Fixed blob stream deadlock - #260

Open
he-is-harry wants to merge 1 commit into
SAP:masterfrom
he-is-harry:issue233
Open

Fixed blob stream deadlock#260
he-is-harry wants to merge 1 commit into
SAP:masterfrom
he-is-harry:issue233

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@he-is-harry

@he-is-harryhe-is-harry commented Mar 6, 2025

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Fixed the issue in #233 where streaming blobs out of the database into another table can cause a deadlock

  • Added a "blocked" mode to the Queue which prevents tasks from running except for the blocking task and READ_LOB tasks
  • Modified ExecuteTask's run to free the queue while it waits for the Writer's getParameters
    • The callback of getParameters will enqueue the task again to send the packet
    • Before the freeing of the queue to the next task, ExecuteTask will block the queue to only allow itself and READ_LOB tasks to run
      • This prevents issues where exec's can run at the same time which will lead to HANA disconnecting and sending invalid LOB locator id errors

@he-is-harry
Fixed blob stream deadlock
e0b5816
Fixed the issue in SAP#233 where streaming blobs out of the
database into another table can cause a deadlock
- Added a "blocked" mode to the Queue which prevents tasks from running
except for the blocking task and READ_LOB tasks
- Modified ExecuteTask's run to free the queue while it waits for the
Writer's getParameters
- The callback of getParameters will enqueue the task again to send
the packet
- Before the freeing of the queue to the next task, ExecuteTask will
block the queue to only allow itself and READ_LOB tasks to run
- This prevents issues where exec's can run at the same time
which will lead to HANA disconnecting and sending invalid LOB locator id
errors
@BobdenOs

BobdenOs commented Jun 11, 2025

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Please also refer to bugzilla 323457 and jira 23394. When that underlying issue is resolved it allows the client to remove the queue completely. Which provides additional benefits, but requires the client to consider the packet count in the responses.

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@he-is-harry@BobdenOs
, '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
Fixed blob stream deadlock - #260
Open
he-is-harry wants to merge 1 commit into
SAP:masterfrom 
he-is-harry:issue233
Open
Fixed blob stream deadlock#260
he-is-harry wants to merge 1 commit into
SAP:masterfrom 
he-is-harry:issue233
Conversation
@he-is-harry
@he-is-harryhe-is-harry
commented
Mar 6, 2025

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Fixed the issue in #233 where streaming blobs out of the database into another table can cause a deadlock
  • Added a "blocked" mode to the Queue which prevents tasks from running except for the blocking task and READ_LOB tasks
  • Modified ExecuteTask's run to free the queue while it waits for the Writer's getParameters

    • The callback of getParameters will enqueue the task again to send the packet
    • Before the freeing of the queue to the next task, ExecuteTask will block the queue to only allow itself and READ_LOB tasks to run

      • This prevents issues where exec's can run at the same time which will lead to HANA disconnecting and sending invalid LOB locator id errors
@he-is-harry
Fixed blob stream deadlock
e0b5816
Fixed the issue in SAP#233 where streaming blobs out of the
database into another table can cause a deadlock
- Added a "blocked" mode to the Queue which prevents tasks from running
except for the blocking task and READ_LOB tasks
- Modified ExecuteTask's run to free the queue while it waits for the
Writer's getParameters
- The callback of getParameters will enqueue the task again to send
the packet
- Before the freeing of the queue to the next task, ExecuteTask will
block the queue to only allow itself and READ_LOB tasks to run
- This prevents issues where exec's can run at the same time
which will lead to HANA disconnecting and sending invalid LOB locator id
errors
@BobdenOs
BobdenOs
commented
Jun 11, 2025

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Please also refer to bugzilla 323457 and jira 23394. When that underlying issue is resolved it allows the client to remove the queue completely. Which provides additional benefits, but requires the client to consider the packet count in the responses.
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2 participants

@he-is-harry@BobdenOs

, '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
Fixed blob stream deadlock - #260
Open
he-is-harry wants to merge 1 commit into
SAP:masterfrom 
he-is-harry:issue233
Open
Fixed blob stream deadlock#260
he-is-harry wants to merge 1 commit into
SAP:masterfrom 
he-is-harry:issue233
Conversation
@he-is-harry
@he-is-harryhe-is-harry
commented
Mar 6, 2025

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Fixed the issue in #233 where streaming blobs out of the database into another table can cause a deadlock
  • Added a "blocked" mode to the Queue which prevents tasks from running except for the blocking task and READ_LOB tasks
  • Modified ExecuteTask's run to free the queue while it waits for the Writer's getParameters

    • The callback of getParameters will enqueue the task again to send the packet
    • Before the freeing of the queue to the next task, ExecuteTask will block the queue to only allow itself and READ_LOB tasks to run

      • This prevents issues where exec's can run at the same time which will lead to HANA disconnecting and sending invalid LOB locator id errors
@he-is-harry
Fixed blob stream deadlock
e0b5816
Fixed the issue in SAP#233 where streaming blobs out of the
database into another table can cause a deadlock
- Added a "blocked" mode to the Queue which prevents tasks from running
except for the blocking task and READ_LOB tasks
- Modified ExecuteTask's run to free the queue while it waits for the
Writer's getParameters
- The callback of getParameters will enqueue the task again to send
the packet
- Before the freeing of the queue to the next task, ExecuteTask will
block the queue to only allow itself and READ_LOB tasks to run
- This prevents issues where exec's can run at the same time
which will lead to HANA disconnecting and sending invalid LOB locator id
errors
@BobdenOs
BobdenOs
commented
Jun 11, 2025

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Contributor
Please also refer to bugzilla 323457 and jira 23394. When that underlying issue is resolved it allows the client to remove the queue completely. Which provides additional benefits, but requires the client to consider the packet count in the responses.
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2 participants

@he-is-harry@BobdenOs

, '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
Fixed blob stream deadlock - #260
Open
he-is-harry wants to merge 1 commit into
SAP:masterfrom 
he-is-harry:issue233
Open
Fixed blob stream deadlock#260
he-is-harry wants to merge 1 commit into
SAP:masterfrom 
he-is-harry:issue233
Conversation
@he-is-harry
@he-is-harryhe-is-harry
commented
Mar 6, 2025

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Contributor
Fixed the issue in #233 where streaming blobs out of the database into another table can cause a deadlock
  • Added a "blocked" mode to the Queue which prevents tasks from running except for the blocking task and READ_LOB tasks
  • Modified ExecuteTask's run to free the queue while it waits for the Writer's getParameters

    • The callback of getParameters will enqueue the task again to send the packet
    • Before the freeing of the queue to the next task, ExecuteTask will block the queue to only allow itself and READ_LOB tasks to run

      • This prevents issues where exec's can run at the same time which will lead to HANA disconnecting and sending invalid LOB locator id errors
@he-is-harry
Fixed blob stream deadlock
e0b5816
Fixed the issue in SAP#233 where streaming blobs out of the
database into another table can cause a deadlock
- Added a "blocked" mode to the Queue which prevents tasks from running
except for the blocking task and READ_LOB tasks
- Modified ExecuteTask's run to free the queue while it waits for the
Writer's getParameters
- The callback of getParameters will enqueue the task again to send
the packet
- Before the freeing of the queue to the next task, ExecuteTask will
block the queue to only allow itself and READ_LOB tasks to run
- This prevents issues where exec's can run at the same time
which will lead to HANA disconnecting and sending invalid LOB locator id
errors
@BobdenOs
BobdenOs
commented
Jun 11, 2025

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Contributor
Please also refer to bugzilla 323457 and jira 23394. When that underlying issue is resolved it allows the client to remove the queue completely. Which provides additional benefits, but requires the client to consider the packet count in the responses.
Sign up for freeto join this conversation on GitHub.
Already have an account?
Sign in to comment

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2 participants

@he-is-harry@BobdenOs

, '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
Fixed blob stream deadlock - #260
Open
he-is-harry wants to merge 1 commit into
SAP:masterfrom 
he-is-harry:issue233
Open
Fixed blob stream deadlock#260
he-is-harry wants to merge 1 commit into
SAP:masterfrom 
he-is-harry:issue233
Conversation
@he-is-harry
@he-is-harryhe-is-harry
commented
Mar 6, 2025

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Contributor
Fixed the issue in #233 where streaming blobs out of the database into another table can cause a deadlock
  • Added a "blocked" mode to the Queue which prevents tasks from running except for the blocking task and READ_LOB tasks
  • Modified ExecuteTask's run to free the queue while it waits for the Writer's getParameters

    • The callback of getParameters will enqueue the task again to send the packet
    • Before the freeing of the queue to the next task, ExecuteTask will block the queue to only allow itself and READ_LOB tasks to run

      • This prevents issues where exec's can run at the same time which will lead to HANA disconnecting and sending invalid LOB locator id errors
@he-is-harry
Fixed blob stream deadlock
e0b5816
Fixed the issue in SAP#233 where streaming blobs out of the
database into another table can cause a deadlock
- Added a "blocked" mode to the Queue which prevents tasks from running
except for the blocking task and READ_LOB tasks
- Modified ExecuteTask's run to free the queue while it waits for the
Writer's getParameters
- The callback of getParameters will enqueue the task again to send
the packet
- Before the freeing of the queue to the next task, ExecuteTask will
block the queue to only allow itself and READ_LOB tasks to run
- This prevents issues where exec's can run at the same time
which will lead to HANA disconnecting and sending invalid LOB locator id
errors
@BobdenOs
BobdenOs
commented
Jun 11, 2025

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Contributor
Please also refer to bugzilla 323457 and jira 23394. When that underlying issue is resolved it allows the client to remove the queue completely. Which provides additional benefits, but requires the client to consider the packet count in the responses.
Sign up for freeto join this conversation on GitHub.
Already have an account?
Sign in to comment

Reviewers


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Successfully merging this pull request may close these issues.

2 participants

@he-is-harry@BobdenOs

, '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
Fixed blob stream deadlock - #260
Open
he-is-harry wants to merge 1 commit into
SAP:masterfrom 
he-is-harry:issue233
Open
Fixed blob stream deadlock#260
he-is-harry wants to merge 1 commit into
SAP:masterfrom 
he-is-harry:issue233
Conversation
@he-is-harry
@he-is-harryhe-is-harry
commented
Mar 6, 2025

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Contributor
Fixed the issue in #233 where streaming blobs out of the database into another table can cause a deadlock
  • Added a "blocked" mode to the Queue which prevents tasks from running except for the blocking task and READ_LOB tasks
  • Modified ExecuteTask's run to free the queue while it waits for the Writer's getParameters

    • The callback of getParameters will enqueue the task again to send the packet
    • Before the freeing of the queue to the next task, ExecuteTask will block the queue to only allow itself and READ_LOB tasks to run

      • This prevents issues where exec's can run at the same time which will lead to HANA disconnecting and sending invalid LOB locator id errors
@he-is-harry
Fixed blob stream deadlock
e0b5816
Fixed the issue in SAP#233 where streaming blobs out of the
database into another table can cause a deadlock
- Added a "blocked" mode to the Queue which prevents tasks from running
except for the blocking task and READ_LOB tasks
- Modified ExecuteTask's run to free the queue while it waits for the
Writer's getParameters
- The callback of getParameters will enqueue the task again to send
the packet
- Before the freeing of the queue to the next task, ExecuteTask will
block the queue to only allow itself and READ_LOB tasks to run
- This prevents issues where exec's can run at the same time
which will lead to HANA disconnecting and sending invalid LOB locator id
errors
@BobdenOs
BobdenOs
commented
Jun 11, 2025

Copy link


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Contributor
Please also refer to bugzilla 323457 and jira 23394. When that underlying issue is resolved it allows the client to remove the queue completely. Which provides additional benefits, but requires the client to consider the packet count in the responses.
Sign up for freeto join this conversation on GitHub.
Already have an account?
Sign in to comment

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Successfully merging this pull request may close these issues.

2 participants

@he-is-harry@BobdenOs

, '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
Fixed blob stream deadlock - #260
Open
he-is-harry wants to merge 1 commit into
SAP:masterfrom 
he-is-harry:issue233
Open
Fixed blob stream deadlock#260
he-is-harry wants to merge 1 commit into
SAP:masterfrom 
he-is-harry:issue233
Conversation
@he-is-harry
@he-is-harryhe-is-harry
commented
Mar 6, 2025

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Contributor
Fixed the issue in #233 where streaming blobs out of the database into another table can cause a deadlock
  • Added a "blocked" mode to the Queue which prevents tasks from running except for the blocking task and READ_LOB tasks
  • Modified ExecuteTask's run to free the queue while it waits for the Writer's getParameters

    • The callback of getParameters will enqueue the task again to send the packet
    • Before the freeing of the queue to the next task, ExecuteTask will block the queue to only allow itself and READ_LOB tasks to run

      • This prevents issues where exec's can run at the same time which will lead to HANA disconnecting and sending invalid LOB locator id errors
@he-is-harry
Fixed blob stream deadlock
e0b5816
Fixed the issue in SAP#233 where streaming blobs out of the
database into another table can cause a deadlock
- Added a "blocked" mode to the Queue which prevents tasks from running
except for the blocking task and READ_LOB tasks
- Modified ExecuteTask's run to free the queue while it waits for the
Writer's getParameters
- The callback of getParameters will enqueue the task again to send
the packet
- Before the freeing of the queue to the next task, ExecuteTask will
block the queue to only allow itself and READ_LOB tasks to run
- This prevents issues where exec's can run at the same time
which will lead to HANA disconnecting and sending invalid LOB locator id
errors
@BobdenOs
BobdenOs
commented
Jun 11, 2025

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Contributor
Please also refer to bugzilla 323457 and jira 23394. When that underlying issue is resolved it allows the client to remove the queue completely. Which provides additional benefits, but requires the client to consider the packet count in the responses.
Sign up for freeto join this conversation on GitHub.
Already have an account?
Sign in to comment

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2 participants

@he-is-harry@BobdenOs

, '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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Fixed blob stream deadlock - #260
Open
he-is-harry wants to merge 1 commit into
SAP:masterfrom 
he-is-harry:issue233
Open
Fixed blob stream deadlock#260
he-is-harry wants to merge 1 commit into
SAP:masterfrom 
he-is-harry:issue233
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@he-is-harry
@he-is-harryhe-is-harry
commented
Mar 6, 2025

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Fixed the issue in #233 where streaming blobs out of the database into another table can cause a deadlock
  • Added a "blocked" mode to the Queue which prevents tasks from running except for the blocking task and READ_LOB tasks
  • Modified ExecuteTask's run to free the queue while it waits for the Writer's getParameters

    • The callback of getParameters will enqueue the task again to send the packet
    • Before the freeing of the queue to the next task, ExecuteTask will block the queue to only allow itself and READ_LOB tasks to run

      • This prevents issues where exec's can run at the same time which will lead to HANA disconnecting and sending invalid LOB locator id errors
@he-is-harry
Fixed blob stream deadlock
e0b5816
Fixed the issue in SAP#233 where streaming blobs out of the
database into another table can cause a deadlock
- Added a "blocked" mode to the Queue which prevents tasks from running
except for the blocking task and READ_LOB tasks
- Modified ExecuteTask's run to free the queue while it waits for the
Writer's getParameters
- The callback of getParameters will enqueue the task again to send
the packet
- Before the freeing of the queue to the next task, ExecuteTask will
block the queue to only allow itself and READ_LOB tasks to run
- This prevents issues where exec's can run at the same time
which will lead to HANA disconnecting and sending invalid LOB locator id
errors
@BobdenOs
BobdenOs
commented
Jun 11, 2025

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Please also refer to bugzilla 323457 and jira 23394. When that underlying issue is resolved it allows the client to remove the queue completely. Which provides additional benefits, but requires the client to consider the packet count in the responses.
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@he-is-harry@BobdenOs