[HDFS-7734] Class cast exception in NameNode#main

• Type: Bug
• Status: Closed
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 2.7.0
• Fix Version/s: 2.7.0
• Component/s: namenode
• Target Version/s: 2.7.0
• Assignee: Yi Liu
• Reporter: Arpit Agarwal
• Created: 04/Feb/15 00:34
• Updated: 10/Apr/15 20:29
• Resolved: 04/Feb/15 19:32

Description

NameNode hits the following exception immediately on startup.

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

Location of the exception in NameNode.java:

  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.

Issue Links

• is broken by: HDFS-7712 Switch blockStateChangeLog to use slf4j