Just a hunch, w DNS, do you have your rDNS (reverse DNS lookup) set up correctly.
Sent from a remote device. Please excuse any typos... Mike Segel On Sep 15, 2012, at 8:04 PM, Alberto Cordioli <cordioli.albe...@gmail.com> wrote: > This is the configuration I used till now...It works, but give the > mentioned error (although the procedure seems to return correct > results anyway. > I think in /etc/hosts should be also the line > 127.0.0.1 hostname > > but in that case Hadoop does not start. > > Alberto > > On 14 September 2012 18:19, Shumin Wu <shumin...@gmail.com> wrote: >> Would that work for you? >> >> 127.0.0.1 localhost >> 10.220.55.41 hostname >> >> -Shumin >> >> On Fri, Sep 14, 2012 at 6:18 AM, Alberto Cordioli < >> cordioli.albe...@gmail.com> wrote: >> >>> Hi, >>> >>> I've successfully installed Apache HBase on a cluster with Hadoop. >>> It works fine, but when I try to use Pig to load some data from an >>> HBase table I get this error: >>> >>> ERROR org.apache.hadoop.hbase.mapreduce.TableInputFormatBase - Cannot >>> resolve the host name for /10.220.55.41 because of >>> javax.naming.OperationNotSupportedException: DNS service refused >>> [response code 5]; remaining name '41.55.220.10.in-addr.arpa' >>> >>> Pig returns in any case the correct results (actually I don't know >>> how), but I'd like to solve this issue. >>> >>> I discovered that this error is due to a mistake in /etc/hosts >>> configuration file. In fact, as reported in the documentation, I >>> should add the line >>> 127.0.0.1 hostname >>> (http://hbase.apache.org/book.html#os). >>> >>> But if I add this entry my Hadoop cluster does not start since the >>> datanote is bind to the local address instead to the hostname/IP >>> address. For this reason in many tutorial it's suggested to remove >>> such entry (e.g. >>> >>> http://stackoverflow.com/questions/8872807/hadoop-datanodes-cannot-find-namenode >>> ). >>> >>> Basically if I add that line Hadoop won't work, but if I keep the file >>> without the loopback address I get the above error. >>> What can I do? Which is the right configuration? >>> >>> >>> Thanks, >>> Alberto >>> >>> >>> >>> >>> -- >>> Alberto Cordioli >>> > > > > -- > Alberto Cordioli >
