Wei-Chiu Chuang created HDFS-11333: -------------------------------------- Summary: Namenode unable to start if plugins can not be found Key: HDFS-11333 URL: https://issues.apache.org/jira/browse/HDFS-11333 Project: Hadoop HDFS Issue Type: Bug Components: namenode Affects Versions: 0.21.0 Reporter: Wei-Chiu Chuang
If NameNode is unable to find plugins (specified in dfs.namenode.plugins), it terminates abruptly with the following stack trace: {quote} 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) {quote} 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. -- This message was sent by Atlassian JIRA (v6.3.4#6332) --------------------------------------------------------------------- To unsubscribe, e-mail: hdfs-dev-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-dev-h...@hadoop.apache.org