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Steve Loughran commented on HADOOP-11223: ----------------------------------------- bq. Would it simplify things making this class package private and then adding a static method to Configuration to create the unmodifiable object? yes, but we should still add as @Unstable just to warn people that we are evolving this, and in fact the immutability itself may change > Offer a read-only conf alternative to new Configuration() > --------------------------------------------------------- > > Key: HADOOP-11223 > URL: https://issues.apache.org/jira/browse/HADOOP-11223 > Project: Hadoop Common > Issue Type: Bug > Components: conf > Reporter: Gopal V > Assignee: Michael Miller > Priority: Major > Labels: Performance > Attachments: HADOOP-11223.001.patch, HADOOP-11223.002.patch, > HADOOP-11223.003.patch > > > new Configuration() is called from several static blocks across Hadoop. > This is incredibly inefficient, since each one of those involves primarily > XML parsing at a point where the JIT won't be triggered & interpreter mode is > essentially forced on the JVM. > The alternate solution would be to offer a {{Configuration::getDefault()}} > alternative which disallows any modifications. > At the very least, such a method would need to be called from > # org.apache.hadoop.io.nativeio.NativeIO::<clinit>() > # org.apache.hadoop.security.SecurityUtil::<clinit>() > # org.apache.hadoop.yarn.factory.providers.RecordFactoryProvider::<clinit> -- This message was sent by Atlassian JIRA (v7.6.3#76005) --------------------------------------------------------------------- To unsubscribe, e-mail: common-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: common-issues-h...@hadoop.apache.org