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From Daniel Watrous <dwmaill...@gmail.com>
Subject Re: Problem running example (wrong IP address)
Date Fri, 25 Sep 2015 16:16:55 GMT
Brahma,

Thanks for the reply. I'll keep this conversation here in the user list.
The /etc/hosts file is identical on all three nodes

hadoop@hadoop-data1:~$ cat /etc/hosts
127.0.0.1 localhost
192.168.51.4 hadoop-master
192.168.52.4 hadoop-data1
192.168.52.6 hadoop-data2

hadoop@hadoop-data2:~$ cat /etc/hosts
127.0.0.1 localhost
192.168.51.4 hadoop-master
192.168.52.4 hadoop-data1
192.168.52.6 hadoop-data2

hadoop@hadoop-master:~$ cat /etc/hosts
127.0.0.1 localhost
192.168.51.4 hadoop-master
192.168.52.4 hadoop-data1
192.168.52.6 hadoop-data2

Here are the startup logs for all three nodes:
https://gist.github.com/dwatrous/7241bb804a9be8f9303f
https://gist.github.com/dwatrous/bcd85cda23d6eca3a68b
https://gist.github.com/dwatrous/922c4f773aded0137fa3

Thanks for your help.


On Fri, Sep 25, 2015 at 10:33 AM, Brahma Reddy Battula <
brahmareddy.battula@huawei.com> wrote:

> Seems DN started in three machines and failed in
> hadoop-data1(192.168.52.4)..
>
>
> 192.168.51.6 : giving IP as 192.168.51.1 <http://192.168.51.1:50010>...can
> you please check /etc/hosts file of 192.168.51.6 (might be 192.168.51.1
> <http://192.168.51.1:50010> is configured in /etc/hosts)
>
> 192.168.52.4 : datanode startup might be failed ( you can check this node
> logs)
>
> 192.168.51.4 :  <http://192.168.51.4:50010> Datanode starup is
> success..which is in master node..
>
>
>
> Thanks & Regards
>
>  Brahma Reddy Battula
>
>
>
>
> ------------------------------
> *From:* Daniel Watrous [dwmaillist@gmail.com]
> *Sent:* Friday, September 25, 2015 8:41 PM
> *To:* user@hadoop.apache.org
> *Subject:* Re: Problem running example (wrong IP address)
>
> I'm still stuck on this and posted it to stackoverflow:
>
> http://stackoverflow.com/questions/32785256/hadoop-datanode-binds-wrong-ip-address
>
> Thanks,
> Daniel
>
> On Fri, Sep 25, 2015 at 8:28 AM, Daniel Watrous <dwmaillist@gmail.com>
> wrote:
>
>> I could really use some help here. As you can see from the output below,
>> the two attached datanodes are identified with a non-existent IP address.
>> Can someone tell me how that gets selected or how to explicitly set it.
>> Also, why are both datanodes shown under the same name/IP?
>>
>> hadoop@hadoop-master:~$ hdfs dfsadmin -report
>> Configured Capacity: 84482326528 (78.68 GB)
>> Present Capacity: 75745546240 (70.54 GB)
>> DFS Remaining: 75744862208 (70.54 GB)
>> DFS Used: 684032 (668 KB)
>> DFS Used%: 0.00%
>> Under replicated blocks: 0
>> Blocks with corrupt replicas: 0
>> Missing blocks: 0
>> Missing blocks (with replication factor 1): 0
>>
>> -------------------------------------------------
>> Live datanodes (2):
>>
>> Name: 192.168.51.1:50010 (192.168.51.1)
>> Hostname: hadoop-data1
>> Decommission Status : Normal
>> Configured Capacity: 42241163264 (39.34 GB)
>> DFS Used: 303104 (296 KB)
>> Non DFS Used: 4302479360 (4.01 GB)
>> DFS Remaining: 37938380800 (35.33 GB)
>> DFS Used%: 0.00%
>> DFS Remaining%: 89.81%
>> Configured Cache Capacity: 0 (0 B)
>> Cache Used: 0 (0 B)
>> Cache Remaining: 0 (0 B)
>> Cache Used%: 100.00%
>> Cache Remaining%: 0.00%
>> Xceivers: 1
>> Last contact: Fri Sep 25 13:25:37 UTC 2015
>>
>>
>> Name: 192.168.51.4:50010 (hadoop-master)
>> Hostname: hadoop-master
>> Decommission Status : Normal
>> Configured Capacity: 42241163264 (39.34 GB)
>> DFS Used: 380928 (372 KB)
>> Non DFS Used: 4434300928 (4.13 GB)
>> DFS Remaining: 37806481408 (35.21 GB)
>> DFS Used%: 0.00%
>> DFS Remaining%: 89.50%
>> Configured Cache Capacity: 0 (0 B)
>> Cache Used: 0 (0 B)
>> Cache Remaining: 0 (0 B)
>> Cache Used%: 100.00%
>> Cache Remaining%: 0.00%
>> Xceivers: 1
>> Last contact: Fri Sep 25 13:25:38 UTC 2015
>>
>>
>>
>> On Thu, Sep 24, 2015 at 5:05 PM, Daniel Watrous <dwmaillist@gmail.com>
>> wrote:
>>
>>> The IP address is clearly wrong, but I'm not sure how it gets set. Can
>>> someone tell me how to configure it to choose a valid IP address?
>>>
>>> On Thu, Sep 24, 2015 at 3:26 PM, Daniel Watrous <dwmaillist@gmail.com>
>>> wrote:
>>>
>>>> I just noticed that both datanodes appear to have chosen that IP
>>>> address and bound that port for HDFS communication.
>>>>
>>>> http://screencast.com/t/OQNbrWFF
>>>>
>>>> Any idea why this would be? Is there some way to specify which
>>>> IP/hostname should be used for that?
>>>>
>>>> On Thu, Sep 24, 2015 at 3:11 PM, Daniel Watrous <dwmaillist@gmail.com>
>>>> wrote:
>>>>
>>>>> When I try to run a map reduce example, I get the following error:
>>>>>
>>>>> hadoop@hadoop-master:~$ hadoop jar
>>>>> /usr/local/hadoop/share/hadoop/mapreduce/hadoop-mapreduce-examples-2.7.1.jar
>>>>> pi 10 30
>>>>> Number of Maps  = 10
>>>>> Samples per Map = 30
>>>>> 15/09/24 20:04:28 INFO hdfs.DFSClient: Exception in
>>>>> createBlockOutputStream
>>>>> java.io.IOException: Got error, status message , ack with firstBadLink
>>>>> as 192.168.51.1:50010
>>>>>         at
>>>>> org.apache.hadoop.hdfs.protocol.datatransfer.DataTransferProtoUtil.checkBlockOpStatus(DataTransferProtoUtil.java:140)
>>>>>         at
>>>>> org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.createBlockOutputStream(DFSOutputStream.java:1334)
>>>>>         at
>>>>> org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.nextBlockOutputStream(DFSOutputStream.java:1237)
>>>>>         at
>>>>> org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:449)
>>>>> 15/09/24 20:04:28 INFO hdfs.DFSClient: Abandoning
>>>>> BP-852923283-127.0.1.1-1443119668806:blk_1073741825_1001
>>>>> 15/09/24 20:04:28 INFO hdfs.DFSClient: Excluding datanode
>>>>> DatanodeInfoWithStorage[192.168.51.1:50010
>>>>> ,DS-45f6e06d-752e-41e8-ac25-ca88bce80d00,DISK]
>>>>> 15/09/24 20:04:28 WARN hdfs.DFSClient: Slow waitForAckedSeqno took
>>>>> 65357ms (threshold=30000ms)
>>>>> Wrote input for Map #0
>>>>>
>>>>> I'm not sure why it's trying to access 192.168.51.1:50010, which
>>>>> isn't even a valid IP address in my setup.
>>>>>
>>>>> Daniel
>>>>>
>>>>
>>>>
>>>
>>
>

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