CoreCLR_Shutdown and MetaDataGetDispenser Hang #69462

Closed
Closed
CoreCLR_Shutdown and MetaDataGetDispenser Hang#69462
Labels
area-TieredCompilation-coreclrneeds-further-triageIssue has been initially triaged, but needs deeper consideration or reconsideration
Milestone
7.0.0

Description

@TonyValenti
TonyValenti
opened on May 17, 2022

Description

I have a highly concurrent application that ETL's data between systems.

It usually works just fine, however, sometimes it will hang (even when debugging). When it does, the following happens:

  1. App becomes unresponsive and stops processing data.
  2. App maxes out 1 CPU core (but isn't doing anything related to its job)
  3. Visual Studio starts having issues. It seems as if the debugger link between VS and my app gets frozen. I cannot pause/stop my app through VS, and the Diagnostics Tools window stops updating.
  4. The only way to recover is to end-task the application.

When this happens, I took a look at Process Explorer to look at threads and noticed that CoreClr_Shutdown is the function that is maxing out one CPU. I also noticed that there are a lot of MetaDataGetDispenser threads.

I am not sure what is happening but I suspect that there is some kind of race condition I am bumping into somewhere in the framework.

When .NET 6.0 first came out, I opened a ticket with MS Support using my MSDN subscription. I spent a lot of time and got nowhere. Since upgrading to .NET 6.0.5, this seems to happen a whole lot more.

Is there anyone who can help?

Below are screen shots of what I see through Process Explorer:
image

image

Reproduction Steps

Run my app. Sometimes it happens. Sometimes it does not.

Expected behavior

The app always runs responsively. If there is a bug in my app, I should still be able to pause/stop through VS.

Actual behavior

My app freezes and VS starts misbehaving. Trying to pause/stop through VS does nothing and I must end-task my app.

Regression?

It was an issue and now seems to occur more often since upgrading to .NET 6.0.5.

Known Workarounds

Kill my app and try again.

Configuration

.NET 6.0.5
Windows 11
x64
WPF

Other information

No response

Metadata

Metadata

Assignees

No one assigned

    Labels

    area-TieredCompilation-coreclrneeds-further-triageIssue has been initially triaged, but needs deeper consideration or reconsideration

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      None yet

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      , 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all 
       blocks\n(function() {\n function addCopyButtons() {\n document.querySelectorAll('pre code').forEach(function(codeBlock) {\n if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;\n codeBlock.parentElement.setAttribute('data-copy-added', 'true');\n \n var btn = document.createElement('button');\n btn.textContent = 'Copy';\n btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';\n btn.onmouseover = function() { this.style.opacity = '1'; };\n btn.onmouseout = function() { this.style.opacity = '0.7'; };\n btn.onclick = function() {\n navigator.clipboard.writeText(codeBlock.textContent).then(function() {\n btn.textContent = 'Copied!';\n setTimeout(function() { btn.textContent = 'Copy'; }, 1500);\n });\n };\n codeBlock.parentElement.style.position = 'relative';\n codeBlock.parentElement.appendChild(btn);\n });\n }\n \n addCopyButtons();\n \n // Re-run on dynamic content\n var observer = new MutationObserver(addCopyButtons);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Add Copy Buttons to Code Blocks");
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '

      Skip to content
      CoreCLR_Shutdown and MetaDataGetDispenser Hang #69462
      Closed
      Closed
      CoreCLR_Shutdown and MetaDataGetDispenser Hang#69462
      Labels
      area-TieredCompilation-coreclrneeds-further-triageIssue has been initially triaged, but needs deeper consideration or reconsideration
      Milestone
      7.0.0
      Description
      @TonyValenti
      TonyValenti
      opened on May 17, 2022
      Description
      I have a highly concurrent application that ETL's data between systems.
      It usually works just fine, however, sometimes it will hang (even when debugging). When it does, the following happens:
      1. App becomes unresponsive and stops processing data.
      2. App maxes out 1 CPU core (but isn't doing anything related to its job)
      3. Visual Studio starts having issues. It seems as if the debugger link between VS and my app gets frozen. I cannot pause/stop my app through VS, and the Diagnostics Tools window stops updating.
      4. The only way to recover is to end-task the application.
      When this happens, I took a look at Process Explorer to look at threads and noticed that CoreClr_Shutdown is the function that is maxing out one CPU. I also noticed that there are a lot of MetaDataGetDispenser threads.
      I am not sure what is happening but I suspect that there is some kind of race condition I am bumping into somewhere in the framework.
      When .NET 6.0 first came out, I opened a ticket with MS Support using my MSDN subscription. I spent a lot of time and got nowhere. Since upgrading to .NET 6.0.5, this seems to happen a whole lot more.
      Is there anyone who can help?
      Below are screen shots of what I see through Process Explorer:
      image
      image
      Reproduction Steps
      Run my app. Sometimes it happens. Sometimes it does not.
      Expected behavior
      The app always runs responsively. If there is a bug in my app, I should still be able to pause/stop through VS.
      Actual behavior
      My app freezes and VS starts misbehaving. Trying to pause/stop through VS does nothing and I must end-task my app.
      Regression?
      It was an issue and now seems to occur more often since upgrading to .NET 6.0.5.
      Known Workarounds
      Kill my app and try again.
      Configuration
      .NET 6.0.5
      
Windows 11
      
x64
      
WPF
      Other information
      No response
      Metadata
      Metadata
      Assignees
      No one assigned
        Labels
        area-TieredCompilation-coreclrneeds-further-triageIssue has been initially triaged, but needs deeper consideration or reconsideration
        Type
        No type
        Projects
        No projects
          Milestone
          Relationships
          None yet
          Development
          No branches or pull requests
          Issue actions
          
, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix");
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

          Skip to content
          CoreCLR_Shutdown and MetaDataGetDispenser Hang #69462
          Closed
          Closed
          CoreCLR_Shutdown and MetaDataGetDispenser Hang#69462
          Labels
          area-TieredCompilation-coreclrneeds-further-triageIssue has been initially triaged, but needs deeper consideration or reconsideration
          Milestone
          7.0.0
          Description
          @TonyValenti
          TonyValenti
          opened on May 17, 2022
          Description
          I have a highly concurrent application that ETL's data between systems.
          It usually works just fine, however, sometimes it will hang (even when debugging). When it does, the following happens:
          1. App becomes unresponsive and stops processing data.
          2. App maxes out 1 CPU core (but isn't doing anything related to its job)
          3. Visual Studio starts having issues. It seems as if the debugger link between VS and my app gets frozen. I cannot pause/stop my app through VS, and the Diagnostics Tools window stops updating.
          4. The only way to recover is to end-task the application.
          When this happens, I took a look at Process Explorer to look at threads and noticed that CoreClr_Shutdown is the function that is maxing out one CPU. I also noticed that there are a lot of MetaDataGetDispenser threads.
          I am not sure what is happening but I suspect that there is some kind of race condition I am bumping into somewhere in the framework.
          When .NET 6.0 first came out, I opened a ticket with MS Support using my MSDN subscription. I spent a lot of time and got nowhere. Since upgrading to .NET 6.0.5, this seems to happen a whole lot more.
          Is there anyone who can help?
          Below are screen shots of what I see through Process Explorer:
          image
          image
          Reproduction Steps
          Run my app. Sometimes it happens. Sometimes it does not.
          Expected behavior
          The app always runs responsively. If there is a bug in my app, I should still be able to pause/stop through VS.
          Actual behavior
          My app freezes and VS starts misbehaving. Trying to pause/stop through VS does nothing and I must end-task my app.
          Regression?
          It was an issue and now seems to occur more often since upgrading to .NET 6.0.5.
          Known Workarounds
          Kill my app and try again.
          Configuration
          .NET 6.0.5
          
Windows 11
          
x64
          
WPF
          Other information
          No response
          Metadata
          Metadata
          Assignees
          No one assigned
            Labels
            area-TieredCompilation-coreclrneeds-further-triageIssue has been initially triaged, but needs deeper consideration or reconsideration
            Type
            No type
            Projects
            No projects
              Milestone
              Relationships
              None yet
              Development
              No branches or pull requests
              Issue actions
              
, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Highlight search terms from Google/DuckDuckGo/Bing referrer\n(function() {\n var ref = document.referrer;\n var terms = [];\n \n if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {\n var url = new URL(ref);\n var q = url.searchParams.get('q') || url.searchParams.get('p');\n if (q) {\n terms = q.split(/\\s+/).filter(function(t) { return t.length > 2; });\n }\n }\n \n if (terms.length === 0) return;\n \n var style = document.createElement('style');\n style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';\n document.head.appendChild(style);\n \n function highlight(node) {\n if (node.nodeType === 3) { // text node\n var text = node.textContent;\n var found = false;\n terms.forEach(function(term) {\n var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\') + ')', 'gi');\n if (regex.test(text)) {\n found = true;\n var frag = document.createDocumentFragment();\n var parts = text.split(regex);\n parts.forEach(function(part, i) {\n if (i % 2 === 0) {\n frag.appendChild(document.createTextNode(part));\n } else {\n var span = document.createElement('span');\n span.className = 'userscript-highlight';\n span.textContent = part;\n frag.appendChild(span);\n }\n });\n node.parentNode.replaceChild(frag, node);\n }\n });\n } else if (node.nodeType === 1 && node.childNodes) { // element\n var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];\n if (!skipTags.includes(node.tagName)) {\n Array.from(node.childNodes).forEach(highlight);\n }\n }\n }\n \n highlight(document.body);\n \n // Re-highlight on dynamic content\n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1 || node.nodeType === 3) highlight(node);\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Highlight Search Terms");
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

              Skip to content
              CoreCLR_Shutdown and MetaDataGetDispenser Hang #69462
              Closed
              Closed
              CoreCLR_Shutdown and MetaDataGetDispenser Hang#69462
              Labels
              area-TieredCompilation-coreclrneeds-further-triageIssue has been initially triaged, but needs deeper consideration or reconsideration
              Milestone
              7.0.0
              Description
              @TonyValenti
              TonyValenti
              opened on May 17, 2022
              Description
              I have a highly concurrent application that ETL's data between systems.
              It usually works just fine, however, sometimes it will hang (even when debugging). When it does, the following happens:
              1. App becomes unresponsive and stops processing data.
              2. App maxes out 1 CPU core (but isn't doing anything related to its job)
              3. Visual Studio starts having issues. It seems as if the debugger link between VS and my app gets frozen. I cannot pause/stop my app through VS, and the Diagnostics Tools window stops updating.
              4. The only way to recover is to end-task the application.
              When this happens, I took a look at Process Explorer to look at threads and noticed that CoreClr_Shutdown is the function that is maxing out one CPU. I also noticed that there are a lot of MetaDataGetDispenser threads.
              I am not sure what is happening but I suspect that there is some kind of race condition I am bumping into somewhere in the framework.
              When .NET 6.0 first came out, I opened a ticket with MS Support using my MSDN subscription. I spent a lot of time and got nowhere. Since upgrading to .NET 6.0.5, this seems to happen a whole lot more.
              Is there anyone who can help?
              Below are screen shots of what I see through Process Explorer:
              image
              image
              Reproduction Steps
              Run my app. Sometimes it happens. Sometimes it does not.
              Expected behavior
              The app always runs responsively. If there is a bug in my app, I should still be able to pause/stop through VS.
              Actual behavior
              My app freezes and VS starts misbehaving. Trying to pause/stop through VS does nothing and I must end-task my app.
              Regression?
              It was an issue and now seems to occur more often since upgrading to .NET 6.0.5.
              Known Workarounds
              Kill my app and try again.
              Configuration
              .NET 6.0.5
              
Windows 11
              
x64
              
WPF
              Other information
              No response
              Metadata
              Metadata
              Assignees
              No one assigned
                Labels
                area-TieredCompilation-coreclrneeds-further-triageIssue has been initially triaged, but needs deeper consideration or reconsideration
                Type
                No type
                Projects
                No projects
                  Milestone
                  Relationships
                  None yet
                  Development
                  No branches or pull requests
                  Issue actions
                  
, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links");
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

                  Skip to content
                  CoreCLR_Shutdown and MetaDataGetDispenser Hang #69462
                  Closed
                  Closed
                  CoreCLR_Shutdown and MetaDataGetDispenser Hang#69462
                  Labels
                  area-TieredCompilation-coreclrneeds-further-triageIssue has been initially triaged, but needs deeper consideration or reconsideration
                  Milestone
                  7.0.0
                  Description
                  @TonyValenti
                  TonyValenti
                  opened on May 17, 2022
                  Description
                  I have a highly concurrent application that ETL's data between systems.
                  It usually works just fine, however, sometimes it will hang (even when debugging). When it does, the following happens:
                  1. App becomes unresponsive and stops processing data.
                  2. App maxes out 1 CPU core (but isn't doing anything related to its job)
                  3. Visual Studio starts having issues. It seems as if the debugger link between VS and my app gets frozen. I cannot pause/stop my app through VS, and the Diagnostics Tools window stops updating.
                  4. The only way to recover is to end-task the application.
                  When this happens, I took a look at Process Explorer to look at threads and noticed that CoreClr_Shutdown is the function that is maxing out one CPU. I also noticed that there are a lot of MetaDataGetDispenser threads.
                  I am not sure what is happening but I suspect that there is some kind of race condition I am bumping into somewhere in the framework.
                  When .NET 6.0 first came out, I opened a ticket with MS Support using my MSDN subscription. I spent a lot of time and got nowhere. Since upgrading to .NET 6.0.5, this seems to happen a whole lot more.
                  Is there anyone who can help?
                  Below are screen shots of what I see through Process Explorer:
                  image
                  image
                  Reproduction Steps
                  Run my app. Sometimes it happens. Sometimes it does not.
                  Expected behavior
                  The app always runs responsively. If there is a bug in my app, I should still be able to pause/stop through VS.
                  Actual behavior
                  My app freezes and VS starts misbehaving. Trying to pause/stop through VS does nothing and I must end-task my app.
                  Regression?
                  It was an issue and now seems to occur more often since upgrading to .NET 6.0.5.
                  Known Workarounds
                  Kill my app and try again.
                  Configuration
                  .NET 6.0.5
                  
Windows 11
                  
x64
                  
WPF
                  Other information
                  No response
                  Metadata
                  Metadata
                  Assignees
                  No one assigned
                    Labels
                    area-TieredCompilation-coreclrneeds-further-triageIssue has been initially triaged, but needs deeper consideration or reconsideration
                    Type
                    No type
                    Projects
                    No projects
                      Milestone
                      Relationships
                      None yet
                      Development
                      No branches or pull requests
                      Issue actions
                      
, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default");
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

                      Skip to content
                      CoreCLR_Shutdown and MetaDataGetDispenser Hang #69462
                      Closed
                      Closed
                      CoreCLR_Shutdown and MetaDataGetDispenser Hang#69462
                      Labels
                      area-TieredCompilation-coreclrneeds-further-triageIssue has been initially triaged, but needs deeper consideration or reconsideration
                      Milestone
                      7.0.0
                      Description
                      @TonyValenti
                      TonyValenti
                      opened on May 17, 2022
                      Description
                      I have a highly concurrent application that ETL's data between systems.
                      It usually works just fine, however, sometimes it will hang (even when debugging). When it does, the following happens:
                      1. App becomes unresponsive and stops processing data.
                      2. App maxes out 1 CPU core (but isn't doing anything related to its job)
                      3. Visual Studio starts having issues. It seems as if the debugger link between VS and my app gets frozen. I cannot pause/stop my app through VS, and the Diagnostics Tools window stops updating.
                      4. The only way to recover is to end-task the application.
                      When this happens, I took a look at Process Explorer to look at threads and noticed that CoreClr_Shutdown is the function that is maxing out one CPU. I also noticed that there are a lot of MetaDataGetDispenser threads.
                      I am not sure what is happening but I suspect that there is some kind of race condition I am bumping into somewhere in the framework.
                      When .NET 6.0 first came out, I opened a ticket with MS Support using my MSDN subscription. I spent a lot of time and got nowhere. Since upgrading to .NET 6.0.5, this seems to happen a whole lot more.
                      Is there anyone who can help?
                      Below are screen shots of what I see through Process Explorer:
                      image
                      image
                      Reproduction Steps
                      Run my app. Sometimes it happens. Sometimes it does not.
                      Expected behavior
                      The app always runs responsively. If there is a bug in my app, I should still be able to pause/stop through VS.
                      Actual behavior
                      My app freezes and VS starts misbehaving. Trying to pause/stop through VS does nothing and I must end-task my app.
                      Regression?
                      It was an issue and now seems to occur more often since upgrading to .NET 6.0.5.
                      Known Workarounds
                      Kill my app and try again.
                      Configuration
                      .NET 6.0.5
                      
Windows 11
                      
x64
                      
WPF
                      Other information
                      No response
                      Metadata
                      Metadata
                      Assignees
                      No one assigned
                        Labels
                        area-TieredCompilation-coreclrneeds-further-triageIssue has been initially triaged, but needs deeper consideration or reconsideration
                        Type
                        No type
                        Projects
                        No projects
                          Milestone
                          Relationships
                          None yet
                          Development
                          No branches or pull requests
                          Issue actions
                          
, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers");
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

                          Skip to content
                          CoreCLR_Shutdown and MetaDataGetDispenser Hang #69462
                          Closed
                          Closed
                          CoreCLR_Shutdown and MetaDataGetDispenser Hang#69462
                          Labels
                          area-TieredCompilation-coreclrneeds-further-triageIssue has been initially triaged, but needs deeper consideration or reconsideration
                          Milestone
                          7.0.0
                          Description
                          @TonyValenti
                          TonyValenti
                          opened on May 17, 2022
                          Description
                          I have a highly concurrent application that ETL's data between systems.
                          It usually works just fine, however, sometimes it will hang (even when debugging). When it does, the following happens:
                          1. App becomes unresponsive and stops processing data.
                          2. App maxes out 1 CPU core (but isn't doing anything related to its job)
                          3. Visual Studio starts having issues. It seems as if the debugger link between VS and my app gets frozen. I cannot pause/stop my app through VS, and the Diagnostics Tools window stops updating.
                          4. The only way to recover is to end-task the application.
                          When this happens, I took a look at Process Explorer to look at threads and noticed that CoreClr_Shutdown is the function that is maxing out one CPU. I also noticed that there are a lot of MetaDataGetDispenser threads.
                          I am not sure what is happening but I suspect that there is some kind of race condition I am bumping into somewhere in the framework.
                          When .NET 6.0 first came out, I opened a ticket with MS Support using my MSDN subscription. I spent a lot of time and got nowhere. Since upgrading to .NET 6.0.5, this seems to happen a whole lot more.
                          Is there anyone who can help?
                          Below are screen shots of what I see through Process Explorer:
                          image
                          image
                          Reproduction Steps
                          Run my app. Sometimes it happens. Sometimes it does not.
                          Expected behavior
                          The app always runs responsively. If there is a bug in my app, I should still be able to pause/stop through VS.
                          Actual behavior
                          My app freezes and VS starts misbehaving. Trying to pause/stop through VS does nothing and I must end-task my app.
                          Regression?
                          It was an issue and now seems to occur more often since upgrading to .NET 6.0.5.
                          Known Workarounds
                          Kill my app and try again.
                          Configuration
                          .NET 6.0.5
                          
Windows 11
                          
x64
                          
WPF
                          Other information
                          No response
                          Metadata
                          Metadata
                          Assignees
                          No one assigned
                            Labels
                            area-TieredCompilation-coreclrneeds-further-triageIssue has been initially triaged, but needs deeper consideration or reconsideration
                            Type
                            No type
                            Projects
                            No projects
                              Milestone
                              Relationships
                              None yet
                              Development
                              No branches or pull requests
                              Issue actions
                              
, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Universal Dark Mode - works on any site\n(function() {\n var enabled = true;\n \n function applyDarkMode() {\n if (!enabled) return;\n \n // Create style element if it doesn't exist\n var style = document.getElementById('universal-dark-mode-style');\n if (!style) {\n style = document.createElement('style');\n style.id = 'universal-dark-mode-style';\n document.head.appendChild(style);\n }\n \n // Dark mode CSS - inverts colors but preserves images/video\n style.textContent = '\n /* Invert everything except media */\n html {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #1a1a2e !important;\n }\n \n /* Restore images, videos, iframes, canvas */\n img, video, iframe, canvas, svg, picture, [style*=\"background-image\"] {\n filter: invert(1) hue-rotate(180deg) !important;\n }\n \n /* Preserve specific elements that should not be inverted */\n .no-dark-mode, .no-dark-mode *,\n [data-theme=\"light\"], [data-theme=\"light\"],\n .ace_editor, .ace_editor *,\n .CodeMirror, .CodeMirror *,\n .monaco-editor, .monaco-editor *,\n .markdown-body pre, .markdown-body pre *,\n .highlight, .highlight *,\n pre code, pre code * {\n filter: none !important;\n }\n \n /* Fix common UI elements */\n .modal, .popup, .dropdown-menu, .tooltip, .popover {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #2d2d44 !important;\n border-color: #444 !important;\n }\n \n /* Scrollbars */\n ::-webkit-scrollbar { background: #1a1a2e !important; }\n ::-webkit-scrollbar-thumb { background: #444 !important; }\n ::-webkit-scrollbar-thumb:hover { background: #555 !important; }\n \n /* Selection */\n ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ';\n }\n \n function removeDarkMode() {\n var style = document.getElementById('universal-dark-mode-style');\n if (style) style.remove();\n }\n \n // Toggle with Alt+Shift+D\n document.addEventListener('keydown', function(e) {\n if (e.altKey && e.shiftKey && e.key === 'D') {\n e.preventDefault();\n enabled = !enabled;\n if (enabled) {\n applyDarkMode();\n console.log('[Universal Dark Mode] Enabled');\n } else {\n removeDarkMode();\n console.log('[Universal Dark Mode] Disabled');\n }\n }\n });\n \n // Apply on load\n applyDarkMode();\n \n // Re-apply on dynamic content\n var observer = new MutationObserver(function(mutations) {\n if (enabled && !document.getElementById('universal-dark-mode-style')) {\n applyDarkMode();\n }\n });\n observer.observe(document.head, { childList: true });\n \n console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');\n})();", "Universal Dark Mode");
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();

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                              CoreCLR_Shutdown and MetaDataGetDispenser Hang #69462
                              Closed
                              Closed
                              CoreCLR_Shutdown and MetaDataGetDispenser Hang#69462
                              Labels
                              area-TieredCompilation-coreclrneeds-further-triageIssue has been initially triaged, but needs deeper consideration or reconsideration
                              Milestone
                              7.0.0
                              Description
                              @TonyValenti
                              TonyValenti
                              opened on May 17, 2022
                              Description
                              I have a highly concurrent application that ETL's data between systems.
                              It usually works just fine, however, sometimes it will hang (even when debugging). When it does, the following happens:
                              1. App becomes unresponsive and stops processing data.
                              2. App maxes out 1 CPU core (but isn't doing anything related to its job)
                              3. Visual Studio starts having issues. It seems as if the debugger link between VS and my app gets frozen. I cannot pause/stop my app through VS, and the Diagnostics Tools window stops updating.
                              4. The only way to recover is to end-task the application.
                              When this happens, I took a look at Process Explorer to look at threads and noticed that CoreClr_Shutdown is the function that is maxing out one CPU. I also noticed that there are a lot of MetaDataGetDispenser threads.
                              I am not sure what is happening but I suspect that there is some kind of race condition I am bumping into somewhere in the framework.
                              When .NET 6.0 first came out, I opened a ticket with MS Support using my MSDN subscription. I spent a lot of time and got nowhere. Since upgrading to .NET 6.0.5, this seems to happen a whole lot more.
                              Is there anyone who can help?
                              Below are screen shots of what I see through Process Explorer:
                              image
                              image
                              Reproduction Steps
                              Run my app. Sometimes it happens. Sometimes it does not.
                              Expected behavior
                              The app always runs responsively. If there is a bug in my app, I should still be able to pause/stop through VS.
                              Actual behavior
                              My app freezes and VS starts misbehaving. Trying to pause/stop through VS does nothing and I must end-task my app.
                              Regression?
                              It was an issue and now seems to occur more often since upgrading to .NET 6.0.5.
                              Known Workarounds
                              Kill my app and try again.
                              Configuration
                              .NET 6.0.5
                              
Windows 11
                              
x64
                              
WPF
                              Other information
                              No response
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                                area-TieredCompilation-coreclrneeds-further-triageIssue has been initially triaged, but needs deeper consideration or reconsideration
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