cdh 系统配置文件更新 error parsing conf core-site.xml

环境描述：redhat7.3  CDH5.15.1  采用parcels方式部署

报错描述：airflow调度程序，最近2周偶尔报错，报错类型有2类：1、无法初始化集群配置；2、读取配置权限问题

报错一：

Launching Job 1 out of 1
Number of reduce tasks is set to 0 since there's no reduce operator
java.io.IOException: Cannot initialize Cluster. Please check your configuration for mapreduce.framework.name and the correspond server addresses.
at org.apache.hadoop.mapreduce.Cluster.initialize(Cluster.java:143)
at org.apache.hadoop.mapreduce.Cluster.(Cluster.java:108)
at org.apache.hadoop.mapreduce.Cluster.(Cluster.java:101)
at org.apache.hadoop.mapred.JobClient.init(JobClient.java:477)
at org.apache.hadoop.mapred.JobClient.(JobClient.java:455)

报错二

19/12/21 04:06:27 ERROR conf.Configuration: error parsing conf core-site.xml
java.io.FileNotFoundException: /etc/hive/conf.cloudera.hive/core-site.xml (Permission denied)
at java.io.FileInputStream.open0(Native Method)
at java.io.FileInputStream.open(FileInputStream.java:195)
at java.io.FileInputStream.(FileInputStream.java:138)
at java.io.FileInputStream.(FileInputStream.java:93)
at sun.net.www.protocol.file.FileURLConnection.connect(FileURLConnection.java:90)

报错三

setfacl: Permission denied. user=dip is not the owner of inode=.hive-staging_hive_2019-12-22_07-44-25_997_2557429548076828737-1
java.lang.RuntimeException: java.io.FileNotFoundException: /etc/hive/conf.cloudera.hive/hive-site.xml (Permission denied)
at org.apache.hadoop.conf.Configuration.loadResource(Configuration.java:2811)
at org.apache.hadoop.conf.Configuration.loadResources(Configuration.java:2663)
at org.apache.hadoop.conf.Configuration.getProps(Configuration.java:2559)
at org.apache.hadoop.conf.Configuration.get(Configuration.java:1340)
at org.apache.hadoop.hive.conf.HiveConf.getVar(HiveConf.java:2756)
at org.apache.hadoop.hive.conf.HiveConf.getVar(HiveConf.java:2777)
at org.apache.hadoop.hive.conf.HiveConf.initialize(HiveConf.java:2849)
at org.apache.hadoop.hive.conf.HiveConf.(HiveConf.java:2792)

检查集群中的所有机器，发现有一台机器配置文件一直在疯狂更新：

/etc/hive/conf.cloudera.hive

/etc/hadoop/conf.cloudera.yarn

/etc/hbase/conf.cloudera.hbase

 程序报错原因

配置文件每分钟更新一次，而程序在运行中会读取配置文件，也许在某次读取中，他正处于跟新状态，不可读。

配置文件疯狂更新原因：

检查：

该机器: /var/lib/alternatives  下面有空文件

操作:（删除下面的文件，重启agent后，agent会把需要的文件重新拷贝过来）

删除/var/lib/alternatives  下面所有文件，

重启agent

cd /var/lib/alternatives

rm  -rf   *

systemctl restart cloudera-scm-agent.service

观察 ： 配置文件不再疯狂更新，问题解决。