{"id":23813,"date":"2024-03-16T02:03:13","date_gmt":"2024-03-16T02:03:13","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/what-should-i-do-if-the-multiprocessing-pool-in-python-cannot-terminate-normally\/"},"modified":"2024-03-22T02:10:52","modified_gmt":"2024-03-22T02:10:52","slug":"what-should-i-do-if-the-multiprocessing-pool-in-python-cannot-terminate-normally","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/what-should-i-do-if-the-multiprocessing-pool-in-python-cannot-terminate-normally\/","title":{"rendered":"What should I do if the multiprocessing.pool in Python cannot terminate normally?"},"content":{"rendered":"<p>If the multiprocessing pool doesn&#8217;t terminate properly, there are several possible solutions.<\/p>\n<ol>\n<li>Stop the pool.<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">from<\/span> multiprocessing <span class=\"hljs-keyword\">import<\/span> Pool\r\n\r\n<span class=\"hljs-keyword\">def<\/span> <span class=\"hljs-title function_\">func<\/span>(<span class=\"hljs-params\">x<\/span>):\r\n    <span class=\"hljs-comment\"># \u4efb\u52a1\u51fd\u6570<\/span>\r\n\r\n<span class=\"hljs-keyword\">if<\/span> __name__ == <span class=\"hljs-string\">\"__main__\"<\/span>:\r\n    pool = Pool()\r\n    <span class=\"hljs-keyword\">try<\/span>:\r\n        <span class=\"hljs-comment\"># \u6267\u884c\u4efb\u52a1<\/span>\r\n        pool.<span class=\"hljs-built_in\">map<\/span>(func, <span class=\"hljs-built_in\">range<\/span>(<span class=\"hljs-number\">10<\/span>))\r\n    <span class=\"hljs-keyword\">finally<\/span>:\r\n        <span class=\"hljs-comment\"># \u5f3a\u5236\u7ec8\u6b62\u8fdb\u7a0b\u6c60<\/span>\r\n        pool.terminate()\r\n<\/code><\/pre>\n<ol>\n<li>Close the pool.<\/li>\n<li>Wait for all processes in the Pool to finish their tasks.<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">from<\/span> multiprocessing <span class=\"hljs-keyword\">import<\/span> Pool\r\n\r\n<span class=\"hljs-keyword\">def<\/span> <span class=\"hljs-title function_\">func<\/span>(<span class=\"hljs-params\">x<\/span>):\r\n    <span class=\"hljs-comment\"># \u4efb\u52a1\u51fd\u6570<\/span>\r\n\r\n<span class=\"hljs-keyword\">if<\/span> __name__ == <span class=\"hljs-string\">\"__main__\"<\/span>:\r\n    pool = Pool()\r\n    <span class=\"hljs-keyword\">try<\/span>:\r\n        <span class=\"hljs-comment\"># \u6267\u884c\u4efb\u52a1<\/span>\r\n        pool.<span class=\"hljs-built_in\">map<\/span>(func, <span class=\"hljs-built_in\">range<\/span>(<span class=\"hljs-number\">10<\/span>))\r\n    <span class=\"hljs-keyword\">finally<\/span>:\r\n        <span class=\"hljs-comment\"># \u5173\u95ed\u8fdb\u7a0b\u6c60<\/span>\r\n        pool.close()\r\n        <span class=\"hljs-comment\"># \u7b49\u5f85\u6240\u6709\u5de5\u4f5c\u8fdb\u7a0b\u5b8c\u6210<\/span>\r\n        pool.join()\r\n<\/code><\/pre>\n<ol>\n<li>Check if the task function may potentially result in an infinite loop or deadlock situation. If such issues exist in the task function, it is necessary to fix them to ensure that the process can terminate properly.<\/li>\n<li>Check to see if there is any other code blocking the main process from ending properly. Make sure all child processes have finished before continuing with the execution of the main process code.<\/li>\n<\/ol>\n<p>The above are some common solutions, the specific method chosen depends on the specific situation.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>If the multiprocessing pool doesn&#8217;t terminate properly, there are several possible solutions. Stop the pool. from multiprocessing import Pool def func(x): # \u4efb\u52a1\u51fd\u6570 if __name__ == &#8220;__main__&#8221;: pool = Pool() try: # \u6267\u884c\u4efb\u52a1 pool.map(func, range(10)) finally: # \u5f3a\u5236\u7ec8\u6b62\u8fdb\u7a0b\u6c60 pool.terminate() Close the pool. Wait for all processes in the Pool to finish their tasks. from multiprocessing [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-23813","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>What should I do if the multiprocessing.pool in Python cannot terminate normally? - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/blog\/what-should-i-do-if-the-multiprocessing-pool-in-python-cannot-terminate-normally\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What should I do if the multiprocessing.pool in Python cannot terminate normally?\" \/>\n<meta property=\"og:description\" content=\"If the multiprocessing pool doesn&#8217;t terminate properly, there are several possible solutions. Stop the pool. from multiprocessing import Pool def func(x): # \u4efb\u52a1\u51fd\u6570 if __name__ == &quot;__main__&quot;: pool = Pool() try: # \u6267\u884c\u4efb\u52a1 pool.map(func, range(10)) finally: # \u5f3a\u5236\u7ec8\u6b62\u8fdb\u7a0b\u6c60 pool.terminate() Close the pool. Wait for all processes in the Pool to finish their tasks. from multiprocessing [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/blog\/what-should-i-do-if-the-multiprocessing-pool-in-python-cannot-terminate-normally\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/SiliCloudGlobal\/\" \/>\n<meta property=\"article:published_time\" content=\"2024-03-16T02:03:13+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-03-22T02:10:52+00:00\" \/>\n<meta name=\"author\" content=\"Emily Johnson\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@SiliCloudGlobal\" \/>\n<meta name=\"twitter:site\" content=\"@SiliCloudGlobal\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Emily Johnson\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/what-should-i-do-if-the-multiprocessing-pool-in-python-cannot-terminate-normally\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/what-should-i-do-if-the-multiprocessing-pool-in-python-cannot-terminate-normally\/\"},\"author\":{\"name\":\"Emily Johnson\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/3b041b19cffc258705478ecfab895378\"},\"headline\":\"What should I do if the multiprocessing.pool in Python cannot terminate normally?\",\"datePublished\":\"2024-03-16T02:03:13+00:00\",\"dateModified\":\"2024-03-22T02:10:52+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/what-should-i-do-if-the-multiprocessing-pool-in-python-cannot-terminate-normally\/\"},\"wordCount\":128,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/#organization\"},\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/what-should-i-do-if-the-multiprocessing-pool-in-python-cannot-terminate-normally\/\",\"url\":\"https:\/\/www.silicloud.com\/blog\/what-should-i-do-if-the-multiprocessing-pool-in-python-cannot-terminate-normally\/\",\"name\":\"What should I do if the multiprocessing.pool in Python cannot terminate normally? - Blog - Silicon Cloud\",\"isPartOf\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/#website\"},\"datePublished\":\"2024-03-16T02:03:13+00:00\",\"dateModified\":\"2024-03-22T02:10:52+00:00\",\"breadcrumb\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/what-should-i-do-if-the-multiprocessing-pool-in-python-cannot-terminate-normally\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.silicloud.com\/blog\/what-should-i-do-if-the-multiprocessing-pool-in-python-cannot-terminate-normally\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/what-should-i-do-if-the-multiprocessing-pool-in-python-cannot-terminate-normally\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/www.silicloud.com\/blog\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"What should I do if the multiprocessing.pool in Python cannot terminate normally?\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/#website\",\"url\":\"https:\/\/www.silicloud.com\/blog\/\",\"name\":\"Silicon Cloud Blog\",\"description\":\"\",\"publisher\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/#organization\"},\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/#organization\",\"name\":\"Silicon Cloud Blog\",\"url\":\"https:\/\/www.silicloud.com\/blog\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/#\/schema\/logo\/image\/\",\"url\":\"https:\/\/www.silicloud.com\/blog\/wp-content\/uploads\/2023\/11\/EN-SILICON-Full.png\",\"contentUrl\":\"https:\/\/www.silicloud.com\/blog\/wp-content\/uploads\/2023\/11\/EN-SILICON-Full.png\",\"width\":1024,\"height\":1024,\"caption\":\"Silicon Cloud Blog\"},\"image\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/#\/schema\/logo\/image\/\"},\"sameAs\":[\"https:\/\/www.facebook.com\/SiliCloudGlobal\/\",\"https:\/\/twitter.com\/SiliCloudGlobal\"]},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/3b041b19cffc258705478ecfab895378\",\"name\":\"Emily Johnson\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/a5cb4e73d02ab1d79f2dfe919389ff7c1de072baa97686392031c03d858cc358?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/a5cb4e73d02ab1d79f2dfe919389ff7c1de072baa97686392031c03d858cc358?s=96&d=mm&r=g\",\"caption\":\"Emily Johnson\"},\"url\":\"https:\/\/www.silicloud.com\/blog\/author\/emilyjohnson\/\"}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"What should I do if the multiprocessing.pool in Python cannot terminate normally? - Blog - Silicon Cloud","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.silicloud.com\/blog\/what-should-i-do-if-the-multiprocessing-pool-in-python-cannot-terminate-normally\/","og_locale":"en_US","og_type":"article","og_title":"What should I do if the multiprocessing.pool in Python cannot terminate normally?","og_description":"If the multiprocessing pool doesn&#8217;t terminate properly, there are several possible solutions. Stop the pool. from multiprocessing import Pool def func(x): # \u4efb\u52a1\u51fd\u6570 if __name__ == \"__main__\": pool = Pool() try: # \u6267\u884c\u4efb\u52a1 pool.map(func, range(10)) finally: # \u5f3a\u5236\u7ec8\u6b62\u8fdb\u7a0b\u6c60 pool.terminate() Close the pool. Wait for all processes in the Pool to finish their tasks. from multiprocessing [&hellip;]","og_url":"https:\/\/www.silicloud.com\/blog\/what-should-i-do-if-the-multiprocessing-pool-in-python-cannot-terminate-normally\/","og_site_name":"Blog - Silicon Cloud","article_publisher":"https:\/\/www.facebook.com\/SiliCloudGlobal\/","article_published_time":"2024-03-16T02:03:13+00:00","article_modified_time":"2024-03-22T02:10:52+00:00","author":"Emily Johnson","twitter_card":"summary_large_image","twitter_creator":"@SiliCloudGlobal","twitter_site":"@SiliCloudGlobal","twitter_misc":{"Written by":"Emily Johnson","Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.silicloud.com\/blog\/what-should-i-do-if-the-multiprocessing-pool-in-python-cannot-terminate-normally\/#article","isPartOf":{"@id":"https:\/\/www.silicloud.com\/blog\/what-should-i-do-if-the-multiprocessing-pool-in-python-cannot-terminate-normally\/"},"author":{"name":"Emily Johnson","@id":"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/3b041b19cffc258705478ecfab895378"},"headline":"What should I do if the multiprocessing.pool in Python cannot terminate normally?","datePublished":"2024-03-16T02:03:13+00:00","dateModified":"2024-03-22T02:10:52+00:00","mainEntityOfPage":{"@id":"https:\/\/www.silicloud.com\/blog\/what-should-i-do-if-the-multiprocessing-pool-in-python-cannot-terminate-normally\/"},"wordCount":128,"commentCount":0,"publisher":{"@id":"https:\/\/www.silicloud.com\/blog\/#organization"},"inLanguage":"en-US"},{"@type":"WebPage","@id":"https:\/\/www.silicloud.com\/blog\/what-should-i-do-if-the-multiprocessing-pool-in-python-cannot-terminate-normally\/","url":"https:\/\/www.silicloud.com\/blog\/what-should-i-do-if-the-multiprocessing-pool-in-python-cannot-terminate-normally\/","name":"What should I do if the multiprocessing.pool in Python cannot terminate normally? - Blog - Silicon Cloud","isPartOf":{"@id":"https:\/\/www.silicloud.com\/blog\/#website"},"datePublished":"2024-03-16T02:03:13+00:00","dateModified":"2024-03-22T02:10:52+00:00","breadcrumb":{"@id":"https:\/\/www.silicloud.com\/blog\/what-should-i-do-if-the-multiprocessing-pool-in-python-cannot-terminate-normally\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.silicloud.com\/blog\/what-should-i-do-if-the-multiprocessing-pool-in-python-cannot-terminate-normally\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/www.silicloud.com\/blog\/what-should-i-do-if-the-multiprocessing-pool-in-python-cannot-terminate-normally\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.silicloud.com\/blog\/"},{"@type":"ListItem","position":2,"name":"What should I do if the multiprocessing.pool in Python cannot terminate normally?"}]},{"@type":"WebSite","@id":"https:\/\/www.silicloud.com\/blog\/#website","url":"https:\/\/www.silicloud.com\/blog\/","name":"Silicon Cloud Blog","description":"","publisher":{"@id":"https:\/\/www.silicloud.com\/blog\/#organization"},"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/www.silicloud.com\/blog\/#organization","name":"Silicon Cloud Blog","url":"https:\/\/www.silicloud.com\/blog\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.silicloud.com\/blog\/#\/schema\/logo\/image\/","url":"https:\/\/www.silicloud.com\/blog\/wp-content\/uploads\/2023\/11\/EN-SILICON-Full.png","contentUrl":"https:\/\/www.silicloud.com\/blog\/wp-content\/uploads\/2023\/11\/EN-SILICON-Full.png","width":1024,"height":1024,"caption":"Silicon Cloud Blog"},"image":{"@id":"https:\/\/www.silicloud.com\/blog\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.facebook.com\/SiliCloudGlobal\/","https:\/\/twitter.com\/SiliCloudGlobal"]},{"@type":"Person","@id":"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/3b041b19cffc258705478ecfab895378","name":"Emily Johnson","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/a5cb4e73d02ab1d79f2dfe919389ff7c1de072baa97686392031c03d858cc358?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/a5cb4e73d02ab1d79f2dfe919389ff7c1de072baa97686392031c03d858cc358?s=96&d=mm&r=g","caption":"Emily Johnson"},"url":"https:\/\/www.silicloud.com\/blog\/author\/emilyjohnson\/"}]}},"_links":{"self":[{"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/posts\/23813","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/comments?post=23813"}],"version-history":[{"count":1,"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/posts\/23813\/revisions"}],"predecessor-version":[{"id":57812,"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/posts\/23813\/revisions\/57812"}],"wp:attachment":[{"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/media?parent=23813"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/categories?post=23813"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/tags?post=23813"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}