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From Daniel Watrous <dwmaill...@gmail.com>
Subject Re: Problem running example (wrong IP address)
Date Fri, 25 Sep 2015 13:28:23 GMT
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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