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From Chuan Lei <leich...@gmail.com>
Subject Re: Is Zookeeper a must for Giraph?
Date Tue, 25 Jun 2013 23:00:21 GMT
Hi Avery,

Thanks for your quick answer. Just for your information. I was able to fix
the second issue (running pagerank example). I believe it has been
addressed in GIRAPH-442 (https://issues.apache.org/jira/browse/GIRAPH-442).
What confuses me is that I don't know why this patch is not applied to the
latest release (1.0.0).

Again, I appreciate your help.

Best,
Chuan



On Mon, Jun 24, 2013 at 10:17 PM, Avery Ching <aching@apache.org> wrote:

> Zookeeper is required.  That being said, you can have an external
> Zookeeper or Giraph can start one for you.  It's your choice.
>
> Eli is the one to contact regarding Giraph on Hadoop 2.0.5.  Any thoughts
> Eli?
>
> Avery
>
>
> On 6/24/13 5:22 PM, Chuan Lei wrote:
>
>> 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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