Certainly looks like HADOOP-6269 to me. Can you try Cloudera's distribution?This patch is included.
-Todd On Wed, Dec 2, 2009 at 4:23 AM, Arv Mistry <a...@kindsight.net> wrote: > Hi, > > I've recently upgraded hadoop to 0.20 and am seeing this concurrent mod > exception on startup which I never got in 0.19. > Is this a known bug in 0.20? I did see this JIRA report, not sure its > related http://issues.apache.org/jira/browse/HADOOP-6269 > > Is there a workaround or should I be getting the FS a different way in > 0.20? > > java.util.ConcurrentModificationException > at java.util.AbstractList$Itr.checkForComodification(Unknown Source) > at java.util.AbstractList$Itr.next(Unknown Source) > at > org.apache.hadoop.conf.Configuration.loadResources(Configuration.java:10 > 28) > at > org.apache.hadoop.conf.Configuration.getProps(Configuration.java:979) > at org.apache.hadoop.conf.Configuration.get(Configuration.java:435) > at > org.apache.hadoop.fs.FileSystem.getDefaultUri(FileSystem.java:103) > at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:95) > at > com.rialto.hadoop.HadoopFileWriter.<init>(HadoopFileWriter.java:66) > > Cheers Arv > > >
