蚂蚁错误JAVA_HOME没有指向SDK [英] ant error JAVA_HOME does not point to SDK

问题描述

我试图安装SOLR和运行蚂蚁例如构建得到pretty远，但随后给出了一个错误：

I am trying to install SOLR and running "ant example" The build gets pretty far but then gives an error:

/root/apache-solr-3.2.0/solr/common-build.xml:250: The following error occurred while executing this line:
/root/apache-solr-3.2.0/lucene/contrib/contrib-build.xml:58: The following error occurred while executing this line:
/root/apache-solr-3.2.0/lucene/common-build.xml:298: The following error occurred while executing this line:
/root/apache-solr-3.2.0/lucene/common-build.xml:733: Unable to find a javac compiler;
com.sun.tools.javac.Main is not on the classpath.
Perhaps JAVA_HOME does not point to the JDK.
It is currently set to "/usr/lib/jvm/java-1.6.0-openjdk-1.6.0.0.x86_64/jre"

我明确地设置JAVA_HOME（见下文）

I have explicity set JAVA_HOME (see below)

# echo $JAVA_HOME
/usr/lib/jvm/java-1.6.0-openjdk-1.6.0.0.x86_64/

然而，JAVA_HOME，当我运行蚂蚁作为展示
/usr/lib/jvm/java-1.6.0-openjdk-1.6.0.0.x86_64/jre代替＃回声$ JAVA_HOME
/usr/lib/jvm/java-1.6.0-openjdk-1.6.0.0.x86_64/。如果这被设置我想不通。我还设置ANT_HOME，因为它是在其他一些职位，这可能会解决这个问题说明。

However the JAVA_HOME when I run ant is showing as /usr/lib/jvm/java-1.6.0-openjdk-1.6.0.0.x86_64/jre instead of # echo $JAVA_HOME /usr/lib/jvm/java-1.6.0-openjdk-1.6.0.0.x86_64/ . I cannot figure out where this is being set. I also set ANT_HOME as it was stated in some other posts that this might fix the issue.

# echo $ANT_HOME
/usr/share/ant/

这没有解决它的。

推荐答案

OK，我能解决我遇到的问题。我已经设置JAVA_HOME，而不是作为一个系统环境变量。

OK, I was able to solve the problem I was having. I had set JAVA_HOME, but not as a system environment variable.

基本上，蚂蚁是产卵新的进程，并没有拿起任何我已经设置shell变量。因此，虽然我目前的外壳可以看到$ JAVA_HOME，当蚂蚁正在运行它不能。这是布莱恩·凯利对问题有帮助的注释：

Basically, ant was spawning a new process and wasn't picking up any of the shell variables I had set. So while my current shell could see $JAVA_HOME, when ant was running it could not. It was Brian Kelly's helpful comment on the question of:

What does java.home show if you run: ant -diagnostics | grep java.home

这表明，位置蚂蚁一直在寻找默认的java，证明了我的变量没有被拾起。

This showed the location ant was looking for java by default, and proved that my variable wasn't being picked up.

我连接到正在运行bash的机器，所以我不得不把线以下，进入.bash_profile文件：

The machine I was connected to was running bash, so I had to put the lines below into .bash_profile:

JAVA_HOME=/usr/java/jdk1.6.0_18
export JAVA_HOME

在此之后，它跑顺利。

After this, it ran without a hitch.

希望这可以帮助别人。

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