[Swift-devel] Re: some racelike condition on file stagein

[Ben Clifford]

File.mkdirs() is not thread-safe, according to typing "threadsafe java 
mkdirs" into google.

I applied the below patch to my cog checkout and the error goes away for 
me. However, I'm not a cog developer, so someone else needs to fix this in 
the CoG SVN.

Index: cog/modules/provider-local/src/org/globus/cog/abstraction/impl/file/local/FileResourceImpl.java
===================================================================
--- cog.orig/modules/provider-local/src/org/globus/cog/abstraction/impl/file/local/FileResourceImpl.java	2007-08-27 09:30:23.000000000 +0100
+++ cog/modules/provider-local/src/org/globus/cog/abstraction/impl/file/local/FileResourceImpl.java	2008-02-27 13:51:42.000000000 +0000
@@ -146,15 +146,19 @@
         }
     }
 
+static Object mkdirlock = new Object();
+
     public void createDirectories(String directory)
             throws FileResourceException {
         if (directory == null || directory.equals("")) {
             return;
         }
         File f = resolve(directory);
+        synchronized(mkdirlock) {
         if (!f.mkdirs() && !f.exists()) {
             throw new FileResourceException("Failed to create directory: " + directory);
         }
+        }
     }
 
     public void deleteDirectory(String dir, boolean force) throws FileResourceException {