Skip to content

Tab contrast too low #649

Open
Open
Tab contrast too low#649
Labels
bug

Description

@CTimmerman
CTimmerman
opened on Oct 24, 2025

Describe the bug
I find it hard to see which tab is active.

To Reproduce
Steps to reproduce the behavior:

  1. Select a JVM process.
  2. Click on Sampler.
  3. Wonder what you're looking at as there is barely any indication of which tab is active.

Expected behavior
A clearly visible indication of which tab is the active one.

Screenshots

Image

Desktop (please complete the following information):

  • OS: Windows 11 Home 24H2 26100.6899 Windows Feature Experience Pack 1000.26100.253.0 (dark mode)
  • JDK version: I can't even find the JRE version in VisualVM 2.2; Windows Settings, Apps, Installed apps, "java" shows only "Java(TM) SE Development Kit 24 (64-bit) 24.0.0.0 | Oracle Corporation | 31-3-2025 386 MB". Clicking the "Heap Dump" label on the Sampler tab shows Java Home/Version: ...can't copy the value, but "VS Code extension RedHat Java OpenJDK 64-bit Server VM (21.0.8+9-LTS, mixed mode, sharing)"
  • Version: 2.2

About, Details, Copy to Clipboard:


Version: 

2.2 (Build 250417); platform 20250323-0d0bfcf3fa

System: 

Windows 11 (10.0) , amd64 64bit

Java: 

24; Java HotSpot(TM) 64-Bit Server VM (24+36-3646, mixed mode, sharing)

Vendor: 

Oracle Corporation, https://java.oracle.com/

Environment: 

UTF-8; en_US (visualvm)

User directory: 

C:\Users\C\AppData\Roaming\VisualVM\2.2

Cache directory: 

C:\Users\C\AppData\Local\VisualVM\Cache\2.2

Clusters: 

C:\apps\visualvm_22\platform
C:\apps\visualvm_22\visualvm

Additional context
ChatGPT said this tool was the best free one for finding memory leaks, but there's an error when clicking the Memory button in the Profiler section:

Image

The VisualVM Logfile in the About dialog shows a third Java version as well:

-------------------------------------------------------------------------------
>Log Session: Friday, October 24, 2025, 11:36:11 AM Central European Summer Time
>System Info: 
  Product Version         = VisualVM 2.2
  Operating System        = Windows 11 version 10.0 running on amd64
  Java; VM; Vendor        = 24; Java HotSpot(TM) 64-Bit Server VM 24+36-3646; Oracle Corporation
  Runtime                 = Java(TM) SE Runtime Environment 24+36-3646
  Java Home               = C:\Program Files\Java\jdk-24
  System Locale; Encoding = en_US (visualvm); UTF-8
  Home Directory          = C:\Users\C
  Current Directory       = C:\apps\visualvm_22\bin
  User Directory          = C:\Users\C\AppData\Roaming\VisualVM\2.2
  Cache Directory         = C:\Users\C\AppData\Local\VisualVM\Cache\2.2
  Installation            = C:\apps\visualvm_22\visualvm
                            C:\apps\visualvm_22\platform
  Boot & Ext. Classpath   = 
  Application Classpath   = C:\apps\visualvm_22\platform\lib\boot.jar;C:\apps\visualvm_22\platform\lib\org-openide-modules.jar;C:\apps\visualvm_22\platform\lib\org-openide-util-lookup.jar;C:\apps\visualvm_22\platform\lib\org-openide-util-ui.jar;C:\apps\visualvm_22\platform\lib\org-openide-util.jar
  Startup Classpath       = C:\apps\visualvm_22\platform\core\asm-9.7.jar;C:\apps\visualvm_22\platform\core\asm-commons-9.7.jar;C:\apps\visualvm_22\platform\core\asm-tree-9.7.jar;C:\apps\visualvm_22\platform\core\core-base.jar;C:\apps\visualvm_22\platform\core\core.jar;C:\apps\visualvm_22\platform\core\org-netbeans-libs-asm.jar;C:\apps\visualvm_22\platform\core\org-openide-filesystems.jar;C:\apps\visualvm_22\visualvm\core\org-graalvm-visualvm-modules-startup.jar;C:\apps\visualvm_22\visualvm\core\locale\core_visualvm.jar
-------------------------------------------------------------------------------
INFO [org.graalvm.visualvm.modules.startup.ImportSettings]: Skipping import, no supported userdirs found in: C:\Users\C\AppData\Roaming\VisualVM
INFO [org.netbeans.core.startup.NbEvents]: Turning on modules:
	org.openide.util.lookup [8.58 20250323-0d0bfcf3fa]
	org.openide.util [9.32 20250323-0d0bfcf3fa]
	org.openide.util.ui [9.33 20250323-0d0bfcf3fa]
	org.openide.modules [7.72 20250323-0d0bfcf3fa]
	org.netbeans.api.annotations.common/1 [1.52 20250323-0d0bfcf3fa]
	org.openide.filesystems [9.37 20250323-0d0bfcf3fa]
	org.openide.awt [7.92 20250323-0d0bfcf3fa]
	org.netbeans.api.progress/1 [1.72 20250323-0d0bfcf3fa]
	org.netbeans.api.progress.nb [1.72 20250323-0d0bfcf3fa]
	org.openide.dialogs [7.71 20250323-0d0bfcf3fa]
	org.openide.nodes [7.69 20250323-0d0bfcf3fa]
	org.openide.windows [6.101 20250323-0d0bfcf3fa]
	org.netbeans.modules.editor.mimelookup/1 [1.64 20250323-0d0bfcf3fa]
	org.openide.text [6.92 20250323-0d0bfcf3fa]
	org.netbeans.api.scripting [1.21 20250323-0d0bfcf3fa]
	org.netbeans.swing.tabcontrol [1.81 20250323-0d0bfcf3fa]
	org.netbeans.swing.outline [1.58 20250323-0d0bfcf3fa]
	org.openide.explorer [6.86 20250323-0d0bfcf3fa]
	org.openide.actions [6.63 20250323-0d0bfcf3fa]
	org.netbeans.modules.queries/1 [1.67 20250323-0d0bfcf3fa]
	org.netbeans.api.templates [1.32 20250323-0d0bfcf3fa]
	org.openide.filesystems.nb [9.34 20250323-0d0bfcf3fa]
	org.openide.loaders [7.94 20250323-0d0bfcf3fa]
	org.netbeans.api.intent [1.26 20250323-0d0bfcf3fa]
	org.netbeans.api.io [1.27 20250323-0d0bfcf3fa]
	org.openide.io [1.73 20250323-0d0bfcf3fa]
	org.netbeans.swing.plaf [1.66 20250323-0d0bfcf3fa]
	org.netbeans.modules.keyring [1.48 20250323-0d0bfcf3fa]
	org.netbeans.libs.asm [5.27 20250323-0d0bfcf3fa]
	org.netbeans.bootstrap/1 [2.103 20250323-0d0bfcf3fa]
	org.netbeans.core.startup.base [1.86.0.1 1 20250323-0d0bfcf3fa]
	org.netbeans.core.startup/1 [1.87.0.1 20250323-0d0bfcf3fa]
	org.netbeans.modules.sampler [1.38 20250323-0d0bfcf3fa]
	org.netbeans.core/2 [3.75 20250323-0d0bfcf3fa]
	org.netbeans.spi.quicksearch [1.51 20250323-0d0bfcf3fa]
	org.netbeans.modules.options.api/1 [1.69 20250323-0d0bfcf3fa]
	org.netbeans.libs.flatlaf/1 [1.18 3.3 20250323-0d0bfcf3fa]
	org.netbeans.swing.laf.flatlaf [1.17 20250323-0d0bfcf3fa]
	org.netbeans.modules.settings/1 [1.73 20250323-0d0bfcf3fa]
	org.netbeans.modules.sendopts/2 [2.60 20250323-0d0bfcf3fa]
	org.netbeans.modules.progress.ui [1.57 20250323-0d0bfcf3fa]
	org.netbeans.modules.options.keymap [1.61 20250323-0d0bfcf3fa]
	org.netbeans.libs.jna/2 [2.19 20250323-0d0bfcf3fa]
	org.netbeans.modules.masterfs/2 [2.79.0.2 2 20250323-0d0bfcf3fa]
	org.netbeans.modules.masterfs.windows [1.40 20250323-0d0bfcf3fa]
	org.netbeans.modules.masterfs.ui [2.27.0.2 20250323-0d0bfcf3fa]
	org.netbeans.modules.masterfs.nio2 [1.39 20250323-0d0bfcf3fa]
	org.netbeans.modules.keyring.fallback [1.32 20250323-0d0bfcf3fa]
	org.netbeans.modules.keyring.impl [1.48 20250323-0d0bfcf3fa]
	org.netbeans.modules.editor.mimelookup.impl/1 [1.56 20250323-0d0bfcf3fa]
	org.netbeans.modules.autoupdate.services [1.80 20250323-0d0bfcf3fa]
	org.netbeans.modules.autoupdate.ui [1.70 20250323-0d0bfcf3fa]
	org.netbeans.modules.autoupdate.cli [1.38 20250323-0d0bfcf3fa]
	org.netbeans.libs.jna.platform/2 [2.19 20250323-0d0bfcf3fa]
	org.netbeans.core.windows/2 [2.109 20250323-0d0bfcf3fa]
	org.netbeans.core.ui/1 [1.69 20250323-0d0bfcf3fa]
	org.netbeans.core.network [1.36 20250323-0d0bfcf3fa]
	org.netbeans.core.nativeaccess/1 [1.55 20250323-0d0bfcf3fa]
	org.netbeans.core.multitabs/1 [1.36.0.1 1 20250323-0d0bfcf3fa]
	org.netbeans.core.io.ui/1 [1.54 20250323-0d0bfcf3fa]
	org.graalvm.visualvm.lib.jfluid/2 [2.19 250417]
	org.graalvm.visualvm.lib.charts/2 [2.1 250417]
	org.graalvm.visualvm.lib.common/2 [2.12 250417]
	org.graalvm.visualvm.lib.profiler.api/2 [2.2 250417]
	org.graalvm.visualvm.lib.ui/2 [2.4 250417]
	org.graalvm.visualvm.uisupport/2 [2.1 250417]
	org.graalvm.visualvm.core/2 [2.4 250417]
	org.graalvm.visualvm.host/2 [2.1 250417]
	org.graalvm.visualvm.application/2 [2.4 250417]
	org.graalvm.visualvm.tools/2 [2.4 250417]
	org.graalvm.visualvm.coredump/2 [2.1 250417]
	org.graalvm.visualvm.threaddump/2 [2.1 250417]
	org.graalvm.visualvm.lib.profiler.utilities/2 [2.0 250417]
	org.graalvm.visualvm.lib.profiler.attach/2 [2.4 250417]
	org.graalvm.visualvm.lib.profiler/2 [2.4 250417]
	org.graalvm.visualvm.lib.profiler.snaptracer/2 [2.0 250417]
	org.graalvm.visualvm.profiling/2 [2.3 250417]
	org.graalvm.visualvm.lib.jfluid.heap [1.3 250417]
	org.graalvm.visualvm.lib.profiler.oql/2 [2.0 250417]
	org.graalvm.visualvm.lib.profiler.heapwalker/2 [2.2 250417]
	org.graalvm.visualvm.heapviewer/2 [2.8 250417]
	org.graalvm.visualvm.heapdump/2 [2.1 250417]
	org.graalvm.visualvm.sampler.truffle/2 [2.1 250417]
	org.graalvm.visualvm.sampler/2 [2.2 250417]
	org.graalvm.visualvm.sa/2 [2.0 250417]
	org.graalvm.visualvm.modules.startup/2 [2.1 250417]
	org.graalvm.visualvm.profiler/2 [2.1 250417]
	org.graalvm.visualvm.pluginimporter [1.0 250417]
	org.graalvm.visualvm.nashorn.jdk15 [1.1 250417]
	org.graalvm.visualvm.modules.killapp/1 [1.2 250417]
	org.graalvm.visualvm.modules.appui/2 [2.1 250417]
	org.graalvm.visualvm.jvmstat/2 [2.0 250417]
	org.graalvm.visualvm.jvm/2 [2.0 250417]
	org.graalvm.visualvm.jmx/2 [2.2 250417]
	org.graalvm.visualvm.charts/2 [2.1 250417]
	org.graalvm.visualvm.jfr/2 [2.3 250417]
	org.graalvm.visualvm.jfr.jdk11/2 [2.2 250417]
	org.graalvm.visualvm.jfr.generic/2 [2.5 250417]
	org.graalvm.visualvm.host.views/2 [2.0 250417]
	org.graalvm.visualvm.host.remote/2 [2.0 250417]
	org.graalvm.visualvm.heapviewer.truffle/2 [2.1 250417]
	org.graalvm.visualvm.heapviewer.console/2 [2.0 250417]
	org.graalvm.visualvm.application.views/2 [2.1 250417]
	org.graalvm.visualvm.graalvm/2 [2.0 250417]
	org.graalvm.visualvm.gotosource/2 [2.0 250417]
	org.graalvm.visualvm.attach/2 [2.0 250417]
INFO [org.netbeans.core.network.proxy.NetworkProxyReloader]: System network proxy resolver: Windows
INFO [org.netbeans.core.network.proxy.windows.WindowsNetworkProxy]: Windows system proxy resolver: auto detect
INFO [org.netbeans.core.network.proxy.windows.WindowsNetworkProxy]: Windows system proxy resolver: auto - PAC (http://wpad/wpad.dat)
INFO [org.netbeans.core.network.proxy.NetworkProxyReloader]: System network proxy reloading succeeded.
INFO [org.netbeans.ui.metrics.laf]: USG_LOOK_AND_FEEL
Diagnostic information
Input arguments:
	-Xms24m
	-Xmx768m
	-Dnetbeans.accept_license_class=org.graalvm.visualvm.modules.startup.AcceptLicense
	-Dnetbeans.importclass=org.graalvm.visualvm.modules.startup.ImportSettings
	-Dsun.jvmstat.perdata.syncWaitMs=10000
	-Dsun.java2d.noddraw=true
	-Dsun.java2d.d3d=false
	-DTopSecurityManager.disable=true
	-Dorg.netbeans.core.TimeableEventQueue.quantum=360000
	-Dpolyglot.js.nashorn-compat=true
	-Dsun.misc.URLClassPath.disableJarChecking=true
	-Djdk.attach.allowAttachSelf=true
	-Dorg.openide.util.ImageUtilities.level=950
	--add-exports=java.desktop/com.sun.java.swing.plaf.gtk=ALL-UNNAMED
	--add-exports=java.desktop/sun.awt=ALL-UNNAMED
	--add-exports=jdk.internal.jvmstat/sun.jvmstat.monitor.event=ALL-UNNAMED
	--add-exports=jdk.internal.jvmstat/sun.jvmstat.monitor=ALL-UNNAMED
	--add-exports=java.desktop/sun.swing=ALL-UNNAMED
	--add-exports=jdk.attach/sun.tools.attach=ALL-UNNAMED
	--add-opens=java.desktop/sun.awt.X11=ALL-UNNAMED
	--add-opens=java.desktop/javax.swing.plaf.synth=ALL-UNNAMED
	--add-opens=java.base/java.net=ALL-UNNAMED
	--add-opens=java.base/java.lang.ref=ALL-UNNAMED
	--add-opens=java.base/java.lang=ALL-UNNAMED
	--add-opens=java.desktop/javax.swing=ALL-UNNAMED
	--add-opens=java.desktop/javax.swing.plaf.basic=ALL-UNNAMED
	-XX:+IgnoreUnrecognizedVMOptions
	-Djdk.home=C:\Program Files\Java\jdk-24
	-Dnetbeans.home=C:\apps\visualvm_22\platform
	-Dnetbeans.user=C:\Users\C\AppData\Roaming\VisualVM\2.2
	-Dnetbeans.default_userdir_root=C:\Users\C\AppData\Roaming\VisualVM
	-XX:+HeapDumpOnOutOfMemoryError
	-XX:HeapDumpPath=C:\Users\C\AppData\Roaming\VisualVM\2.2\var\log\heapdump.hprof
	-Dsun.awt.keepWorkingSetOnMinimize=true
	-Dnetbeans.dirs=C:\apps\visualvm_22\visualvm
Compiler: HotSpot 64-Bit Tiered Compilers
Heap memory usage: initial 24,0MB maximum 768,0MB
Non heap memory usage: initial 7,3MB maximum -1b
Garbage collector: G1 Young Generation (Collections=15 Total time spent=0s)
Garbage collector: G1 Concurrent GC (Collections=10 Total time spent=0s)
Garbage collector: G1 Old Generation (Collections=0 Total time spent=0s)
Classes: loaded=6169 total loaded=6169 unloaded 0
INFO [org.netbeans.core.ui.warmup.DiagnosticTask]: Total memory 68.556.128.256
INFO [null]: Total physical memory 68.556.128.256
INFO [org.netbeans.core.network.proxy.ProxyAutoConfig]: PAC script http://wpad/wpad.dat unavailable, proxy disabled
INFO [org.netbeans.core.network.proxy.NetworkProxyReloader]: System network proxy - mode: auto
INFO [org.netbeans.core.network.proxy.NetworkProxyReloader]: System network proxy - pac url: http://wpad/wpad.dat
INFO [org.netbeans.core.network.proxy.NetworkProxyReloader]: System network proxy TEST - http host: 
INFO [org.netbeans.core.network.proxy.NetworkProxyReloader]: System network proxy TEST - http port: 0
*** Profiler message (Fri Oct 24 11:38:55 CEST 2025): Starting target application...
C:\Users\C\.vscode\extensions\redhat.java-1.46.0-win32-x64\jre\21.0.8-win32-x86_64\bin\java.exe -agentpath:C:/apps/visualvm_22/visualvm/lib/deployed/jdk16/windows-amd64/profilerinterface.dll -Xbootclasspath/a:C:\apps\visualvm_22\visualvm\lib\jfluid-server.jar;C:\apps\visualvm_22\visualvm\lib\jfluid-server-15.jar org.graalvm.visualvm.lib.jfluid.server.ProfilerServer C:/apps/visualvm_22/visualvm/lib/deployed/jdk16/windows-amd64 5141 10 ____Profiler+Calibration+Run____
WARNING [org.graalvm.visualvm.lib.profiler.NetBeansProfiler]: Could not find a CCT provider in lookup!
takeHeapDump: Dumping heap to C:\Users\C\AppData\Local\Temp\visualvm_C.dat\localhost_10856\heapdump-1761298833487.hprof ...
Heap dump file created [383193108 bytes in 0.403 secs]
takeHeapDump: Dumping heap to C:\Users\C\AppData\Local\Temp\visualvm_C.dat\localhost_10856\heapdump-1761299777194.hprof ...
Heap dump file created [603803844 bytes in 0.867 secs]

Activity

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment

Metadata

Metadata

Assignees

No one assigned

    Labels

    bug

    Type

    No type

    Projects

    No projects

      Milestone

      No milestone

      Relationships

      None yet

      Development

      No branches or pull requests

      Issue actions