I assume you have security switched off.
What issues are you running into?
On Dec 8, 2011, at 1:30 PM, Avery Ching wrote:
> I was able to convert FileContext to FileSystem and related methods fairly
> straightforwardly, but am running into issues of dealing with security
> incompatibilites (i.e. UserGroupInformation, etc.). Yuck.
>
> Avery
>
> On 12/6/11 3:50 PM, Arun C Murthy wrote:
>> Avery,
>>
>> If you could take a look at what it would take, I'd be grateful. I'm hoping
>> it isn't very much effort.
>>
>> thanks,
>> Arun
>>
>> On Dec 6, 2011, at 10:05 AM, Avery Ching wrote:
>>
>>> I think it would be nice if YARN could work on existing older HDFS
>>> instances, a lot of folks will be slow to upgrade HDFS with all their
>>> important data on it. I could also go that route I guess.
>>>
>>> Avery
>>>
>>> On 12/6/11 8:51 AM, Arun C Murthy wrote:
>>>> Avery,
>>>>
>>>> They aren't 'api changes'. HDFS just has a new set of apis in hadoop-0.23
>>>> (aka FileContext apis). Both the old (FileSystem apis) and new are
>>>> supported in hadoop-0.23.
>>>>
>>>> We have used the new HDFS apis in YARN in some places.
>>>>
>>>> hth,
>>>> Arun
>>>>
>>>> On Dec 5, 2011, at 10:59 PM, Avery Ching wrote:
>>>>
>>>>> Thank you for the response, that's what I thought as well =). I spent
>>>>> the day trying to port the required 0.23 APIs to 0.20 HDFS. There have
>>>>> been a lot of API changes!
>>>>>
>>>>> Avery
>>>>>
>>>>> On 12/5/11 9:14 PM, Mahadev Konar wrote:
>>>>>> Avery,
>>>>>> Currently we have only tested 0.23 MRv2 with 0.23 hdfs. I might be
>>>>>> wrong but looking at the HDFS apis' it doesnt look like that it would
>>>>>> be a lot of work to getting it to work with 0.20 apis. We had been
>>>>>> using filecontext api's initially but have transitioned back to the
>>>>>> old API's.
>>>>>>
>>>>>> Hope that helps.
>>>>>>
>>>>>> mahadev
>>>>>>
>>>>>> On Mon, Dec 5, 2011 at 4:01 PM, Avery Ching<ach...@apache.org> wrote:
>>>>>>> Hi,
>>>>>>>
>>>>>>> I've been playing with 0.23.0, really nice stuff! I was able to setup a
>>>>>>> small test cluster (40 nodes) and launch the example jobs. I was also
>>>>>>> able
>>>>>>> to recompile old Hadoop programs with the new jars and start up those
>>>>>>> programs as well. My question is the following:
>>>>>>>
>>>>>>> We have an HDFS instance based on 0.20 that I would like to hook up to
>>>>>>> YARN.
>>>>>>> This appears to be a bit of work. Launching the jobs gives me the
>>>>>>> following error:
>>>>>>>
>>>>>>> 2011-12-05 15:48:05,023 INFO ipc.YarnRPC (YarnRPC.java:create(47)) -
>>>>>>> Creating YarnRPC for org.apache.hadoop.yarn.ipc.HadoopYarnProtoRPC
>>>>>>> 2011-12-05 15:48:05,040 INFO mapred.ResourceMgrDelegate
>>>>>>> (ResourceMgrDelegate.java:<init>(95)) - Connecting to ResourceManager at
>>>>>>> {removed}.{xxx}/{removed}:50177
>>>>>>> 2011-12-05 15:48:05,041 INFO ipc.HadoopYarnRPC
>>>>>>> (HadoopYarnProtoRPC.java:getProxy(48)) - Creating a HadoopYarnProtoRpc
>>>>>>> proxy
>>>>>>> for protocol interface org.apache.hadoop.yarn.api.ClientRMProtocol
>>>>>>> 2011-12-05 15:48:05,121 INFO mapred.ResourceMgrDelegate
>>>>>>> (ResourceMgrDelegate.java:<init>(99)) - Connected to ResourceManager at
>>>>>>> {removed}.{xxx}/{removed}:50177
>>>>>>> 2011-12-05 15:48:05,133 INFO mapreduce.Cluster
>>>>>>> (Cluster.java:initialize(116)) - Failed to use
>>>>>>> org.apache.hadoop.mapred.YarnClientProtocolProvider due to error:
>>>>>>> java.lang.ClassNotFoundException: org.apache.hadoop.fs.Hdfs
>>>>>>> Exception in thread "main" java.io.IOException: Cannot initialize
>>>>>>> Cluster.
>>>>>>> Please check your configuration for mapreduce.framework.name and the
>>>>>>> correspond server addresses.
>>>>>>> at org.apache.hadoop.mapreduce.Cluster.initialize(Cluster.java:123)
>>>>>>> at org.apache.hadoop.mapreduce.Cluster.<init>(Cluster.java:85)
>>>>>>> at org.apache.hadoop.mapreduce.Cluster.<init>(Cluster.java:78)
>>>>>>> at org.apache.hadoop.mapreduce.Job$1.run(Job.java:1129)
>>>>>>> at org.apache.hadoop.mapreduce.Job$1.run(Job.java:1125)
>>>>>>> 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:1152)
>>>>>>> at org.apache.hadoop.mapreduce.Job.connect(Job.java:1124)
>>>>>>> at org.apache.hadoop.mapreduce.Job.submit(Job.java:1153)
>>>>>>> at org.apache.hadoop.mapreduce.Job.waitForCompletion(Job.java:1176)
>>>>>>> at org.apache.giraph.graph.GiraphJob.run(GiraphJob.java:560)
>>>>>>> at
>>>>>>> org.apache.giraph.benchmark.PageRankBenchmark.run(PageRankBenchmark.java:193)
>>>>>>> at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:69)
>>>>>>> at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:83)
>>>>>>> at
>>>>>>> org.apache.giraph.benchmark.PageRankBenchmark.main(PageRankBenchmark.java:201)
>>>>>>> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>>>>>> at
>>>>>>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>>>>>>> at
>>>>>>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>>>>>>> at java.lang.reflect.Method.invoke(Method.java:597)
>>>>>>> at org.apache.hadoop.util.RunJar.main(RunJar.java:189)
>>>>>>>
>>>>>>> After doing a little digging it appears that YarnClientProtocolProvider
>>>>>>> creates a YARNRunner that uses org.apache.hadoop.fs.Hdfs, a class that
>>>>>>> is
>>>>>>> not available available in older versions of HDFS.
>>>>>>>
>>>>>>> What versions of HDFS are currently supported and what HDFS versions are
>>>>>>> planned for support? It would be great to be able to run YARN on legacy
>>>>>>> HDFS installations.
>>>>>>>
>>>>>>> Thanks,
>>>>>>>
>>>>>>> Avery
>
