It is not clear to me that whether Zookeeper is required or optional to Giraph. I wonder if it is possible to run Giraph without Zookeeper. If not the case, would the default Zookeeper work with Giraph? Is there anything has to be changed on Zookeeper.
Another question is that I have the following error message when I ran Giraph on Hadoop-2.0.5 when I ran the PageRankBenchmark program. I saw similar posts on the mailing list, but it seems no clear answer to it yet. I would be grateful if someone can answer my question and resolve the issue. Error: java.lang.IllegalStateException: run: Caught an unrecoverable exception java.io.FileNotFoundException: File _bsp/_defaultZkManagerDir/job_1372108933881_0002/_zkServer does not exist. at org.apache.giraph.graph.GraphMapper.run(GraphMapper.java:102) at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:757) at org.apache.hadoop.mapred.MapTask.run(MapTask.java:339) at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:158) at java.security.AccessController.doPrivileged(Native Method) at javax.security.auth.Subject.doAs(Subject.java:396) at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1478) at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:153) Caused by: java.lang.RuntimeException: java.io.FileNotFoundException: File _bsp/_defaultZkManagerDir/job_1372108933881_0002/_zkServer does not exist. at org.apache.giraph.zk.ZooKeeperManager.onlineZooKeeperServers(ZooKeeperManager.java:790) at org.apache.giraph.graph.GraphTaskManager.startZooKeeperManager(GraphTaskManager.java:357) at org.apache.giraph.graph.GraphTaskManager.setup(GraphTaskManager.java:188) at org.apache.giraph.graph.GraphMapper.setup(GraphMapper.java:60) at org.apache.giraph.graph.GraphMapper.run(GraphMapper.java:90) ... 7 more Caused by: java.io.FileNotFoundException: File _bsp/_defaultZkManagerDir/job_1372108933881_0002/_zkServer does not exist. at org.apache.hadoop.hdfs.DistributedFileSystem.listStatus(DistributedFileSystem.java:405) at org.apache.giraph.zk.ZooKeeperManager.onlineZooKeeperServers(ZooKeeperManager.java:749) ... 11 more Regards, Chuan
