanned): 127.0.0.1 PORT STATE SERVICE 9000/tcp closed cslistener 

después

 netstat -plunt tcp 0 0 0.0.0.0:9000 0.0.0.0:* LISTEN 14372/java nmap localhost -p 9000 Starting Nmap 6.40 ( http://nmap.org ) at 2017-04-14 12:28 EDT Nmap scan report for localhost (127.0.0.1) Host is up (0.000039s latency). Other addresses for localhost (not scanned): 127.0.0.1 PORT STATE SERVICE 9000/tcp open cslistener 

Verifica tu configuración de firewall y establece

   fs.default.name hdfs://MachineName:9000  

reemplazar localhost por el nombre de la máquina

hduser @ marta-komputer: / usr / local / hadoop $ jps

11696 ResourceManager

11842 NodeManager

11171 NameNode

11523 SecondaryNameNode

12167 Jps

¿Dónde está tu DataNode? Connection refused problema de Connection refused también puede deberse a que no hay ningún DataNode activo. Verifique los registros del nodo de datos para conocer los problemas.

ACTUALIZADO:

Por este error:

15/03/01 00:59:34 INFO client.RMProxy: Conectarse a ResourceManager en /0.0.0.0:8032 java.net.ConnectException: Llamar desde marta-komputer.home / 192.168.1.8 a marta-komputer: error 9000 en excepción de conexión: java.net.ConnectException: conexión rechazada; Para obtener más detalles, consulte: http://wiki.apache.org/hadoop/ConnectionRefused

Agregue estas líneas en yarn-site.xml :

  yarn.resourcemanager.address 192.168.1.8:8032   yarn.resourcemanager.scheduler.address 192.168.1.8:8030   yarn.resourcemanager.resource-tracker.address 192.168.1.8:8031  

Reinicie los procesos de hadoop.

Tu problema es muy interesante. La configuración de Hadoop podría ser frustrante en algún momento debido a la complejidad del sistema y a muchas partes móviles involucradas. Creo que el problema al que te enfrentas es definitivamente uno de firewall. Mi cluster hadoop tiene una configuración similar. Con una regla de firewall agregada con un comando:

  sudo iptables -A INPUT -p tcp --dport 9000 -j REJECT 

Puedo ver el problema exacto:

 15/03/02 23:46:10 INFO client.RMProxy: Connecting to ResourceManager at /0.0.0.0:8032 java.net.ConnectException: Call From mybox/127.0.1.1 to localhost:9000 failed on connection exception: java.net.ConnectException: Connection refused; For more details see: http://wiki.apache.org/hadoop/ConnectionRefused at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) 

Puede verificar la configuración de su firewall con el comando:

 /usr/local/hadoop/etc$ sudo iptables -L Chain INPUT (policy ACCEPT) target prot opt source destination REJECT tcp -- anywhere anywhere tcp dpt:9000 reject-with icmp-port-unreachable Chain FORWARD (policy ACCEPT) target prot opt source destination Chain OUTPUT (policy ACCEPT) target prot opt source destination 

Una vez que se identifica la regla sospechosa, se puede eliminar con un comando como:

  sudo iptables -D INPUT -p tcp --dport 9000 -j REJECT 

Ahora, la conexión debería pasar.

En mi experiencia

 15/02/22 18:23:04 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable 

Puede tener una versión de sistema operativo de 64 bits y una instalación de hadoop de 32 bits. referir esto

 java.net.ConnectException: Call From marta-komputer/127.0.1.1 to localhost:9000 failed on connection exception: java.net.ConnectException: connection refused; For more details see: http://wiki.apache.org/hadoop/ConnectionRefused 

este problema se refiere a su autorización de clave pública ssh. por favor brinde detalles sobre su configuración ssh.

Por favor, consulte este enlace para verificar los pasos completos.

también proporciona información si

 cat $HOME/.ssh/authorized_keys 

devuelve cualquier resultado o no.

hdfs-site.xml el mismo problema al agregar esta propiedad a hdfs-site.xml

  fs.default.name hdfs://localhost:9000  

En / etc / hosts:

  1. Agregue esta línea:

su-dirección-IP su-nombre-host

ejemplo: 192.168.1.8 maestro

En / etc / hosts:

  1. Elimine la línea con 127.0.1.1 (Esto causará loopback)

  2. En su sitio principal, cambie localhost a su-ip o su-nombre de host

Ahora, reinicie el clúster.