Hadoop无法格式化namenode-java.lang.NullPointerException

有关我的安装的一些详细信息：

• Ubuntu 14.04 LTS 64位
• Oracle Java JDK 1.8.0_40
• Hadoop 2.6.0

我一直按照中的说明安装Hadoop。一切都很好，直到我必须格式化namenode为止

运行

$hadoop namenode-format

时，出现以下错误：

DEPRECATED: Use of this script to execute hdfs command is deprecated.
Instead use the hdfs command for it.

15/04/12 19:01:02 INFO namenode.NameNode: STARTUP_MSG: 
/************************************************************
STARTUP_MSG: Starting NameNode
STARTUP_MSG:   host = iulian-ThinkPad-T530/127.0.1.1
STARTUP_MSG:   args = [-format]
STARTUP_MSG:   version = 2.6.0
STARTUP_MSG:   classpath = /usr/local/hadoop-2.6.0/etc/hadoop:/usr/local/hadoop/share/hadoop/common/lib/jackson-core-asl-1.9.13.jar:/usr/local/hadoop/share/hadoop/common/lib/xz-1.0.jar:/usr/local/hadoop/share/hadoop/common/lib/paranamer-2.3.jar:/usr/local/hadoop/share/hadoop/common/lib/jsr305-1.3.9.jar:/usr/local/hadoop/share/hadoop/common/lib/snappy-java-1.0.4.1.jar:/usr/local/hadoop/share/hadoop/common/lib/api-util-1.0.0-M20.jar:/usr/local/hadoop/share/hadoop/common/lib/jaxb-api-2.2.2.jar:/usr/local/hadoop/share/hadoop/common/lib/netty-3.6.2.Final.jar:/usr/local/hadoop/share/hadoop/common/lib/jaxb-impl-2.2.3-1.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-digester-1.8.jar:/usr/local/hadoop/share/hadoop/common/lib/slf4j-api-1.7.5.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-io-2.4.jar:/usr/local/hadoop/share/hadoop/common/lib/jersey-core-1.9.jar:/usr/local/hadoop/share/hadoop/common/lib/jets3t-0.9.0.jar:/usr/local/hadoop/share/hadoop/common/lib/hadoop-annotations-2.6.0.jar:/usr/local/hadoop/share/hadoop/common/lib/jetty-6.1.26.jar:/usr/local/hadoop/share/hadoop/common/lib/jetty-util-6.1.26.jar:/usr/local/hadoop/share/hadoop/common/lib/curator-recipes-2.6.0.jar:/usr/local/hadoop/share/hadoop/common/lib/java-xmlbuilder-0.4.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-codec-1.4.jar:/usr/local/hadoop/share/hadoop/common/lib/jackson-jaxrs-1.9.13.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-logging-1.1.3.jar:/usr/local/hadoop/share/hadoop/common/lib/apacheds-kerberos-codec-2.0.0-M15.jar:/usr/local/hadoop/share/hadoop/common/lib/junit-4.11.jar:/usr/local/hadoop/share/hadoop/common/lib/jsch-0.1.42.jar:/usr/local/hadoop/share/hadoop/common/lib/asm-3.2.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-httpclient-3.1.jar:/usr/local/hadoop/share/hadoop/common/lib/hadoop-auth-2.6.0.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-compress-1.4.1.jar:/usr/local/hadoop/share/hadoop/common/lib/guava-11.0.2.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-net-3.1.jar:/usr/local/hadoop/share/hadoop/common/lib/mockito-all-1.8.5.jar:/usr/local/hadoop/share/hadoop/common/lib/jackson-mapper-asl-1.9.13.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-collections-3.2.1.jar:/usr/local/hadoop/share/hadoop/common/lib/log4j-1.2.17.jar:/usr/local/hadoop/share/hadoop/common/lib/curator-framework-2.6.0.jar:/usr/local/hadoop/share/hadoop/common/lib/activation-1.1.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-configuration-1.6.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-lang-2.6.jar:/usr/local/hadoop/share/hadoop/common/lib/apacheds-i18n-2.0.0-M15.jar:/usr/local/hadoop/share/hadoop/common/lib/jettison-1.1.jar:/usr/local/hadoop/share/hadoop/common/lib/jasper-compiler-5.5.23.jar:/usr/local/hadoop/share/hadoop/common/lib/zookeeper-3.4.6.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-cli-1.2.jar:/usr/local/hadoop/share/hadoop/common/lib/jersey-json-1.9.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-beanutils-core-1.8.0.jar:/usr/local/hadoop/share/hadoop/common/lib/xmlenc-0.52.jar:/usr/local/hadoop/share/hadoop/common/lib/protobuf-java-2.5.0.jar:/usr/local/hadoop/share/hadoop/common/lib/jsp-api-2.1.jar:/usr/local/hadoop/share/hadoop/common/lib/httpcore-4.2.5.jar:/usr/local/hadoop/share/hadoop/common/lib/api-asn1-api-1.0.0-M20.jar:/usr/local/hadoop/share/hadoop/common/lib/slf4j-log4j12-1.7.5.jar:/usr/local/hadoop/share/hadoop/common/lib/servlet-api-2.5.jar:/usr/local/hadoop/share/hadoop/common/lib/jersey-server-1.9.jar:/usr/local/hadoop/share/hadoop/common/lib/gson-2.2.4.jar:/usr/local/hadoop/share/hadoop/common/lib/httpclient-4.2.5.jar:/usr/local/hadoop/share/hadoop/common/lib/avro-1.7.4.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-el-1.0.jar:/usr/local/hadoop/share/hadoop/common/lib/jackson-xc-1.9.13.jar:/usr/local/hadoop/share/hadoop/common/lib/stax-api-1.0-2.jar:/usr/local/hadoop/share/hadoop/common/lib/curator-client-2.6.0.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-beanutils-1.7.0.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-math3-3.1.1.jar:/usr/local/hadoop/share/hadoop/common/lib/hamcrest-core-1.3.jar:/usr/local/hadoop/share/hadoop/common/lib/htrace-core-3.0.4.jar:/usr/local/hadoop/share/hadoop/common/lib/jasper-runtime-5.5.23.jar:/usr/local/hadoop/share/hadoop/common/hadoop-common-2.6.0-tests.jar:/usr/local/hadoop/share/hadoop/common/hadoop-common-2.6.0.jar:/usr/local/hadoop/share/hadoop/common/hadoop-nfs-2.6.0.jar:/usr/local/hadoop/share/hadoop/hdfs:/usr/local/hadoop/share/hadoop/hdfs/lib/jackson-core-asl-1.9.13.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/jsr305-1.3.9.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/netty-3.6.2.Final.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/commons-io-2.4.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/jersey-core-1.9.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/jetty-6.1.26.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/jetty-util-6.1.26.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/commons-codec-1.4.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/xercesImpl-2.9.1.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/commons-logging-1.1.3.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/asm-3.2.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/guava-11.0.2.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/jackson-mapper-asl-1.9.13.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/log4j-1.2.17.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/commons-lang-2.6.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/commons-cli-1.2.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/xmlenc-0.52.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/protobuf-java-2.5.0.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/jsp-api-2.1.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/servlet-api-2.5.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/jersey-server-1.9.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/xml-apis-1.3.04.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/commons-daemon-1.0.13.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/commons-el-1.0.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/htrace-core-3.0.4.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/jasper-runtime-5.5.23.jar:/usr/local/hadoop/share/hadoop/hdfs/hadoop-hdfs-nfs-2.6.0.jar:/usr/local/hadoop/share/hadoop/hdfs/hadoop-hdfs-2.6.0.jar:/usr/local/hadoop/share/hadoop/hdfs/hadoop-hdfs-2.6.0-tests.jar:/usr/local/hadoop-2.6.0/share/hadoop/yarn/lib/jackson-core-asl-1.9.13.jar:/usr/local/hadoop-2.6.0/share/hadoop/yarn/lib/xz-1.0.jar:/usr/local/hadoop-2.6.0/share/hadoop/yarn/lib/guice-3.0.jar:/usr/local/hadoop-2.6.0/share/hadoop/yarn/lib/jsr305-1.3.9.jar:/usr/local/hadoop-2.6.0/share/hadoop/yarn/lib/jaxb-api-2.2.2.jar:/usr/local/hadoop-2.6.0/share/hadoop/yarn/lib/jersey-client-1.9.jar:/usr/local/hadoop-2.6.0/share/hadoop/yarn/lib/netty-3.6.2.Final.jar:/usr/local/hadoop-2.6.0/share/hadoop/yarn/lib/jaxb-impl-2.2.3-1.jar:/usr/local/hadoop-2.6.0/share/hadoop/yarn/lib/commons-io-2.4.jar:/usr/local/hadoop-2.6.0/share/hadoop/yarn/lib/jersey-core-1.9.jar:/usr/local/hadoop-2.6.0/share/hadoop/yarn/lib/jetty-6.1.26.jar:/usr/local/hadoop-2.6.0/share/hadoop/yarn/lib/jetty-util-6.1.26.jar:/usr/local/hadoop-2.6.0/share/hadoop/yarn/lib/javax.inject-1.jar:/usr/local/hadoop-2.6.0/share/hadoop/yarn/lib/commons-codec-1.4.jar:/usr/local/hadoop-2.6.0/share/hadoop/yarn/lib/jackson-jaxrs-1.9.13.jar:/usr/local/hadoop-2.6.0/share/hadoop/yarn/lib/commons-logging-1.1.3.jar:/usr/local/hadoop-2.6.0/share/hadoop/yarn/lib/leveldbjni-all-1.8.jar:/usr/local/hadoop-2.6.0/share/hadoop/yarn/lib/asm-3.2.jar:/usr/local/hadoop-2.6.0/share/hadoop/yarn/lib/commons-httpclient-3.1.jar:/usr/local/hadoop-2.6.0/share/hadoop/yarn/lib/commons-compress-1.4.1.jar:/usr/local/hadoop-2.6.0/share/hadoop/yarn/lib/guava-11.0.2.jar:/usr/local/hadoop-2.6.0/share/hadoop/yarn/lib/jackson-mapper-asl-1.9.13.jar:/usr/local/hadoop-2.6.0/share/hadoop/yarn/lib/commons-collections-3.2.1.jar:/usr/local/hadoop-2.6.0/share/hadoop/yarn/lib/guice-servlet-3.0.jar:/usr/local/hadoop-2.6.0/share/hadoop/yarn/lib/log4j-1.2.17.jar:/usr/local/hadoop-2.6.0/share/hadoop/yarn/lib/activation-1.1.jar:/usr/local/hadoop-2.6.0/share/hadoop/yarn/lib/commons-lang-2.6.jar:/usr/local/hadoop-2.6.0/share/hadoop/yarn/lib/jettison-1.1.jar:/usr/local/hadoop-2.6.0/share/hadoop/yarn/lib/zookeeper-3.4.6.jar:/usr/local/hadoop-2.6.0/share/hadoop/yarn/lib/commons-cli-1.2.jar:/usr/local/hadoop-2.6.0/share/hadoop/yarn/lib/jersey-json-1.9.jar:/usr/local/hadoop-2.6.0/share/hadoop/yarn/lib/protobuf-java-2.5.0.jar:/usr/local/hadoop-2.6.0/share/hadoop/yarn/lib/servlet-api-2.5.jar:/usr/local/hadoop-2.6.0/share/hadoop/yarn/lib/jersey-server-1.9.jar:/usr/local/hadoop-2.6.0/share/hadoop/yarn/lib/jline-0.9.94.jar:/usr/local/hadoop-2.6.0/share/hadoop/yarn/lib/jackson-xc-1.9.13.jar:/usr/local/hadoop-2.6.0/share/hadoop/yarn/lib/stax-api-1.0-2.jar:/usr/local/hadoop-2.6.0/share/hadoop/yarn/lib/aopalliance-1.0.jar:/usr/local/hadoop-2.6.0/share/hadoop/yarn/lib/jersey-guice-1.9.jar:/usr/local/hadoop-2.6.0/share/hadoop/yarn/hadoop-yarn-server-common-2.6.0.jar:/usr/local/hadoop-2.6.0/share/hadoop/yarn/hadoop-yarn-registry-2.6.0.jar:/usr/local/hadoop-2.6.0/share/hadoop/yarn/hadoop-yarn-server-nodemanager-2.6.0.jar:/usr/local/hadoop-2.6.0/share/hadoop/yarn/hadoop-yarn-common-2.6.0.jar:/usr/local/hadoop-2.6.0/share/hadoop/yarn/hadoop-yarn-server-web-proxy-2.6.0.jar:/usr/local/hadoop-2.6.0/share/hadoop/yarn/hadoop-yarn-server-resourcemanager-2.6.0.jar:/usr/local/hadoop-2.6.0/share/hadoop/yarn/hadoop-yarn-server-tests-2.6.0.jar:/usr/local/hadoop-2.6.0/share/hadoop/yarn/hadoop-yarn-api-2.6.0.jar:/usr/local/hadoop-2.6.0/share/hadoop/yarn/hadoop-yarn-applications-distributedshell-2.6.0.jar:/usr/local/hadoop-2.6.0/share/hadoop/yarn/hadoop-yarn-server-applicationhistoryservice-2.6.0.jar:/usr/local/hadoop-2.6.0/share/hadoop/yarn/hadoop-yarn-applications-unmanaged-am-launcher-2.6.0.jar:/usr/local/hadoop-2.6.0/share/hadoop/yarn/hadoop-yarn-client-2.6.0.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/jackson-core-asl-1.9.13.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/xz-1.0.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/paranamer-2.3.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/guice-3.0.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/snappy-java-1.0.4.1.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/netty-3.6.2.Final.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/commons-io-2.4.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/jersey-core-1.9.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/hadoop-annotations-2.6.0.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/javax.inject-1.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/leveldbjni-all-1.8.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/junit-4.11.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/asm-3.2.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/commons-compress-1.4.1.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/jackson-mapper-asl-1.9.13.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/guice-servlet-3.0.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/log4j-1.2.17.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/protobuf-java-2.5.0.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/jersey-server-1.9.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/avro-1.7.4.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/hamcrest-core-1.3.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/aopalliance-1.0.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/jersey-guice-1.9.jar:/usr/local/hadoop/share/hadoop/mapreduce/hadoop-mapreduce-client-jobclient-2.6.0.jar:/usr/local/hadoop/share/hadoop/mapreduce/hadoop-mapreduce-client-core-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-jobclient-2.6.0-tests.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/share/hadoop/mapreduce/hadoop-mapreduce-client-hs-plugins-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-examples-2.6.0.jar:/contrib/capacity-scheduler/*.jar:/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_40
************************************************************/
15/04/12 19:01:02 INFO namenode.NameNode: registered UNIX signal handlers for [TERM, HUP, INT]
15/04/12 19:01:02 INFO namenode.NameNode: createNameNode [-format]
15/04/12 19:01:03 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
Formatting using clusterid: CID-72fe7fe8-d67b-481e-8288-9f835727d80a
15/04/12 19:01:03 FATAL namenode.NameNode: Failed to start namenode.
java.lang.NullPointerException
    at java.io.File.<init>(File.java:277)
    at org.apache.hadoop.hdfs.server.namenode.NNStorage.setStorageDirectories(NNStorage.java:305)
    at org.apache.hadoop.hdfs.server.namenode.NNStorage.<init>(NNStorage.java:166)
    at org.apache.hadoop.hdfs.server.namenode.FSImage.<init>(FSImage.java:127)
    at org.apache.hadoop.hdfs.server.namenode.NameNode.format(NameNode.java:932)
    at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1379)
    at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1504)
15/04/12 19:01:03 INFO util.ExitUtil: Exiting with status 1
15/04/12 19:01:03 INFO namenode.NameNode: SHUTDOWN_MSG: 
/************************************************************
SHUTDOWN_MSG: Shutting down NameNode at iulian-ThinkPad-T530/127.0.1.1
************************************************************/

---

如果在hdfs-site.xml中缺少dfs.namenode.name.dir属性，就会发生这种情况

请确保它存在，作为“值”提供的目录是有效的

例如：

dfs.namenode.name.dir
/数据/名称节点

format命令明确指出namenode存储目录中存在错误。检查namenode目录是否存在，是否分配了正确的权限。接下来检查hdfs-site.xml是否为dfs.namenode.name.dir属性设置了正确的值。

是否可以更新配置文件？当您尝试重新格式化时，群集是否处于活动状态？我更新了配置文件，在更改配置文件后重新启动了计算机。集群不应该处于活动状态（所有内容都是新安装的）-如何准确地检查这一点？目前这是在一台机器上运行的，我只是在我的机器上尝试一些东西。请您更新namenode日志，以便我们能够完整地查看问题，我更新了完整的日志。我能找到其他可能有用的日志（某个地方的日志文件）吗？我发现了问题所在，hdfs-site.xml文件中有一个输入错误

#HADOOP VARIABLES
export JAVA_HOME=/usr/local/jdk1.8.0_40
export HADOOP_INSTALL=/usr/local/hadoop 
export PATH=$PATH:$HADOOP_INSTALL/bin 
export PATH=$PATH:$HADOOP_INSTALL/sbin 
export HADOOP_MAPRED_HOME=$HADOOP_INSTALL 
export HADOOP_COMMON_HOME=$HADOOP_INSTALL 
export HADOOP_HDFS_HOME=$HADOOP_INSTALL 
export YARN_HOME=$HADOOP_INSTALL 
export HADOOP_COMMON_LIB_NATIVE_DIR=$HADOOP_INSTALL/lib/native 
export HADOOP_OPTS="-Djava.library.path=$HADOOP_INSTALL/lib"