Hadoop三：hadoop运行错误3：yarn执行作业卡死

最新推荐文章于 2024-08-10 02:40:24 发布

Miss_Bueno

最新推荐文章于 2024-08-10 02:40:24 发布

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本文详细介绍了在部署Hadoop集群过程中遇到的常见错误及其解决方案，包括因主机名配置不当导致的UnknownHostException，以及系统时间不一致引起的授权过期问题。通过修改/etc/hosts文件和调整系统时间同步，确保集群稳定运行。

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部署步骤一致，每次错误不一样；

错误1：

 INFO org.apache.hadoop.yarn.server.resourcemanager.amlauncher.AMLauncher: Error launching appattempt_1541382172965_0001_000001. Got exception: java.net.UnknownHostException: Invalid host name: local host is: (unknown); destination host is: "node03":50682; java.net.UnknownHostException; For more details see: http://wiki.apache.org/hadoop/UnknownHost

修改/etc/hosts。/etc/sysconfig/network中主机名

错误2：

18/11/06 09:04:30 INFO mapreduce.Job: Task Id : attempt_1541465096076_0006_m_000000_1000, Status : FAILED
Container launch failed for container_1541465096076_0006_02_000002 : org.apache.hadoop.yarn.exceptions.YarnException: Unauthorized request to start container. 
This token is expired. current time is 1541476768229 found 1541466870379
Note: System times on machines may be out of sync. Check system time and time zones.
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)

集群系统时间不一致造成的。分别在集群每台机器上执行：

# cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime
# ntpdate s2c.time.edu.cn
再利用date查看时间是否成功。
注：执行 ntpdate s2c.time.edu.cn时可能会报错，错误为：
 6 Nov 12:21:24 ntpdate[6941]: the NTP socket is in use, exiting
关闭ntpd服务即可，命令为：service ntpd stop或/bin/systemctl status ntpd.service