Doroszlai, Attila created AMBARI-24981:
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Summary: JournalNode may fail to start due to unreadable config
file
Key: AMBARI-24981
URL: https://issues.apache.org/jira/browse/AMBARI-24981
Project: Ambari
Issue Type: Bug
Components: ambari-agent
Reporter: Doroszlai, Attila
Assignee: Doroszlai, Attila
Fix For: 2.8.0
During startup, JournalNode reads config files that belong to YARN, not HDFS
(eg. {{yarn-site.xml}}), if they are present in the Hadoop config dir.
Ambari's {{File()}} provider creates files at the final location, then sets
metadata (ownership and permissions). This makes the file visible to other
processes with possibly the wrong metadata.
If agent-side parallel execution is enabled, JournalNode may be started
concurrently with some YARN component. JournalNode may encounter a config file
that it cannot read, because the file's permissions and owner are still 440 and
root, respectively, which causes it to shutdown:
{noformat}
ERROR conf.Configuration (Configuration.java:loadResource(2999)) - error
parsing conf yarn-site.xml
java.io.FileNotFoundException: /etc/hadoop/conf/yarn-site.xml (Permission
denied)
{noformat}
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