hadoop-common-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Li Li <fancye...@gmail.com>
Subject Re: why copy from localhost.localdomain failed and throw UnknownHostException
Date Wed, 02 Apr 2014 09:25:12 GMT
/etc/hosts
#127.0.0.1              localhost.localdomain localhost
::1             localhost6.localdomain6 localhost6

should localhost.localdomain point to 127.0.0.1?

On Wed, Apr 2, 2014 at 3:55 PM, Gordon Wang <gwang@gopivotal.com> wrote:
> You may want to check the /etc/hosts. The configuration of localhost may not
> right.
> Make sure localhost.localdomain can be resolved.
>
>
> On Wed, Apr 2, 2014 at 2:15 PM, Li Li <fancyerii@gmail.com> wrote:
>>
>> the reducer hangs and the log is:
>>
>> 2014-04-02 14:03:57,235 WARN org.apache.hadoop.mapred.ReduceTask:
>> attempt_201402271518_0260_r_000000_0 copy failed:
>> attempt_201402271518_0260_m_000001_1 from localhost.localdomain
>> 2014-04-02 14:03:57,235 WARN org.apache.hadoop.mapred.ReduceTask:
>> java.net.UnknownHostException: localhost.localdomain
>> at
>> java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:178)
>> at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:391)
>> at java.net.Socket.connect(Socket.java:579)
>> at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
>> at sun.net.www.http.HttpClient.openServer(HttpClient.java:388)
>> at sun.net.www.http.HttpClient.openServer(HttpClient.java:483)
>> at sun.net.www.http.HttpClient.<init>(HttpClient.java:213)
>> at sun.net.www.http.HttpClient.New(HttpClient.java:300)
>> at sun.net.www.http.HttpClient.New(HttpClient.java:316)
>> at
>> sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:992)
>> at
>> sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:928)
>> at
>> sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:846)
>> at
>> org.apache.hadoop.mapred.ReduceTask$ReduceCopier$MapOutputCopier.getInputStream(ReduceTask.java:1636)
>> at
>> org.apache.hadoop.mapred.ReduceTask$ReduceCopier$MapOutputCopier.setupSecureConnection(ReduceTask.java:1593)
>> at
>> org.apache.hadoop.mapred.ReduceTask$ReduceCopier$MapOutputCopier.getMapOutput(ReduceTask.java:1493)
>> at
>> org.apache.hadoop.mapred.ReduceTask$ReduceCopier$MapOutputCopier.copyOutput(ReduceTask.java:1401)
>> at
>> org.apache.hadoop.mapred.ReduceTask$ReduceCopier$MapOutputCopier.run(ReduceTask.java:1333)
>>
>> 2014-04-02 14:03:57,236 INFO org.apache.hadoop.mapred.ReduceTask: Task
>> attempt_201402271518_0260_r_000000_0: Failed fetch #16 from
>> attempt_201402271518_0260_m_000001_1
>> 2014-04-02 14:03:57,236 WARN org.apache.hadoop.mapred.ReduceTask:
>> attempt_201402271518_0260_r_000000_0 adding host localhost.localdomain
>> to penalty box, next contact in 665 seconds
>> 2014-04-02 14:03:57,236 INFO org.apache.hadoop.mapred.ReduceTask:
>> attempt_201402271518_0260_r_000000_0: Got 1 map-outputs from previous
>> failures
>> 2014-04-02 14:04:17,244 INFO org.apache.hadoop.mapred.ReduceTask:
>> attempt_201402271518_0260_r_000000_0 Need another 1 map output(s)
>> where 0 is already in progress
>> 2014-04-02 14:04:17,244 INFO org.apache.hadoop.mapred.ReduceTask:
>> attempt_201402271518_0260_r_000000_0 Scheduled 0 outputs (1 slow hosts
>> and0 dup hosts)
>> 2014-04-02 14:04:17,244 INFO org.apache.hadoop.mapred.ReduceTask:
>> Penalized(slow) Hosts:
>> 2014-04-02 14:04:17,244 INFO org.apache.hadoop.mapred.ReduceTask:
>> localhost.localdomain Will be considered after: 645 seconds.
>> 2014-04-02 14:05:17,269 INFO org.apache.hadoop.mapred.ReduceTask:
>> attempt_201402271518_0260_r_000000_0 Need another 1 map output(s)
>> where 0 is already in progress
>> 2014-04-02 14:05:17,269 INFO org.apache.hadoop.mapred.ReduceTask:
>> attempt_201402271518_0260_r_000000_0 Scheduled 0 outputs (1 slow hosts
>> and0 dup hosts)
>> 2014-04-02 14:05:17,269 INFO org.apache.hadoop.mapred.ReduceTask:
>> Penalized(slow) Hosts:
>> 2014-04-02 14:05:17,269 INFO org.apache.hadoop.mapred.ReduceTask:
>> localhost.localdomain Will be considered after: 585 seconds.
>> 2014-04-02 14:06:17,294 INFO org.apache.hadoop.mapred.ReduceTask:
>> attempt_201402271518_0260_r_000000_0 Need another 1 map output(s)
>> where 0 is already in progress
>> 2014-04-02 14:06:17,295 INFO org.apache.hadoop.mapred.ReduceTask:
>> attempt_201402271518_0260_r_000000_0 Scheduled 0 outputs (1 slow hosts
>> and0 dup hosts)
>> 2014-04-02 14:06:17,295 INFO org.apache.hadoop.mapred.ReduceTask:
>> Penalized(slow) Hosts:
>
>
>
>
> --
> Regards
> Gordon Wang

Mime
View raw message