Hebernate 一对多的数据获取(新手提问) - ITeye问答
private void getRoleModelList(){
user=this.userDAO.getUser(); //获取用户
modelList=new ArrayList();
Set&UserRole& userroles=user.getUserRoles();//获取用户的角色列表
Object[] userrole=userroles.toArray();
Model model=new Model();
for(int i=0;i&userrole.i++) //循环用户角色
Set&RoleModel& rolemodels=((UserRole)userrole[i]).getRole().getRoleModels(); //获取角色模块
Object[] rolemodel=rolemodels.toArray();
for(int j=0;j&rolemodel.j++)
model=modelDAO.findByid(((RoleModel)rolemodel[j]).getModel().getModelId().toString()); //根据角色模块中模块ID获取模块
modelList.add(model); //添加到模块列表
this.setSession("modelList",modelList);
我想问 下我这个方法写的有什么问题，为什么在 根据角色模块中模块ID获取模块 的时候循环几圈就会卡住不动。也不报错，有谁遇到过这种问题啊？问题补充没有人在吗？问题补充：问题已经解决。
改了一下方法
private void getRoleModelList(){
user=this.userDAO.getUser();
modelList=new ArrayList();
for (Iterator iter = user.getUserRoles().iterator(); iter.hasNext();) {
UserRole userrole = (UserRole) iter.next();
for(Iterator iterA=userrole.getRole().getRoleModels().iterator();iterA.hasNext();){
modelList.add(((RoleModel)iterA.next()).getModel());
}
&&&&&&& }
this.setSession("modelList",modelList);
谢谢各位的积极作答
modelDAO.findByid(((RoleModel)rolemodel[j]).getModel().getModelId().toString());
modelDAO.findByid()这个方法参数是什么类型的？
是否对参数为NULL时候进行处理！·
有，是不是().getModelId().toString()这错了，为什么还要加tostring。再说 getModeiId()得到的 id 是什么类型的，如果是int的 话，那加tostring就错了
循环几次不动了呀？每次尝试都是同样多次数就不动了吗？可不可能是数据库连接没了呀。。或者哪里阻塞死锁了呀。
已解决问题
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[驾乘心得]
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电脑公司部门经理
<em id="authorposton13-4-25 14:58
如题，是不是只有被交警现场逮到这样的情况下，才会扣分？
刚看到一条消息，南京48条重点道路违停的话，罚100块+扣3分。
这个要怎么实施呢？扣谁的3分？
声望0 精华0帖子八豆12598 积分21849注册时间最后登录
<em id="authorposton13-4-25 15:00
随便谁的三分 关键钱要交
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<em id="authorposton13-4-25 15:07
老新闻了 10日起南京48条重点道路违停贴黄单 罚100元记3分_新浪江苏新闻_新浪江苏
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柜台小老板
<em id="authorposton13-4-25 15:35
拿黄单子去的时候，你不是要带驾证吗？
电子拍的看代码，有的扣，有的不扣
租婚车找我，电话 微信同步！
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电脑公司部门经理
<em id="authorposton13-4-25 15:53
ltklove00 发表于
拿黄单子去的时候，你不是要带驾证吗？
电子拍的看代码，有的扣，有的不扣 ...
拿别的驾照去不是一样吗？我说我借给朋友开的。
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柜台小老板
<em id="authorposton13-4-25 15:55
justcode 发表于
拿别的驾照去不是一样吗？我说我借给朋友开的。
当然可以，反正又个本扣分就行，前提找个C照吧，不然年审要学习的
租婚车找我，电话 微信同步！
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珠江路上卖盒饭的
<em id="authorposton13-4-25 17:35
闯红灯扣6分是交警当场抓住在这样扣的吗？还是拍到就这样扣？上次听一个出租司机说两个交警当场抓住才是6分的，不知道真假
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柜台小老板
<em id="authorposton13-4-25 18:22
kevin21 发表于
闯红灯扣6分是交警当场抓住在这样扣的吗？还是拍到就这样扣？上次听一个出租司机说两个交警当场抓住才是6分 ...
现在抓到200元记6分，电子曝光200元不记分
租婚车找我，电话 微信同步！
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柜台小老板
<em id="authorposton13-4-26 12:20
违停扣分不需驾驶员在场，驾驶员在场还会给警察机会贴黄单？
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电脑公司部门经理
<em id="authorposton13-4-26 12:23
黄单是要扣3分的
这个需要去N大队处理,处理时,提供驾照等,然后扣这个人的分
再领罚款单去银行缴费
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<em id="authorposton13-4-26 14:04
justcode 发表于
拿别的驾照去不是一样吗？我说我借给朋友开的。
拿别人的驾照去不行，要驾照的持有人到场才行
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<em id="authorposton13-4-26 15:33
所以有一种驾照叫F照（分照）
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新手提问关于hadoop搭建时 namenode无法正常启动的问题
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我之前搭建了1.2.1版本的hadoop完全没有问题的集群成功了，后来换了2.6.0版本的hadoop，在解压修改了配置文件后，我尝试-format。
但是之后发现有shutdown message。jps之后发现namenode没有启动，尝试启动hdfs发现secondaryNameNode可以启动。
之后浏览器打开50070端口也不行。
-format信息如下，希望诸位大神帮我看看是哪里出了问题。我昨天花了接近5个小时还是没找出来问题，拜托啦！
[root@hadoop0 hadoop]# ./bin/hdfs namenode -format
16/05/06 22:11:07 INFO namenode.NameNode: STARTUP_MSG:
/************************************************************
STARTUP_MSG: Starting NameNode
STARTUP_MSG:& &host = hadoop0/192.168.81.129
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/curator-framework-2.6.0.jar:/usr/local/hadoop/share/hadoop/common/lib/jersey-server-1.9.jar:/usr/local/hadoop/share/hadoop/common/lib/hamcrest-core-1.3.jar:/usr/local/hadoop/share/hadoop/common/lib/junit-4.11.jar:/usr/local/hadoop/share/hadoop/common/lib/htrace-core-3.0.4.jar:/usr/local/hadoop/share/hadoop/common/lib/java-xmlbuilder-0.4.jar:/usr/local/hadoop/share/hadoop/common/lib/jsp-api-2.1.jar:/usr/local/hadoop/share/hadoop/common/lib/protobuf-java-2.5.0.jar:/usr/local/hadoop/share/hadoop/common/lib/api-asn1-api-1.0.0-M20.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-codec-1.4.jar:/usr/local/hadoop/share/hadoop/common/lib/jasper-runtime-5.5.23.jar:/usr/local/hadoop/share/hadoop/common/lib/curator-client-2.6.0.jar:/usr/local/hadoop/share/hadoop/common/lib/jsr305-1.3.9.jar:/usr/local/hadoop/share/hadoop/common/lib/slf4j-log4j12-1.7.5.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-httpclient-3.1.jar:/usr/local/hadoop/share/hadoop/common/lib/activation-1.1.jar:/usr/local/hadoop/share/hadoop/common/lib/jetty-6.1.26.jar:/usr/local/hadoop/share/hadoop/common/lib/jackson-jaxrs-1.9.13.jar:/usr/local/hadoop/share/hadoop/common/lib/xz-1.0.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-configuration-1.6.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-cli-1.2.jar:/usr/local/hadoop/share/hadoop/common/lib/snappy-java-1.0.4.1.jar:/usr/local/hadoop/share/hadoop/common/lib/jets3t-0.9.0.jar:/usr/local/hadoop/share/hadoop/common/lib/jackson-xc-1.9.13.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-compress-1.4.1.jar:/usr/local/hadoop/share/hadoop/common/lib/zookeeper-3.4.6.jar:/usr/local/hadoop/share/hadoop/common/lib/apacheds-i18n-2.0.0-M15.jar:/usr/local/hadoop/share/hadoop/common/lib/mockito-all-1.8.5.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-el-1.0.jar:/usr/local/hadoop/share/hadoop/common/lib/avro-1.7.4.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/hadoop-annotations-2.6.0.jar:/usr/local/hadoop/share/hadoop/common/lib/slf4j-api-1.7.5.jar:/usr/local/hadoop/share/hadoop/common/lib/gson-2.2.4.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-logging-1.1.3.jar:/usr/local/hadoop/share/hadoop/common/lib/netty-3.6.2.Final.jar:/usr/local/hadoop/share/hadoop/common/lib/jersey-json-1.9.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-net-3.1.jar:/usr/local/hadoop/share/hadoop/common/lib/jettison-1.1.jar:/usr/local/hadoop/share/hadoop/common/lib/asm-3.2.jar:/usr/local/hadoop/share/hadoop/common/lib/jsch-0.1.42.jar:/usr/local/hadoop/share/hadoop/common/lib/apacheds-kerberos-codec-2.0.0-M15.jar:/usr/local/hadoop/share/hadoop/common/lib/hadoop-auth-2.6.0.jar:/usr/local/hadoop/share/hadoop/common/lib/log4j-1.2.17.jar:/usr/local/hadoop/share/hadoop/common/lib/jackson-mapper-asl-1.9.13.jar:/usr/local/hadoop/share/hadoop/common/lib/stax-api-1.0-2.jar:/usr/local/hadoop/share/hadoop/common/lib/jasper-compiler-5.5.23.jar:/usr/local/hadoop/share/hadoop/common/lib/api-util-1.0.0-M20.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-lang-2.6.jar:/usr/local/hadoop/share/hadoop/common/lib/jaxb-impl-2.2.3-1.jar:/usr/local/hadoop/share/hadoop/common/lib/jetty-util-6.1.26.jar:/usr/local/hadoop/share/hadoop/common/lib/paranamer-2.3.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-math3-3.1.1.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-digester-1.8.jar:/usr/local/hadoop/share/hadoop/common/lib/guava-11.0.2.jar:/usr/local/hadoop/share/hadoop/common/lib/jackson-core-asl-1.9.13.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-beanutils-1.7.0.jar:/usr/local/hadoop/share/hadoop/common/lib/jersey-core-1.9.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-collections-3.2.1.jar:/usr/local/hadoop/share/hadoop/common/lib/httpcore-4.2.5.jar:/usr/local/hadoop/share/hadoop/common/lib/servlet-api-2.5.jar:/usr/local/hadoop/share/hadoop/common/lib/httpclient-4.2.5.jar:/usr/local/hadoop/share/hadoop/common/lib/jaxb-api-2.2.2.jar:/usr/local/hadoop/share/hadoop/common/lib/curator-recipes-2.6.0.jar:/usr/local/hadoop/share/hadoop/common/lib/commons-io-2.4.jar:/usr/local/hadoop/share/hadoop/common/hadoop-nfs-2.6.0.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/hdfs:/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/htrace-core-3.0.4.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/jsp-api-2.1.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/protobuf-java-2.5.0.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/commons-codec-1.4.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/jasper-runtime-5.5.23.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/jsr305-1.3.9.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/jetty-6.1.26.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/commons-cli-1.2.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/commons-el-1.0.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/xmlenc-0.52.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/commons-daemon-1.0.13.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/commons-logging-1.1.3.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/netty-3.6.2.Final.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/xercesImpl-2.9.1.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/asm-3.2.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/log4j-1.2.17.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/jackson-mapper-asl-1.9.13.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/commons-lang-2.6.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/jetty-util-6.1.26.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/guava-11.0.2.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/jackson-core-asl-1.9.13.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/jersey-core-1.9.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/servlet-api-2.5.jar:/usr/local/hadoop/share/hadoop/hdfs/lib/commons-io-2.4.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/share/hadoop/hdfs/hadoop-hdfs-nfs-2.6.0.jar:/usr/local/hadoop/share/hadoop/yarn/lib/jersey-server-1.9.jar:/usr/local/hadoop/share/hadoop/yarn/lib/jline-0.9.94.jar:/usr/local/hadoop/share/hadoop/yarn/lib/guice-servlet-3.0.jar:/usr/local/hadoop/share/hadoop/yarn/lib/javax.inject-1.jar:/usr/local/hadoop/share/hadoop/yarn/lib/protobuf-java-2.5.0.jar:/usr/local/hadoop/share/hadoop/yarn/lib/commons-codec-1.4.jar:/usr/local/hadoop/share/hadoop/yarn/lib/jsr305-1.3.9.jar:/usr/local/hadoop/share/hadoop/yarn/lib/commons-httpclient-3.1.jar:/usr/local/hadoop/share/hadoop/yarn/lib/activation-1.1.jar:/usr/local/hadoop/share/hadoop/yarn/lib/jetty-6.1.26.jar:/usr/local/hadoop/share/hadoop/yarn/lib/aopalliance-1.0.jar:/usr/local/hadoop/share/hadoop/yarn/lib/jackson-jaxrs-1.9.13.jar:/usr/local/hadoop/share/hadoop/yarn/lib/jersey-client-1.9.jar:/usr/local/hadoop/share/hadoop/yarn/lib/xz-1.0.jar:/usr/local/hadoop/share/hadoop/yarn/lib/commons-cli-1.2.jar:/usr/local/hadoop/share/hadoop/yarn/lib/jersey-guice-1.9.jar:/usr/local/hadoop/share/hadoop/yarn/lib/guice-3.0.jar:/usr/local/hadoop/share/hadoop/yarn/lib/jackson-xc-1.9.13.jar:/usr/local/hadoop/share/hadoop/yarn/lib/commons-compress-1.4.1.jar:/usr/local/hadoop/share/hadoop/yarn/lib/leveldbjni-all-1.8.jar:/usr/local/hadoop/share/hadoop/yarn/lib/zookeeper-3.4.6.jar:/usr/local/hadoop/share/hadoop/yarn/lib/commons-logging-1.1.3.jar:/usr/local/hadoop/share/hadoop/yarn/lib/netty-3.6.2.Final.jar:/usr/local/hadoop/share/hadoop/yarn/lib/jersey-json-1.9.jar:/usr/local/hadoop/share/hadoop/yarn/lib/jettison-1.1.jar:/usr/local/hadoop/share/hadoop/yarn/lib/asm-3.2.jar:/usr/local/hadoop/share/hadoop/yarn/lib/log4j-1.2.17.jar:/usr/local/hadoop/share/hadoop/yarn/lib/jackson-mapper-asl-1.9.13.jar:/usr/local/hadoop/share/hadoop/yarn/lib/stax-api-1.0-2.jar:/usr/local/hadoop/share/hadoop/yarn/lib/commons-lang-2.6.jar:/usr/local/hadoop/share/hadoop/yarn/lib/jaxb-impl-2.2.3-1.jar:/usr/local/hadoop/share/hadoop/yarn/lib/jetty-util-6.1.26.jar:/usr/local/hadoop/share/hadoop/yarn/lib/guava-11.0.2.jar:/usr/local/hadoop/share/hadoop/yarn/lib/jackson-core-asl-1.9.13.jar:/usr/local/hadoop/share/hadoop/yarn/lib/jersey-core-1.9.jar:/usr/local/hadoop/share/hadoop/yarn/lib/commons-collections-3.2.1.jar:/usr/local/hadoop/share/hadoop/yarn/lib/servlet-api-2.5.jar:/usr/local/hadoop/share/hadoop/yarn/lib/jaxb-api-2.2.2.jar:/usr/local/hadoop/share/hadoop/yarn/lib/commons-io-2.4.jar:/usr/local/hadoop/share/hadoop/yarn/hadoop-yarn-server-tests-2.6.0.jar:/usr/local/hadoop/share/hadoop/yarn/hadoop-yarn-server-resourcemanager-2.6.0.jar:/usr/local/hadoop/share/hadoop/yarn/hadoop-yarn-server-web-proxy-2.6.0.jar:/usr/local/hadoop/share/hadoop/yarn/hadoop-yarn-api-2.6.0.jar:/usr/local/hadoop/share/hadoop/yarn/hadoop-yarn-applications-unmanaged-am-launcher-2.6.0.jar:/usr/local/hadoop/share/hadoop/yarn/hadoop-yarn-server-common-2.6.0.jar:/usr/local/hadoop/share/hadoop/yarn/hadoop-yarn-applications-distributedshell-2.6.0.jar:/usr/local/hadoop/share/hadoop/yarn/hadoop-yarn-server-nodemanager-2.6.0.jar:/usr/local/hadoop/share/hadoop/yarn/hadoop-yarn-client-2.6.0.jar:/usr/local/hadoop/share/hadoop/yarn/hadoop-yarn-common-2.6.0.jar:/usr/local/hadoop/share/hadoop/yarn/hadoop-yarn-registry-2.6.0.jar:/usr/local/hadoop/share/hadoop/yarn/hadoop-yarn-server-applicationhistoryservice-2.6.0.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/jersey-server-1.9.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/hamcrest-core-1.3.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/junit-4.11.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/guice-servlet-3.0.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/javax.inject-1.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/protobuf-java-2.5.0.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/aopalliance-1.0.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/xz-1.0.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/snappy-java-1.0.4.1.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/jersey-guice-1.9.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/guice-3.0.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/commons-compress-1.4.1.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/leveldbjni-all-1.8.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/avro-1.7.4.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/hadoop-annotations-2.6.0.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/netty-3.6.2.Final.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/asm-3.2.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/log4j-1.2.17.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/jackson-mapper-asl-1.9.13.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/paranamer-2.3.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/jackson-core-asl-1.9.13.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/jersey-core-1.9.jar:/usr/local/hadoop/share/hadoop/mapreduce/lib/commons-io-2.4.jar:/usr/local/hadoop/share/hadoop/mapreduce/hadoop-mapreduce-client-hs-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-core-2.6.0.jar:/usr/local/hadoop/share/hadoop/mapreduce/hadoop-mapreduce-examples-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-app-2.6.0.jar:/usr/local/hadoop/share/hadoop/mapreduce/hadoop-mapreduce-client-jobclient-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/contrib/capacity-scheduler/*.jar
STARTUP_MSG:& &build =
-r e3496499ecb8d220fba99dc5ed4c99c8f9e33bb1; compiled by 'jenkins' on T21:10Z
STARTUP_MSG:& &java = 1.6.0_45
************************************************************/
16/05/06 22:11:07 INFO namenode.NameNode: registered UNIX signal handlers for [TERM, HUP, INT]
16/05/06 22:11:07 INFO namenode.NameNode: createNameNode [-format]
16/05/06 22:11:09 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
Formatting using clusterid: CID-f5-4882-89dc-ecf
16/05/06 22:11:10 INFO namenode.FSNamesystem: No KeyProvider found.
16/05/06 22:11:10 INFO namenode.FSNamesystem: fsLock is fair:true
16/05/06 22:11:10 INFO blockmanagement.DatanodeManager: dfs.block.invalidate.limit=1000
16/05/06 22:11:10 INFO blockmanagement.DatanodeManager: dfs.namenode.datanode.registration.ip-hostname-check=true
16/05/06 22:11:10 INFO blockmanagement.BlockManager: dfs.namenode.startup.delay.block.deletion.sec is set to 000:00:00:00.000
16/05/06 22:11:10 INFO blockmanagement.BlockManager: The block deletion will start around 2016 May 06 22:11:10
16/05/06 22:11:10 INFO util.GSet: Computing capacity for map BlocksMap
16/05/06 22:11:10 INFO util.GSet: VM type& && & = 32-bit
16/05/06 22:11:10 INFO util.GSet: 2.0% max memory 888.9 MB = 17.8 MB
16/05/06 22:11:10 INFO util.GSet: capacity& && &= 2^22 = 4194304 entries
16/05/06 22:11:10 INFO blockmanagement.BlockManager: dfs.block.access.token.enable=false
16/05/06 22:11:10 INFO blockmanagement.BlockManager: defaultReplication& && && &= 1
16/05/06 22:11:10 INFO blockmanagement.BlockManager: maxReplication& && && && & = 512
16/05/06 22:11:10 INFO blockmanagement.BlockManager: minReplication& && && && & = 1
16/05/06 22:11:10 INFO blockmanagement.BlockManager: maxReplicationStreams& && &= 2
16/05/06 22:11:10 INFO blockmanagement.BlockManager: shouldCheckForEnoughRacks&&= false
16/05/06 22:11:10 INFO blockmanagement.BlockManager: replicationRecheckInterval = 3000
16/05/06 22:11:10 INFO blockmanagement.BlockManager: encryptDataTransfer& && &&&= false
16/05/06 22:11:10 INFO blockmanagement.BlockManager: maxNumBlocksToLog& && && & = 1000
16/05/06 22:11:10 INFO namenode.FSNamesystem: fsOwner& && && && & = root (auth:SIMPLE)
16/05/06 22:11:10 INFO namenode.FSNamesystem: supergroup& && && & = supergroup
16/05/06 22:11:10 INFO namenode.FSNamesystem: isPermissionEnabled = true
16/05/06 22:11:10 INFO namenode.FSNamesystem: HA Enabled: false
16/05/06 22:11:10 INFO namenode.FSNamesystem: Append Enabled: true
16/05/06 22:11:11 INFO util.GSet: Computing capacity for map INodeMap
16/05/06 22:11:11 INFO util.GSet: VM type& && & = 32-bit
16/05/06 22:11:11 INFO util.GSet: 1.0% max memory 888.9 MB = 8.9 MB
16/05/06 22:11:11 INFO util.GSet: capacity& && &= 2^21 = 2097152 entries
16/05/06 22:11:11 INFO namenode.NameNode: Caching file names occuring more than 10 times
16/05/06 22:11:11 INFO util.GSet: Computing capacity for map cachedBlocks
16/05/06 22:11:11 INFO util.GSet: VM type& && & = 32-bit
16/05/06 22:11:11 INFO util.GSet: 0.25% max memory 888.9 MB = 2.2 MB
16/05/06 22:11:11 INFO util.GSet: capacity& && &= 2^19 = 524288 entries
16/05/06 22:11:11 INFO namenode.FSNamesystem: dfs.namenode.safemode.threshold-pct = 0.6033
16/05/06 22:11:11 INFO namenode.FSNamesystem: dfs.namenode.safemode.min.datanodes = 0
16/05/06 22:11:11 INFO namenode.FSNamesystem: dfs.namenode.safemode.extension& &&&= 30000
16/05/06 22:11:11 INFO namenode.FSNamesystem: Retry cache on namenode is enabled
16/05/06 22:11:11 INFO namenode.FSNamesystem: Retry cache will use 0.03 of total heap and retry cache entry expiry time is 600000 millis
16/05/06 22:11:11 INFO util.GSet: Computing capacity for map NameNodeRetryCache
16/05/06 22:11:11 INFO util.GSet: VM type& && & = 32-bit
16/05/06 22:11:11 INFO util.GSet: 0.447746% max memory 888.9 MB = 273.1 KB
16/05/06 22:11:11 INFO util.GSet: capacity& && &= 2^16 = 65536 entries
16/05/06 22:11:11 INFO namenode.NNConf: ACLs enabled? false
16/05/06 22:11:11 INFO namenode.NNConf: XAttrs enabled? true
16/05/06 22:11:11 INFO namenode.NNConf: Maximum size of an xattr: 16384
Re-format filesystem in Storage Directory /usr/local/hadoop/tmp/dfs/name ? (Y or N) Y
16/05/06 22:11:30 INFO namenode.FSImage: Allocated new BlockPoolId: BP--192.168.81.129-9
16/05/06 22:11:30 INFO common.Storage: Storage directory /usr/local/hadoop/tmp/dfs/name has been successfully formatted.
16/05/06 22:11:30 INFO namenode.NNStorageRetentionManager: Going to retain 1 images with txid &= 0
16/05/06 22:11:30 INFO util.ExitUtil: Exiting with status 0
16/05/06 22:11:30 INFO namenode.NameNode: SHUTDOWN_MSG:
/************************************************************
SHUTDOWN_MSG: Shutting down NameNode at hadoop0/192.168.81.129
************************************************************/
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16/05/06 22:11:30 INFO common.Storage: Storage directory /usr/local/hadoop/tmp/dfs/name has been successfully formatted.
已经成功了
其它没有成功，你看下日志
配置方面楼主可参考这个
hadoop（2.x）以hadoop2.2为例完全分布式最新高可靠安装文档
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磁盘空间呢？
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谢谢各位我已经把hadoop搭建起来了。namenode这个问题后来是发现因为我改了几次设置后重复-format格式化了namenode 导致namenode的ID变了 但是datanode的ID是不变的。我用datanode的ID覆盖了namenode的ID之后，集群就成功的启动了
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