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在OS X上使用Java 7和neo4j

neo4j macos java

philh user2407038 · 技术社区 · 13 年前

在系统首选项中将Java升级到7u45后,Neo4j仍然警告我使用错误的版本:

WARNING! You are using an unsupported Java runtime. Please use Oracle(R) Java(TM) Runtime Environment 7.

我想使用neo4jv2,它不支持Java6,所以我需要解决这个问题。

2 回复 | 直到 13 年前

philh user2407038 13 年前

我启动了neo4j 1.9.4服务器,并运行 neo4j info 输出包括以下行:

JAVA_HOME:         /System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home

很明显,我需要设置JAVA_HOME。设置为什么? /usr/libexec/java_home 返回相同的目录。JavaVirtualMachines目录不包括任何其他子文件夹。因此,我尝试探索java控制面板(从系统首选项访问)。在“Java”选项卡下,单击“查看”,7u45的路径如下所示:

/Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home/bin/java

所以我试了一下,猜测 Contents/Home 目录是同构的:

$ export JAVA_HOME=/Library/Internet\ Plug-Ins/JavaAppletPlugin.plugin/Contents/Home
$ neo4j start
WARNING! You are using an unsupported Java runtime. Please use Oracle(R) Java(TM) Runtime Environment 7.
Using additional JVM arguments:  -server -XX:+DisableExplicitGC -Dorg.neo4j.server.properties=conf/neo4j-server.properties -Djava.util.logging.config.file=conf/logging.properties -Dlog4j.configuration=file:conf/log4j.properties -XX:+UseConcMarkSweepGC -XX:+CMSClassUnloadingEnabled -Dneo4j.ext.udc.source=homebrew
Starting Neo4j Server...WARNING: not changing user
process [34808]... waiting for server to be ready. Failed to start within 120 seconds.
Neo4j Server may have failed to start, please check the logs.

这不好。

我搜索发现 this post ,根据Lasse的建议,我编辑了 /usr/local/Cellar/neo4j/1.9.4/libexec/bin/utils 。我添加了两行:

 # check if running Oracle JDK 7, warn if not
 checkjvmcompatibility() {
+  echo $JAVACMD
+  $JAVACMD -version
   $JAVACMD -version 2>&1 | egrep -q "Java HotSpot\\(TM\\) (64-Bit Server|Server|C
 lient) VM"
   if [ $? -eq 1 ]
   then
     echo "WARNING! You are using an unsupported Java runtime. Please use Oracle(R) Java(TM) Runtime Environment 7."
   else
     $JAVACMD -version 2>&1 | egrep -q "java version \"1.7"
     if [ $? -eq 1 ]
     then
       echo "WARNING! You are using an unsupported version of the Java runtime. Please use Oracle(R) Java(TM) Runtime Environment 7."
     fi
   fi
 }

然后重试:

$ neo4j start
/Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home/bin/java
bin/utils: line 349: /Library/Internet: No such file or directory
WARNING! You are using an unsupported Java runtime. Please use Oracle(R) Java(TM) Runtime Environment 7.

路径中的空间看起来很混乱。我试图逃离它,但我的第一个方法失败了:

$ export JAVA_HOME="'/Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home'"
$ neo4j start
Error: JAVA_HOME is not defined correctly.
  We cannot execute '/Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home'/bin/java

然后我决定,简单(不一定很好)的解决方案只是制作一个符号链接:

$ cd /Library/
$ sudo ln -s Internet\ Plug-Ins/ Internet-Plug-Ins
$ export JAVA_HOME=/Library/Internet-Plug-Ins/JavaAppletPlugin.plugin/Contents/Home

此时 neo4j start 正确运行;我设法升级到v2.0.0-M6版本,它仍然有效。

MobileDevMaster 12 年前

您必须在Max操作系统上安装java JDK 1.7.x,然后

运行这个程序可以查看最新的java JDK在哪里。

$/usr/libexec/java_home-V

1.7.0_45, x86_64:   "Java SE 7" /Library/Java/JavaVirtualMachines/jdk1.7.0_45.jdk/Contents/Home
1.6.0_65-b14-462, x86_64:   "Java SE 6" /System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home
1.6.0_65-b14-462, i386: "Java SE 6" /System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home

在这种情况下,我的最新版本是1.7.0_45

$export JAVA_HOME=/Library/JAVA/JavaVirtualMachines/jdk1.7.0_45jdk/Contents/HOME

$bin/neo4j启动

它对我有效。