hadoop常见错误

标签：hadoop   常见错误   hdfs   mapreduce   yarn   

hadoop常见错误集锦：

1.DataXceiver error processing WRITE_BLOCK operation

ERROR org.apache.hadoop.hdfs.server.datanode.DataNode: 192-168-11-58:50010:DataXceiver error processing WRITE_BLOCK operation  src: 

# End of file
*               -       nofile          1000000
*               -       nproc          1000000

<property>   
    <name>dfs.datanode.max.transfer.threads</name>   
    <value>8192</value>   
    <description>   
        Specifies the maximum number of threads to use for transferring data  
        in and out of the DN.   
    </description>  
</property>  

2.jobhistory无法启动，日志如下

FATAL org.apache.hadoop.mapreduce.v2.hs.JobHistoryServer: Error starting JobHistoryServer
org.apache.hadoop.yarn.YarnException: Error creating done directory: [hdfs://192.168.11.61:8020/tmp/hadoop-yarn/staging/history/done]
	at org.apache.hadoop.mapreduce.v2.hs.HistoryFileManager.init(HistoryFileManager.java:424)
	at org.apache.hadoop.mapreduce.v2.hs.JobHistory.init(JobHistory.java:87)
	at org.apache.hadoop.yarn.service.CompositeService.init(CompositeService.java:58)
	at org.apache.hadoop.mapreduce.v2.hs.JobHistoryServer.init(JobHistoryServer.java:87)
	at org.apache.hadoop.mapreduce.v2.hs.JobHistoryServer.main(JobHistoryServer.java:145)
Caused by: java.net.NoRouteToHostException: No Route to Host from  hadoop-62/192.168.11.62 to hadoop-61:8020 failed on socket timeout exception: java.net.NoRouteToHostException: No route to host; For more details see:  http://wiki.apache.org/hadoop/NoRouteToHost 

3.Hadoop集群内存通过8088端口查看显示只有16GB，实际物理内存为64GB/节点。

Hadoop 2.X之后的版本默认的NodeManager总的可用物理内存为8GB（8192MB），是写死的，需要通过在yarn-site.xml配置文件中添加yarn.nodemanager.resource.memory-mb项，并改成你需要设置的物理内存大小。注意，一旦设置，整个运行过程中不可动态修改，通过配置文件进行修改以后，需要重启NodeManager服务。另外，该参数的默认值是8192MB，即使你的机器内存不够8192MB，YARN也会按照这些内存来使用，因此，这个值一定要配置。不过，Apache已经正在尝试将该参数做成可动态修改的。可能后续版本中会有所改善。

hadoop常见错误

标签：hadoop   常见错误   hdfs   mapreduce   yarn   

原文地址：http://blog.csdn.net/hwwn2009/article/details/40185291