Over a million developers have joined DZone.

Fixed: Embedded Jetty Fails To Unpack With FileNotFoundException: Not a directory

DZone's Guide to

Fixed: Embedded Jetty Fails To Unpack With FileNotFoundException: Not a directory

· Java Zone
Free Resource

Microservices! They are everywhere, or at least, the term is. When should you use a microservice architecture? What factors should be considered when making that decision? Do the benefits outweigh the costs? Why is everyone so excited about them, anyway?  Brought to you in partnership with IBM.

I have built an executable .war with an embedded Jetty and all the dependencies packed in using the Maven Shade and War plugins. When I tried to run it (java -jar <my war>.war) then I got a strange FileNotFoundException during the unpack phase. It was strange because the unpack code actually checks whether a file’s parent directory exists and creates it if it doesn’t.

The problem was that I use OS X which has a case-insensitive filesystem. A directory contained both the file LICENSE and the directory license/. When Jetty tried to unpack license/LICENSE.base64.txt, the check for the parent directory (license/) incorrectly succeeded (because it checked new File("[..]/license/LICENSE.base64.txt").getParentFile().exists() and that returned true because the file LICENSE already was there, and it wasn’t distinguished from the actual directory license; .isDirectory() would have at least failed.) The workaround was to exclude the offensive file from the archive:

<project ...>
                                <transformer implementation="org.apache.maven.plugins.shade.resource.ServicesResourceTransformer"/>
                                        <exclude>META-INF/LICENSE</exclude> <!-- conflicts on OS X with license/) -->

This was the original exception:

2013-10-02 13:44:16.557:WARN:oejw.WebAppContext:main: Failed startup of context o.e.j.w.WebAppContext@76959acc{/,null,null}{file:/Users/me/FakePM/target/fake-pm-with-dependencies.war}
java.io.FileNotFoundException: /private/var/folders/k0/2842tm752zv1dh4q77_gmgdr0000gn/T/jetty- (Not a directory)
    at java.io.FileOutputStream.open(Native Method)
    at java.io.FileOutputStream.<init>(FileOutputStream.java:212)
    at java.io.FileOutputStream.<init>(FileOutputStream.java:165)
    at org.eclipse.jetty.util.resource.JarResource.copyTo(JarResource.java:237)
    at org.eclipse.jetty.webapp.WebInfConfiguration.unpack(WebInfConfiguration.java:478)
    at org.eclipse.jetty.webapp.WebInfConfiguration.preConfigure(WebInfConfiguration.java:72)
    at org.eclipse.jetty.webapp.WebAppContext.preConfigure(WebAppContext.java:453)
    at org.eclipse.jetty.webapp.WebAppContext.doStart(WebAppContext.java:489)
    at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:69)
    at org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:108)
    at org.eclipse.jetty.server.Server.start(Server.java:342)
    at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:90)
    at org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:58)
    at org.eclipse.jetty.server.Server.doStart(Server.java:290)
    at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:69)
    at no.viatravel.poc.safecc.profilemaster.Main.startServerAndBlock(Main.java:123)
    at no.viatravel.poc.safecc.profilemaster.Main.main(Main.java:38)
2013-10-02 13:44:16.575:INFO:oejs.ServerConnector:main: Started ServerConnector@478bc78e{HTTP/1.1}{}

See JarResource.java:230 in jetty 9.0.5.x for the relevant code.

Discover how the Watson team is further developing SDKs in Java, Node.js, Python, iOS, and Android to access these services and make programming easy. Brought to you in partnership with IBM.


Published at DZone with permission of Jakub Holý, DZone MVB. See the original article here.

Opinions expressed by DZone contributors are their own.


Dev Resources & Solutions Straight to Your Inbox

Thanks for subscribing!

Awesome! Check your inbox to verify your email so you can start receiving the latest in tech news and resources.


{{ parent.title || parent.header.title}}

{{ parent.tldr }}

{{ parent.urlSource.name }}