{"id":10119,"date":"2020-02-09T05:20:28","date_gmt":"2020-02-09T05:20:28","guid":{"rendered":"https:\/\/www.devopsschool.com\/blog\/?p=10119"},"modified":"2021-11-12T11:10:51","modified_gmt":"2021-11-12T11:10:51","slug":"mac-os-running-two-java-versions-jenkins-problem","status":"publish","type":"post","link":"https:\/\/www.devopsschool.com\/blog\/mac-os-running-two-java-versions-jenkins-problem\/","title":{"rendered":"Jenkins Error: Running two Java Versions &#8211; Jenkins Problem in Mac OS"},"content":{"rendered":"\n<p>Hi Everyone &#8211; Today we are going to discuss about how to have two version of Java Development Kit running in MAC OS and how to switch between them.<\/p>\n\n\n\n<p>This <strong>problem statement <\/strong>came when I was playing around with Jenkins setup &#8211; As we all Jenkins still demands Java 1.8 ! and not higher . Problem started as I had Java 1.13 as globally installed. Which in turn is not supported by Jenkins Latest version as of Feb 2020.<\/p>\n\n\n\n<p>So when I did something like java -v on cmd , got below response:<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"612\" height=\"101\" src=\"https:\/\/www.devopsschool.com\/blog\/wp-content\/uploads\/2020\/02\/image.png\" alt=\"\" class=\"wp-image-10120\" srcset=\"https:\/\/www.devopsschool.com\/blog\/wp-content\/uploads\/2020\/02\/image.png 612w, https:\/\/www.devopsschool.com\/blog\/wp-content\/uploads\/2020\/02\/image-300x50.png 300w\" sizes=\"auto, (max-width: 612px) 100vw, 612px\" \/><\/figure>\n\n\n\n<p>Then as all I thought no worries let me install the Java 1.8 and day will be saved, so for that I ran this :<\/p>\n\n\n<pre class=\"wp-block-code\"><span><code class=\"hljs\">brew cask install adoptopenjdk\/openjdk\/adoptopenjdk8<\/code><\/span><\/pre>\n\n\n<p>I&#8217;m installing Java via brew &#8211; which I personally believe is easiest way to install Java on mac &#8211; brew is a package manager for Mac OS like <em>Chocolatey<\/em> for Windows.<\/p>\n\n\n\n<p> Which resulted in something like this :<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"635\" height=\"583\" src=\"https:\/\/www.devopsschool.com\/blog\/wp-content\/uploads\/2020\/02\/image-1.png\" alt=\"\" class=\"wp-image-10121\" srcset=\"https:\/\/www.devopsschool.com\/blog\/wp-content\/uploads\/2020\/02\/image-1.png 635w, https:\/\/www.devopsschool.com\/blog\/wp-content\/uploads\/2020\/02\/image-1-300x275.png 300w\" sizes=\"auto, (max-width: 635px) 100vw, 635px\" \/><\/figure>\n\n\n\n<p>Now after this step if you will try &#8211; doing java -v still you will not be able to get java 1.8 as default environment. <\/p>\n\n\n\n<p>So What else we have to do ? Let&#8217;s explore that !<\/p>\n\n\n\n<p>First we will list &#8211; all the java version installed on machine by :<\/p>\n\n\n<pre class=\"wp-block-code\"><span><code class=\"hljs\">\/usr\/libexec\/java_home -V<\/code><\/span><\/pre>\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"831\" height=\"121\" src=\"https:\/\/www.devopsschool.com\/blog\/wp-content\/uploads\/2020\/02\/image-2.png\" alt=\"\" class=\"wp-image-10122\" srcset=\"https:\/\/www.devopsschool.com\/blog\/wp-content\/uploads\/2020\/02\/image-2.png 831w, https:\/\/www.devopsschool.com\/blog\/wp-content\/uploads\/2020\/02\/image-2-300x44.png 300w, https:\/\/www.devopsschool.com\/blog\/wp-content\/uploads\/2020\/02\/image-2-768x112.png 768w\" sizes=\"auto, (max-width: 831px) 100vw, 831px\" \/><\/figure>\n\n\n\n<p>We can see I have two versions now.<\/p>\n\n\n\n<p>Lets make 1.8 as default version  by running : <\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-1\" data-shcb-language-name=\"JavaScript\" data-shcb-language-slug=\"javascript\"><span><code class=\"hljs language-javascript\"><span class=\"hljs-keyword\">export<\/span> JAVA_HOME=<span class=\"hljs-string\">`\/usr\/libexec\/java_home -v 1.8`<\/span><\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-1\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">JavaScript<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">javascript<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>In above command I&#8217;m pointing JAVA_HOME to 1.8 version explicitly.<\/p>\n\n\n\n<p>Lets run java -version again !<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"565\" height=\"99\" src=\"https:\/\/www.devopsschool.com\/blog\/wp-content\/uploads\/2020\/02\/image-3.png\" alt=\"\" class=\"wp-image-10123\" srcset=\"https:\/\/www.devopsschool.com\/blog\/wp-content\/uploads\/2020\/02\/image-3.png 565w, https:\/\/www.devopsschool.com\/blog\/wp-content\/uploads\/2020\/02\/image-3-300x53.png 300w\" sizes=\"auto, (max-width: 565px) 100vw, 565px\" \/><\/figure>\n\n\n\n<p>Caution &#8211; Java 1.8 does not support short hand for version i.e -v instead you have to type : java -version full command to get the output.<\/p>\n\n\n\n<p><a href=\"https:\/\/www.linkedin.com\/in\/gaurav-bajpai-fullstack\/\" target=\"_blank\" rel=\"noopener\">Gaurav Bajpai<\/a><\/p>\n\n\n<div class=\"epyt-gallery\" data-currpage=\"1\" id=\"epyt_gallery_37379\"><iframe loading=\"lazy\"  id=\"_ytid_50769\"  width=\"760\" height=\"427\"  data-origwidth=\"760\" data-origheight=\"427\" src=\"https:\/\/www.youtube.com\/embed\/?enablejsapi=1&#038;autoplay=0&#038;cc_load_policy=0&#038;cc_lang_pref=&#038;iv_load_policy=1&#038;loop=0&#038;rel=1&#038;fs=1&#038;playsinline=0&#038;autohide=2&#038;theme=dark&#038;color=red&#038;controls=1&#038;disablekb=0&#038;\" class=\"__youtube_prefs__  no-lazyload\" title=\"YouTube player\"  data-epytgalleryid=\"epyt_gallery_37379\"  allow=\"fullscreen; accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen data-no-lazy=\"1\" data-skipgform_ajax_framebjll=\"\"><\/iframe><div class=\"epyt-gallery-list\"><div>Sorry, there was a YouTube error.<\/div><\/div><\/div>","protected":false},"excerpt":{"rendered":"<p>Hi Everyone &#8211; Today we are going to discuss about how to have two version of Java Development Kit running in MAC OS and how to switch between them. This&#8230; <\/p>\n","protected":false},"author":23,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_joinchat":[],"footnotes":""},"categories":[5886,42],"tags":[5603,173,3310,830],"class_list":["post-10119","post","type-post","status-publish","format-standard","hentry","category-java","category-jenkins","tag-gauravbajpai","tag-java","tag-java-system-properties-access-guide","tag-jenkins-guide"],"_links":{"self":[{"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/posts\/10119","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/users\/23"}],"replies":[{"embeddable":true,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/comments?post=10119"}],"version-history":[{"count":4,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/posts\/10119\/revisions"}],"predecessor-version":[{"id":24966,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/posts\/10119\/revisions\/24966"}],"wp:attachment":[{"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/media?parent=10119"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/categories?post=10119"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/tags?post=10119"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}