Gopal V created HADOOP-9570:
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Summary: Configuration.addResource() should only parse the new
resource
Key: HADOOP-9570
URL: https://issues.apache.org/jira/browse/HADOOP-9570
Project: Hadoop Common
Issue Type: Bug
Components: conf
Environment: Ubuntu LXC
Reporter: Gopal V
Assignee: Gopal V
Priority: Minor
Hadoop configuration parsing re-parses all configuration files when a new
resource is added to the configuration object.
This is wasteful and runs through every deprecation check unnecessarily.
{code}
JobConf clone = new JobConf(job);
clone.addResource(...);
{code}
will reparse every file including core-site, hdfs-site etc.
Resource addition can be taken care of cleanly, if the addResourceObject() call
applies the new resource, followed by applying the overlay, without re-parsing
any of the older files already loaded into the hashtable.
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