Question

我遵循HannesMühleisen描述的MonetDB安装程序，运行下面描述的命令1到6。

sudo yum install openssl-devel pcre-devel
tar xvf MonetDB- .tar。
cd MonetDB - *
./配置
使
sudo make install ---＆gt;在此步骤中失败

Java Home机器是/usr/lib/java/jdk1.8.0_25。显然，安装试图在其他地方找到1.7版本

这是错误文本

make[4]: Entering directory `/usr/local/MonetDB-11.15.19/java/tests'
make  all-am
make[5]: Entering directory `/usr/local/MonetDB-11.15.19/java/tests'
"/usr/local/ant/bin/ant" -f "`readlink -f ./build.xml`" -Dbuilddir="`readlink -f /usr/local/MonetDB-11.15.19/java/tests/jar_jdbctests`" -Djardir="`readlink -f /usr/local/MonetDB-11.15.19/java/tests`" -Dbasedir="`readlink -f .`" jar_jdbctests
Unable to locate tools.jar. Expected to find it in /usr/lib/jvm/java-1.7.0-openjdk-1.7.0.75.x86_64/lib/tools.jar
Buildfile: /usr/local/MonetDB-11.15.19/java/tests/build.xml

prepare:

find_driver:

BUILD FAILED
/usr/local/MonetDB-11.15.19/java/tests/build.xml:87: java.lang.UnsupportedClassVersionError: nl/cwi/monetdb/jdbc/MonetDriver : Unsupported major.minor version 52.0
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:800)
    at org.apache.tools.ant.AntClassLoader.defineClassFromData(AntClassLoader.java:1136)
    at org.apache.tools.ant.AntClassLoader.getClassFromStream(AntClassLoader.java:1307)
    at org.apache.tools.ant.AntClassLoader.findClassInComponents(AntClassLoader.java:1362)
    at org.apache.tools.ant.AntClassLoader.findClass(AntClassLoader.java:1323)
    at org.apache.tools.ant.AntClassLoader.loadClass(AntClassLoader.java:1076)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
    at org.apache.tools.ant.taskdefs.Available.checkClass(Available.java:454)
    at org.apache.tools.ant.taskdefs.Available.eval(Available.java:285)
    at org.apache.tools.ant.taskdefs.condition.And.eval(And.java:42)
    at org.apache.tools.ant.taskdefs.ConditionTask.execute(ConditionTask.java:120)
    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.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
    at org.apache.tools.ant.TaskAdapter.execute(TaskAdapter.java:154)
    at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:292)
    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.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
    at org.apache.tools.ant.Task.perform(Task.java:348)
    at org.apache.tools.ant.Target.execute(Target.java:435)
    at org.apache.tools.ant.Target.performTasks(Target.java:456)
    at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1393)
    at org.apache.tools.ant.Project.executeTarget(Project.java:1364)
    at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41)
    at org.apache.tools.ant.Project.executeTargets(Project.java:1248)
    at org.apache.tools.ant.Main.runBuild(Main.java:851)
    at org.apache.tools.ant.Main.startAnt(Main.java:235)
    at org.apache.tools.ant.launch.Launcher.run(Launcher.java:280)
    at org.apache.tools.ant.launch.Launcher.main(Launcher.java:109)

Answer 1

我认为此计算机上安装了两个不同的Java VM，由于某些原因（怀疑每个用户设置为$JAVA_HOME和/或$PATH）导致使用make 1.8和sudo make install使用1.7。 UnsupportedClassVersionError至少表明了这一点。我建议你确保只使用一个版本。

对于CentOS，应该这样做：

sudo /usr/sbin/alternatives --config java
sudo /usr/sbin/alternatives --config javac

更新：结果MonetDB现在提供CentOS rpms：https://www.monetdb.org/downloads/epel/

使用Java 1.8安装MonetDB错误 - 不支持的major.minor版本52.0

1 个答案: