Java 端口 9000 上的 hadoop 连接被拒绝
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时间：2020-08-12 00:29:33 来源:igfitidea点击:
hadoop connection refused on port 9000
提问by semaph0r
I want to setup a hadoop-cluster in pseudo-distributed mode for development. Trying to start the hadoop cluster fails due to refused connection on port 9000.
我想在伪分布式模式下设置一个 hadoop-cluster 进行开发。由于端口 9000 上的连接被拒绝，尝试启动 hadoop 集群失败。
These are my configs (pretty standard):
这些是我的配置（非常标准）：
site-core.xml:
站点核心.xml：
<?xml version="1.0"?>
<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>
<configuration>
<property>
<name>fs.default.name</name>
<value>hdfs://localhost:9000</value>
</property>
<property>
<name>hadoop.tmp.dir</name>
<value>~/hacking/hd-data/tmp</value>
</property>
<property>
<name>fs.checkpoint.dir</name>
<value>~/hacking/hd-data/snn</value>
</property>
</configuration>
hdfs-site.xml
hdfs-site.xml
<?xml version="1.0"?>
<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>
<configuration>
<property>
<name>dfs.replication</name>
<value>1</value>
</property>
<property>
<name>dfs.name.dir</name>
<value>~/hacking/hd-data/nn</value>
</property>
<property>
<name>dfs.data.dir</name>
<value>~/hacking/hd-data/dn</value>
</property>
<property>
<name>dfs.permissions.supergroup</name>
<value>hadoop</value>
</property>
</configuration>
haddop-env.sh- here I changed the config to IPv4 mode only (see last line):
haddop-env.sh- 在这里我只将配置更改为 IPv4 模式（见最后一行）：
# Set Hadoop-specific environment variables here.
# The only required environment variable is JAVA_HOME. All others are
# optional. When running a distributed configuration it is best to
# set JAVA_HOME in this file, so that it is correctly defined on
# remote nodes.
# The java implementation to use. Required.
export JAVA_HOME=/usr/lib/jvm/java-7-openjdk-amd64
# Extra Java CLASSPATH elements. Optional.
# export HADOOP_CLASSPATH=
# The maximum amount of heap to use, in MB. Default is 1000.
# export HADOOP_HEAPSIZE=2000
# Extra Java runtime options. Empty by default.
# export HADOOP_OPTS=-server
# Command specific options appended to HADOOP_OPTS when specified
export HADOOP_NAMENODE_OPTS="-Dcom.sun.management.jmxremote $HADOOP_NAMENODE_OPTS"
export HADOOP_SECONDARYNAMENODE_OPTS="-Dcom.sun.management.jmxremote $HADOOP_SECONDARYNAMENODE_OPTS"
export HADOOP_DATANODE_OPTS="-Dcom.sun.management.jmxremote $HADOOP_DATANODE_OPTS"
export HADOOP_BALANCER_OPTS="-Dcom.sun.management.jmxremote $HADOOP_BALANCER_OPTS"
export HADOOP_JOBTRACKER_OPTS="-Dcom.sun.management.jmxremote $HADOOP_JOBTRACKER_OPTS"
# export HADOOP_TASKTRACKER_OPTS=
# The following applies to multiple commands (fs, dfs, fsck, distcp etc)
# export HADOOP_CLIENT_OPTS
# Extra ssh options. Empty by default.
# export HADOOP_SSH_OPTS="-o ConnectTimeout=1 -o SendEnv=HADOOP_CONF_DIR"
# Where log files are stored. $HADOOP_HOME/logs by default.
# export HADOOP_LOG_DIR=${HADOOP_HOME}/logs
# File naming remote slave hosts. $HADOOP_HOME/conf/slaves by default.
# export HADOOP_SLAVES=${HADOOP_HOME}/conf/slaves
# host:path where hadoop code should be rsync'd from. Unset by default.
# export HADOOP_MASTER=master:/home/$USER/src/hadoop
# Seconds to sleep between slave commands. Unset by default. This
# can be useful in large clusters, where, e.g., slave rsyncs can
# otherwise arrive faster than the master can service them.
# export HADOOP_SLAVE_SLEEP=0.1
# The directory where pid files are stored. /tmp by default.
# export HADOOP_PID_DIR=/var/hadoop/pids
# A string representing this instance of hadoop. $USER by default.
# export HADOOP_IDENT_STRING=$USER
# The scheduling priority for daemon processes. See 'man nice'.
# export HADOOP_NICENESS=10
# Disabling IPv6 for HADOOP
export HADOOP_OPTS=-Djava.net.preferIPv4Stack=true
/etc/hosts:
/etc/hosts:
127.0.0.1 localhost zaphod
# 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
But at the beginning after calling ./start-dfs.shfollowing lines are in the log files:
但是在调用./start-dfs.sh以下行后的开头在日志文件中：
hadoop-pschmidt-datanode-zaphod.log
hadoop-pschmidt-datanode-zaphod.log
2013-08-19 21:21:59,430 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: STARTUP_MSG:
/************************************************************
STARTUP_MSG: Starting DataNode
STARTUP_MSG: host = zaphod/127.0.1.1
STARTUP_MSG: args = []
STARTUP_MSG: version = 0.20.204.0
STARTUP_MSG: build = git://hrt8n35.cc1.ygridcore.net/ on branch branch-0.20-security-204 -r 65e258bf0813ac2b15bb4c954660eaf9e8fba141; compiled by 'hortonow' on Thu Aug 25 23:25:52 UTC 2011
************************************************************/
2013-08-19 21:22:03,950 INFO org.apache.hadoop.metrics2.impl.MetricsConfig: loaded properties from hadoop-metrics2.properties
2013-08-19 21:22:04,052 INFO org.apache.hadoop.metrics2.impl.MetricsSourceAdapter: MBean for source MetricsSystem,sub=Stats registered.
2013-08-19 21:22:04,064 INFO org.apache.hadoop.metrics2.impl.MetricsSystemImpl: Scheduled snapshot period at 10 second(s).
2013-08-19 21:22:04,065 INFO org.apache.hadoop.metrics2.impl.MetricsSystemImpl: DataNode metrics system started
2013-08-19 21:22:07,054 INFO org.apache.hadoop.metrics2.impl.MetricsSourceAdapter: MBean for source ugi registered.
2013-08-19 21:22:07,060 WARN org.apache.hadoop.metrics2.impl.MetricsSystemImpl: Source name ugi already exists!
2013-08-19 21:22:08,709 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: localhost/127.0.0.1:9000. Already tried 0 time(s).
2013-08-19 21:22:09,710 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: localhost/127.0.0.1:9000. Already tried 1 time(s).
2013-08-19 21:22:10,711 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: localhost/127.0.0.1:9000. Already tried 2 time(s).
2013-08-19 21:22:11,712 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: localhost/127.0.0.1:9000. Already tried 3 time(s).
2013-08-19 21:22:12,712 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: localhost/127.0.0.1:9000. Already tried 4 time(s).
2013-08-19 21:22:13,713 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: localhost/127.0.0.1:9000. Already tried 5 time(s).
2013-08-19 21:22:14,714 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: localhost/127.0.0.1:9000. Already tried 6 time(s).
2013-08-19 21:22:15,714 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: localhost/127.0.0.1:9000. Already tried 7 time(s).
2013-08-19 21:22:16,715 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: localhost/127.0.0.1:9000. Already tried 8 time(s).
2013-08-19 21:22:17,716 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: localhost/127.0.0.1:9000. Already tried 9 time(s).
2013-08-19 21:22:17,717 INFO org.apache.hadoop.ipc.RPC: Server at localhost/127.0.0.1:9000 not available yet, Zzzzz...
hadoop-pschmidt-namenode-zaphod.log
hadoop-pschmidt-namenode-zaphod.log
2013-08-19 21:21:59,443 INFO org.apache.hadoop.hdfs.server.namenode.NameNode: STARTUP_MSG:
/************************************************************
STARTUP_MSG: Starting NameNode
STARTUP_MSG: host = zaphod/127.0.1.1
STARTUP_MSG: args = []
STARTUP_MSG: version = 0.20.204.0
STARTUP_MSG: build = git://hrt8n35.cc1.ygridcore.net/ on branch branch-0.20-security-204 -r 65e258bf0813ac2b15bb4c954660eaf9e8fba141; compiled by 'hortonow' on Thu Aug 25 23:25:52 UTC 2011
************************************************************/
2013-08-19 21:22:03,950 INFO org.apache.hadoop.metrics2.impl.MetricsConfig: loaded properties from hadoop-metrics2.properties
2013-08-19 21:22:04,052 INFO org.apache.hadoop.metrics2.impl.MetricsSourceAdapter: MBean for source MetricsSystem,sub=Stats registered.
2013-08-19 21:22:04,064 INFO org.apache.hadoop.metrics2.impl.MetricsSystemImpl: Scheduled snapshot period at 10 second(s).
2013-08-19 21:22:04,064 INFO org.apache.hadoop.metrics2.impl.MetricsSystemImpl: NameNode metrics system started
2013-08-19 21:22:06,050 INFO org.apache.hadoop.metrics2.impl.MetricsSourceAdapter: MBean for source ugi registered.
2013-08-19 21:22:06,056 WARN org.apache.hadoop.metrics2.impl.MetricsSystemImpl: Source name ugi already exists!
2013-08-19 21:22:06,095 INFO org.apache.hadoop.metrics2.impl.MetricsSourceAdapter: MBean for source jvm registered.
2013-08-19 21:22:06,097 INFO org.apache.hadoop.metrics2.impl.MetricsSourceAdapter: MBean for source NameNode registered.
2013-08-19 21:22:06,232 INFO org.apache.hadoop.hdfs.util.GSet: VM type = 64-bit
2013-08-19 21:22:06,234 INFO org.apache.hadoop.hdfs.util.GSet: 2% max memory = 17.77875 MB
2013-08-19 21:22:06,235 INFO org.apache.hadoop.hdfs.util.GSet: capacity = 2^21 = 2097152 entries
2013-08-19 21:22:06,235 INFO org.apache.hadoop.hdfs.util.GSet: recommended=2097152, actual=2097152
2013-08-19 21:22:06,748 INFO org.apache.hadoop.hdfs.server.namenode.FSNamesystem: fsOwner=pschmidt
2013-08-19 21:22:06,748 INFO org.apache.hadoop.hdfs.server.namenode.FSNamesystem: supergroup=hadoop
2013-08-19 21:22:06,748 INFO org.apache.hadoop.hdfs.server.namenode.FSNamesystem: isPermissionEnabled=true
2013-08-19 21:22:06,754 INFO org.apache.hadoop.hdfs.server.namenode.FSNamesystem: dfs.block.invalidate.limit=100
2013-08-19 21:22:06,768 INFO org.apache.hadoop.hdfs.server.namenode.FSNamesystem: isAccessTokenEnabled=false accessKeyUpdateInterval=0 min(s), accessTokenLifetime=0 min(s)
2013-08-19 21:22:07,262 INFO org.apache.hadoop.hdfs.server.namenode.FSNamesystem: Registered FSNamesystemStateMBean and NameNodeMXBean
2013-08-19 21:22:07,322 INFO org.apache.hadoop.hdfs.server.namenode.NameNode: Caching file names occuring more than 10 times
2013-08-19 21:22:07,326 INFO org.apache.hadoop.hdfs.server.common.Storage: Storage directory /home/pschmidt/hacking/hadoop-0.20.204.0/~/hacking/hd-data/nn does not exist.
2013-08-19 21:22:07,329 ERROR org.apache.hadoop.hdfs.server.namenode.FSNamesystem: FSNamesystem initialization failed.
org.apache.hadoop.hdfs.server.common.InconsistentFSStateException: Directory /home/pschmidt/hacking/hadoop-0.20.204.0/~/hacking/hd-data/nn is in an inconsistent state: storage directory does not exist or is not accessible.
at org.apache.hadoop.hdfs.server.namenode.FSImage.recoverTransitionRead(FSImage.java:291)
at org.apache.hadoop.hdfs.server.namenode.FSDirectory.loadFSImage(FSDirectory.java:97)
at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.initialize(FSNamesystem.java:379)
at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.<init>(FSNamesystem.java:353)
at org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(NameNode.java:254)
at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:434)
at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1153)
at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1162)
2013-08-19 21:22:07,331 ERROR org.apache.hadoop.hdfs.server.namenode.NameNode: org.apache.hadoop.hdfs.server.common.InconsistentFSStateException: Directory /home/pschmidt/hacking/hadoop-0.20.204.0/~/hacking/hd-data/nn is in an inconsistent state: storage directory does not exist or is not accessible.
at org.apache.hadoop.hdfs.server.namenode.FSImage.recoverTransitionRead(FSImage.java:291)
at org.apache.hadoop.hdfs.server.namenode.FSDirectory.loadFSImage(FSDirectory.java:97)
at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.initialize(FSNamesystem.java:379)
at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.<init>(FSNamesystem.java:353)
at org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(NameNode.java:254)
at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:434)
at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1153)
at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1162)
2013-08-19 21:22:07,332 INFO org.apache.hadoop.hdfs.server.namenode.NameNode: SHUTDOWN_MSG:
/************************************************************
SHUTDOWN_MSG: Shutting down NameNode at zaphod/127.0.1.1
************************************************************/
After reformatting the hdfs following output is displayed:
重新格式化 hdfs 后，将显示以下输出：
13/08/19 21:50:21 INFO namenode.NameNode: STARTUP_MSG:
/************************************************************
STARTUP_MSG: Starting NameNode
STARTUP_MSG: host = zaphod/127.0.0.1
STARTUP_MSG: args = [-format]
STARTUP_MSG: version = 0.20.204.0
STARTUP_MSG: build = git://hrt8n35.cc1.ygridcore.net/ on branch branch-0.20-security-204 -r 65e258bf0813ac2b15bb4c954660eaf9e8fba141; compiled by 'hortonow' on Thu Aug 25 23:25:52 UTC 2011
************************************************************/
Re-format filesystem in ~/hacking/hd-data/nn ? (Y or N) Y
13/08/19 21:50:26 INFO util.GSet: VM type = 64-bit
13/08/19 21:50:26 INFO util.GSet: 2% max memory = 17.77875 MB
13/08/19 21:50:26 INFO util.GSet: capacity = 2^21 = 2097152 entries
13/08/19 21:50:26 INFO util.GSet: recommended=2097152, actual=2097152
13/08/19 21:50:27 INFO namenode.FSNamesystem: fsOwner=pschmidt
13/08/19 21:50:27 INFO namenode.FSNamesystem: supergroup=hadoop
13/08/19 21:50:27 INFO namenode.FSNamesystem: isPermissionEnabled=true
13/08/19 21:50:27 INFO namenode.FSNamesystem: dfs.block.invalidate.limit=100
13/08/19 21:50:27 INFO namenode.FSNamesystem: isAccessTokenEnabled=false accessKeyUpdateInterval=0 min(s), accessTokenLifetime=0 min(s)
13/08/19 21:50:27 INFO namenode.NameNode: Caching file names occuring more than 10 times
13/08/19 21:50:27 INFO common.Storage: Image file of size 110 saved in 0 seconds.
13/08/19 21:50:28 INFO common.Storage: Storage directory ~/hacking/hd-data/nn has been successfully formatted.
13/08/19 21:50:28 INFO namenode.NameNode: SHUTDOWN_MSG:
/************************************************************
SHUTDOWN_MSG: Shutting down NameNode at zaphod/127.0.0.1
************************************************************/
Using netstat -lpten | grep java:
使用netstat -lpten | grep java：
tcp 0 0 0.0.0.0:50301 0.0.0.0:* LISTEN 1000 50995 9875/java
tcp 0 0 0.0.0.0:35471 0.0.0.0:* LISTEN 1000 51775 9639/java
tcp6 0 0 :::2181 :::* LISTEN 1000 20841 2659/java
tcp6 0 0 :::36743 :::* LISTEN 1000 20524 2659/java
Using netstat -lpten | grep 9000returns nothing, assuming that there is no application bound to this designated port after all.
Usingnetstat -lpten | grep 9000什么都不返回，假设毕竟没有应用程序绑定到这个指定端口。
What else can I look for to get my hdfs up and running. Don't hesitate to ask for further logs and config files.
我还能寻找什么来启动和运行我的 hdfs。不要犹豫，要求进一步的日志和配置文件。
Thanks in advance.
提前致谢。
采纳答案by techvineet
Use absolute path for this and make sure the hadoop user has permissions to access this directory:-
为此使用绝对路径并确保 hadoop 用户有权访问此目录：-
<property>
<name>dfs.data.dir</name>
<value>~/hacking/hd-data/dn</value>
</property>
also make sure you format this path like
还要确保你格式化这个路径
# hadoop namenode -format
回答by DevZer0
The short and sweet answer is that your node service is not running. simply do
简短而甜蜜的答案是您的节点服务没有运行。简单地做
$HADOOP_HOME/bin/hdfs
回答by Styne.John.
Try command.
试试命令。
telnet localhost 9000
If telnet command returns connection refused then start hadoop by:
如果 telnet 命令返回连接被拒绝，则通过以下方式启动 hadoop：
$HADOOP_HOME/sbin/start-dfs.sh
Then by running telnet again you can see the connection is estabilished
然后再次运行 telnet 可以看到连接已建立
回答by dinari amira
you have to do the following steps:
您必须执行以下步骤：
hdfs namenode -format
start-all.cmd
回答by Leon Qi
Modify the core-sit.xml from
修改 core-sit.xml 从
hdfs://localhost:9000
to
到
hdfs:// YOUR REAL MASTER IP ADDRESS:9000
e.g.
例如
hdfs://192.168.111.10:9000
works for me!
为我工作！
