Using Local File in Spring Yarn application - spring-boot

Question

i need deploy the war file on yarn container for that I am using Spring batch for creating a yarn application that uses embedded jetty server to deploy a war file,when i use a customhandle for handling the request it works fine the application get deployed on yarn but when i use war file as a handler it doesnt works i get a error
java.io.FileNotFoundException: /root/jettywebapps/webapps/Login.war
but the file is actually present at the given location i am stuck how to access the war file from the yarn container
#OnContainerStart
public void publicVoidNoArgsMethod() throws Exception {
String jetty_home="/root/jettywebapps";
Server server = new Server(9090);
WebAppContext webapp = new WebAppContext();
webapp.setContextPath("/Login");
webapp.setWar(jetty_home+"/webapps/Login.war");
server.setHandler(webapp);
server.start();
server.join();
}
Here is the Stack Trace
2015-04-17 06:05:14.972] boot - 26920 INFO [main] --- ContainerLauncherRunner: Running YarnContainer with parameters []
[2015-04-17 06:05:14.972] boot - 26920 INFO [main] --- ContainerLauncherRunner: Container requested that we wait state, setting up latch
[2015-04-17 06:05:14.975] boot - 26920 INFO [main] --- DefaultYarnContainer: Processing 1 #YarnComponent handlers
[2015-04-17 06:05:15.038] boot - 26920 INFO [main] --- Server: jetty-8.0.4.v20111024
[2015-04-17 06:05:15.080] boot - 26920 WARN [main] --- WebInfConfiguration: Web application not found /root/jettywebapps/webapps/Login.war
[2015-04-17 06:05:15.081] boot - 26920 WARN [main] --- WebAppContext: Failed startup of context o.e.j.w.WebAppContext{/Login,null},/root/jettywebapps/webapps/Login.war
java.io.FileNotFoundException: /root/jettywebapps/webapps/Login.war
at org.eclipse.jetty.webapp.WebInfConfiguration.unpack(WebInfConfiguration.java:479)
at org.eclipse.jetty.webapp.WebInfConfiguration.preConfigure(WebInfConfiguration.java:52)
at org.eclipse.jetty.webapp.WebAppContext.preConfigure(WebAppContext.java:416)
at org.eclipse.jetty.webapp.WebAppContext.doStart(WebAppContext.java:452)
at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:59)
at org.eclipse.jetty.server.handler.HandlerWrapper.doStart(HandlerWrapper.java:89)
at org.eclipse.jetty.server.Server.doStart(Server.java:262)
at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:59)
at hello.container.HelloPojo.publicVoidNoArgsMethod(HelloPojo.java:40)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.springframework.expression.spel.support.ReflectiveMethodExecutor.execute(ReflectiveMethodExecutor.java:112)
at org.springframework.expression.spel.ast.MethodReference.getValueInternal(MethodReference.java:129)
at org.springframework.expression.spel.ast.MethodReference.access$000(MethodReference.java:49)
at org.springframework.expression.spel.ast.MethodReference$MethodValueRef.getValue(MethodReference.java:342)
at org.springframework.expression.spel.ast.CompoundExpression.getValueInternal(CompoundExpression.java:88)
at org.springframework.expression.spel.ast.SpelNodeImpl.getTypedValue(SpelNodeImpl.java:131)
at org.springframework.expression.spel.standard.SpelExpression.getValue(SpelExpression.java:330)
at org.springframework.yarn.support.AbstractExpressionEvaluator.evaluateExpression(AbstractExpressionEvaluator.java:126)
at org.springframework.yarn.container.ContainerMethodInvokerHelper.processInternal(ContainerMethodInvokerHelper.java:229)
at org.springframework.yarn.container.ContainerMethodInvokerHelper.process(ContainerMethodInvokerHelper.java:115)
at org.springframework.yarn.container.MethodInvokingYarnContainerRuntimeProcessor.process(MethodInvokingYarnContainerRuntimeProcessor.java:51)
at org.springframework.yarn.container.ContainerHandler.handle(ContainerHandler.java:99)
at org.springframework.yarn.container.DefaultYarnContainer.getContainerHandlerResults(DefaultYarnContainer.java:174)
at org.springframework.yarn.container.DefaultYarnContainer.runInternal(DefaultYarnContainer.java:77)
please help
Thanks

Answer 1

the container could fetch local files or hdfs files using following code:
Configuration conf = new Configuration();
FileSystem localFS = FileSystem.get(URI.create("file://localhost"), conf);
OutputStream outATXT = localFS.create(new Path("/home/walterchen/a.txt"));
or
Configuration conf = new Configuration();
FileSystem fs = FileSystem.get(URI.create("hdfs://localhost:9000"), conf);
OutputStream out = fs.create(new Path("/home/a.txt"));