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aragozin avatar aragozin commented on July 22, 2024

sjk is looking for file lib/tools.jar relative to your JDK directory. tools.jar is required to do all JVM discovery and attachment magic.

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941112341 avatar 941112341 commented on July 22, 2024

thans for your reply.Maybe it's about version.When i upgrade jdk8 to 9，it work well.

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aragozin avatar aragozin commented on July 22, 2024

jdk9 doesn't include tools.jar, it includes required classes as part of standard runtime

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zhonghuasheng avatar zhonghuasheng commented on July 22, 2024 
$ java -jar sjk-0.12-SNAPSHOT.jar ttop -p 6344 -n 20 -o CPU
Java home points to C:\Program Files\Java\jre1.8.0_181 make sure it is not a JRE path
Failed to add tools.jar to classpath
java.lang.ClassNotFoundException: com.sun.tools.attach.VirtualMachine
        at java.net.URLClassLoader.findClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at org.gridkit.lab.jvm.attach.AttachAPI.<clinit>(AttachAPI.java:45)
        at org.gridkit.lab.jvm.attach.AttachManager.<clinit>(AttachManager.java:73)
        at org.gridkit.jvmtool.JmxConnectionInfo.getMServer(JmxConnectionInfo.java:78)
        at org.gridkit.jvmtool.cmd.ThreadTopCmd$TTop.run(ThreadTopCmd.java:92)
        at org.gridkit.jvmtool.cli.CommandLauncher.start(CommandLauncher.java:133)
        at org.gridkit.jvmtool.SJK.main(SJK.java:11)
java.lang.NoClassDefFoundError: com/sun/tools/attach/VirtualMachine
        at org.gridkit.lab.jvm.attach.AttachManager$AttachManagerInt.getVmList(AttachManager.java:166)
        at org.gridkit.lab.jvm.attach.AttachManager$AttachManagerInt.getProcesssName(AttachManager.java:155)
        at org.gridkit.lab.jvm.attach.AttachManager$AttachManagerInt.internalGetDetails(AttachManager.java:150)
        at org.gridkit.lab.jvm.attach.AttachManager.getDetails(AttachManager.java:95)
        at org.gridkit.jvmtool.JmxConnectionInfo.getMServer(JmxConnectionInfo.java:78)
        at org.gridkit.jvmtool.cmd.ThreadTopCmd$TTop.run(ThreadTopCmd.java:92)
        at org.gridkit.jvmtool.cli.CommandLauncher.start(CommandLauncher.java:133)
        at org.gridkit.jvmtool.SJK.main(SJK.java:11)
Caused by: java.lang.ClassNotFoundException: com.sun.tools.attach.VirtualMachine
        at java.net.URLClassLoader.findClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        ... 8 more

I am sure I had correct set the JAVA home, and the path is C:\Program Files\Java\jdk1.8.0_181, how can I get this error message? Please help.

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aragozin avatar aragozin commented on July 22, 2024

Try where java (which on Linux). tools.jar is searched relative to java binary (not JAVA_HOME variable).

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zhonghuasheng avatar zhonghuasheng commented on July 22, 2024

Try where java (which on Linux). tools.jar is searched relative to java binary (not JAVA_HOME variable
I can successful run above cmd 'java -jar sjk-0.12-SNAPSHOT.jar ttop -p 6344 -n 20 -o CPU' in a Linux server, while failed in Windows server(using git-cmd to execute the cmd). And I am happy pass to install the JDK1.8, not sure what happened.

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aragozin avatar aragozin commented on July 22, 2024

Your PATH variable should point JDK/bin not JRE/bin

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zhonghuasheng avatar zhonghuasheng commented on July 22, 2024
  • My JAVA_HOME path
    image
  • Checked JAVA
    image
  • Execution result
    image

I am also confuse why it print my Java home to a JRE path? Not make sense.

BTW, the guy @941112341 changed to JAVA9 to avoid this.

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aragozin avatar aragozin commented on July 22, 2024

please execute where java

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zhonghuasheng avatar zhonghuasheng commented on July 22, 2024

image

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zhonghuasheng avatar zhonghuasheng commented on July 22, 2024

I see it point to jdk1.7, not 1.8

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aragozin avatar aragozin commented on July 22, 2024

where java should report java.exe from JDK on first line (ideally it should report single line)

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