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。