Todd Lipcon created HADOOP-15550: ------------------------------------ Summary: Avoid static initialization of ObjectMappers Key: HADOOP-15550 URL: https://issues.apache.org/jira/browse/HADOOP-15550 Project: Hadoop Common Issue Type: Bug Components: performance Affects Versions: 3.2.0 Reporter: Todd Lipcon Assignee: Todd Lipcon
Various classes statically initialize an ObjectMapper READER instance. This ends up doing a bunch of class-loading of Jackson libraries that can add up to a fair amount of CPU, even if the reader ends up not being used. This is particularly the case with WebHdfsFileSystem, which is class-loaded by a serviceloader even when unused in a particular job. We should lazy-init these members instead of doing so as a static class member. -- This message was sent by Atlassian JIRA (v7.6.3#76005) --------------------------------------------------------------------- To unsubscribe, e-mail: common-dev-unsubscr...@hadoop.apache.org For additional commands, e-mail: common-dev-h...@hadoop.apache.org