question Re: HDP 2.3.0 Windows Server 2012 R2 Single Node Cluster: 8020 Connection Refused in Archives of Support Questions (Read Only)

HDP 2.3.0 Windows Server 2012 R2 Single Node Cluster: 8020 Connection Refused

aditya_goyal — Mon, 19 Aug 2019 08:15:33 GMT

Hi,

I'm a newbie in this field and trying to setup HDP 2.3.0 single node cluster on a Windows Server 2012 R2 system. I've been following the steps mentioned here: http://docs.hortonworks.com/HDPDocuments/HDP2/HDP-2.3.0-Win/bk_QuickStart_HDPWin/content/ch_qinst.html

However, after successfully installing HDP 2.3.0 as per instructions, I was able to start the services with 2 failures:

After this, I went on to check one of the HDFS commands but the connection was refused:

Does anyone know what I've done wrong in setting up the single node cluster or do I need to do something else for this to work? Please also note that I've disabled the firewall already.

Thanks in advance for helping!

Adi

EDIT: Installing SQL server instead of Derby solved the problem. Thanks to @Artem Ervits.

Re: HDP 2.3.0 Windows Server 2012 R2 Single Node Cluster: 8020 Connection Refused

divakarreddy_a — Mon, 15 Feb 2016 14:30:16 GMT

@Aditya Goyal

Can you run jps in cli and paste the output. it seems some of the hadoop services are not running.

Re: HDP 2.3.0 Windows Server 2012 R2 Single Node Cluster: 8020 Connection Refused

Shelton — Mon, 15 Feb 2016 15:06:28 GMT

@Aditya Goyal

Check that your oozie derby database is up and running and also see link

Re: HDP 2.3.0 Windows Server 2012 R2 Single Node Cluster: 8020 Connection Refused

rahulpathak109 — Mon, 15 Feb 2016 15:25:50 GMT

Error : Connection refused to 8020

Possible causes:

1. NameNode is not running. Check namenode log to find error.

2. Firewall blocking connection to 8020. Check you firewall setting. It is recommended in the doc to disable firewall.

Re: HDP 2.3.0 Windows Server 2012 R2 Single Node Cluster: 8020 Connection Refused

aditya_goyal — Mon, 15 Feb 2016 16:28:04 GMT

@Divakar Annapureddy

Hi Divakar, can you please tell me the specific command you want me to run on the powershell/cmd line ?

Re: HDP 2.3.0 Windows Server 2012 R2 Single Node Cluster: 8020 Connection Refused

aditya_goyal — Mon, 19 Aug 2019 08:15:19 GMT

@Rahul Pathak

1. Please see the below snapshot status of services running:

2. As mentioned before, I had disabled the firewall already.

Re: HDP 2.3.0 Windows Server 2012 R2 Single Node Cluster: 8020 Connection Refused

Shelton — Mon, 15 Feb 2016 19:38:21 GMT

@Aditya Goyal

As reiterated in my earlier posting the reason is the derby database is down.

Start you DB so that Oozie can load it's config also see oozie config

Re: HDP 2.3.0 Windows Server 2012 R2 Single Node Cluster: 8020 Connection Refused

aervits — Mon, 15 Feb 2016 20:06:52 GMT

@Aditya Goyal this seems to be a common problem, can you retry your install with SQL server and not derby. People are having issues with derby on windows.

Re: HDP 2.3.0 Windows Server 2012 R2 Single Node Cluster: 8020 Connection Refused

aditya_goyal — Wed, 17 Feb 2016 11:35:34 GMT

Thanks @Artem Ervits, SQL server solved the problem. 🙂

Re: HDP 2.3.0 Windows Server 2012 R2 Single Node Cluster: 8020 Connection Refused

aditya_goyal — Wed, 17 Feb 2016 11:38:42 GMT

Hi @Geoffrey Shelton Okot, the derby database stops immediately whenever I try to start it.

Re: HDP 2.3.0 Windows Server 2012 R2 Single Node Cluster: 8020 Connection Refused

Shelton — Wed, 17 Feb 2016 14:01:18 GMT

@Aditya Goyal

I would opt to install a MySQL server to resolve the stalemate!

Re: HDP 2.3.0 Windows Server 2012 R2 Single Node Cluster: 8020 Connection Refused

aervits — Wed, 17 Feb 2016 18:29:44 GMT

Please accept the answer @Aditya Goyal