mapred.ClientServiceDelegate:Application state is completed. FinalApplicationStatus=SUCCEEDED.错误解决_mapred.clientservicedelegate: application state is-优快云博客

本文链接：https://blog.youkuaiyun.com/C_time/article/details/99727075

本文记录了一次HBase操作中遇到的问题：在MapReduce任务成功完成后，尝试连接到jobhistoryserver时出现反复重试连接的错误。通过检查发现jobhistoryservice未启动，使用mr-jobhistory-daemon.sh命令启动历史服务器后问题得以解决。

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19/08/19 10:00:29 INFO mapred.ClientServiceDelegate:Application state is completed. FinalApplicationStatus=SUCCEEDED.  Redirecting to job history server
19/08/19 10:00:30 INFO ipc.Client: 
Retrying connect to server: 0.0.0.0/0.0.0.0:10020. Already tried 0 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1000 MILLISECONDS)
19/08/19 10:00:31 INFO ipc.Client: Retrying connect to server: 0.0.0.0/0.0.0.0:10020. Already tried 1 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1000 MILLISECONDS)

刚刚运行hbase程序出现map reduce结束了结果也出来了
但是紧接着就出现错误了Retrying connect to server: 0.0.0.0/0.0.0.0:10020. Already tried 0 time(s);
一直在重复出现这句话然后就报错
我就一直注意这句话搜解决办法也没有找到

然后往上翻才注意到第一句话

mapred.ClientServiceDelegate:Application state is completed. FinalApplicationStatus=SUCCEEDED.  Redirecting to job history server

搜了一下找到解决方案

jps发现job history service 没有启动

命令 mr-jobhistory-daemon.sh start historyserver 解决

emmm
不知道怎么回事出现这个错误猜想是多次重启服务导致瓦特了

总结下前后发了两篇博客解决错误的由头是get不到点出现的错误信息可能在第一句话也可能在中间或最后
多看看！
实在不行看日志！