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ASF GitHub Bot commented on HADOOP-13320: ----------------------------------------- Github user templedf commented on the issue: https://github.com/apache/hadoop/pull/108 Looks like the right fix, but can you simplify the logic a little, i.e. {{(len != 2) && (len != 4))}}? > Fix arguments check in documentation for WordCount v2.0 > ------------------------------------------------------- > > Key: HADOOP-13320 > URL: https://issues.apache.org/jira/browse/HADOOP-13320 > Project: Hadoop Common > Issue Type: Bug > Components: documentation > Reporter: niccolo becchi > Priority: Trivial > > This issue is affecting the documentation page, so the code is not covered by > any tests. It's actually visible on the page: > https://hadoop.apache.org/docs/current/hadoop-mapreduce-client/hadoop-mapreduce-client-core/MapReduceTutorial.html#Example:_WordCount_v2.0 > On the Example: WordCount v2.0 > The actual arguments check is wrong, as it's never printing the message of > the correct usage. So, running the code with no parameters, as in the > following example: > {code} > yarn jar /var/tmp/WordCount.jar task0.WordCount2 > {code} > > I have got the following exception message in output: > {code} > Exception in thread "main" java.lang.IndexOutOfBoundsException: Index: 0, > Size: 0 > at java.util.ArrayList.rangeCheck(ArrayList.java:635) > at java.util.ArrayList.get(ArrayList.java:411) > at task0.WordCount2.main(WordCount2.java:131) > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) > at > sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) > at > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) > at java.lang.reflect.Method.invoke(Method.java:606) > at org.apache.hadoop.util.RunJar.run(RunJar.java:221) > at org.apache.hadoop.util.RunJar.main(RunJar.java:136) > {code} > Intead than the expected friendly message: > {code} > Usage: wordcount <in> <out> [-skip skipPatternFile] > {code} -- This message was sent by Atlassian JIRA (v6.3.4#6332) --------------------------------------------------------------------- To unsubscribe, e-mail: common-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: common-issues-h...@hadoop.apache.org