I just committed HDFS-2923 to branch-0.23. This bug can cause big performance issues on the NN since the number of IPC handlers will default way too low and won't be changed with the expected config.
Since there's a workaround, it's not a regression since 0.23.0, and 0.23.1 is still going to be labeled alpha/beta, it's up to you whether you want to spin an rc1 on account of just this bug. If there are other issues, though, definitely worth including this in rc1. -Todd On Wed, Feb 8, 2012 at 1:33 AM, Arun C Murthy <[email protected]> wrote: > I've created a release candidate for hadoop-0.23.1 that I would like to > release. > > It is available at: http://people.apache.org/~acmurthy/hadoop-0.23.1-rc0/ > > Some highlights: > # Since hadoop-0.23.0 in November there has been significant progress in > branch-0.23 with nearly 400 jiras committed to it (68 in Common, 78 in HDFS > and 242 in MapReduce). > # An important aspect is that we've done a lot of performance related work > and hadoop-0.23.1 matches or exceeds performance of hadoop-1 in pretty much > every aspect of HDFS & MapReduce. > # Also, several downstream projects (HBase, Pig, Oozie, Hive etc.) seem to > be playing nicely with hadoop-0.23.1. > > Please try the release and vote; the vote will run for the usual 7 days. > > thanks, > Arun > > -- > Arun C. Murthy > Hortonworks Inc. > http://hortonworks.com/ > > -- Todd Lipcon Software Engineer, Cloudera
