Hi, Thanks for replying. This is what I did to replicate the problem: 1. First I installed Accumulo 1.6 version in standalone mode using the instructions given at this link: https://github.com/lumifyio/lumify/blob/master/docs/setup-centos-6.5.md In this manner I got my instance of Accumulo up and running. 2. Next I ran a java program to do a basic write operation using the Accumulo manual given here: http://accumulo.apache.org/1.6/accumulo_user_manual.html#_writing_accumulo_clients I ran this java program from two machines firstly on the machine on which the standalone Accumulo was installed and secondly from a machine with no Accumulo. The second machine gave me the above mentioned error. To troubleshoot this error I changed the contents of the masters and slave file from "localhost" to their ip addresses. This solved that error. So I suspect that changing the contents of the masters and slaves file may solve the same problem with my main cluster. Is there a way I can do that..? I also referred to your Accumulo manual given at this link: https://www.google.co.in/url?sa=t&source=web&rct=j&ei=SGVvVKzqHdCLuATAuIH4BA&url=http://www.cloudera.com/content/cloudera/en/documentation/Accumulo/latest/PDF/Apache-Accumulo-Installation-Guide.pdf&ved=0CBoQFjAA&usg=AFQjCNGm8W__Jt30qYGKWVc4jdCpOQmoFQ At page 13 it says that: " On a multi-host cluster, replace localhost with the fully qualified domain name (FQDN) or IP address of the Accumulo Master in the masters, monitor, gc and tracers files in /etc/accumulo/conf, and add the FQDN or IP address of the TabletServers (one per line) to the /etc/accumulo/conf/slaves file." So I want to know us there a way I can achieve this in cloudera manager? Please help. Thanks Vaibhav
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