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  1. Hadoop HDFS
  2. HDFS-11333

Print a user friendly error message when plugins are not found

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      Description

      If NameNode is unable to find plugins (specified in dfs.namenode.plugins), it terminates abruptly with the following stack trace:

      Failed to start namenode.
      java.lang.RuntimeException: java.lang.ClassNotFoundException: Class XXX not found
        at org.apache.hadoop.conf.Configuration.getClasses(Configuration.java:2178)
        at org.apache.hadoop.conf.Configuration.getInstances(Configuration.java:2250)
        at org.apache.hadoop.hdfs.server.namenode.NameNode.startCommonServices(NameNode.java:713)
        at org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(NameNode.java:691)
        at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:843)
        at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:822)
        at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1543)
        at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1611)

      We should catch this exception, log a warning message and let it proceed, as missing the third party library does not affect the functionality of NameNode. We caught this bug during a CDH upgrade where a third party plugin was not in the lib directory of the newer version of CDH.

        Attachments

        1. HDFS-11333.001.patch
          3 kB
          Wei-Chiu Chuang
        2. HDFS-11333.002.patch
          2 kB
          Wei-Chiu Chuang
        3. HDFS-11333.002.patch
          2 kB
          Wei-Chiu Chuang
        4. HDFS-11333.003.patch
          2 kB
          Wei-Chiu Chuang

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            People

            • Assignee:
              jojochuang Wei-Chiu Chuang
              Reporter:
              jojochuang Wei-Chiu Chuang
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              Dates

              • Created:
                Updated:
                Resolved: