java.nio.file.FileAlreadyExistsException with 2.5.0

[flyingmachine]

I'm getting this exception:

Writing pom.xml and pom.properties...
Adding uberjar entries...
              clojure.lang.ExceptionInfo: java.nio.file.FileAlreadyExistsException: /Users/daniel/.boot/cache/tmp/Users/daniel/tmp/boot-test/1bkh/f0sqpx/META-INF/LICENSE -> /Users/daniel/.boot/cache/tmp/Users/daniel/tmp/boot-test/1bkh/-7kd6cy/0ee08843093c5758536dc3e48dafa949.1450364772000
    data: {:file
           "/var/folders/r9/q84t_zy931x_9qx87db0zgdc0000gn/T/boot.user2865336977302176468.clj",
           :line 21}
 java.util.concurrent.ExecutionException: java.nio.file.FileAlreadyExistsException: /Users/daniel/.boot/cache/tmp/Users/daniel/tmp/boot-test/1bkh/f0sqpx/META-INF/LICENSE -> /Users/daniel/.boot/cache/tmp/Users/daniel/tmp/boot-test/1bkh/-7kd6cy/0ee08843093c5758536dc3e48dafa949.1450364772000
java.nio.file.FileAlreadyExistsException: /Users/daniel/.boot/cache/tmp/Users/daniel/tmp/boot-test/1bkh/f0sqpx/META-INF/LICENSE -> /Users/daniel/.boot/cache/tmp/Users/daniel/tmp/boot-test/1bkh/-7kd6cy/0ee08843093c5758536dc3e48dafa949.1450364772000
         file: "/Users/daniel/.boot/cache/tmp/Users/daniel/tmp/boot-test/1bkh/f0sqpx/META-INF/LICENSE"
    otherFile: "/Users/daniel/.boot/cache/tmp/Users/daniel/tmp/boot-test/1bkh/-7kd6cy/0ee08843093c5758536dc3e48dafa949.1450364772000"
sun.nio.fs.UnixException.translateToIOException           UnixException.java:   88
  sun.nio.fs.UnixException.rethrowAsIOException           UnixException.java:  102
   sun.nio.fs.UnixFileSystemProvider.createLink  UnixFileSystemProvider.java:  476
                                            ...                                   
                            boot.file/hard-link                     file.clj:  145
                    boot.file/copy-with-lastmod                     file.clj:  161
                 boot.tmpdir.TmpFileSet/commit!                   tmpdir.clj:  230
                              boot.core/commit!                     core.clj:  391
                 boot.task.built-in/fn/fn/fn/fn                 built_in.clj:  495
                 boot.task.built-in/fn/fn/fn/fn                 built_in.clj:  340
                            boot.core/run-tasks                     core.clj:  797
                              boot.core/boot/fn                     core.clj:  807
            clojure.core/binding-conveyor-fn/fn                     core.clj: 1916

Here's a minimal build.boot:

(set-env!
 :source-paths   #{"src"}
 :resource-paths #{"resources"}
 :dependencies '[[com.datomic/datomic-free   "0.9.5206"]])

(deftask build
  "Builds an uberjar"
  []
  (comp (pom :project 'test :version "0.1.0")
        (uber)
        (aot :namespace '#{test.core})
        (jar :main 'test.core)))

test.core/-main just prints "hello world", and there aren't any other files.

[micha]

@flyingmachine I think this may be fixed by one of the commits we made today...but I'm not sure. I just tried with boot version 2.5.1-SNAPSHOT and everything is ok, as far as I can tell. I did need to add Clojure to :dependencies and (:gen-class) to the test.core namespace declaration. Can you please try with 2.5.1-SNAPSHOT and see if the problem still exists?

You can use a snapshot version of boot by setting BOOT_VERSION=2.5.1-SNAPSHOT in your boot.properties file.

[danielsz]

I've seen very similar errors, but I had all reasons to suspect something was amiss with the filesystem. Lo and behold, after running fsck on the partition, the errors went away.