{"id":581,"date":"2019-03-05T21:46:56","date_gmt":"2019-03-06T02:46:56","guid":{"rendered":"https:\/\/crossan007.dev\/blog\/?p=581"},"modified":"2019-07-09T11:50:06","modified_gmt":"2019-07-09T15:50:06","slug":"til-java-code-in-jenkins-pipelines-run-on-the-master","status":"publish","type":"post","link":"https:\/\/crossan007.dev\/blog\/jenkins\/til-java-code-in-jenkins-pipelines-run-on-the-master\/","title":{"rendered":"TIL: Java code in Jenkins pipelines run on the Master"},"content":{"rendered":"\n<div class=\"twitter-share\"><a href=\"https:\/\/twitter.com\/intent\/tweet?via=crossan007\" class=\"twitter-share-button\">Tweet<\/a><\/div>\n\n<p>I was trying to read a file with <code>Java.io.File<\/code> in a Jenkins Groovy Scripted Pipeline on a non-master node.  I  kept getting an exception that the file was not found (<code>java.io.FileNotFoundException<\/code>)<\/p>\n\n\n\n<p>Turns out that Java code written in scripted pipelines (Groovy) runs on the master node:  <a href=\"https:\/\/issues.jenkins-ci.org\/browse\/JENKINS-37577\">https:\/\/issues.jenkins-ci.org\/browse\/JENKINS-37577<\/a>.  This is as-designed behavior, and accessing files in the workspace on a non-master node should use the <code><code>readFile<\/code><\/code> function in the Pipeline Basic Steps DSL <a href=\"https:\/\/jenkins.io\/doc\/pipeline\/steps\/workflow-basic-steps\/#pwd-determine-current-directory\">https:\/\/jenkins.io\/doc\/pipeline\/steps\/workflow-basic-steps\/#pwd-determine-current-directory<\/a><\/p>\n\n\n\n<p>I&#8217;m thoroughly embarrassed at how many failed Jenkins jobs and alerts I&#8217;ve triggered while discovering this.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>I was trying to read a file with Java.io.File in a Jenkins Groovy Scripted Pipeline on a non-master node. I kept getting an exception that the file was not found (java.io.FileNotFoundException) Turns out that Java code written in scripted pipelines (Groovy) runs on the master node: https:\/\/issues.jenkins-ci.org\/browse\/JENKINS-37577. This is as-designed behavior, and accessing files in &hellip; <a href=\"https:\/\/crossan007.dev\/blog\/jenkins\/til-java-code-in-jenkins-pipelines-run-on-the-master\/\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">TIL: Java code in Jenkins pipelines run on the Master<\/span> <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[229,259],"tags":[232,234,233,231,236,230],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v17.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/crossan007.dev\/blog\/jenkins\/til-java-code-in-jenkins-pipelines-run-on-the-master\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"TIL: Java code in Jenkins pipelines run on the Master - Charles&#039; Blog\" \/>\n<meta property=\"og:description\" content=\"I was trying to read a file with Java.io.File in a Jenkins Groovy Scripted Pipeline on a non-master node. I kept getting an exception that the file was not found (java.io.FileNotFoundException) Turns out that Java code written in scripted pipelines (Groovy) runs on the master node: https:\/\/issues.jenkins-ci.org\/browse\/JENKINS-37577. This is as-designed behavior, and accessing files in &hellip; Continue reading TIL: Java code in Jenkins pipelines run on the Master &rarr;\" \/>\n<meta property=\"og:url\" content=\"https:\/\/crossan007.dev\/blog\/jenkins\/til-java-code-in-jenkins-pipelines-run-on-the-master\/\" \/>\n<meta property=\"og:site_name\" content=\"Charles&#039; Blog\" \/>\n<meta property=\"article:published_time\" content=\"2019-03-06T02:46:56+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2019-07-09T15:50:06+00:00\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"crossan007\" \/>\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\":\"WebSite\",\"@id\":\"https:\/\/crossan007.dev\/blog\/#website\",\"url\":\"https:\/\/crossan007.dev\/blog\/\",\"name\":\"Charles&#039; Blog\",\"description\":\"SharePoint | PowerShell | Exchange | SCCM | Ubuntu | PHP | JavaScript | A\/V Live Production | More...\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/crossan007.dev\/blog\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/crossan007.dev\/blog\/jenkins\/til-java-code-in-jenkins-pipelines-run-on-the-master\/#webpage\",\"url\":\"https:\/\/crossan007.dev\/blog\/jenkins\/til-java-code-in-jenkins-pipelines-run-on-the-master\/\",\"name\":\"TIL: Java code in Jenkins pipelines run on the Master - Charles&#039; Blog\",\"isPartOf\":{\"@id\":\"https:\/\/crossan007.dev\/blog\/#website\"},\"datePublished\":\"2019-03-06T02:46:56+00:00\",\"dateModified\":\"2019-07-09T15:50:06+00:00\",\"author\":{\"@id\":\"https:\/\/crossan007.dev\/blog\/#\/schema\/person\/bd99569cd81332c8fd866d023848b979\"},\"breadcrumb\":{\"@id\":\"https:\/\/crossan007.dev\/blog\/jenkins\/til-java-code-in-jenkins-pipelines-run-on-the-master\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/crossan007.dev\/blog\/jenkins\/til-java-code-in-jenkins-pipelines-run-on-the-master\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/crossan007.dev\/blog\/jenkins\/til-java-code-in-jenkins-pipelines-run-on-the-master\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/crossan007.dev\/blog\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"TIL: Java code in Jenkins pipelines run on the Master\"}]},{\"@type\":\"Person\",\"@id\":\"https:\/\/crossan007.dev\/blog\/#\/schema\/person\/bd99569cd81332c8fd866d023848b979\",\"name\":\"crossan007\",\"image\":{\"@type\":\"ImageObject\",\"@id\":\"https:\/\/crossan007.dev\/blog\/#personlogo\",\"inLanguage\":\"en-US\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/fff72c74fb6a0da29accf0db83ad4b4b?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/fff72c74fb6a0da29accf0db83ad4b4b?s=96&d=mm&r=g\",\"caption\":\"crossan007\"},\"url\":\"https:\/\/crossan007.dev\/blog\/author\/crossan007\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"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:\/\/crossan007.dev\/blog\/jenkins\/til-java-code-in-jenkins-pipelines-run-on-the-master\/","og_locale":"en_US","og_type":"article","og_title":"TIL: Java code in Jenkins pipelines run on the Master - Charles&#039; Blog","og_description":"I was trying to read a file with Java.io.File in a Jenkins Groovy Scripted Pipeline on a non-master node. I kept getting an exception that the file was not found (java.io.FileNotFoundException) Turns out that Java code written in scripted pipelines (Groovy) runs on the master node: https:\/\/issues.jenkins-ci.org\/browse\/JENKINS-37577. This is as-designed behavior, and accessing files in &hellip; Continue reading TIL: Java code in Jenkins pipelines run on the Master &rarr;","og_url":"https:\/\/crossan007.dev\/blog\/jenkins\/til-java-code-in-jenkins-pipelines-run-on-the-master\/","og_site_name":"Charles&#039; Blog","article_published_time":"2019-03-06T02:46:56+00:00","article_modified_time":"2019-07-09T15:50:06+00:00","twitter_misc":{"Written by":"crossan007","Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebSite","@id":"https:\/\/crossan007.dev\/blog\/#website","url":"https:\/\/crossan007.dev\/blog\/","name":"Charles&#039; Blog","description":"SharePoint | PowerShell | Exchange | SCCM | Ubuntu | PHP | JavaScript | A\/V Live Production | More...","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/crossan007.dev\/blog\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"en-US"},{"@type":"WebPage","@id":"https:\/\/crossan007.dev\/blog\/jenkins\/til-java-code-in-jenkins-pipelines-run-on-the-master\/#webpage","url":"https:\/\/crossan007.dev\/blog\/jenkins\/til-java-code-in-jenkins-pipelines-run-on-the-master\/","name":"TIL: Java code in Jenkins pipelines run on the Master - Charles&#039; Blog","isPartOf":{"@id":"https:\/\/crossan007.dev\/blog\/#website"},"datePublished":"2019-03-06T02:46:56+00:00","dateModified":"2019-07-09T15:50:06+00:00","author":{"@id":"https:\/\/crossan007.dev\/blog\/#\/schema\/person\/bd99569cd81332c8fd866d023848b979"},"breadcrumb":{"@id":"https:\/\/crossan007.dev\/blog\/jenkins\/til-java-code-in-jenkins-pipelines-run-on-the-master\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/crossan007.dev\/blog\/jenkins\/til-java-code-in-jenkins-pipelines-run-on-the-master\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/crossan007.dev\/blog\/jenkins\/til-java-code-in-jenkins-pipelines-run-on-the-master\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/crossan007.dev\/blog\/"},{"@type":"ListItem","position":2,"name":"TIL: Java code in Jenkins pipelines run on the Master"}]},{"@type":"Person","@id":"https:\/\/crossan007.dev\/blog\/#\/schema\/person\/bd99569cd81332c8fd866d023848b979","name":"crossan007","image":{"@type":"ImageObject","@id":"https:\/\/crossan007.dev\/blog\/#personlogo","inLanguage":"en-US","url":"https:\/\/secure.gravatar.com\/avatar\/fff72c74fb6a0da29accf0db83ad4b4b?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/fff72c74fb6a0da29accf0db83ad4b4b?s=96&d=mm&r=g","caption":"crossan007"},"url":"https:\/\/crossan007.dev\/blog\/author\/crossan007\/"}]}},"_links":{"self":[{"href":"https:\/\/crossan007.dev\/blog\/wp-json\/wp\/v2\/posts\/581"}],"collection":[{"href":"https:\/\/crossan007.dev\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/crossan007.dev\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/crossan007.dev\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/crossan007.dev\/blog\/wp-json\/wp\/v2\/comments?post=581"}],"version-history":[{"count":2,"href":"https:\/\/crossan007.dev\/blog\/wp-json\/wp\/v2\/posts\/581\/revisions"}],"predecessor-version":[{"id":583,"href":"https:\/\/crossan007.dev\/blog\/wp-json\/wp\/v2\/posts\/581\/revisions\/583"}],"wp:attachment":[{"href":"https:\/\/crossan007.dev\/blog\/wp-json\/wp\/v2\/media?parent=581"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/crossan007.dev\/blog\/wp-json\/wp\/v2\/categories?post=581"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/crossan007.dev\/blog\/wp-json\/wp\/v2\/tags?post=581"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}