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From "Matt Foley (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-2329) HDFS-2317 in trunk appears to have broken the build
Date Thu, 15 Sep 2011 22:25:10 GMT

    [ https://issues.apache.org/jira/browse/HDFS-2329?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13105738#comment-13105738
] 

Matt Foley commented on HDFS-2329:
----------------------------------

I disagree.  Java 1.6 reached stability in 2009.  There's no reason not to allow ourselves
to use its features.  Furthermore, Hadoop wiki has documented the requirement for Java 1.6
since at least April, 2010:  see [HadoopJavaVersions|http://wiki.apache.org/hadoop/HadoopJavaVersions]
and it's [Revision History|http://wiki.apache.org/hadoop/HadoopJavaVersions?action=info].

> HDFS-2317 in trunk appears to have broken the build
> ---------------------------------------------------
>
>                 Key: HDFS-2329
>                 URL: https://issues.apache.org/jira/browse/HDFS-2329
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: name-node
>    Affects Versions: 0.24.0
>            Reporter: Robert Joseph Evans
>            Priority: Blocker
>
> Trunk HDFS build fails with 
> {noformat}
> [ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:2.3.2:compile
(default-compile) on project hadoop-hdfs: Compilation failure
> [ERROR] /home/evans/src/hadoop-git/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/web/WebHdfsFileSystem.java:[209,22]
type parameters of <T>T cannot be determined; no unique maximal instance exists for
type variable T with upper bounds T,java.lang.Object
> {noformat}
> On my systems
> {noformat}
> $ java -version
> java version "1.6.0_22"
> Java(TM) SE Runtime Environment (build 1.6.0_22-b04)
> Java HotSpot(TM) Server VM (build 17.1-b03, mixed mode)
> {noformat}
> {noformat}
>  $ svn info
> Path: .
> URL: http://svn.apache.org/repos/asf/hadoop/common/trunk
> Repository Root: http://svn.apache.org/repos/asf
> Repository UUID: 13f79535-47bb-0310-9956-ffa450edef68
> Revision: 1170215
> Node Kind: directory
> Schedule: normal
> Last Changed Author: szetszwo
> Last Changed Rev: 1170085
> Last Changed Date: 2011-09-13 03:34:27 -0500 (Tue, 13 Sep 2011)
> {noformat}

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