Java VisualVM (jvisualvm) 工具在启动时抛出警告“无法安装某些模块”
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【中文标题】Java VisualVM (jvisualvm) 工具在启动时抛出警告“无法安装某些模块”【英文标题】：Java VisualVM (jvisualvm) tool throws warning "could not install some modules" at startup 【发布时间】：2016-08-08 11:15:15 【问题描述】：，此后即使单击 jvisualvm 警告屏幕忽略按钮也无法启动。
系统详情： 1. Java 版本“1.8.0”Java HotSpot (TM) 64-Bit Server VM (build 25.0-b69，混合模式） 2.操作系统Debian 7.8 64位
Issue Warning details below:
Warning - could not install some modules:
org.netbeans.lib.profiler.common - None of the modules providing the capability org.netbeans.lib.profiler.common.Profiler could be installed.
org.netbeans.modules.profiler.api - The module org.netbeans.lib.profiler.common would also need to be installed.
com.sun.tools.visualvm.core - The module org.netbeans.modules.profiler.api would also need to be installed.
com.sun.tools.visualvm.core - The module org.netbeans.lib.profiler.common would also need to be installed.
com.sun.tools.visualvm.core - The module named org.netbeans.modules.profiler/2 was needed and not found.
com.sun.tools.visualvm.host - The module com.sun.tools.visualvm.core would also need to be installed.
com.sun.tools.visualvm.host.views - The module com.sun.tools.visualvm.host would also need to be installed.
com.sun.tools.visualvm.host.views - The module com.sun.tools.visualvm.core would also need to be installed.
com.sun.tools.visualvm.application - The module com.sun.tools.visualvm.host would also need to be installed.
com.sun.tools.visualvm.application - The module com.sun.tools.visualvm.core would also need to be installed.
com.sun.tools.visualvm.tools - The module com.sun.tools.visualvm.host would also need to be installed.
com.sun.tools.visualvm.tools - The module com.sun.tools.visualvm.core would also need to be installed.
com.sun.tools.visualvm.tools - The module com.sun.tools.visualvm.application would also need to be installed.
com.sun.tools.visualvm.jvmstat - The module com.sun.tools.visualvm.host would also need to be installed.
com.sun.tools.visualvm.jvmstat - The module com.sun.tools.visualvm.core would also need to be installed.
com.sun.tools.visualvm.jvmstat - The module com.sun.tools.visualvm.application would also need to be installed.
com.sun.tools.visualvm.jvmstat - The module com.sun.tools.visualvm.tools would also need to be installed.
com.sun.tools.visualvm.coredump - The module com.sun.tools.visualvm.core would also need to be installed.
com.sun.tools.visualvm.coredump - The module com.sun.tools.visualvm.tools would also need to be installed.
com.sun.tools.visualvm.threaddump - The module com.sun.tools.visualvm.core would also need to be installed.
com.sun.tools.visualvm.threaddump - The module com.sun.tools.visualvm.coredump would also need to be installed.
com.sun.tools.visualvm.threaddump - The module com.sun.tools.visualvm.application would also need to be installed.
com.sun.tools.visualvm.threaddump - The module com.sun.tools.visualvm.tools would also need to be installed.
com.sun.tools.visualvm.heapdump - The module named org.netbeans.modules.profiler.heapwalker was needed and not found.
com.sun.tools.visualvm.heapdump - The module com.sun.tools.visualvm.core would also need to be installed.
com.sun.tools.visualvm.heapdump - The module com.sun.tools.visualvm.coredump would also need to be installed.
com.sun.tools.visualvm.heapdump - The module com.sun.tools.visualvm.application would also need to be installed.
com.sun.tools.visualvm.heapdump - The module com.sun.tools.visualvm.tools would also need to be installed.
com.sun.tools.visualvm.application.views - The module com.sun.tools.visualvm.threaddump would also need to be installed.
com.sun.tools.visualvm.application.views - The module com.sun.tools.visualvm.host would also need to be installed.
com.sun.tools.visualvm.application.views - The module com.sun.tools.visualvm.core would also need to be installed.
com.sun.tools.visualvm.application.views - The module com.sun.tools.visualvm.coredump would also need to be installed.
com.sun.tools.visualvm.application.views - The module com.sun.tools.visualvm.heapdump would also need to be installed.
com.sun.tools.visualvm.application.views - The module com.sun.tools.visualvm.application would also need to be installed.
com.sun.tools.visualvm.application.views - The module com.sun.tools.visualvm.tools would also need to be installed.
com.sun.tools.visualvm.jvm - The module com.sun.tools.visualvm.threaddump would also need to be installed.
com.sun.tools.visualvm.jvm - The module com.sun.tools.visualvm.host would also need to be installed.
com.sun.tools.visualvm.jvm - The module com.sun.tools.visualvm.core would also need to be installed.
com.sun.tools.visualvm.jvm - The module com.sun.tools.visualvm.heapdump would also need to be installed.
com.sun.tools.visualvm.jvm - The module com.sun.tools.visualvm.application would also need to be installed.
com.sun.tools.visualvm.jvm - The module com.sun.tools.visualvm.tools would also need to be installed.
com.sun.tools.visualvm.sa - The module com.sun.tools.visualvm.host would also need to be installed.
com.sun.tools.visualvm.sa - The module com.sun.tools.visualvm.core would also need to be installed.
com.sun.tools.visualvm.sa - The module com.sun.tools.visualvm.coredump would also need to be installed.
com.sun.tools.visualvm.sa - The module com.sun.tools.visualvm.application would also need to be installed.
com.sun.tools.visualvm.sa - The module com.sun.tools.visualvm.tools would also need to be installed.
com.sun.tools.visualvm.attach - The module com.sun.tools.visualvm.host would also need to be installed.
com.sun.tools.visualvm.attach - The module com.sun.tools.visualvm.core would also need to be installed.
com.sun.tools.visualvm.attach - The module com.sun.tools.visualvm.application would also need to be installed.
com.sun.tools.visualvm.attach - The module com.sun.tools.visualvm.tools would also need to be installed.
com.sun.tools.visualvm.modules.appui - The module com.sun.tools.visualvm.core would also need to be installed.
com.sun.tools.visualvm.modules.appui - The module org.netbeans.modules.profiler.api would also need to be installed.
com.sun.tools.visualvm.profiling - The module named com.sun.tools.visualvm.core/0-1 was needed and not found.
com.sun.tools.visualvm.profiling - The module named org.netbeans.modules.profiler/2 was needed and not found.
com.sun.tools.visualvm.profiling - The module named com.sun.tools.visualvm.application/0-1 was needed and not found.
com.sun.tools.visualvm.profiling - The module named org.netbeans.modules.profiler.snaptracer/1 was needed and not found.
com.sun.tools.visualvm.profiler - The module com.sun.tools.visualvm.host would also need to be installed.
com.sun.tools.visualvm.profiler - The module com.sun.tools.visualvm.core would also need to be installed.
com.sun.tools.visualvm.profiler - The module named org.netbeans.modules.profiler/2 was needed and not found.
com.sun.tools.visualvm.profiler - The module com.sun.tools.visualvm.application would also need to be installed.
com.sun.tools.visualvm.profiler - The module named org.netbeans.modules.profiler.utilities/1 was needed and not found.
com.sun.tools.visualvm.profiler - The module com.sun.tools.visualvm.profiling would also need to be installed.
com.sun.tools.visualvm.sampler - The module named com.sun.tools.visualvm.heapdump/0-1 was needed and not found.
com.sun.tools.visualvm.sampler - The module named com.sun.tools.visualvm.tools/0-1 was needed and not found.
com.sun.tools.visualvm.sampler - The module named com.sun.tools.visualvm.core/0-1 was needed and not found.
com.sun.tools.visualvm.sampler - The module org.netbeans.modules.profiler.api would also need to be installed.
com.sun.tools.visualvm.sampler - The module named com.sun.tools.visualvm.threaddump/0-1 was needed and not found.
com.sun.tools.visualvm.sampler - The module org.netbeans.lib.profiler.common would also need to be installed.
com.sun.tools.visualvm.sampler - The module named org.netbeans.modules.profiler/2 was needed and not found.
com.sun.tools.visualvm.sampler - The module named com.sun.tools.visualvm.application/0-1 was needed and not found.
com.sun.tools.visualvm.sampler - The module named com.sun.tools.visualvm.coredump/0-1 was needed and not found.
com.sun.tools.visualvm.sampler - The module named com.sun.tools.visualvm.profiling/0-1 was needed and not found.
com.sun.tools.visualvm.jmx - The module com.sun.tools.visualvm.host would also need to be installed.
com.sun.tools.visualvm.jmx - The module com.sun.tools.visualvm.core would also need to be installed.
com.sun.tools.visualvm.jmx - The module com.sun.tools.visualvm.application would also need to be installed.
com.sun.tools.visualvm.jmx - The module com.sun.tools.visualvm.tools would also need to be installed.
com.sun.tools.visualvm.host.remote - The module com.sun.tools.visualvm.host would also need to be installed.
com.sun.tools.visualvm.host.remote - The module com.sun.tools.visualvm.core would also need to be installed.
com.sun.tools.visualvm.host.remote - The module com.sun.tools.visualvm.application would also need to be installed.
com.sun.tools.visualvm.host.remote - The module com.sun.tools.visualvm.tools would also need to be installed.
java.lang.IllegalArgumentException: Not enabled: org.netbeans.modules.profiler.api
at org.netbeans.Module.getClassLoader(Module.java:402)
at org.netbeans.StandardModule.getParentLoader(StandardModule.java:526)
at org.netbeans.StandardModule.classLoaderUp(StandardModule.java:483)
at org.netbeans.ModuleManager.enable(ModuleManager.java:1026)
at org.netbeans.ModuleManager.enable(ModuleManager.java:970)
at org.netbeans.core.startup.ModuleList.installNew(ModuleList.java:301)
at org.netbeans.core.startup.ModuleList.trigger(ModuleList.java:237)
at org.netbeans.core.startup.ModuleSystem.restore(ModuleSystem.java:262)
at org.netbeans.core.startup.Main.getModuleSystem(Main.java:142)
at org.netbeans.core.startup.Main.getModuleSystem(Main.java:111)
at org.netbeans.core.startup.Main.start(Main.java:268)
at org.netbeans.core.startup.TopThreadGroup.run(TopThreadGroup.java:84)
at java.lang.Thread.run(Thread.java:744)
【问题讨论】：
【参考方案1】：根本原因是 jvisualvm 用户目录指向一些我删除并更正的旧 java 引用。详情如下：
为了了解问题的细节；我用控制台选项运行 jvisualvm
**./jvisualvm -J-Dnetbeans.logger.console=true
这给了我一些输出和细节，如下所示：
Log Session: Monday, August 8, 2016 12:39:55 AM EDT
>System Info:
Product Version = Java VisualVM
Operating System = Linux version 3.2.0-4-amd64 running on amd64
Java; VM; Vendor = 1.8.0; Java HotSpot(TM) 64-Bit Server VM 25.0-b69; Oracle Corporation
Runtime = Java(TM) SE Runtime Environment 1.8.0-b129
Java Home = /usr/local/jetty/common/Java/jdk8/jre
System Locale; Encoding = en_US (visualvm); UTF-8
Home Directory = /root
Current Directory = /usr/local/jetty/common/Java/jdk8/bin
User Directory = /root/.visualvm/7u60
Cache Directory = /root/.cache/visualvm/7u60
Installation = /usr/local/jetty/common/Java/jdk8/lib/visualvm/visualvm
/usr/local/jetty/common/Java/jdk8/lib/visualvm/profiler
/usr/local/jetty/common/Java/jdk8/lib/visualvm/platform
Boot & Ext. Classpath = /usr/local/jetty/common/Java/jdk8/jre/lib/resources.jar:/usr/local/jetty/common/Java/jdk8/jre/lib/rt.jar:/usr/local/jetty/common/Java/jdk8/jre/lib/sunrsasign.jar:/usr/local/jetty/common/Java/jdk8/jre/lib/jsse.jar:/usr/local/jetty/common/Java/jdk8/jre/lib/jce.jar:/usr/local/jetty/common/Java/jdk8/jre/lib/charsets.jar:/usr/local/jetty/common/Java/jdk8/jre/lib/jfr.jar:/usr/local/jetty/common/Java/jdk8/jre/classes:/usr/local/jetty/common/Java/jdk8/jre/lib/ext/localedata.jar:/usr/local/jetty/common/Java/jdk8/jre/lib/ext/zipfs.jar:/usr/local/jetty/common/Java/jdk8/jre/lib/ext/sunpkcs11.jar:/usr/local/jetty/common/Java/jdk8/jre/lib/ext/nashorn.jar:/usr/local/jetty/common/Java/jdk8/jre/lib/ext/dnsns.jar:/usr/local/jetty/common/Java/jdk8/jre/lib/ext/sunec.jar:/usr/local/jetty/common/Java/jdk8/jre/lib/ext/jfxrt.jar:/usr/local/jetty/common/Java/jdk8/jre/lib/ext/sunjce_provider.jar:/usr/local/jetty/common/Java/jdk8/jre/lib/ext/cldrdata.jar
Application Classpath = /usr/local/jetty/common/Java/jdk8/lib/visualvm/platform/lib/boot.jar:/usr/local/jetty/common/Java/jdk8/lib/visualvm/platform/lib/org-openide-modules.jar:/usr/local/jetty/common/Java/jdk8/lib/visualvm/platform/lib/org-openide-util.jar:/usr/local/jetty/common/Java/jdk8/lib/visualvm/platform/lib/org-openide-util-lookup.jar:/usr/local/jetty/common/Java/jdk8/lib/visualvm/platform/lib/locale/boot_ja.jar:/usr/local/jetty/common/Java/jdk8/lib/visualvm/platform/lib/locale/boot_zh_CN.jar:/usr/local/jetty/common/Java/jdk8/lib/visualvm/platform/lib/locale/org-openide-modules_ja.jar:/usr/local/jetty/common/Java/jdk8/lib/visualvm/platform/lib/locale/org-openide-modules_zh_CN.jar:/usr/local/jetty/common/Java/jdk8/lib/visualvm/platform/lib/locale/org-openide-util_ja.jar:/usr/local/jetty/common/Java/jdk8/lib/visualvm/platform/lib/locale/org-openide-util-lookup_ja.jar:/usr/local/jetty/common/Java/jdk8/lib/visualvm/platform/lib/locale/org-openide-util-lookup_zh_CN.jar:/usr/local/jetty/common/Java/jdk8/lib/visualvm/platform/lib/locale/org-openide-util_zh_CN.jar:/usr/local/jetty/common/Java/jdk8/lib/dt.jar:/usr/local/jetty/common/Java/jdk8/lib/tools.jar
Startup Classpath = /usr/local/jetty/common/Java/jdk8/lib/visualvm/platform/core/core.jar:/usr/local/jetty/common/Java/jdk8/lib/visualvm/platform/core/org-openide-filesystems.jar:/usr/local/jetty/common/Java/jdk8/lib/visualvm/platform/core/locale/org-openide-filesystems_zh_CN.jar:/usr/local/jetty/common/Java/jdk8/lib/visualvm/platform/core/locale/core_ja.jar:/usr/local/jetty/common/Java/jdk8/lib/visualvm/platform/core/locale/org-openide-filesystems_ja.jar:/usr/local/jetty/common/Java/jdk8/lib/visualvm/platform/core/locale/core_zh_CN.jar:/usr/local/jetty/common/Java/jdk8/lib/visualvm/visualvm/core/com-sun-tools-visualvm-modules-startup.jar:/usr/local/jetty/common/Java/jdk8/lib/visualvm/visualvm/core/locale/com-sun-tools-visualvm-modules-startup_ja.jar:/usr/local/jetty/common/Java/jdk8/lib/visualvm/visualvm/core/locale/com-sun-tools-visualvm-modules-startup_zh_CN.jar:/usr/local/jetty/common/Java/jdk8/lib/visualvm/visualvm/core/locale/core_visualvm.jar
-----------------------------------------------------------
就 jdk8 和 home 等而言一切都很好，但是用户目录指向一些不存在的 java 路径，然后我在我的 linux 文件系统中跟踪它：
User Directory = /root/.visualvm/7u60
为了解决问题；我删除了操作系统中的/root/.visualvm/7u60 目录。
再次运行./jvisualvm，它没有问题。
之前我尝试使用 ./jvisualvm 和 --help 选项运行，其中看到了 jdkhome 并尝试更改 jdkhome 但没有运气。最后从操作系统中删除文件夹对我有用。
Wow! Great!!
【讨论】：
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