我只是通过运行 wordcount 示例来测试 hadoop，但是出现了这个错误：
14/07/30 12:03:02 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your
platform... using builtin-java classes where applicable
14/07/30 12:03:03 INFO client.RMProxy: Connecting to ResourceManager at /127.0.0.1:8032
14/07/30 12:03:04 INFO ipc.Client: Retrying connect to server: localhost/127.0.0.1:8032. Already
tried 0 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1
SECONDS)
14/07/30 12:03:05 INFO ipc.Client: Retrying connect to server: localhost/127.0.0.1:8032. Already
tried 1 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1
SECONDS)
互联网上的一些人认为这是因为 yarn-site.xml 文件。我的是：
<property>
<name>yarn.nodemanager.aux-services</name>
<value>mapreduce_shuffle</value>
</property>
<property>
<name>yarn.nodemanager.aux-services.mapreduce.shuffle.class</name>
<value>org.apache.hadoop.mapred.ShuffleHandler</value>
</property>
<property>
<name>yarn.scheduler.minimum-allocation-mb</name>
<value>128</value>
<description>Minimum limit of memory to allocate to each container request at the Resource
Manager.</description>
</property>
<property>
<name>yarn.scheduler.maximum-allocation-mb</name>
<value>1024</value>
<description>Maximum limit of memory to allocate to each container request at the Resource
Manager.</description>
</property>
<property>
<name>yarn.scheduler.minimum-allocation-vcores</name>
<value>1</value>
<description>The minimum allocation for every container request at the RM, in terms of
virtual CPU cores. Requests lower than this won't take effect, and the specified value will
get allocated the minimum.</description>
</property>
<property>
<name>yarn.scheduler.maximum-allocation-vcores</name>
<value>2</value>
<description>The maximum allocation for every container request at the RM, in terms of
virtual CPU cores. Requests higher than this won't take effect, and will get capped to this
value.</description>
</property>
<property>
<name>yarn.nodemanager.resource.memory-mb</name>
<value>2048</value>
<description>Physical memory, in MB, to be made available to running containers</description>
</property>
<property>
<name>yarn.nodemanager.resource.cpu-vcores</name>
<value>2</value>
<description>Number of CPU cores that can be allocated for containers.</description>
</property>
<property>
<name>yarn.nodemanager.aux-services</name>
<value>mapreduce_shuffle</value>
</property>
我上周运行了程序，它运行良好，所以我真的不知道发生了什么。帮助表示赞赏。