平台：centos-6.3-i386
jdk-7u51
storm 0.9.1
python 2.6.6
hadoop 1.2.1
启动storm的时候，遇到这个问题，百度之后，看到大家的解决方案是在 nimbus.host: "master"前加上空格，但是，我的已经加上空格。还是出错。
后来，google到外国网址。然后下载了纯净版的storm.yaml，替换之后，重新配置，就搞定了。
外国网址：https://groups.google.com/forum/#!topic/storm-user/o7Xx6Oa_XKI
以及storm.yaml文件：链接: http://pan.baidu.com/s/1kVDEa5T 密码: hfyc
重要说明：文件最后一行，少打了一个空格。
下边是百度到上别人的方法：
1 # Licensed to the Apache Software Foundation (ASF) under one 2 # or more contributor license agreements. See the NOTICE file 3 # distributed with this work for additional information 4 # regarding copyright ownership. The ASF licenses this file 5 # to you under the Apache License, Version 2.0 (the 6 # "License"); you may not use this file except in compliance 7 # with the License. You may obtain a copy of the License at 8 # 9 # http://www.apache.org/licenses/LICENSE-2.0 10 # 11 # Unless required by applicable law or agreed to in writing, software 12 # distributed under the License is distributed on an "AS IS" BASIS, 13 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 # See the License for the specific language governing permissions and 15 # limitations under the License. 16 17 ########### These MUST be filled in for a storm configuration 18 # storm.zookeeper.servers: 19 - "master" 20 - "slave1" 21 - "slave2" 22 # 23 nimbus.host: "master" 24 storm.local.dir: "/home/hadoop/apache-storm-0.9.1-incubating/data" 25 supervisor.slots.ports: 26 - 6700 27 - 6701 28 - 6702 29 - 6703 30 # 31 # 32 # ##### These may optionally be filled in: 33 # 34 ## List of custom serializations 35 # topology.kryo.register: 36 # - org.mycompany.MyType 37 # - org.mycompany.MyType2: org.mycompany.MyType2Serializer 38 # 39 ## List of custom kryo decorators 40 # topology.kryo.decorators: 41 # - org.mycompany.MyDecorator 42 # 43 ## Locations of the drpc servers 44 # drpc.servers: 45 # - "server1" 46 # - "server2" 47 48 ## Metrics Consumers 49 # topology.metrics.consumer.register: 50 # - class: "backtype.storm.metrics.LoggingMetricsConsumer" 51 # parallelism.hint: 1 52 # - class: "org.mycompany.MyMetricsConsumer" 53 # parallelism.hint: 1 54 # argument: 55 # - endpoint: "metrics-collector.mycompany.org"
启动 storm nimbus &
1 Exception in thread "main" expected '<document start>', but found BlockMappingStart 2 in 'reader', line 23, column 2: 3 nimbus.host: "master" 4 ^ 5 6 at org.yaml.snakeyaml.parser.ParserImpl$ParseDocumentStart.produce(ParserImpl.java:225) 7 at org.yaml.snakeyaml.parser.ParserImpl.peekEvent(ParserImpl.java:158) 8 at org.yaml.snakeyaml.parser.ParserImpl.checkEvent(ParserImpl.java:143) 9 at org.yaml.snakeyaml.composer.Composer.getSingleNode(Composer.java:108) 10 at org.yaml.snakeyaml.constructor.BaseConstructor.getSingleData(BaseConstructor.java:120) 11 at org.yaml.snakeyaml.Yaml.loadFromReader(Yaml.java:481) 12 at org.yaml.snakeyaml.Yaml.load(Yaml.java:424) 13 at backtype.storm.utils.Utils.findAndReadConfigFile(Utils.java:138) 14 at backtype.storm.utils.Utils.readStormConfig(Utils.java:178) 15 at backtype.storm.config$read_storm_config.invoke(config.clj:116) 16 at backtype.storm.command.config_value$_main.invoke(config_value.clj:22) 17 at clojure.lang.AFn.applyToHelper(AFn.java:161) 18 at clojure.lang.AFn.applyTo(AFn.java:151) 19 at backtype.storm.command.config_value.main(Unknown Source) 20 Exception in thread "main" expected '<document start>', but found BlockMappingStart 21 in 'reader', line 23, column 2: 22 nimbus.host: "master" 23 ^ 24 25 at org.yaml.snakeyaml.parser.ParserImpl$ParseDocumentStart.produce(ParserImpl.java:225) 26 at org.yaml.snakeyaml.parser.ParserImpl.peekEvent(ParserImpl.java:158) 27 at org.yaml.snakeyaml.parser.ParserImpl.checkEvent(ParserImpl.java:143) 28 at org.yaml.snakeyaml.composer.Composer.getSingleNode(Composer.java:108) 29 at org.yaml.snakeyaml.constructor.BaseConstructor.getSingleData(BaseConstructor.java:120) 30 at org.yaml.snakeyaml.Yaml.loadFromReader(Yaml.java:481) 31 at org.yaml.snakeyaml.Yaml.load(Yaml.java:424) 32 at backtype.storm.utils.Utils.findAndReadConfigFile(Utils.java:138) 33 at backtype.storm.utils.Utils.readStormConfig(Utils.java:178) 34 at backtype.storm.config$read_storm_config.invoke(config.clj:116) 35 at backtype.storm.command.config_value$_main.invoke(config_value.clj:22) 36 at clojure.lang.AFn.applyToHelper(AFn.java:161) 37 at clojure.lang.AFn.applyTo(AFn.java:151) 38 at backtype.storm.command.config_value.main(Unknown Source) 39 Running: java -server -Dstorm.options= -Dstorm.home=/home/hadoop/apache-storm-0.9.1-incubating -Djava.library.path= -Dstorm.conf.file= -cp /home/hadoop/apache-storm-0.9.1-incubating/lib/ring-core-1.1.5.jar:/home/hadoop/apache-storm-0.9.1-incubating/lib/tools.cli-0.2.2.jar:/home/hadoop/apache-storm-0.9.1-incubating/lib/compojure-1.1.3.jar:/home/hadoop/apache-storm-0.9.1-incubating/lib/jgrapht-core-0.9.0.jar:/home/hadoop/apache-storm-0.9.1-incubating/lib/json-simple-1.1.jar:/home/hadoop/apache-storm-0.9.1-incubating/lib/commons-io-1.4.jar:/home/hadoop/apache-storm-0.9.1-incubating/lib/objenesis-1.2.jar:/home/hadoop/apache-storm-0.9.1-incubating/lib/servlet-api-2.5.jar:/home/hadoop/apache-storm-0.9.1-incubating/lib/ring-servlet-0.3.11.jar:/home/hadoop/apache-storm-0.9.1-incubating/lib/httpclient-4.1.1.jar:/home/hadoop/apache-storm-0.9.1-incubating/lib/clout-1.0.1.jar:/home/hadoop/apache-storm-0.9.1-incubating/lib/disruptor-2.10.1.jar:/home/hadoop/apache-storm-0.9.1-incubating/lib/commons-fileupload-1.2.1.jar:/home/hadoop/apache-storm-0.9.1-incubating/lib/ring-jetty-adapter-0.3.11.jar:/home/hadoop/apache-storm-0.9.1-incubating/lib/curator-client-1.0.1.jar:/home/hadoop/apache-storm-0.9.1-incubating/lib/netty-3.6.3.Final.jar:/home/hadoop/apache-storm-0.9.1-incubating/lib/meat-locker-0.3.1.jar:/home/hadoop/apache-storm-0.9.1-incubating/lib/clj-time-0.4.1.jar:/home/hadoop/apache-storm-0.9.1-incubating/lib/commons-codec-1.4.jar:/home/hadoop/apache-storm-0.9.1-incubating/lib/slf4j-api-1.6.5.jar:/home/hadoop/apache-storm-0.9.1-incubating/lib/clojure-1.4.0.jar:/home/hadoop/apache-storm-0.9.1-incubating/lib/joda-time-2.0.jar:/home/hadoop/apache-storm-0.9.1-incubating/lib/commons-lang-2.5.jar:/home/hadoop/apache-storm-0.9.1-incubating/lib/kryo-2.17.jar:/home/hadoop/apache-storm-0.9.1-incubating/lib/commons-logging-1.1.1.jar:/home/hadoop/apache-storm-0.9.1-incubating/lib/carbonite-1.3.2.jar:/home/hadoop/apache-storm-0.9.1-incubating/lib/tools.macro-0.1.0.jar:/home/hadoop/apache-storm-0.9.1-incubating/lib/clj-stacktrace-0.2.4.jar:/home/hadoop/apache-storm-0.9.1-incubating/lib/log4j-over-slf4j-1.6.6.jar:/home/hadoop/apache-storm-0.9.1-incubating/lib/commons-exec-1.1.jar:/home/hadoop/apache-storm-0.9.1-incubating/lib/storm-core-0.9.1-incubating.jar:/home/hadoop/apache-storm-0.9.1-incubating/lib/jetty-util-6.1.26.jar:/home/hadoop/apache-storm-0.9.1-incubating/lib/guava-13.0.jar:/home/hadoop/apache-storm-0.9.1-incubating/lib/core.incubator-0.1.0.jar:/home/hadoop/apache-storm-0.9.1-incubating/lib/snakeyaml-1.11.jar:/home/hadoop/apache-storm-0.9.1-incubating/lib/ring-devel-0.3.11.jar:/home/hadoop/apache-storm-0.9.1-incubating/lib/minlog-1.2.jar:/home/hadoop/apache-storm-0.9.1-incubating/lib/logback-core-1.0.6.jar:/home/hadoop/apache-storm-0.9.1-incubating/lib/servlet-api-2.5-20081211.jar:/home/hadoop/apache-storm-0.9.1-incubating/lib/reflectasm-1.07-shaded.jar:/home/hadoop/apache-storm-0.9.1-incubating/lib/logback-classic-1.0.6.jar:/home/hadoop/apache-storm-0.9.1-incubating/lib/math.numeric-tower-0.0.1.jar:/home/hadoop/apache-storm-0.9.1-incubating/lib/hiccup-0.3.6.jar:/home/hadoop/apache-storm-0.9.1-incubating/lib/httpcore-4.1.jar:/home/hadoop/apache-storm-0.9.1-incubating/lib/asm-4.0.jar:/home/hadoop/apache-storm-0.9.1-incubating/lib/zookeeper-3.3.3.jar:/home/hadoop/apache-storm-0.9.1-incubating/lib/curator-framework-1.0.1.jar:/home/hadoop/apache-storm-0.9.1-incubating/lib/junit-3.8.1.jar:/home/hadoop/apache-storm-0.9.1-incubating/lib/jline-2.11.jar:/home/hadoop/apache-storm-0.9.1-incubating/lib/tools.logging-0.2.3.jar:/home/hadoop/apache-storm-0.9.1-incubating/lib/jetty-6.1.26.jar:/home/hadoop/apache-storm-0.9.1-incubating/conf -Dlogfile.name=nimbus.log -Dlogback.configurationFile=/home/hadoop/apache-storm-0.9.1-incubating/logback/cluster.xml backtype.storm.daemon.nimbus
查看报警信息标识是在nimbus的n上，经试验原来是这几个配置名称前需要加空格。即：
空格nimbus.host: "192.168.1.101"
空格storm.zookeeper.port: 2181
空格storm.local.dir: "home/hadoop/storm-0.9.1/data"
空格supervisor.slots.ports:
大家配置storm.yaml时一定要注意了。少一个空格竟然就启动不了，真是不可思议。