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Wei-Chiu Chuang updated HDFS-11333: ----------------------------------- Priority: Minor (was: Major) > Print a user friendly error message when plugins are not found > -------------------------------------------------------------- > > Key: HDFS-11333 > URL: https://issues.apache.org/jira/browse/HDFS-11333 > Project: Hadoop HDFS > Issue Type: Improvement > Components: namenode > Affects Versions: 0.21.0 > Reporter: Wei-Chiu Chuang > Assignee: Wei-Chiu Chuang > Priority: Minor > Labels: supportability > Attachments: HDFS-11333.001.patch, HDFS-11333.002.patch, > HDFS-11333.002.patch, HDFS-11333.003.patch > > > 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 (v6.3.15#6346) --------------------------------------------------------------------- To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org