I get this Exception when running a play app that uses the crud module. the strange thing is that when i get this error and i refresh web page the play app works and page is loaded correctly. it seems the play compiler -in DEV mode- can’t compile CRUD class in first request. i don’t know why the play compiler in DEV mode frequently fails compiling some classes in my play web app?<\/p>\n
i use eclipse IDE & i suspect that eclipse locks some java source files and prevent play from compiling the java sources ; however i’m not sure of this. There might be some reason that causes play DEV mode compiler to fail & i can’t figure it out. this issue is happening to me a lot these days while working on a play web app.<\/p>\n
what this error means and how to fix it?<\/p>\n
ERROR ~ \n\n@69g88ea66\nInternal Server Error (500) for request GET \/\n\nTemplate execution error (In {module:crud}\/app\/views\/tags\/crud\/types.tag around line 3)\nExecution error occured in template {module:crud}\/app\/views\/tags\/crud\/types.tag. Exception raised was NullPointerException : null.\n\nplay.exceptions.TemplateExecutionException\n at play.templates.BaseTemplate.throwException(BaseTemplate.java:86)\n at play.templates.GroovyTemplate.internalRender(GroovyTemplate.java:257)\n at play.templates.GroovyTemplate$ExecutableTemplate.invokeTag(GroovyTemplate.java:379)\n at \/conf\/routes.(line:42)\n at play.templates.GroovyTemplate.internalRender(GroovyTemplate.java:232)\n at play.templates.Template.render(Template.java:26)\n at play.templates.GroovyTemplate.render(GroovyTemplate.java:187)\n at play.mvc.Router.parse(Router.java:162)\n at play.mvc.Router.load(Router.java:48)\n at play.mvc.Router.detectChanges(Router.java:219)\n at Invocation.HTTP Request(Play!)\nCaused by: java.lang.NullPointerException\n at play.classloading.ApplicationCompiler$2.acceptResult(ApplicationCompiler.java:266)\n at org.eclipse.jdt.internal.compiler.Compiler.compile(Compiler.java:478)\n at play.classloading.ApplicationCompiler.compile(ApplicationCompiler.java:282)\n at play.classloading.ApplicationClassloader.getAllClasses(ApplicationClassloader.java:424)\n at play.classloading.ApplicationClassloader.getAssignableClasses(ApplicationClassloader.java:453)\n at play.classloading.ApplicationClassloader$getAssignableClasses.call(Unknown Source)\n at {module:crud}\/app\/views\/tags\/crud\/types.tag.(line:3)\n at play.templates.GroovyTemplate.internalRender(GroovyTemplate.java:232)\n ... 9 more\n<\/code><\/pre>\n—————UPDATE—————-<\/p>\n
CRUD routes that i use in routes file. do i need to delete them ?<\/p>\n
#{crud.types}\nGET \/? ${type.controllerClass.name.substring(12).replace('$','')}.index\nGET \/${type.controllerName} ${type.controllerClass.name.substring(12).replace('$','')}.list\nGET \/${type.controllerName}\/new ${type.controllerClass.name.substring(12).replace('$','')}.blank\nGET \/${type.controllerName}\/{id} ${type.controllerClass.name.substring(12).replace('$','')}.show\nGET \/${type.controllerName}\/{id}\/{field} ${type.controllerClass.name.substring(12).replace('$','')}.attachment\nGET \/${type.controllerName}\/{id}\/edit ${type.controllerClass.name.substring(12).replace('$','')}.edit\nPOST \/${type.controllerName} ${type.controllerClass.name.substring(12).replace('$','')}.create\nPOST \/${type.controllerName}\/{id} ${type.controllerClass.name.substring(12).replace('$','')}.save\nDELETE \/${type.controllerName}\/{id} ${type.controllerClass.name.substring(12).replace('$','')}.delete\n#{\/crud.types}\n<\/code><\/pre>\nOriginally posted 2013-12-02 21:18:09. <\/small><\/p>","protected":false},"excerpt":{"rendered":"
I get this Exception when running a play app that uses the crud module. the strange thing is that when i get this error and i refresh web page the play app works and page is loaded correctly. it seems the play compiler -in DEV mode- can’t compile CRUD class in first request. i don’t […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1918","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/posts\/1918","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/comments?post=1918"}],"version-history":[{"count":0,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/posts\/1918\/revisions"}],"wp:attachment":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/media?parent=1918"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/categories?post=1918"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/tags?post=1918"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}