Apache Ambari : Datanode installation failed while installing in existing cluster - apache

Question

I have created hadoop cluster using apache ambari 2.1.0 with 3 datanodes.
Now when i am trying to add another datanode into(existing cluster) it, it throws an error that
resource_management.core.exceptions.Fail: Execution of '/usr/bin/yum
-d 0 -e 0 -y install 'hadoop_2_3_*'' returned 1. No Presto metadata available for base
Delta RPMs reduced 3.6 M of updates to 798 k (78% saved)
Here is my web UI console log:
Traceback (most recent call last):
File "/var/lib/ambari-agent/cache/common-services/HDFS/2.1.0.2.0/package/scripts/datanode.py", line 153, in
DataNode().execute()
File "/usr/lib/python2.6/site-packages/resource_management/libraries/script/script.py", line 218, in execute
method(env)
File "/var/lib/ambari-agent/cache/common-services/HDFS/2.1.0.2.0/package/scripts/datanode.py", line 34, in install
self.install_packages(env, params.exclude_packages)
File "/usr/lib/python2.6/site-packages/resource_management/libraries/script/script.py", line 376, in install_packages
Package(name)
File "/usr/lib/python2.6/site-packages/resource_management/core/base.py", line 157, in init
self.env.run()
File "/usr/lib/python2.6/site-packages/resource_management/core/environment.py", line 152, in run
self.run_action(resource, action)
File "/usr/lib/python2.6/site-packages/resource_management/core/environment.py", line 118, in run_action
provider_action()
File "/usr/lib/python2.6/site-packages/resource_management/core/providers/package/init.py", line 45, in action_install
self.install_package(package_name, self.resource.use_repos, self.resource.skip_repos)
File "/usr/lib/python2.6/site-packages/resource_management/core/providers/package/yumrpm.py", line 49, in install_package
shell.checked_call(cmd, sudo=True, logoutput=self.get_logoutput())
File "/usr/lib/python2.6/site-packages/resource_management/core/shell.py", line 70, in inner
result = function(command, **kwargs)
File "/usr/lib/python2.6/site-packages/resource_management/core/shell.py", line 92, in checked_call
tries=tries, try_sleep=try_sleep)
File "/usr/lib/python2.6/site-packages/resource_management/core/shell.py", line 140, in _call_wrapper
result = _call(command, **kwargs_copy)
File "/usr/lib/python2.6/site-packages/resource_management/core/shell.py", line 291, in _call
raise Fail(err_msg)
resource_management.core.exceptions.Fail: Execution of '/usr/bin/yum
-d 0 -e 0 -y install 'hadoop_2_3_*'' returned 1. No Presto metadata available for base Delta RPMs reduced 3.6 M of updates to 798 k (78%
saved)
Error downloading packages:
hadoop_2_3_4_0_3485-yarn-proxyserver-2.7.1.2.3.4.0-3485.el6.x86_64:
[Errno 256] No more mirrors to try.

Answer 1

This looks like there are two issues with yum and your repositories.
First I see the message:
No Presto metadata available for base Delta RPMs reduced 3.6 M of
updates to 798 k (78% saved)
Try running the following command on the host that you are trying to add as a datanode to fix the first issue:
sudo yum clean all
Then see if you can perform this command successfully:
sudo yum -v install hadoop_2_3_*
If you get to the prompt that asks if you want to install (y/n) then it was successful, choose the no option, and retry the add datanode action from Ambari. If you get an error or some failure take a look at the verbose output to troubleshoot the problem further.