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From Mapred Learn <mapred.le...@gmail.com>
Subject Re: cannot start secure cluster without privileged resources
Date Sat, 24 Mar 2012 01:27:23 GMT
Do you have these ports open amongst the datanodes and name node ?

Sent from my iPhone

On Mar 23, 2012, at 4:04 PM, Eric Schwartz <schwa@csail.mit.edu> wrote:

> Howdy,
> I'm working on getting a kerberized hadoop cluster up and running. I'm using version
1.0.1, as packaged for 64-bit Debian Squeeze. I have the namenode up and have successfully
formatted HDFS. But when I tried to bring up the first datanode, I ran into an error that
I'm having difficulty with, namely:
> 2012-03-23 17:49:55,291 INFO org.apache.hadoop.security.UserGroupInformation: Login successful
for user hdfs/datanode0@REALM using keytab file /etc/hadoop/hdfs.keytab
> 2012-03-23 17:49:55,292 ERROR org.apache.hadoop.hdfs.server.datanode.DataNode: java.lang.RuntimeException:
Cannot start secure cluster without privileged resources.
>        at org.apache.hadoop.hdfs.server.datanode.DataNode.startDataNode(DataNode.java:324)
>        at org.apache.hadoop.hdfs.server.datanode.DataNode.<init>(DataNode.java:299)
>        at org.apache.hadoop.hdfs.server.datanode.DataNode.makeInstance(DataNode.java:1582)
>        at org.apache.hadoop.hdfs.server.datanode.DataNode.instantiateDataNode(DataNode.java:1521)
>        at org.apache.hadoop.hdfs.server.datanode.DataNode.createDataNode(DataNode.java:1539)
>        at org.apache.hadoop.hdfs.server.datanode.DataNode.secureMain(DataNode.java:1665)
>        at org.apache.hadoop.hdfs.server.datanode.DataNode.main(DataNode.java:1682)
> Checking the mailing lists, I found that previously folks encountered trouble with the
privileged ports (http://mail-archives.apache.org/mod_mbox/hadoop-common-user/201108.mbox/%3CCAMs9kVi70RL=6yxuLsCovdD5gYsULfPWJonT2U2pd35duCoH_w@mail.gmail.com%3E)
and with a bug in the /usr/bin/hadoop script. (https://issues.apache.org/jira/browse/HADOOP-8132)
Neither of these seem to be the culprit here, as I'm root when I try to start the datanode
and there's nothing already using ports 1004 and 1006, and the patch already seemed to be
applied to my executable. (I ran it through patch just for good measure and confirmed that
the trouble remained.)
> I've traced the exception stack through the source to little avail (as my Java skills
are limited) and don't particularly relish the prospect of stracing here. That error message
is awfully vague; are there some debugging knobs I can turn up somewhere?
> Thanks in advance for any help. This is my first post here -- please let me know if I've
made a mistake and should have posted this elsewhere.
> Cheers,
> Eric Schwartz

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