oracle / oracle/visualvm

Clicking a running application causes VisualVM to freeze

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Description

Describe the bug
Clicking (Both left- and right-clicking) a running local application causes VisualVM to freeze.

To Reproduce
This will probably not reproduce it for you, but it's all I did

  1. Open VisualVM
  2. Start other Java Application (from command line)
  3. VisualVM displays the running application
  4. Click the application in the list in VisualVM
  5. VisualVM freezes for ~60 seconds
  6. After VisualVM unfreezes, it shows "Opening (PID ...) in the bottom right corner
  7. A couple of seconds later, it displays an error icon in the bottom right corner
  8. Clicking that icon reveals this error text:
java.lang.NullPointerException: Cannot invoke "java.util.Properties.getProperty(String, String)" because "props" is null
	at org.graalvm.visualvm.sampler.truffle.SamplerSupport.isRunningOnGraalVM(SamplerSupport.java:86)
	at org.graalvm.visualvm.sampler.truffle.SamplerSupport.supportsProfiling(SamplerSupport.java:65)
	at org.graalvm.visualvm.sampler.truffle.ApplicationSamplerViewProvider.supportsViewFor(ApplicationSamplerViewProvider.java:40)
	at org.graalvm.visualvm.sampler.truffle.ApplicationSamplerViewProvider.supportsViewFor(ApplicationSamplerViewProvider.java:37)
	at org.graalvm.visualvm.core.ui.DataSourceViewsManager.getViews(DataSourceViewsManager.java:136)
	at org.graalvm.visualvm.core.ui.DataSourceWindowManager.openWindowAndAddView(DataSourceWindowManager.java:262)
	at org.graalvm.visualvm.core.ui.DataSourceWindowManager.access$000(DataSourceWindowManager.java:52)
	at org.graalvm.visualvm.core.ui.DataSourceWindowManager$2.run(DataSourceWindowManager.java:121)
	at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1418)
	at org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:45)
	at org.openide.util.lookup.Lookups.executeWith(Lookups.java:278)
[catch] at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2033)

Expected behavior
VisualVM should open the view for this running process

VisualVM log

Click to expand 
-------------------------------------------------------------------------------
>Log Session: Sunday, December 19, 2021 at 11:54:20 PM Central European Standard Time
>System Info: 
  Product Version         = VisualVM 2.1
  Operating System        = Linux version 5.15.7-arch1-1 running on amd64
  Java; VM; Vendor        = 17.0.1; OpenJDK 64-Bit Server VM 17.0.1+12; N/A
  Runtime                 = OpenJDK Runtime Environment 17.0.1+12
  Java Home               = /usr/lib/jvm/java-17-openjdk
  System Locale; Encoding = de_DE (visualvm); UTF-8
  Home Directory          = /home/user
  Current Directory       = /home/user
  User Directory          = /home/user/.visualvm/2.1
  Cache Directory         = /home/user/.cache/visualvm/2.1
  Installation            = /usr/share/visualvm/visualvm
                            /usr/share/visualvm/platform
  Boot & Ext. Classpath   = 
  Application Classpath   = /usr/share/visualvm/platform/lib/boot.jar:/usr/share/visualvm/platform/lib/org-openide-modules.jar:/usr/share/visualvm/platform/lib/org-openide-util.jar:/usr/share/visualvm/platform/lib/org-openide-util-lookup.jar:/usr/share/visualvm/platform/lib/org-openide-util-ui.jar
  Startup Classpath       = /usr/share/visualvm/platform/core/core-base.jar:/usr/share/visualvm/platform/core/asm-commons-8.0.1.jar:/usr/share/visualvm/platform/core/core.jar:/usr/share/visualvm/platform/core/org-netbeans-libs-asm.jar:/usr/share/visualvm/platform/core/asm-8.0.1.jar:/usr/share/visualvm/platform/core/org-openide-filesystems.jar:/usr/share/visualvm/platform/core/asm-tree-8.0.1.jar:/usr/share/visualvm/visualvm/core/org-graalvm-visualvm-modules-startup.jar:/usr/share/visualvm/visualvm/core/locale/core_visualvm.jar
-------------------------------------------------------------------------------
INFO [org.netbeans.core.startup.NbEvents]: Turning on modules:
	org.openide.util.lookup [8.46 20210621-2172674416]
	org.openide.util [9.19 20210621-2172674416]
	org.openide.util.ui [9.20 20210621-2172674416]
	org.openide.modules [7.60 20210621-2172674416]
	org.netbeans.api.annotations.common/1 [1.40 20210621-2172674416]
	org.openide.filesystems [9.23 20210621-2172674416]
	org.openide.awt [7.80 20210621-2172674416]
	org.netbeans.api.progress/1 [1.60 20210621-2172674416]
	org.netbeans.api.progress.nb [1.60 20210621-2172674416]
	org.openide.dialogs [7.54 20210621-2172674416]
	org.openide.nodes [7.57 20210621-2172674416]
	org.openide.windows [6.89 20210621-2172674416]
	org.netbeans.modules.editor.mimelookup/1 [1.52 20210621-2172674416]
	org.openide.text [6.80 20210621-2172674416]
	org.netbeans.api.scripting [1.9 20210621-2172674416]
	org.netbeans.swing.tabcontrol [1.68 20210621-2172674416]
	org.netbeans.swing.outline [1.46 20210621-2172674416]
	org.openide.explorer [6.74 20210621-2172674416]
	org.openide.actions [6.51 20210621-2172674416]
	org.netbeans.modules.queries/1 [1.55 20210621-2172674416]
	org.netbeans.api.templates [1.20 20210621-2172674416]
	org.openide.filesystems.nb [9.22 20210621-2172674416]
	org.openide.loaders [7.81 20210621-2172674416]
	org.netbeans.api.intent [1.14 20210621-2172674416]
	org.netbeans.api.io [1.15 20210621-2172674416]
	org.openide.io [1.61 20210621-2172674416]
	org.netbeans.swing.plaf [1.54 20210621-2172674416]
	org.netbeans.modules.keyring [1.36 20210621-2172674416]
	org.netbeans.libs.asm [5.15 20210621-2172674416]
	org.netbeans.bootstrap/1 [2.90 20210621-2172674416]
	org.netbeans.core.startup.base [1.74.0.1 1 20210621-2172674416]
	org.netbeans.core.startup/1 [1.74.0.1 20210621-2172674416]
	org.netbeans.modules.sampler [1.26 20210621-2172674416]
	org.netbeans.core/2 [3.63 20210621-2172674416]
	org.netbeans.spi.quicksearch [1.39 20210621-2172674416]
	org.netbeans.modules.options.api/1 [1.57 20210621-2172674416]
	org.netbeans.libs.flatlaf/1 [1.6 20210621-2172674416]
	org.netbeans.swing.laf.flatlaf [1.5 20210621-2172674416]
	org.netbeans.modules.settings/1 [1.61 20210621-2172674416]
	org.netbeans.modules.sendopts/2 [2.48 20210621-2172674416]
	org.netbeans.modules.progress.ui [1.45 20210621-2172674416]
	org.netbeans.modules.options.keymap [1.49 20210621-2172674416]
	org.netbeans.modules.masterfs/2 [2.67.0.2 2 20210621-2172674416]
	org.netbeans.modules.masterfs.ui [2.15.0.2 20210621-2172674416]
	org.netbeans.modules.masterfs.nio2 [1.27 20210621-2172674416]
	org.netbeans.libs.jna/2 [2.7 20210621-2172674416]
	org.netbeans.modules.masterfs.linux [1.25 20210621-2172674416]
	org.netbeans.modules.keyring.fallback [1.20 20210621-2172674416]
	org.netbeans.modules.keyring.impl [1.36 20210621-2172674416]
	org.netbeans.modules.editor.mimelookup.impl/1 [1.44 20210621-2172674416]
	org.netbeans.modules.autoupdate.services [1.67 20210621-2172674416]
	org.netbeans.modules.autoupdate.ui [1.58 20210621-2172674416]
	org.netbeans.modules.autoupdate.cli [1.25 20210621-2172674416]
	org.netbeans.libs.jna.platform/2 [2.7 20210621-2172674416]
	org.netbeans.core.windows/2 [2.97 20210621-2172674416]
	org.netbeans.core.ui/1 [1.57 20210621-2172674416]
	org.netbeans.core.network [1.24 20210621-2172674416]
	org.netbeans.core.nativeaccess/1 [1.43 20210621-2172674416]
	org.netbeans.core.multitabs/1 [1.24.0.1 1 20210621-2172674416]
	org.netbeans.core.io.ui/1 [1.42 20210621-2172674416]
	org.graalvm.visualvm.lib.jfluid/2 [2.9 210708]
	org.graalvm.visualvm.lib.charts/2 [2.0 210708]
	org.graalvm.visualvm.lib.common/2 [2.4 210708]
	org.graalvm.visualvm.lib.profiler.api/2 [2.2 210708]
	org.graalvm.visualvm.lib.ui/2 [2.4 210708]
	org.graalvm.visualvm.uisupport/2 [2.1 210708]
	org.graalvm.visualvm.core/2 [2.4 210708]
	org.graalvm.visualvm.host/2 [2.1 210708]
	org.graalvm.visualvm.application/2 [2.2 210708]
	org.graalvm.visualvm.tools/2 [2.2 210708]
	org.graalvm.visualvm.coredump/2 [2.1 210708]
	org.graalvm.visualvm.threaddump/2 [2.1 210708]
	org.graalvm.visualvm.lib.profiler.utilities/2 [2.0 210708]
	org.graalvm.visualvm.lib.profiler.attach/2 [2.0 210708]
	org.graalvm.visualvm.lib.profiler/2 [2.4 210708]
	org.graalvm.visualvm.lib.profiler.snaptracer/2 [2.0 210708]
	org.graalvm.visualvm.profiling/2 [2.3 210708]
	org.graalvm.visualvm.lib.profiler.oql/2 [2.0 210708]
	org.graalvm.visualvm.lib.profiler.heapwalker/2 [2.1 210708]
	org.graalvm.visualvm.heapviewer/2 [2.3 210708]
	org.graalvm.visualvm.heapdump/2 [2.1 210708]
	org.graalvm.visualvm.sampler.truffle/2 [2.1 210708]
	org.graalvm.visualvm.sampler/2 [2.2 210708]
	org.graalvm.visualvm.sa/2 [2.0 210708]
	org.graalvm.visualvm.modules.startup/2 [2.1 210708]
	org.graalvm.visualvm.profiler/2 [2.1 210708]
	org.graalvm.visualvm.pluginimporter [1.0 210708]
	org.graalvm.visualvm.modules.appui/2 [2.1 210708]
	org.graalvm.visualvm.jvmstat/2 [2.0 210708]
	org.graalvm.visualvm.jvm/2 [2.0 210708]
	org.graalvm.visualvm.jmx/2 [2.2 210708]
	org.graalvm.visualvm.charts/2 [2.0 210708]
	org.graalvm.visualvm.jfr/2 [2.3 210708]
	org.graalvm.visualvm.jfr.jdk9/2 [2.1 210708]
	org.graalvm.visualvm.jfr.jdk11/2 [2.1 210708]
	org.graalvm.visualvm.jfr.generic/2 [2.1 210708]
	org.graalvm.visualvm.host.views/2 [2.0 210708]
	org.graalvm.visualvm.host.remote/2 [2.0 210708]
	org.graalvm.visualvm.heapviewer.truffle/2 [2.0 210708]
	org.graalvm.visualvm.heapviewer.console/2 [2.0 210708]
	org.graalvm.visualvm.application.views/2 [2.0 210708]
	org.graalvm.visualvm.graalvm/2 [2.0 210708]
	org.graalvm.visualvm.gotosource/2 [2.0 210708]
	org.graalvm.visualvm.attach/2 [2.0 210708]
Cannot initialize GTK colors - using hardcoded defaults: java.lang.reflect.InaccessibleObjectException: Unable to make protected abstract java.awt.Color javax.swing.plaf.synth.SynthStyle.getColorForState(javax.swing.plaf.synth.SynthContext,javax.swing.plaf.synth.ColorType) accessible: module java.desktop does not "opens javax.swing.plaf.synth" to unnamed module @400efd6e
INFO [org.netbeans.core.network.proxy.NetworkProxyReloader]: System network proxy resolver: no suitable found, using fallback.
INFO [org.netbeans.core.network.proxy.fallback.FallbackNetworkProxy]: Fallback system proxy resolver: no http_proxy variable found
INFO [org.netbeans.core.network.proxy.NetworkProxyReloader]: System network proxy reloading succeeded.
INFO [org.netbeans.core.network.proxy.NetworkProxyReloader]: System network proxy - mode: direct
INFO [org.netbeans.core.network.proxy.NetworkProxyReloader]: System network proxy: fell to default (correct if direct mode went before)
INFO [org.netbeans.ui.metrics.laf]: USG_LOOK_AND_FEEL
Diagnostic information
Input arguments:
	-Djdk.home=/usr/lib/jvm/default
	-Dnetbeans.default_userdir_root=/home/user/.visualvm
	-Dnetbeans.dirs=/usr/share/visualvm/visualvm:
	-Dnetbeans.home=/usr/share/visualvm/platform
	-Dawt.useSystemAAFontSettings=on
	-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
	-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/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.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
	-XX:+HeapDumpOnOutOfMemoryError
	-XX:HeapDumpPath=/home/user/.visualvm/2.1/var/log/heapdump.hprof
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=11 Total time spent=0s)
Garbage collector: G1 Old Generation (Collections=0 Total time spent=0s)
Classes: loaded=6079 total loaded=6079 unloaded 0
INFO [org.netbeans.core.ui.warmup.DiagnosticTask]: Total memory 16.715.952.128
INFO [null]: Total physical memory 16.715.952.128
INFO [org.graalvm.visualvm.attach.AttachModelImpl]: executeJCmd
com.sun.tools.attach.AttachNotSupportedException: Unable to open socket file /proc/18340/root/tmp/.java_pid18340: target process 18340 doesn't respond within 10500ms or HotSpot VM not loaded
	at jdk.attach/sun.tools.attach.VirtualMachineImpl.<init>(VirtualMachineImpl.java:104)
	at jdk.attach/sun.tools.attach.AttachProviderImpl.attachVirtualMachine(AttachProviderImpl.java:58)
	at jdk.attach/com.sun.tools.attach.VirtualMachine.attach(VirtualMachine.java:207)
	at org.graalvm.visualvm.attach.AttachModelImpl.getVirtualMachine(AttachModelImpl.java:291)
Caused: java.io.IOException: Unable to open socket file /proc/18340/root/tmp/.java_pid18340: target process 18340 doesn't respond within 10500ms or HotSpot VM not loaded
	at org.graalvm.visualvm.attach.AttachModelImpl.getVirtualMachine(AttachModelImpl.java:293)
[catch] at org.graalvm.visualvm.attach.AttachModelImpl.executeJCmd(AttachModelImpl.java:366)
	at org.graalvm.visualvm.attach.AttachModelImpl.isJfrAvailable(AttachModelImpl.java:191)
	at org.graalvm.visualvm.jvm.JVMImpl.isJfrAvailable(JVMImpl.java:513)
	at org.graalvm.visualvm.jfr.JFRSnapshotSupport.supportsJfrStart(JFRSnapshotSupport.java:169)
	at org.graalvm.visualvm.jfr.impl.JFRStartAction.isEnabled(JFRStartAction.java:95)
	at org.graalvm.visualvm.core.ui.actions.MultiDataSourceAction.updateState(MultiDataSourceAction.java:76)
	at org.graalvm.visualvm.jfr.impl.JFRStartAction.updateState(JFRStartAction.java:117)
	at org.graalvm.visualvm.core.ui.actions.DataSourceAction$1.selectionChanged(DataSourceAction.java:87)
	at org.graalvm.visualvm.core.explorer.ExplorerSupport$ExplorerTreeSelectionListener.valueChanged(ExplorerSupport.java:272)
	at java.desktop/javax.swing.JTree.fireValueChanged(JTree.java:3019)
	at java.desktop/javax.swing.JTree$TreeSelectionRedirector.valueChanged(JTree.java:3520)
	at java.desktop/javax.swing.tree.DefaultTreeSelectionModel.fireValueChanged(DefaultTreeSelectionModel.java:650)
	at java.desktop/javax.swing.tree.DefaultTreeSelectionModel.notifyPathChange(DefaultTreeSelectionModel.java:1120)
	at java.desktop/javax.swing.tree.DefaultTreeSelectionModel.setSelectionPaths(DefaultTreeSelectionModel.java:306)
	at java.desktop/javax.swing.tree.DefaultTreeSelectionModel.setSelectionPath(DefaultTreeSelectionModel.java:200)
	at java.desktop/javax.swing.JTree.setSelectionPath(JTree.java:1708)
	at java.desktop/javax.swing.plaf.basic.BasicTreeUI.selectPathForEvent(BasicTreeUI.java:2764)
	at java.desktop/javax.swing.plaf.basic.BasicTreeUI$Handler.handleSelection(BasicTreeUI.java:4099)
	at java.desktop/javax.swing.plaf.basic.BasicTreeUI$Handler.mousePressed(BasicTreeUI.java:4038)
	at java.desktop/java.awt.AWTEventMulticaster.mousePressed(AWTEventMulticaster.java:287)
	at java.desktop/java.awt.Component.processMouseEvent(Component.java:6623)
	at java.desktop/javax.swing.JComponent.processMouseEvent(JComponent.java:3389)
	at org.graalvm.visualvm.core.explorer.ExplorerComponent$1.processMouseEvent(ExplorerComponent.java:110)
	at java.desktop/java.awt.Component.processEvent(Component.java:6391)
	at java.desktop/java.awt.Container.processEvent(Container.java:2266)
	at java.desktop/java.awt.Component.dispatchEventImpl(Component.java:5001)
	at java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2324)
	at java.desktop/java.awt.Component.dispatchEvent(Component.java:4833)
	at java.desktop/java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4948)
	at java.desktop/java.awt.LightweightDispatcher.processMouseEvent(Container.java:4572)
	at java.desktop/java.awt.LightweightDispatcher.dispatchEvent(Container.java:4516)
	at java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2310)
	at java.desktop/java.awt.Window.dispatchEventImpl(Window.java:2780)
	at java.desktop/java.awt.Component.dispatchEvent(Component.java:4833)
	at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:773)
	at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:722)
	at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:716)
	at java.base/java.security.AccessController.doPrivileged(AccessController.java:399)
	at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:86)
	at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:97)
	at java.desktop/java.awt.EventQueue$5.run(EventQueue.java:746)
	at java.desktop/java.awt.EventQueue$5.run(EventQueue.java:744)
	at java.base/java.security.AccessController.doPrivileged(AccessController.java:399)
	at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:86)
	at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:743)
	at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:136)
	at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:203)
	at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124)
	at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113)
	at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109)
	at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
	at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:90)
INFO [org.graalvm.visualvm.attach.AttachModelImpl]: getSystemProperties
com.sun.tools.attach.AttachNotSupportedException: Unable to open socket file /proc/18340/root/tmp/.java_pid18340: target process 18340 doesn't respond within 10500ms or HotSpot VM not loaded
	at jdk.attach/sun.tools.attach.VirtualMachineImpl.<init>(VirtualMachineImpl.java:104)
	at jdk.attach/sun.tools.attach.AttachProviderImpl.attachVirtualMachine(AttachProviderImpl.java:58)
	at jdk.attach/com.sun.tools.attach.VirtualMachine.attach(VirtualMachine.java:207)
	at org.graalvm.visualvm.attach.AttachModelImpl.getVirtualMachine(AttachModelImpl.java:291)
Caused: java.io.IOException: Unable to open socket file /proc/18340/root/tmp/.java_pid18340: target process 18340 doesn't respond within 10500ms or HotSpot VM not loaded
	at org.graalvm.visualvm.attach.AttachModelImpl.getVirtualMachine(AttachModelImpl.java:293)
[catch] at org.graalvm.visualvm.attach.AttachModelImpl.getSystemProperties(AttachModelImpl.java:95)
	at org.graalvm.visualvm.jvm.JVMImpl.getSystemProperties(JVMImpl.java:342)
	at org.graalvm.visualvm.profiler.ProfilerSupport.getJVMArchitecture(ProfilerSupport.java:382)
	at org.graalvm.visualvm.profiler.ProfilerSupport.supportsProfiling(ProfilerSupport.java:303)
	at org.graalvm.visualvm.profiler.ProfileApplicationAction.isEnabled(ProfileApplicationAction.java:70)
	at org.graalvm.visualvm.profiler.ProfileApplicationAction.isEnabled(ProfileApplicationAction.java:42)
	at org.graalvm.visualvm.core.ui.actions.SingleDataSourceAction.updateState(SingleDataSourceAction.java:77)
	at org.graalvm.visualvm.profiler.ProfileApplicationAction.updateState(ProfileApplicationAction.java:78)
	at org.graalvm.visualvm.core.ui.actions.DataSourceAction$1.selectionChanged(DataSourceAction.java:87)
	at org.graalvm.visualvm.core.explorer.ExplorerSupport$ExplorerTreeSelectionListener.valueChanged(ExplorerSupport.java:272)
	at java.desktop/javax.swing.JTree.fireValueChanged(JTree.java:3019)
	at java.desktop/javax.swing.JTree$TreeSelectionRedirector.valueChanged(JTree.java:3520)
	at java.desktop/javax.swing.tree.DefaultTreeSelectionModel.fireValueChanged(DefaultTreeSelectionModel.java:650)
	at java.desktop/javax.swing.tree.DefaultTreeSelectionModel.notifyPathChange(DefaultTreeSelectionModel.java:1120)
	at java.desktop/javax.swing.tree.DefaultTreeSelectionModel.setSelectionPaths(DefaultTreeSelectionModel.java:306)
	at java.desktop/javax.swing.tree.DefaultTreeSelectionModel.setSelectionPath(DefaultTreeSelectionModel.java:200)
	at java.desktop/javax.swing.JTree.setSelectionPath(JTree.java:1708)
	at java.desktop/javax.swing.plaf.basic.BasicTreeUI.selectPathForEvent(BasicTreeUI.java:2764)
	at java.desktop/javax.swing.plaf.basic.BasicTreeUI$Handler.handleSelection(BasicTreeUI.java:4099)
	at java.desktop/javax.swing.plaf.basic.BasicTreeUI$Handler.mousePressed(BasicTreeUI.java:4038)
	at java.desktop/java.awt.AWTEventMulticaster.mousePressed(AWTEventMulticaster.java:287)
	at java.desktop/java.awt.Component.processMouseEvent(Component.java:6623)
	at java.desktop/javax.swing.JComponent.processMouseEvent(JComponent.java:3389)
	at org.graalvm.visualvm.core.explorer.ExplorerComponent$1.processMouseEvent(ExplorerComponent.java:110)
	at java.desktop/java.awt.Component.processEvent(Component.java:6391)
	at java.desktop/java.awt.Container.processEvent(Container.java:2266)
	at java.desktop/java.awt.Component.dispatchEventImpl(Component.java:5001)
	at java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2324)
	at java.desktop/java.awt.Component.dispatchEvent(Component.java:4833)
	at java.desktop/java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4948)
	at java.desktop/java.awt.LightweightDispatcher.processMouseEvent(Container.java:4572)
	at java.desktop/java.awt.LightweightDispatcher.dispatchEvent(Container.java:4516)
	at java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2310)
	at java.desktop/java.awt.Window.dispatchEventImpl(Window.java:2780)
	at java.desktop/java.awt.Component.dispatchEvent(Component.java:4833)
	at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:773)
	at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:722)
	at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:716)
	at java.base/java.security.AccessController.doPrivileged(AccessController.java:399)
	at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:86)
	at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:97)
	at java.desktop/java.awt.EventQueue$5.run(EventQueue.java:746)
	at java.desktop/java.awt.EventQueue$5.run(EventQueue.java:744)
	at java.base/java.security.AccessController.doPrivileged(AccessController.java:399)
	at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:86)
	at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:743)
	at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:136)
	at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:203)
	at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124)
	at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113)
	at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109)
	at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
	at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:90)
INFO [org.graalvm.visualvm.sa.SaModelProvider]: Error getting SA agent
sun.jvm.hotspot.debugger.DebuggerException: Can't attach to the process: ptrace(PTRACE_ATTACH, ..) failed for 18340: Die Operation ist nicht erlaubt
	at sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.attach0(Native Method)
	at sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$1AttachTask.doit(LinuxDebuggerLocal.java:336)
	at sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$LinuxDebuggerLocalWorkerThread.run(LinuxDebuggerLocal.java:162)
Caused: sun.jvm.hotspot.debugger.DebuggerException: Can't attach to the process: ptrace(PTRACE_ATTACH, ..) failed for 18340: Die Operation ist nicht erlaubt
	at sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$LinuxDebuggerLocalWorkerThread.execute(LinuxDebuggerLocal.java:187)
	at sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.attach(LinuxDebuggerLocal.java:345)
	at sun.jvm.hotspot.HotSpotAgent.attachDebugger(HotSpotAgent.java:648)
	at sun.jvm.hotspot.HotSpotAgent.setupDebuggerLinux(HotSpotAgent.java:586)
	at sun.jvm.hotspot.HotSpotAgent.setupDebugger(HotSpotAgent.java:367)
	at sun.jvm.hotspot.HotSpotAgent.go(HotSpotAgent.java:336)
	at sun.jvm.hotspot.HotSpotAgent.attach(HotSpotAgent.java:141)
Caused: java.lang.reflect.InvocationTargetException
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:568)
	at org.graalvm.visualvm.sa.SAObject.invoke(SAObject.java:107)
	at org.graalvm.visualvm.sa.Agent.attach(Agent.java:64)
	at org.graalvm.visualvm.sa.SaModelImpl.attach(SaModelImpl.java:118)
	at org.graalvm.visualvm.sa.SaModelImpl.readData(SaModelImpl.java:126)
	at org.graalvm.visualvm.sa.SaModelImpl.<init>(SaModelImpl.java:52)
[catch] at org.graalvm.visualvm.sa.SaModelProvider.createModelFor(SaModelProvider.java:85)
	at org.graalvm.visualvm.sa.SaModelProvider.createModelFor(SaModelProvider.java:46)
	at org.graalvm.visualvm.core.model.ModelFactory.getModel(ModelFactory.java:105)
	at org.graalvm.visualvm.tools.sa.SaModelFactory.getSAAgentFor(SaModelFactory.java:65)
	at org.graalvm.visualvm.jvm.JVMImpl.getSAAgent(JVMImpl.java:597)
	at org.graalvm.visualvm.jvm.JVMImpl.getSystemProperties(JVMImpl.java:353)
	at org.graalvm.visualvm.profiler.ProfilerSupport.getJVMArchitecture(ProfilerSupport.java:382)
	at org.graalvm.visualvm.profiler.ProfilerSupport.supportsProfiling(ProfilerSupport.java:303)
	at org.graalvm.visualvm.profiler.ProfileApplicationAction.isEnabled(ProfileApplicationAction.java:70)
	at org.graalvm.visualvm.profiler.ProfileApplicationAction.isEnabled(ProfileApplicationAction.java:42)
	at org.graalvm.visualvm.core.ui.actions.SingleDataSourceAction.updateState(SingleDataSourceAction.java:77)
	at org.graalvm.visualvm.profiler.ProfileApplicationAction.updateState(ProfileApplicationAction.java:78)
	at org.graalvm.visualvm.core.ui.actions.DataSourceAction$1.selectionChanged(DataSourceAction.java:87)
	at org.graalvm.visualvm.core.explorer.ExplorerSupport$ExplorerTreeSelectionListener.valueChanged(ExplorerSupport.java:272)
	at java.desktop/javax.swing.JTree.fireValueChanged(JTree.java:3019)
	at java.desktop/javax.swing.JTree$TreeSelectionRedirector.valueChanged(JTree.java:3520)
	at java.desktop/javax.swing.tree.DefaultTreeSelectionModel.fireValueChanged(DefaultTreeSelectionModel.java:650)
	at java.desktop/javax.swing.tree.DefaultTreeSelectionModel.notifyPathChange(DefaultTreeSelectionModel.java:1120)
	at java.desktop/javax.swing.tree.DefaultTreeSelectionModel.setSelectionPaths(DefaultTreeSelectionModel.java:306)
	at java.desktop/javax.swing.tree.DefaultTreeSelectionModel.setSelectionPath(DefaultTreeSelectionModel.java:200)
	at java.desktop/javax.swing.JTree.setSelectionPath(JTree.java:1708)
	at java.desktop/javax.swing.plaf.basic.BasicTreeUI.selectPathForEvent(BasicTreeUI.java:2764)
	at java.desktop/javax.swing.plaf.basic.BasicTreeUI$Handler.handleSelection(BasicTreeUI.java:4099)
	at java.desktop/javax.swing.plaf.basic.BasicTreeUI$Handler.mousePressed(BasicTreeUI.java:4038)
	at java.desktop/java.awt.AWTEventMulticaster.mousePressed(AWTEventMulticaster.java:287)
	at java.desktop/java.awt.Component.processMouseEvent(Component.java:6623)
	at java.desktop/javax.swing.JComponent.processMouseEvent(JComponent.java:3389)
	at org.graalvm.visualvm.core.explorer.ExplorerComponent$1.processMouseEvent(ExplorerComponent.java:110)
	at java.desktop/java.awt.Component.processEvent(Component.java:6391)
	at java.desktop/java.awt.Container.processEvent(Container.java:2266)
	at java.desktop/java.awt.Component.dispatchEventImpl(Component.java:5001)
	at java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2324)
	at java.desktop/java.awt.Component.dispatchEvent(Component.java:4833)
	at java.desktop/java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4948)
	at java.desktop/java.awt.LightweightDispatcher.processMouseEvent(Container.java:4572)
	at java.desktop/java.awt.LightweightDispatcher.dispatchEvent(Container.java:4516)
	at java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2310)
	at java.desktop/java.awt.Window.dispatchEventImpl(Window.java:2780)
	at java.desktop/java.awt.Component.dispatchEvent(Component.java:4833)
	at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:773)
	at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:722)
	at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:716)
	at java.base/java.security.AccessController.doPrivileged(AccessController.java:399)
	at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:86)
	at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:97)
	at java.desktop/java.awt.EventQueue$5.run(EventQueue.java:746)
	at java.desktop/java.awt.EventQueue$5.run(EventQueue.java:744)
	at java.base/java.security.AccessController.doPrivileged(AccessController.java:399)
	at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:86)
	at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:743)
	at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:136)
	at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:203)
	at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124)
	at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113)
	at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109)
	at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
	at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:90)
INFO [org.graalvm.visualvm.attach.AttachModelImpl]: printFlag
com.sun.tools.attach.AttachNotSupportedException: Unable to open socket file /proc/18340/root/tmp/.java_pid18340: target process 18340 doesn't respond within 10500ms or HotSpot VM not loaded
	at jdk.attach/sun.tools.attach.VirtualMachineImpl.<init>(VirtualMachineImpl.java:104)
	at jdk.attach/sun.tools.attach.AttachProviderImpl.attachVirtualMachine(AttachProviderImpl.java:58)
	at jdk.attach/com.sun.tools.attach.VirtualMachine.attach(VirtualMachine.java:207)
	at org.graalvm.visualvm.attach.AttachModelImpl.getVirtualMachine(AttachModelImpl.java:291)
Caused: java.io.IOException: Unable to open socket file /proc/18340/root/tmp/.java_pid18340: target process 18340 doesn't respond within 10500ms or HotSpot VM not loaded
	at org.graalvm.visualvm.attach.AttachModelImpl.getVirtualMachine(AttachModelImpl.java:293)
[catch] at org.graalvm.visualvm.attach.AttachModelImpl.printFlag(AttachModelImpl.java:133)
	at org.graalvm.visualvm.jvm.JVMImpl.isDumpOnOOMEnabled(JVMImpl.java:258)
	at org.graalvm.visualvm.heapdump.impl.HeapDumpOnOOMEAction.updateState(HeapDumpOnOOMEAction.java:87)
	at org.graalvm.visualvm.heapdump.impl.HeapDumpOnOOMEAction.isEnabled(HeapDumpOnOOMEAction.java:81)
	at org.graalvm.visualvm.heapdump.impl.HeapDumpOnOOMEAction.isEnabled(HeapDumpOnOOMEAction.java:50)
	at org.graalvm.visualvm.core.ui.actions.SingleDataSourceAction.updateState(SingleDataSourceAction.java:77)
	at org.graalvm.visualvm.heapdump.impl.HeapDumpOnOOMEAction.updateState(HeapDumpOnOOMEAction.java:95)
	at org.graalvm.visualvm.core.ui.actions.DataSourceAction.initialize(DataSourceAction.java:92)
	at org.graalvm.visualvm.core.ui.actions.DataSourceAction.doInitialize(DataSourceAction.java:124)
	at org.graalvm.visualvm.core.ui.actions.DataSourceAction.isEnabled(DataSourceAction.java:101)
	at org.graalvm.visualvm.core.explorer.ExplorerContextMenuFactory.getActions(ExplorerContextMenuFactory.java:172)
	at org.graalvm.visualvm.core.explorer.ExplorerContextMenuFactory.getSelectionActions(ExplorerContextMenuFactory.java:128)
	at org.graalvm.visualvm.core.explorer.ExplorerContextMenuFactory.getActions(ExplorerContextMenuFactory.java:122)
	at org.graalvm.visualvm.core.explorer.ExplorerContextMenuFactory.createPopupMenu(ExplorerContextMenuFactory.java:74)
	at org.graalvm.visualvm.core.explorer.ExplorerComponent.displayContextMenu(ExplorerComponent.java:204)
	at org.graalvm.visualvm.core.explorer.ExplorerComponent.access$800(ExplorerComponent.java:68)
	at org.graalvm.visualvm.core.explorer.ExplorerComponent$ExplorerTreeMouseAdapter.mousePressed(ExplorerComponent.java:247)
	at java.desktop/java.awt.AWTEventMulticaster.mousePressed(AWTEventMulticaster.java:288)
	at java.desktop/java.awt.Component.processMouseEvent(Component.java:6623)
	at java.desktop/javax.swing.JComponent.processMouseEvent(JComponent.java:3389)
	at org.graalvm.visualvm.core.explorer.ExplorerComponent$1.processMouseEvent(ExplorerComponent.java:110)
	at java.desktop/java.awt.Component.processEvent(Component.java:6391)
	at java.desktop/java.awt.Container.processEvent(Container.java:2266)
	at java.desktop/java.awt.Component.dispatchEventImpl(Component.java:5001)
	at java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2324)
	at java.desktop/java.awt.Component.dispatchEvent(Component.java:4833)
	at java.desktop/java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4948)
	at java.desktop/java.awt.LightweightDispatcher.processMouseEvent(Container.java:4572)
	at java.desktop/java.awt.LightweightDispatcher.dispatchEvent(Container.java:4516)
	at java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2310)
	at java.desktop/java.awt.Window.dispatchEventImpl(Window.java:2780)
	at java.desktop/java.awt.Component.dispatchEvent(Component.java:4833)
	at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:773)
	at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:722)
	at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:716)
	at java.base/java.security.AccessController.doPrivileged(AccessController.java:399)
	at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:86)
	at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:97)
	at java.desktop/java.awt.EventQueue$5.run(EventQueue.java:746)
	at java.desktop/java.awt.EventQueue$5.run(EventQueue.java:744)
	at java.base/java.security.AccessController.doPrivileged(AccessController.java:399)
	at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:86)
	at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:743)
	at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:136)
	at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:203)
	at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124)
	at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113)
	at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109)
	at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
	at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:90)
INFO [org.graalvm.visualvm.attach.AttachModelImpl]: getSystemProperties
com.sun.tools.attach.AttachNotSupportedException: Unable to open socket file /proc/18340/root/tmp/.java_pid18340: target process 18340 doesn't respond within 10500ms or HotSpot VM not loaded
	at jdk.attach/sun.tools.attach.VirtualMachineImpl.<init>(VirtualMachineImpl.java:104)
	at jdk.attach/sun.tools.attach.AttachProviderImpl.attachVirtualMachine(AttachProviderImpl.java:58)
	at jdk.attach/com.sun.tools.attach.VirtualMachine.attach(VirtualMachine.java:207)
	at org.graalvm.visualvm.attach.AttachModelImpl.getVirtualMachine(AttachModelImpl.java:291)
Caused: java.io.IOException: Unable to open socket file /proc/18340/root/tmp/.java_pid18340: target process 18340 doesn't respond within 10500ms or HotSpot VM not loaded
	at org.graalvm.visualvm.attach.AttachModelImpl.getVirtualMachine(AttachModelImpl.java:293)
[catch] at org.graalvm.visualvm.attach.AttachModelImpl.getSystemProperties(AttachModelImpl.java:95)
	at org.graalvm.visualvm.jvm.JVMImpl.getSystemProperties(JVMImpl.java:342)
	at org.graalvm.visualvm.sampler.truffle.SamplerSupport.isRunningOnGraalVM(SamplerSupport.java:85)
	at org.graalvm.visualvm.sampler.truffle.SamplerSupport.supportsProfiling(SamplerSupport.java:65)
	at org.graalvm.visualvm.sampler.truffle.ApplicationSamplerViewProvider.supportsViewFor(ApplicationSamplerViewProvider.java:40)
	at org.graalvm.visualvm.sampler.truffle.ApplicationSamplerViewProvider.supportsViewFor(ApplicationSamplerViewProvider.java:37)
	at org.graalvm.visualvm.core.ui.DataSourceViewsManager.getViews(DataSourceViewsManager.java:136)
	at org.graalvm.visualvm.core.ui.DataSourceWindowManager.openWindowAndAddView(DataSourceWindowManager.java:262)
	at org.graalvm.visualvm.core.ui.DataSourceWindowManager.access$000(DataSourceWindowManager.java:52)
	at org.graalvm.visualvm.core.ui.DataSourceWindowManager$2.run(DataSourceWindowManager.java:121)
	at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1418)
	at org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:45)
	at org.openide.util.lookup.Lookups.executeWith(Lookups.java:278)
	at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2033)
SEVERE [org.openide.util.RequestProcessor]: Error in RequestProcessor org.graalvm.visualvm.core.ui.DataSourceWindowManager$2
java.lang.NullPointerException: Cannot invoke "java.util.Properties.getProperty(String, String)" because "props" is null
	at org.graalvm.visualvm.sampler.truffle.SamplerSupport.isRunningOnGraalVM(SamplerSupport.java:86)
	at org.graalvm.visualvm.sampler.truffle.SamplerSupport.supportsProfiling(SamplerSupport.java:65)
	at org.graalvm.visualvm.sampler.truffle.ApplicationSamplerViewProvider.supportsViewFor(ApplicationSamplerViewProvider.java:40)
	at org.graalvm.visualvm.sampler.truffle.ApplicationSamplerViewProvider.supportsViewFor(ApplicationSamplerViewProvider.java:37)
	at org.graalvm.visualvm.core.ui.DataSourceViewsManager.getViews(DataSourceViewsManager.java:136)
	at org.graalvm.visualvm.core.ui.DataSourceWindowManager.openWindowAndAddView(DataSourceWindowManager.java:262)
	at org.graalvm.visualvm.core.ui.DataSourceWindowManager.access$000(DataSourceWindowManager.java:52)
	at org.graalvm.visualvm.core.ui.DataSourceWindowManager$2.run(DataSourceWindowManager.java:121)
	at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1418)
	at org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:45)
	at org.openide.util.lookup.Lookups.executeWith(Lookups.java:278)
[catch] at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2033)

Desktop:

  • OS: Linux (Arch Linux, Kernel 5.15.7)
  • JDK version 17.0.1+12
  • Version 2.1.1

Additional context

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start with org.graalvm.visualvm.sampler.truffle.SamplerSupport.java at isRunningOnGraalVM (line 86), then follow supportsProfiling and ApplicationSamplerViewProvider.supportsViewFor in the stack trace. Reproduce by opening a locally running Java application in VisualVM and inspect the reported null-properties path. Done means selecting the application no longer freezes or reports the NullPointerException, and its view opens.

Written by the indexing model from the issue text.

Assessment

Tech stack
java
Domain
devtools
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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