I managed to get around this problem. The Hadoop instance is a single node development cluster and all of the hostnames references in the Hadoop configuration files are set to "localhost". "GiraphConfiguration.getLocalHostname()" was retrieving the hostname set via the "hostname" command, which was mapped to the actual IP address of the machine rather than 127.0.0.1. I commented out the IP address line and added the hostname to the 127.0.0.1 line in "/etc/hosts". This solved up the problem. In a non-development cluster this wouldn't be a problem.
Larry On Wed, Jul 2, 2014 at 4:12 PM, Larry Compton <lawrence.comp...@gmail.com> wrote: > I've recently upgraded my Hadoop instance from 0.20.2 to 2.3.0. I've > verified that M/R jobs work correctly on the instance and am in the process > of verifying that the instance is capable of executing Giraph jobs > successfully. I'm currently trying to run the > SimpleShortestPathsComputation from the examples and have encountered an > error. Here's an excerpt from the log... > > ERROR [org.apache.hadoop.yarn.client.api.async.impl.NMClientAsyncImpl #0] > yarn.GiraphApplicationMaster > (GiraphApplicationMaster.java:onStartContainerError(688)) - Failed to start > Container container_... > java.net.UnknownHostException: Invalid host name: local host is: > (unknown)... > > The command I'm using to execute the job is... > > $HADOOP_HOME/bin/hadoop jar $GIRAPH_COMPLETE_JAR \ > org.apache.giraph.GiraphRunner \ > org.apache.giraph.examples.SimpleShortestPathsComputation \ > -vif > org.apache.giraph.io.formats.JsonLongDoubleFloatDoubleVertexInputFormat \ > -vip tiny.txt \ > -vof org.apache.giraph.io.formats.IdWithValueTextOutputFormat \ > -op shortest-paths \ > -w 1 \ > -yj $GIRAPH_COMPLETE_JAR > > I'm guessing that something isn't configured correctly in my Hadoop > instance or I'm missing a parameter in the execution of the job. Note that > I have also tried tacking on the following additional parameters and I > still see the error... > > -ca giraph.zkList=localhost:2181 > -ca giraph.SplitMasterWorker=true > -ca mapred.job.tracker=54311 > -ca mapreduce.job.tracker=54311 > > Any idea what might be wrong? > > Larry >
