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Yi Liu commented on HDFS-7734: ------------------------------ Attach the patch. {{LogAdapter}} is used internally, so I only adapt the necessary methods. > Class cast exception in NameNode#main > ------------------------------------- > > Key: HDFS-7734 > URL: https://issues.apache.org/jira/browse/HDFS-7734 > Project: Hadoop HDFS > Issue Type: Bug > Components: namenode > Affects Versions: 2.7.0 > Reporter: Arpit Agarwal > Assignee: Yi Liu > Priority: Blocker > Attachments: HDFS-7734.001.patch > > > NameNode hits the following exception immediately on startup. > {code} > 15/02/03 15:50:25 ERROR namenode.NameNode: Failed to start namenode. > java.lang.ClassCastException: org.apache.log4j.Logger cannot be cast to > org.apache.commons.logging.Log > at > org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1557) > 15/02/03 15:50:25 INFO util.ExitUtil: Exiting with status 1 > {code} > Location of the exception in NameNode.java: > {code} > public static void main(String argv[]) throws Exception { > if (DFSUtil.parseHelpArgument(argv, NameNode.USAGE, System.out, true)) { > System.exit(0); > } > try { > StringUtils.startupShutdownMessage(NameNode.class, argv, > (org.apache.commons.logging.Log) > LogManager.getLogger(LOG.getName())); <<<<< Failed here. > {code} -- This message was sent by Atlassian JIRA (v6.3.4#6332)