ajermakovics / jvm-mon Goto Github PK

It's a cool tool, any shedule to support jdk 11?

The colors doesn't look too good when using solarized theme:

It's very hard to see.

How can I interpret the CPU and TotalCPU columns?
The screenshot is from my laptop and it certainly has less than 10 or ever 8 CPU cores :)

To avoid setting JAVA_HOME env var before launching

Perhaps using javax.tools.ToolProvider.getSystemToolClassLoader()
http://docs.oracle.com/javase/7/docs/api/javax/tools/ToolProvider.html#getSystemToolClassLoader()

Hi, i have IOException when profiling my app.
Look at screen.
https://ibb.co/hgMx4x

When I try to run a build of HEAD, I get the following:

$ bin/jvm-mon
Exception in thread "main" java.lang.NoClassDefFoundError: sun/jvmstat/monitor/MonitorException
	at com.jvmtop.view.VMOverviewView.scanForNewVMs(VMOverviewView.java:157)
	at JvmMon.update(JvmMon.java:38)
	at JvmMon.main(JvmMon.java:22)
Caused by: java.lang.ClassNotFoundException: sun.jvmstat.monitor.MonitorException
	at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
	... 3 more

$ java -version
java version "1.8.0_91"
Java(TM) SE Runtime Environment (build 1.8.0_91-b14)
Java HotSpot(TM) 64-Bit Server VM (build 25.91-b14, mixed mode)

$ uname -a
Darwin somehost.local 15.6.0 Darwin Kernel Version 15.6.0: Mon Jan  9 23:07:29 PST 2017; root:xnu-3248.60.11.2.1~1/RELEASE_X86_64 x86_64

To produce a single executable jar http://www.capsule.io

or maybe Packr https://github.com/libgdx/packr

I would like to be able to kill a java process from the monitor.

Would be great if it would be possible to distribute it using homebrew

Hi, I was curious if there is an option to load the program into a JVM and recieve data and collection to a database or log file? I wrote a pull request a while back and really like the concept.

objc[56636]: Class JavaLaunchHelper is implemented in both /Library/Java/JavaVirtualMachines/jdk1.8.0_73.jdk/Contents/Home/bin/java (0x10b6864c0) and /Library/Java/JavaVirtualMachines/jdk1.8.0_73.jdk/Contents/Home/jre/lib/libinstrument.dylib (0x11333f4e0). One of the two will be used. Which one is undefined.

I like the idea of jvm-mon, but it would be really useful if it displayed/monitored all the java processes running on a box (irrespective of user). If I run jvm-mon as root on my machine (Fedora 23) I would expect to be able to see all java processes running (they are available via jps), but this isn't the case.

Super cool! it's like htop for Java almost :-)
I would recommend having a look at this project:
https://github.com/aragozin/jvm-tools
In particular ttop would be a good drill down per process.

https://github.com/mum4k/termdash

It has some nice features like zooming into a chart.

Currently j2v8 extracts it's native library (libj2v8_linux_x86_64.so) to users home directory.
Should look into extracting it somewhere else, ideally project directory

I'm unable to start the application due to some IOException. There's also warnings related to stack guard:

bin/jvm-mon
OpenJDK 64-Bit Server VM warning: You have loaded library /home/minecraft/jvm-mon-0.3/libj2v8_linux_x86_64.so which might have disabled stack guard. The VM will try to fix the stack guard now.
It's highly recommended that you fix the library with 'execstack -c <libfile>', or link it with '-z noexecstack'.
java.io.IOException: well-known file is not secure
        at sun.tools.attach.LinuxVirtualMachine.checkPermissions(Native Method)
        at sun.tools.attach.LinuxVirtualMachine.<init>(LinuxVirtualMachine.java:117)
        at sun.tools.attach.LinuxAttachProvider.attachVirtualMachine(LinuxAttachProvider.java:63)
        at com.sun.tools.attach.VirtualMachine.attach(VirtualMachine.java:208)
        at com.jvmtop.openjdk.tools.LocalVirtualMachine.loadManagementAgent(LocalVirtualMachine.java:341)
        at com.jvmtop.openjdk.tools.LocalVirtualMachine.startManagementAgent(LocalVirtualMachine.java:141)
        at com.jvmtop.openjdk.tools.ProxyClient.tryConnect(ProxyClient.java:372)
        at com.jvmtop.openjdk.tools.ProxyClient.connect(ProxyClient.java:354)
        at com.jvmtop.monitor.VMInfo.attachToVM(VMInfo.java:219)
        at com.jvmtop.monitor.VMInfo.processNewVM(VMInfo.java:186)
        at com.jvmtop.view.VMOverviewView.scanForNewVMs(VMOverviewView.java:176)
        at JvmMon.update(JvmMon.java:50)
        at JvmMon.<init>(JvmMon.java:45)
        at JvmMon.main(JvmMon.java:27)

This is on CentOS Linux release 7.4.1708 (Core)
with
openjdk version "1.8.0_161"
OpenJDK Runtime Environment (build 1.8.0_161-b14)
OpenJDK 64-Bit Server VM (build 25.161-b14, mixed mode)

Dear ajermakovics,

I get a "IndexOutOfBoundsException: Index: 0, Size: 0" on running jvm-mon-0.3/bin/jvm-mon.

./jvm-mon-0.3/bin/jvm-mon
OpenJDK 64-Bit Server VM warning: You have loaded library /tmp/java-monitoring/jvm-mon-0.3/libj2v8_linux_x86_64.so which might have disabled stack guard. The VM will try to fix the stack guard now.
It's highly recommended that you fix the library with 'execstack -c ', or link it with '-z noexecstack'.
Exception in thread "main" java.lang.IndexOutOfBoundsException: Index: 0, Size: 0
at java.util.ArrayList.rangeCheck(ArrayList.java:653)
at java.util.ArrayList.get(ArrayList.java:429)
at JvmMon.(JvmMon.java:46)
at JvmMon.main(JvmMon.java:27)

My Env

cat /etc/*-release
PRETTY_NAME="Debian GNU/Linux 8 (jessie)"
NAME="Debian GNU/Linux"
VERSION_ID="8"
VERSION="8 (jessie)"
ID=debian

java -version
openjdk version "1.8.0_121"
OpenJDK Runtime Environment (build 1.8.0_121-8u121-b13-1~bpo8+1-b13)
OpenJDK 64-Bit Server VM (build 25.121-b13, mixed mode)

echo $JAVA_HOME
/usr/lib/jvm/java-8-openjdk-amd64

Could you help?

best regards

Would be useful to view JVM process classpath and parameters like VisualVM does it

This maybe a little weird but it's really happening and I don't realize why.

Just launching bin/jvm-mon with:

• jvm-mon version 0.3
• java version "1.8.0_171"
  Java(TM) SE Runtime Environment (build 1.8.0_171-b11)
  Java HotSpot(TM) 64-Bit Server VM (build 25.171-b11, mixed mode)
• Linux localhost 3.13.0-24-generic #46-Ubuntu SMP Thu Apr 10 19:11:08 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
• Ubuntu 14.04 LTS

java.rmi.ConnectIOException: Exception creating connection to: 192.168.0.150; nested exception is:
	java.net.NoRouteToHostException: No route to host (Host unreachable)
	at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:631)
	at sun.rmi.transport.tcp.TCPChannel.createConnection(TCPChannel.java:216)
	at sun.rmi.transport.tcp.TCPChannel.newConnection(TCPChannel.java:202)
	at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:129)
	at java.rmi.server.RemoteObjectInvocationHandler.invokeRemoteMethod(RemoteObjectInvocationHandler.java:227)
	at java.rmi.server.RemoteObjectInvocationHandler.invoke(RemoteObjectInvocationHandler.java:179)
	at com.sun.proxy.$Proxy0.newClient(Unknown Source)
	at javax.management.remote.rmi.RMIConnector.getConnection(RMIConnector.java:2430)
	at javax.management.remote.rmi.RMIConnector.connect(RMIConnector.java:308)
	at javax.management.remote.JMXConnectorFactory.connect(JMXConnectorFactory.java:270)
	at javax.management.remote.JMXConnectorFactory.connect(JMXConnectorFactory.java:229)
	at com.jvmtop.openjdk.tools.ProxyClient.tryConnect(ProxyClient.java:392)
	at com.jvmtop.openjdk.tools.ProxyClient.connect(ProxyClient.java:354)
	at com.jvmtop.monitor.VMInfo.attachToVM(VMInfo.java:219)
	at com.jvmtop.monitor.VMInfo.processNewVM(VMInfo.java:186)
	at com.jvmtop.view.VMOverviewView.scanForNewVMs(VMOverviewView.java:176)
	at JvmMon.update(JvmMon.java:50)
	at JvmMon.<init>(JvmMon.java:45)
	at JvmMon.main(JvmMon.java:27)
Caused by: java.net.NoRouteToHostException: No route to host (Host unreachable)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at java.net.Socket.connect(Socket.java:538)
	at java.net.Socket.<init>(Socket.java:434)
	at java.net.Socket.<init>(Socket.java:211)
	at sun.rmi.transport.proxy.RMIDirectSocketFactory.createSocket(RMIDirectSocketFactory.java:40)
	at sun.rmi.transport.proxy.RMIMasterSocketFactory.createSocket(RMIMasterSocketFactory.java:148)
	at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:613)
	... 18 more

Interfaces Ip addr:

ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: em1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
    link/ether f4:03:43:57:41:6c brd ff:ff:ff:ff:ff:ff
    inet 192.168.0.200/24 brd 192.168.0.255 scope global em1
       valid_lft forever preferred_lft forever
    inet6 fe80::f603:43ff:fe57:416c/64 scope link
       valid_lft forever preferred_lft forever
3: em2: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether f4:03:43:57:41:6d brd ff:ff:ff:ff:ff:ff
4: em3: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether f4:03:43:57:41:6e brd ff:ff:ff:ff:ff:ff
5: em4: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether f4:03:43:57:41:6f brd ff:ff:ff:ff:ff:ff

Kernel IP routing table

Kernel IP routing table
Destination     Gateway         Genmask         Flags   MSS Window  irtt Iface
0.0.0.0         192.168.0.1     0.0.0.0         UG        0 0          0 em1
192.168.0.0     0.0.0.0         255.255.255.0   U         0 0          0 em1

Hello, very nice console app!
Is there a way to monitor remote JVM, i.e over JMX?
I have jvm apps on remote but with JRE only and cant install JDK there

Executing from a VM, unzipped package, CentOS 6

Java HotSpot(TM) 64-Bit Server VM warning: You have loaded library /home/rss/libj2v8_linux_x86_64.so which might have disabled stack guard. The VM will try to fix the stack guard now.
It's highly recommended that you fix the library with 'execstack -c <libfile>', or link it with '-z noexecstack'.
Exception in thread "main" java.lang.ExceptionInInitializerError
Caused by: java.lang.IllegalStateException: J2V8 native library not loaded
	at com.eclipsesource.v8.V8.checkNativeLibraryLoaded(V8.java:195)
	at com.eclipsesource.v8.V8.createV8Runtime(V8.java:149)
	at com.eclipsesource.v8.V8.createV8Runtime(V8.java:125)
	at com.eclipsesource.v8.NodeJS.createNodeJS(NodeJS.java:58)
	at com.eclipsesource.v8.NodeJS.createNodeJS(NodeJS.java:45)
	at JvmMon.<clinit>(JvmMon.java:12)
Caused by: java.lang.UnsatisfiedLinkError: Could not load J2V8 library. Reasons:
	no j2v8_linux_x86_64 in java.library.path
	/home/rss/libj2v8_linux_x86_64.so: /usr/lib64/libstdc++.so.6: version `GLIBCXX_3.4.15' not found (required by /home/rss/libj2v8_linux_x86_64.so)

	at com.eclipsesource.v8.LibraryLoader.loadLibrary(LibraryLoader.java:75)
	at com.eclipsesource.v8.V8.load(V8.java:71)
	at com.eclipsesource.v8.V8.createV8Runtime(V8.java:145)
	... 4 more

Hi, during the startup I get the "You have loaded library...." message, then my console is cleared and nothing is shown.

When I CTRL-C, my console is not usable, since there is only 1 line available. On the screenshot there is an OLD line written, then Enter, then NEW written:

Any ideas? I work on Windows, using Cygwin consoles managed by ConEmu 64

Possible hint: I got I working the first time! But since then never again...

I got the following error while running jvm-mon. Not sure if there are logs I can inspect or not.

$ jvm-mon
TypeError: Cannot read property 'Id' of undefined
    at renderVmCharts (/usr/local/Cellar/jvm-mon/0.3/libexec/jvm-mon.js:174:25)
    at addData (/usr/local/Cellar/jvm-mon/0.3/libexec/jvm-mon.js:150:9)
    at Timeout._repeat (/usr/local/Cellar/jvm-mon/0.3/libexec/jvm-mon.js:204:5)
    at Timeout.wrapper [as _onTimeout] (timers.js:408:11)
    at tryOnTimeout (timers.js:224:11)
    at Timer.listOnTimeout (timers.js:198:5)

Hey,

I downloaded your tar, extracted it, did the configuration for Java, and when I executed jvm-mon, here is the error I got :

OpenJDK 64-Bit Server VM warning: You have loaded library /home/tristan/libj2v8_linux_x86_64.so which might have disabled stack guard. The VM will try to fix the stack guard now.
It's highly recommended that you fix the library with 'execstack -c <libfile>', or link it with '-z noexecstack'.

node.js:376
        callback();
        ^
module.js:341: Error: Cannot find module '/home/tristan/Téléchargements/jvm-mon-0.1/bin/src/dist/jvm-mon.js'

In the new Go version

So that newly started processes also appear in the list and exited processes disappear.
Atm it only shows processes that were already running.

(base) ➜ jvm-mon git:(master) ✗ ./gradlew npmDeps

Task :npmDeps
npm WARN saveError ENOENT: no such file or directory, open '/Users/develop/jvm-mon/package.json'
npm notice created a lockfile as package-lock.json. You should commit this file.
npm WARN enoent ENOENT: no such file or directory, open '/Users/develop/jvm-mon/package.json'
npm WARN jvm-mon No description
npm WARN jvm-mon No repository field.
npm WARN jvm-mon No README data
npm WARN jvm-mon No license field.

• [email protected]
• [email protected]
  updated 2 packages in 1.022s

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BUILD SUCCESSFUL in 2s
1 actionable task: 1 executed
(base) ➜ jvm-mon git:(master) ✗ ./build/install/jvm-mon/bin/jvm-mon
java.io.IOException: Management agent not found
at com.jvmtop.openjdk.tools.LocalVirtualMachine.loadManagementAgent(LocalVirtualMachine.java:365)
at com.jvmtop.openjdk.tools.LocalVirtualMachine.startManagementAgent(LocalVirtualMachine.java:141)
at com.jvmtop.openjdk.tools.ProxyClient.tryConnect(ProxyClient.java:372)
at com.jvmtop.openjdk.tools.ProxyClient.connect(ProxyClient.java:354)
at com.jvmtop.monitor.VMInfo.attachToVM(VMInfo.java:219)
at com.jvmtop.monitor.VMInfo.processNewVM(VMInfo.java:186)
at com.jvmtop.view.VMOverviewView.scanForNewVMs(VMOverviewView.java:176)
at jvmmon.JvmStats.update(JvmStats.kt:32)
at jvmmon.JvmStats.update$default(JvmStats.kt:31)
at jvmmon.JvmStats.(JvmStats.kt:15)
at JvmMon.(JvmMon.kt:12)
at JvmMon$Companion.main(JvmMon.kt:28)
at JvmMon.main(JvmMon.kt)
java.io.IOException: Management agent not found
at com.jvmtop.openjdk.tools.LocalVirtualMachine.loadManagementAgent(LocalVirtualMachine.java:365)
at com.jvmtop.openjdk.tools.LocalVirtualMachine.startManagementAgent(LocalVirtualMachine.java:141)
at com.jvmtop.openjdk.tools.ProxyClient.tryConnect(ProxyClient.java:372)
at com.jvmtop.openjdk.tools.ProxyClient.connect(ProxyClient.java:354)
at com.jvmtop.monitor.VMInfo.attachToVM(VMInfo.java:219)
at com.jvmtop.monitor.VMInfo.processNewVM(VMInfo.java:186)
at com.jvmtop.view.VMOverviewView.scanForNewVMs(VMOverviewView.java:176)
at jvmmon.JvmStats.update(JvmStats.kt:32)
at jvmmon.JvmStats.update$default(JvmStats.kt:31)
at jvmmon.JvmStats.(JvmStats.kt:15)
at JvmMon.(JvmMon.kt:12)
at JvmMon$Companion.main(JvmMon.kt:28)
at JvmMon.main(JvmMon.kt)
java.io.IOException: Management agent not found
at com.jvmtop.openjdk.tools.LocalVirtualMachine.loadManagementAgent(LocalVirtualMachine.java:365)
at com.jvmtop.openjdk.tools.LocalVirtualMachine.startManagementAgent(LocalVirtualMachine.java:141)
at com.jvmtop.openjdk.tools.ProxyClient.tryConnect(ProxyClient.java:372)
at com.jvmtop.openjdk.tools.ProxyClient.connect(ProxyClient.java:354)
at com.jvmtop.monitor.VMInfo.attachToVM(VMInfo.java:219)
at com.jvmtop.monitor.VMInfo.processNewVM(VMInfo.java:186)
at com.jvmtop.view.VMOverviewView.scanForNewVMs(VMOverviewView.java:176)
at jvmmon.JvmStats.update(JvmStats.kt:32)
at jvmmon.JvmStats.update$default(JvmStats.kt:31)
at jvmmon.JvmStats.(JvmStats.kt:15)
at JvmMon.(JvmMon.kt:12)
at JvmMon$Companion.main(JvmMon.kt:28)
at JvmMon.main(JvmMon.kt)

node.js:376
callback();
^
/Users/develop/jvm-mon/build/install/jvm-mon/node_modules/marked-terminal/index.cjs:23: SyntaxError: Unexpected token =
(base) ➜ jvm-mon git:(master) ✗ SyntaxError: Unexpected token =

Should be a matter of adding the right J2V8 dependency

How can I get plotted values of heap usage graph in text file ( possibly comma separated ) ?
Also, I couldn't understand how exactly are you getting/calculating those values for plotting ? Can you please tell this approach, that would be more beneficial for me.
Thanks in advance, means a lot.

Once memory and cpu chart reaches end it stops updating.

Workaround: switch to another process and back