{"id":350,"date":"2022-09-14T10:19:21","date_gmt":"2022-09-14T10:19:21","guid":{"rendered":"https:\/\/jassweb.com\/new22\/solved-java-thread-join-does-not-release-the-lock\/"},"modified":"2022-09-14T10:19:21","modified_gmt":"2022-09-14T10:19:21","slug":"solved-java-thread-join-does-not-release-the-lock-2","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-java-thread-join-does-not-release-the-lock-2\/","title":{"rendered":"[Solved] Java \u2013 Thread.join( ) does not release the lock"},"content":{"rendered":"<h2> Introduction <\/h2>\n<p>[ad_1]<\/p>\n<p>Thread.join() is a method in Java that allows one thread to wait for the completion of another thread. It is commonly used to synchronize the execution of threads. However, it has been observed that Thread.join() does not always release the lock, which can lead to deadlocks and other issues. In this article, we will discuss the reasons why Thread.join() does not release the lock and how to avoid this issue. We will also look at some best practices for using Thread.join() in Java.<\/p>\n<h2> Solution<\/h2>\n<p><\/p>\n<p>The thread.join() method does not release the lock. It is used to wait for a thread to finish its execution before continuing with the current thread. It is used to synchronize the execution of threads. When a thread calls join(), it will block the current thread until the thread it joins with completes its execution. <\/p>\n<p><\/p>\n<div class=\"entry-content\" itemprop=\"text\">\n<script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-1088640234840270\" crossorigin=\"anonymous\"><\/script><br \/>\n<script><\/p>\n<p><\/script><\/p>\n<p><\/p>\n<div id=\"answer-46842742\" class=\"answer js-answer accepted-answer js-accepted-answer\" data-answerid=\"46842742\" data-parentid=\"46842714\" data-score=\"5\" data-position-on-page=\"1\" data-highest-scored=\"1\" data-question-has-accepted-highest-score=\"1\" itemprop=\"acceptedAnswer\" itemscope itemtype=\"https:\/\/schema.org\/Answer\">\n<div class=\"post-layout\">\n<div class=\"votecell post-layout--left\"><\/div>\n<div class=\"answercell post-layout--right\">\n<div class=\"s-prose js-post-body\" itemprop=\"text\">\n<p>That\u2019s because <code>Thread.join()<\/code> doesn\u2019t release any locks. You\u2019ve designed a perfectly working deadlock, where <code>Thread-1<\/code> is waiting for <code>Thread-2<\/code> to die having locked on <code>Foo<\/code>, and <code>Thread-2<\/code> is waiting to lock on <code>Foo<\/code>.<\/p>\n<p>(Technically speaking the current implementation does release locks, as it uses internally <code>wait()<\/code> while synchronized on <code>Thread<\/code>. However that\u2019s an internal mechanism not related to user code)<\/p>\n<\/div>\n<div class=\"mt24\"><\/div>\n<\/div>\n<p> <span class=\"d-none\" itemprop=\"commentCount\"><\/span> <\/p>\n<\/div>\n<\/div>\n<p>solved Java \u2013 Thread.join( ) does not release the lock <\/p>\n<p><script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-1088640234840270\" crossorigin=\"anonymous\"><\/script><br \/>\n<script><\/p>\n<p><\/script><\/div>\n<p>[ad_2]<\/p>\n<h1>Solved: Java \u2013 Thread.join() Does Not Release the Lock<\/h1>\n<p>Thread.join() is a method in Java that allows one thread to wait for the completion of another thread. It is commonly used to synchronize the execution of threads. However, it has been observed that Thread.join() does not release the lock, which can lead to deadlocks in certain situations.<\/p>\n<p>A deadlock occurs when two or more threads are blocked forever, waiting for each other. This can happen when two threads are trying to acquire the same lock, and each thread is waiting for the other to release the lock. In this case, neither thread can proceed, and the application will hang.<\/p>\n<p>The problem with Thread.join() is that it does not release the lock. This means that if two threads are trying to acquire the same lock, and one thread calls Thread.join() on the other, the lock will not be released until the thread that called Thread.join() is finished. This can lead to deadlocks in certain situations.<\/p>\n<p>The solution to this problem is to use a different synchronization mechanism, such as a ReentrantLock. A ReentrantLock is a type of lock that can be acquired and released multiple times by the same thread. This means that if one thread calls Thread.join() on another thread, the lock will be released when the thread that called Thread.join() is finished.<\/p>\n<p>In summary, Thread.join() does not release the lock, which can lead to deadlocks in certain situations. The solution is to use a different synchronization mechanism, such as a ReentrantLock.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Introduction [ad_1] Thread.join() is a method in Java that allows one thread to wait for the completion of another thread. It is commonly used to synchronize the execution of threads. However, it has been observed that Thread.join() does not always release the lock, which can lead to deadlocks and other issues. In this article, we &#8230; <a title=\"[Solved] Java \u2013 Thread.join( ) does not release the lock\" class=\"read-more\" href=\"https:\/\/jassweb.com\/solved\/solved-java-thread-join-does-not-release-the-lock-2\/\" aria-label=\"More on [Solved] Java \u2013 Thread.join( ) does not release the lock\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[320],"tags":[323,884],"class_list":["post-350","post","type-post","status-publish","format-standard","hentry","category-solved","tag-java","tag-multithreading"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>[Solved] Java \u2013 Thread.join( ) does not release the lock - JassWeb<\/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:\/\/jassweb.com\/solved\/solved-java-thread-join-does-not-release-the-lock-2\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] Java \u2013 Thread.join( ) does not release the lock - JassWeb\" \/>\n<meta property=\"og:description\" content=\"Introduction [ad_1] Thread.join() is a method in Java that allows one thread to wait for the completion of another thread. It is commonly used to synchronize the execution of threads. However, it has been observed that Thread.join() does not always release the lock, which can lead to deadlocks and other issues. In this article, we ... Read more\" \/>\n<meta property=\"og:url\" content=\"https:\/\/jassweb.com\/solved\/solved-java-thread-join-does-not-release-the-lock-2\/\" \/>\n<meta property=\"og:site_name\" content=\"JassWeb\" \/>\n<meta property=\"article:published_time\" content=\"2022-09-14T10:19:21+00:00\" \/>\n<meta name=\"author\" content=\"Kirat\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Kirat\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/jassweb.com\/solved\/solved-java-thread-join-does-not-release-the-lock-2\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/jassweb.com\/solved\/solved-java-thread-join-does-not-release-the-lock-2\/\"},\"author\":{\"name\":\"Kirat\",\"@id\":\"https:\/\/jassweb.com\/solved\/#\/schema\/person\/65c9c7b7958150c0dc8371fa35dd7c31\"},\"headline\":\"[Solved] Java \u2013 Thread.join( ) does not release the lock\",\"datePublished\":\"2022-09-14T10:19:21+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/jassweb.com\/solved\/solved-java-thread-join-does-not-release-the-lock-2\/\"},\"wordCount\":481,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/jassweb.com\/solved\/#organization\"},\"keywords\":[\"java\",\"multithreading\"],\"articleSection\":[\"Solved\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/jassweb.com\/solved\/solved-java-thread-join-does-not-release-the-lock-2\/\",\"url\":\"https:\/\/jassweb.com\/solved\/solved-java-thread-join-does-not-release-the-lock-2\/\",\"name\":\"[Solved] Java \u2013 Thread.join( ) does not release the lock - JassWeb\",\"isPartOf\":{\"@id\":\"https:\/\/jassweb.com\/solved\/#website\"},\"datePublished\":\"2022-09-14T10:19:21+00:00\",\"breadcrumb\":{\"@id\":\"https:\/\/jassweb.com\/solved\/solved-java-thread-join-does-not-release-the-lock-2\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/jassweb.com\/solved\/solved-java-thread-join-does-not-release-the-lock-2\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/jassweb.com\/solved\/solved-java-thread-join-does-not-release-the-lock-2\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/jassweb.com\/solved\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"[Solved] Java \u2013 Thread.join( ) does not release the lock\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/jassweb.com\/solved\/#website\",\"url\":\"https:\/\/jassweb.com\/solved\/\",\"name\":\"JassWeb\",\"description\":\"Build High-quality Websites\",\"publisher\":{\"@id\":\"https:\/\/jassweb.com\/solved\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/jassweb.com\/solved\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\/\/jassweb.com\/solved\/#organization\",\"name\":\"Jass Web\",\"url\":\"https:\/\/jassweb.com\/solved\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/jassweb.com\/solved\/#\/schema\/logo\/image\/\",\"url\":\"https:\/\/jassweb.com\/wp-content\/uploads\/2021\/02\/jass-website-logo-1.png\",\"contentUrl\":\"https:\/\/jassweb.com\/wp-content\/uploads\/2021\/02\/jass-website-logo-1.png\",\"width\":693,\"height\":132,\"caption\":\"Jass Web\"},\"image\":{\"@id\":\"https:\/\/jassweb.com\/solved\/#\/schema\/logo\/image\/\"}},{\"@type\":\"Person\",\"@id\":\"https:\/\/jassweb.com\/solved\/#\/schema\/person\/65c9c7b7958150c0dc8371fa35dd7c31\",\"name\":\"Kirat\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/jassweb.com\/solved\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/jassweb.com\/solved\/wp-content\/litespeed\/avatar\/1261af3c9451399fa1336d28b98ea3bb.jpg?ver=1775798750\",\"contentUrl\":\"https:\/\/jassweb.com\/solved\/wp-content\/litespeed\/avatar\/1261af3c9451399fa1336d28b98ea3bb.jpg?ver=1775798750\",\"caption\":\"Kirat\"},\"sameAs\":[\"http:\/\/jassweb.com\"],\"url\":\"https:\/\/jassweb.com\/solved\/author\/jaspritsinghghumangmail-com\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"[Solved] Java \u2013 Thread.join( ) does not release the lock - JassWeb","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:\/\/jassweb.com\/solved\/solved-java-thread-join-does-not-release-the-lock-2\/","og_locale":"en_US","og_type":"article","og_title":"[Solved] Java \u2013 Thread.join( ) does not release the lock - JassWeb","og_description":"Introduction [ad_1] Thread.join() is a method in Java that allows one thread to wait for the completion of another thread. It is commonly used to synchronize the execution of threads. However, it has been observed that Thread.join() does not always release the lock, which can lead to deadlocks and other issues. In this article, we ... Read more","og_url":"https:\/\/jassweb.com\/solved\/solved-java-thread-join-does-not-release-the-lock-2\/","og_site_name":"JassWeb","article_published_time":"2022-09-14T10:19:21+00:00","author":"Kirat","twitter_card":"summary_large_image","twitter_misc":{"Written by":"Kirat","Est. reading time":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/jassweb.com\/solved\/solved-java-thread-join-does-not-release-the-lock-2\/#article","isPartOf":{"@id":"https:\/\/jassweb.com\/solved\/solved-java-thread-join-does-not-release-the-lock-2\/"},"author":{"name":"Kirat","@id":"https:\/\/jassweb.com\/solved\/#\/schema\/person\/65c9c7b7958150c0dc8371fa35dd7c31"},"headline":"[Solved] Java \u2013 Thread.join( ) does not release the lock","datePublished":"2022-09-14T10:19:21+00:00","mainEntityOfPage":{"@id":"https:\/\/jassweb.com\/solved\/solved-java-thread-join-does-not-release-the-lock-2\/"},"wordCount":481,"commentCount":0,"publisher":{"@id":"https:\/\/jassweb.com\/solved\/#organization"},"keywords":["java","multithreading"],"articleSection":["Solved"],"inLanguage":"en-US"},{"@type":"WebPage","@id":"https:\/\/jassweb.com\/solved\/solved-java-thread-join-does-not-release-the-lock-2\/","url":"https:\/\/jassweb.com\/solved\/solved-java-thread-join-does-not-release-the-lock-2\/","name":"[Solved] Java \u2013 Thread.join( ) does not release the lock - JassWeb","isPartOf":{"@id":"https:\/\/jassweb.com\/solved\/#website"},"datePublished":"2022-09-14T10:19:21+00:00","breadcrumb":{"@id":"https:\/\/jassweb.com\/solved\/solved-java-thread-join-does-not-release-the-lock-2\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/jassweb.com\/solved\/solved-java-thread-join-does-not-release-the-lock-2\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/jassweb.com\/solved\/solved-java-thread-join-does-not-release-the-lock-2\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/jassweb.com\/solved\/"},{"@type":"ListItem","position":2,"name":"[Solved] Java \u2013 Thread.join( ) does not release the lock"}]},{"@type":"WebSite","@id":"https:\/\/jassweb.com\/solved\/#website","url":"https:\/\/jassweb.com\/solved\/","name":"JassWeb","description":"Build High-quality Websites","publisher":{"@id":"https:\/\/jassweb.com\/solved\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/jassweb.com\/solved\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/jassweb.com\/solved\/#organization","name":"Jass Web","url":"https:\/\/jassweb.com\/solved\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/jassweb.com\/solved\/#\/schema\/logo\/image\/","url":"https:\/\/jassweb.com\/wp-content\/uploads\/2021\/02\/jass-website-logo-1.png","contentUrl":"https:\/\/jassweb.com\/wp-content\/uploads\/2021\/02\/jass-website-logo-1.png","width":693,"height":132,"caption":"Jass Web"},"image":{"@id":"https:\/\/jassweb.com\/solved\/#\/schema\/logo\/image\/"}},{"@type":"Person","@id":"https:\/\/jassweb.com\/solved\/#\/schema\/person\/65c9c7b7958150c0dc8371fa35dd7c31","name":"Kirat","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/jassweb.com\/solved\/#\/schema\/person\/image\/","url":"https:\/\/jassweb.com\/solved\/wp-content\/litespeed\/avatar\/1261af3c9451399fa1336d28b98ea3bb.jpg?ver=1775798750","contentUrl":"https:\/\/jassweb.com\/solved\/wp-content\/litespeed\/avatar\/1261af3c9451399fa1336d28b98ea3bb.jpg?ver=1775798750","caption":"Kirat"},"sameAs":["http:\/\/jassweb.com"],"url":"https:\/\/jassweb.com\/solved\/author\/jaspritsinghghumangmail-com\/"}]}},"_links":{"self":[{"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/posts\/350","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/comments?post=350"}],"version-history":[{"count":0,"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/posts\/350\/revisions"}],"wp:attachment":[{"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/media?parent=350"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/categories?post=350"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/tags?post=350"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}