Thank you for the reply Sonja, I am following the quick start guide in the Apache Giraph website so I'm working in a single-node, pseudo-distributed cluster.
I have no idea why there are 2 map tasks, my configuration is the following: <property> <name>mapred.job.tracker</name> <value>hdnode01:54311</value> </property> <property> <name>mapred.tasktracker.map.tasks.maximum</name> <value>4</value> </property> <property> <name>mapred.map.tasks</name> <value>4</value> </property> There is an exception in the tasklog with the error I posted in my previous e-mail: Task attempt_201507131607_0013_m_000000_0 failed to report status for 600 seconds. Killing! However, I should also say that I managed to execute the example a little earlier by additionally providing the -masterCompute argument (-mc org.apache.giraph.examples.SimplePageRankComputation\$SimplePageRankMasterCompute) I wonder if this is a prerequisite for the SimplePageRankComputation and why it is not the case with SimpleShortestPathsComputation. Does anyone have any idea on that? Thank you, Panagiotis > Hi there! > > I'm guessing you're working in a pseudo-distributed mode, since you > applied the argument -w 1 > Have you taken a look into the tasklog? Sounds like you might have some > excpetion and/or connection loss. > > Also I am wondering why your computation launched 2 map tasks. > What is your configuration in mapred-site.xml? > > Greetings! > Sonja >
