hadoop - yarn-daemon.sh 写入 HDP 中的错误日志目录

Question

我在笔记本电脑上安装了 Hortonworks HDP 2.2.4.2-2 版。我已经启动了名称节点、二级名称节点和所有数据节点等HDFS服务。我可以通过名称节点 Web 界面浏览 HDFS。问题出在资源管理器上。 HDP 配套文件为 HADOOP_LIBEXEC_DIR 设置了错误的值。它已设置为 /usr/lib/hadoop/libexec，这是错误的。正确的地址是:/usr/hdp/2.2.4.2-2/hadoop/libexec。在我更改此参数并使用此命令启动资源管理器后(使用 yarn 用户):

/usr/hdp/current/hadoop-yarn-resourcemanager/sbin/yarn-daemon.sh --config /etc/hadoop/conf start resourcemanager

显示错误:

mkdir: cannot create directory `/var/log/hadoop-yarn': Permission denied
chown: cannot access `/var/log/hadoop-yarn/yarn': No such file or directory
mkdir: cannot create directory `/var/run/hadoop-yarn': Permission denied
starting resourcemanager, logging to /var/log/hadoop-yarn/yarn/yarn-yarn-resourcemanager-rm.hdp.local.out
/usr/hdp/current/hadoop-yarn-resourcemanager/sbin/yarn-daemon.sh: line 129: cd: /usr/lib/hadoop-yarn: No such file or directory
/usr/hdp/current/hadoop-yarn-resourcemanager/sbin/yarn-daemon.sh: line 131: /var/run/hadoop-yarn/yarn/yarn-yarn-resourcemanager.pid: No such file or directory
/usr/hdp/current/hadoop-yarn-resourcemanager/sbin/yarn-daemon.sh: line 130: /var/log/hadoop-yarn/yarn/yarn-yarn-resourcemanager-rm.hdp.local.out: No such file or directory
head: cannot open `/var/log/hadoop-yarn/yarn/yarn-yarn-resourcemanager-rm.hdp.local.out' for reading: No such file or directory
/usr/hdp/current/hadoop-yarn-resourcemanager/sbin/yarn-daemon.sh: line 135: /var/log/hadoop-yarn/yarn/yarn-yarn-resourcemanager-rm.hdp.local.out: No such file or directory
/usr/hdp/current/hadoop-yarn-resourcemanager/sbin/yarn-daemon.sh: line 136: /var/log/hadoop-yarn/yarn/yarn-yarn-resourcemanager-rm.hdp.local.out: No such file or directory

问题是 yarn-daemon.sh 根据我的环境变量使用了错误的日志目录:

[yarn@rm ~]$ echo ${YARN_LOCAL_DIR}
/hadoop/yarn/local
[yarn@rm ~]$ echo ${YARN_LOG_DIR}
/var/log/hadoop/yarn
[yarn@rm ~]$ echo ${YARN_LOCAL_LOG_DIR}
/hadoop/yarn/logs
[yarn@rm ~]$ echo ${YARN_PID_DIR}
/var/run/hadoop/yarn

这真的是错误还是我做错了什么？

Answer 1

马吉德，

您正在使用的启动脚本，即/usr/hdp/current/hadoop-yarn-resourcemanager/sbin/yarn-daemon.sh 源位于您指定的配置目录中的 yarn-env.sh 脚本，在你的情况

--配置/etc/hadoop/conf

这些环境变量很可能在该脚本中被覆盖了。如果您使用的是 Hortonwork 提供的配套文件，那么它们确实被更改为:

export YARN_LOG_DIR=/var/log/hadoop-yarn/$USER
export YARN_PID_DIR=/var/run/hadoop-yarn/$USER
export HADOOP_LIBEXEC_DIR=/usr/lib/hadoop/libexec

最好的办法是将/etc/hadoop/yarn-env.sh 脚本中的这些值更改为您想要的值，然后重试