question Re: http://localhost:50070/ is not working . in Archives of Support Questions (Read Only)

http://localhost:50070/ is not working .

Balakumar90 — Fri, 16 Sep 2022 09:01:17 GMT

Hello ,

I installed HDFS using Cloudera Manager 5 . Then i tried to browse http://localhost:50070/ it was not working .

I tried running iptables -A INPUT -p tcp --dport 50070 -j ACCEPT still its not working.

Please help .

Thanks

Bala

Re: http://localhost:50070/ is not working .

busbey — Thu, 26 Jun 2014 15:28:28 GMT

Does the CM page for the HDFS service report everything as healthy?

Can you try browsing to the NameNode UI via the link provided on the CM page for the HDFS service?

Re: http://localhost:50070/ is not working .

Balakumar90 — Thu, 26 Jun 2014 15:41:52 GMT

Hello ,

No , Its in Concerned state.

(Red Color) 331 under replicated blocks in the cluster. 331 total blocks in the cluster. Percentage under replicated blocks: 100.00%. Critical threshold: 40.00%.

2 concerning.

Details NameNode summary: inbasdlp00958.mahindrasatyam.ad (Availability: Active, Health: Concerning). This health test reflects the health of the active NameNode.
Details Healthy DataNode: 0. Concerning DataNode: 1. Total DataNode: 1. Percent healthy: 0.00%. Percent healthy or concerning: 100.00%. Warning threshold: 95.00%.

and Where to find the link on CM page ??

Re: http://localhost:50070/ is not working .

busbey — Thu, 26 Jun 2014 15:51:18 GMT

Which version of CM are you using?

In general, the link is on the HDFS service page on the top line and in the "HDFS Summary" section.

On CM 5.0.2 the latter is right under the "configured capacity" display and is labeled "namenode web ui."

Circled in red:

Re: http://localhost:50070/ is not working .

Balakumar90 — Thu, 26 Jun 2014 16:09:28 GMT

Sorry , I didnt notice it properly . I clicked the link . I see this

" Network Access Message: The page cannot be displayed "

Re: http://localhost:50070/ is not working .

busbey — Thu, 26 Jun 2014 16:28:14 GMT

- Can you verify that DNS works from your workstation to resolve the host that is running the namenode you're trying to look at?

- The message sounds like a firewall issue. Are you sure there isn't a firewall between you and the namenode machine preventing access?

One way to zero in on the problem is to copy the namenode ui link from CM adn then check it from the machine running the namenode to rule out network interference.

For example, if the namenode UI link is http://namenode1.example.com:50070/

[root@namenode1 ~]# curl http://namenode1.example.com:50070/
<meta HTTP-EQUIV="REFRESH" content="0;url=dfshealth.jsp"/>
<html>
<!--
   Licensed to the Apache Software Foundation (ASF) under one or more
   contributor license agreements.  See the NOTICE file distributed with
   this work for additional information regarding copyright ownership.
   The ASF licenses this file to You under the Apache License, Version 2.0
   (the "License"); you may not use this file except in compliance with
   the License.  You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
-->
<head>
<title>Hadoop Administration</title>
</head>

<body>

<h1>Hadoop Administration</h1>

<ul>

<li><a href="dfshealth.jsp">DFS Health/Status</a></li>

</ul>

</body>

</html>
[root@namenode1 ~]#

Re: http://localhost:50070/ is not working .

Balakumar90 — Thu, 26 Jun 2014 16:31:53 GMT

Actually , I have installed Cloudera Manager in a Single system . There are no other hosts connected to it and I have disabled the Firewall too .

Re: http://localhost:50070/ is not working .

busbey — Thu, 26 Jun 2014 16:33:43 GMT

is the single system your local workstation? is it a VM?

check via curl to rule out your browser.

recheck that DNS resolution works for hte hostname CM thinks the node should be.

Re: http://localhost:50070/ is not working .

Balakumar90 — Thu, 26 Jun 2014 16:43:19 GMT

1. This is a Single system .

2. When I run using Curl , I got the below output
[user1@ip00958 ~]$ curl http://ip00958.mycomp.ad:50070/

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="REFRESH" content="1;url=dfshealth.jsp" />
<title>Hadoop Administration</title>
</head>
<body>
<script type="text/javascript">
//<![CDATA[
window.location.href='dfshealth.html';
//]]>
</script>
<h1>Hadoop Administration</h1>
<ul>
<li><a href="dfshealth.jsp">DFS Health/Status</a></li>
</ul>
</body>
</html>

3. I dont know how to check DNS resolution . Currenly hostname is ip00958.mycomp.ad

Re: http://localhost:50070/ is not working .

busbey — Thu, 26 Jun 2014 16:48:27 GMT

Curl works, so that's good news. DNS at least works at teh OS level.

The current problem appears to be with your web browser then. What browser is it? Do you know if it's running any kind of filtering add on?

Re: http://localhost:50070/ is not working .

Balakumar90 — Thu, 26 Jun 2014 16:49:58 GMT

Its Firefox 10.0.12 .2 . There are no add ons .. Is there any settings i need to set .???

Re: http://localhost:50070/ is not working .

busbey — Thu, 26 Jun 2014 16:58:40 GMT

Nope, no setting. It should *just work*. Something is amiss with your browser, just not sure what.

Is this a machine you control yourself or is it managed by an IT group?

Can you try copy/pasting the link into your browser address bar instead of clicking on it?

Is there another web browser on the machine you could attemp to use?

(It's worth noting that hte CM5 requirements state the minimum Firefox version is 11, but that shouldn't impact the NameNode UI page and this doesn't feel like a browser compatibility issue.)

Re: http://localhost:50070/ is not working .

Balakumar90 — Thu, 26 Jun 2014 17:02:09 GMT

I tried .. 😞 .. dodnt work ..... and this machine is under control of IT team .

Re: http://localhost:50070/ is not working .

busbey — Thu, 26 Jun 2014 17:03:31 GMT

Additional browser perhaps?

Re: http://localhost:50070/ is not working .

kevin — Thu, 26 Jun 2014 17:05:55 GMT

Under your browser settings I would make sure you don't have any proxy information setup there.

Re: http://localhost:50070/ is not working .

Balakumar90 — Fri, 27 Jun 2014 07:21:45 GMT

Kevin , I do have a proxy settings . When i disabled that i am able to browse the name node UI . Is there any possibility of using the both .