The Java compiler Version 1.6.0 of the OpenJDK is installed on the CSF.<\/p>\n None.<\/p>\n No modulefile is required – the software is installed system wide and available by default.<\/p>\n As a quick test, create a file named Then compile the code using:<\/p>\n Now run the code using:<\/p>\n Due to recent excessive memory usage on the login node, all processes running on that node are now restricted in their memory usage. The You should start an interactive session using qrsh<\/a> to launch a shell on a backend node that has more memory. You can then run javac as normal.<\/p>\n Request an interactive session using:<\/p>\n Please read the Java application launcher<\/a> notes for how to run java code in the batch system with the correct number of threads.<\/p>\n None.<\/p>\n","protected":false},"excerpt":{"rendered":" Overview The Java compiler javac is installed on the CSF but should not be used on the login node. Version 1.6.0 of the OpenJDK is installed on the CSF. Restrictions on use None. Set up procedure No modulefile is required – the software is installed system wide and available by default. Running the application As a quick test, create a file named HelloWorld.java using a text editor on the CSF (e.g. using gedit) which contains.. Read more »<\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"parent":31,"menu_order":0,"comment_status":"open","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-1090","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/ri.itservices.manchester.ac.uk\/csf-apps\/wp-json\/wp\/v2\/pages\/1090","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ri.itservices.manchester.ac.uk\/csf-apps\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/ri.itservices.manchester.ac.uk\/csf-apps\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/ri.itservices.manchester.ac.uk\/csf-apps\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/ri.itservices.manchester.ac.uk\/csf-apps\/wp-json\/wp\/v2\/comments?post=1090"}],"version-history":[{"count":8,"href":"https:\/\/ri.itservices.manchester.ac.uk\/csf-apps\/wp-json\/wp\/v2\/pages\/1090\/revisions"}],"predecessor-version":[{"id":3206,"href":"https:\/\/ri.itservices.manchester.ac.uk\/csf-apps\/wp-json\/wp\/v2\/pages\/1090\/revisions\/3206"}],"up":[{"embeddable":true,"href":"https:\/\/ri.itservices.manchester.ac.uk\/csf-apps\/wp-json\/wp\/v2\/pages\/31"}],"wp:attachment":[{"href":"https:\/\/ri.itservices.manchester.ac.uk\/csf-apps\/wp-json\/wp\/v2\/media?parent=1090"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}javac<\/code> is installed on the CSF but should not<\/strong> be used on the login node. <\/p>\nRestrictions on use<\/h2>\n
Set up procedure<\/h2>\n
Running the application<\/h2>\n
HelloWorld.java<\/code> using a text editor on the CSF (e.g. using gedit<\/code>) which contains the following:<\/p>\n\r\npublic class HelloWorld {\r\n public static void main(String[] args) {\r\n System.out.println(\"Hello World\");\r\n }\r\n}\r\n<\/pre>\n\r\njavac HelloWorld.java\r\n<\/pre>\n
\r\njava HelloWorld\r\n\r\n# It should print:\r\nHello World\r\n<\/pre>\n
javac<\/code> compiler will not<\/strong> execute on the login node, reporting a memory limit error:<\/p>\n\r\nError occurred during initialization of VM\r\nCould not reserve enough space for object heap\r\nCould not create the Java virtual machine.\r\n<\/pre>\n
Interactive Usage<\/h3>\n
\r\nqrsh -l inter -l short\r\n #\r\n # Wait for a new prompt to appear (e.g.,
[username@int00<\/em>]<\/code>)\r\n #\r\njavac ...\r\n<\/pre>\nRunning Compiled Java Code<\/h3>\n
Updates<\/h2>\n