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From Josh Elser <>
Subject Re: accumulo 1.6 and HDFS non-HA conversion to HDFS HA
Date Tue, 05 Aug 2014 17:14:50 GMT
I think I did this once, but it was a while back (around when Hadoop 
2.2.0 came out).

Some gotchas that I remember:

* Make sure that HADOOP_CONF_DIR is set appropriately and added to the 
Accumulo classpath (HADOOP_CONF_DIR test&set in and 
general.classpaths in accumulo-site.xml).

* Make sure that you use the nameservice URI (instead of a single 
namenode URI) in instance.volumes or instance.dfs.uri (whichever you 
chose to use to configure in accumulo-site.xml.

On 8/5/14, 1:06 PM, craig w wrote:
> I've setup an Accumulo 1.6 cluster with Hadoop 2.4.0 (with a secondary
> namenode). I wanted to convert the secondary namenode to be a standby
> (hence HDFS HA).
> After getting HDFS HA up and making sure the hadoop configuration files
> were accessible by Accumulo, I started up Accumulo. I noticed some
> reports of tablet servers failing to connect, however, they were failing
> to connect to HDFS over port 9000. That port is not configured/used with
> HDFS HA so I'm unsure why they are still trying to talk to HDFS using
> the old configuration.
> Any thoughts ideas? I know Accumulo 1.6 works with HDFS HA, but I'm
> curious if the tests have ever been run against a non-HA cluster that
> was converted to HA (with data in it).
> --

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