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From Chuan Lei <leich...@gmail.com>
Subject Is Zookeeper a must for Giraph?
Date Tue, 25 Jun 2013 00:22:32 GMT
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

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