Eric-
The link you sent is directly relevant, but unfortunately it didn't resolve it.
I already had the following property set
<property>
<name>dfs.client.failover.proxy.provider.mycluster</name>
<value>org.apache.hadoop.hdfs.server.namenode.ha.ConfiguredFailoverProxyProvider</value>
</property>
The discussion at the link that you sent was in a CDH forum and it looked like
HA resulted in some required changes for the hdfs command to be able to resolve
the active NameNode. That leads me to two questions:
1) Does Accumulo know how to resolve the active NameNode?
2) If it doesn't, is there a way to explicitly specify it like the user
did for the hdfs command as a work-around?
Josh
From: Eric Newton [mailto:[email protected]]
Sent: Tuesday, September 03, 2013 12:24 PM
To: [email protected]
Subject: Re: Accumulo with NameNode HA: UnknownHostException for
dfs.nameservices
This discussion seems to provide some insight:
https://groups.google.com/a/cloudera.org/forum/#!topic/cdh-user/I_OmKdZOjVE
Please let us know if you get it working; I would like to test this for the
1.6.0 release.
-Eric
On Tue, Sep 3, 2013 at 12:06 PM, Smith, Joshua D.
<[email protected]<mailto:[email protected]>> wrote:
All-
I'm installing Accumulo 1.5 on CDH 4.3. I'm running Hadoop 2.0 (yarn) with High
Availability (HA) for the NameNode. When I try to initialize Accumulo I get the
following error message:
>sudo -u accumulo accumulo init
FATAL: java.lang.IllegalArgumentException: java.net.UnknownHostException:
mycluster
java.lang.IllegalArgumentException: java.net.UnknownHostException: mycluster
at
org.apache.hadoop.security.SecurityUtil.buildTokenService(SecurityUtil.java:414)
at
org.apache.hadoop.hdfs.NameNodeProxies.createNonHAProxy(NameNodeProzies.java:164)
at org.apache.hadoop.hdfs.NameNodeProxies.createProxy(NameNodeProxies.java:129)
at org.apache.hadoop.hdfs.DFSClient.<init>(DFSClient.java:448)
at org.apache.hadoop.hdfs.DFSClient.<init>(DFSClient.java:410)
at
org.apache.hadoop.hdfs.DistributedFileSystem.initialize(DistributedFileSystem.java:128)
at org.apache.hadoop.fs.FileSystem.createFileSystem(FileSystem.java:2308)
at org.apache.hadoop.fs.FileSystem.access$200(FileSystem.java:87)
at org.apache.hadoop.fs.FileSystem$Cache.getInternal(FileSystem.java:2324)
at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:351)
at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:163)
at org.apache.accumulo.core.file.FileUtil.getFileSystem(FileUtil.java:550)
at org.apache.accumulo.server.util.Initialize.main(Initialize.java:485)
...
"mycluster" is from my hdfs-site.xml and is part of the HA configuration
<property>
<name>dfs.nameservices</name>
<value>mycluster</value>
</property>
It's not a hostname and I'm not sure why Accumulo would try to resolve it as if
it was a hostname.
Any idea why I would get this error or why Accumulo would have trouble running
on Hadoop 2.0 with HA?
Thanks,
Josh
