I am new to Hadoop. Oracle VM with Hortonworks sandbox (OS Red Hat 64bit) with HDP 2.3.2 is up and running. When i am trying to test via http://192.168.56.101 i get the 502 proxy error.
Proxy Error
The proxy server received an invalid response from an upstream server.
The proxy server could not handle the request GET /.
Reason: Error reading from remote server
I have done the same installation and configuration on both my pc and mac and i get the same error. I have tried the test from IE and chrome as well.
I also got same issue when I try it in another browser it worked, so you can try in different browser. And also increase your VMware allocated memory for hortonworks VM.
Click on machine tab of Horton sandbox virtual box running instance and click Reset. It worked for me.
Usually it happens when the Ambari is restarting or shutting down. Just wait for a few seconds and it should resolve.
You can also try to open it in incognito mode or clear the cookies.
To clear the cookies, for the chrome browser:
Click on i icon which is at the left side of URL
Click on Cookies
Remove all cookies one-by-one
It should solve.
Related
I'm new to rabbitmq and just installed two version of rabbitmq on two different devices.
the machines are located in the same network.
I am trying to open management console of one of them through the other one.
but the page does not open.
although i have already enabled the console plugin and i can access it from localhost.
what should I do to solve this problem?
If you are not able to see the login page with the user and password prompt, check your firewall (port 15672). If you see the page but cannot login, the issue is that by default, the guest user can only connect from localhost
Referring to below link Installed Hortonworks Sandbox on Oracle VM Virtual box.
https://hortonworks.com/tutorial/learning-the-ropes-of-the-hortonworks-sandbox
After starting the VM , Connected to host IP on port 2222 using Putty as user root. Changed Admin password successfully. Checked the status of Ambari Server and found in started state.
loaded the Splash page successfully on the URL http://sandbox-hdp.hortonworks.com:8888
Now While loading Dashboard on URL http://sandbox-hdp.hortonworks.com:8080/main/dashboard/metrics , Authorization popup not accepting Any of the UserId/Password combinations provided on HortornWorks website(link provided earlier)
I tried with admin/"My Password" and maria_dev/maria_dev and raj_ops/raj_ops. Authorization getting failed for every set of userid/pwd.
I have checked the port forwarding is enabled for port 8080 on VM Machine. Any further pointers appreciated.
Installed on VMWare instead of VirtualBox and It worked. Was able to launch and login to Ambari.
I am new to Mesos and just finished setting up mesos and along with zookeeper on my test server.
Unfortunately I keep getting this error message on my mesos console indicating i am unable to connect to mesos on port 5050 and can't seem to figure out why.
I have included the error in the screen shot below
The mesos log files doesn't point to why the error is showing either.
I resolved the problem by this:
./bin/mesos-master.sh --ip=x.x.x.x --work_dir=/var/lib/mesos --hostname=x.x.x.x
We can avoid this problem by starting mesos-master with following option:
--ip=xx.xx.xx.xx --hostname_lookup=false
I have resolved this problem. Open the web page in Chrome, and open the developer tool, you will see the chrome is accessing the web site with domain, in my case the domain name is "mesosphere", as there is no mesosphere in dns, so the accessing was failed.
I solved the problem by adding the mesosphere in the hosts file, C:/windows/system32/etc/hosts/
If you use the domain name for the Mesos cluster you must set the domain name in windows hosts.
There can be multiple issues here.
Is your mesos-master running and healthy ?
Has leader election process completed, if all is good.
Check if you are able to do
ping leader.mesos
If above ping doesn't work, that means leader has not been elected. First fix that.
I had this problem also. Luckily, I have a running mesos server also. So, I can compare the different between my demo and the running mesos server. I captured the packets between client and server in my demo. I found the explorer didn`t resend fresh request, only some keepalive packets.
but, when I catch the packets in the running mesos server, I found the explorer send get request frequently. like the image
I think, if you run some task or add some agent, maybe it will activate the explore to send request frequently. Then the "Failed to connect" will disappeared.
I was having the same issues and what fixed it for me was the zookeeper configuration. In my case I was using the EC2 public IP Address rather than the private one. Once I changed the /etc/mesos/zk file to zk://<private IP>:2181/mesos I was able to connect without the constant error messages. In other words, zookeeper was reporting to be running in one IP and mesos-master was trying to connect using a different IP.
My configuration was correct as suggested. But failed to start mesos-master service. But There is alternative way to start mesos-master node with exact same configuration. Commands to start mesos-master
$ cd /usr/sbin [or mesos_installation directory/bin]
$sudo ./mesos-master --work_dir=/var/lib/mesos --log_dir=/home/rajeev/logs/mesos/
Its start mesos-master service successfully for me.
I'm trying to setup an Apache server on an Ubuntu EC2 instance. I'm using 12.04 LTS, and I've tried with 14.04 LTS, but haven't reached a solution. I've scoured the internet looking for a solution but haven't found anything. My Apache settings are default and I've created a Security Group for HTTP. I also have an elastic IP associated with the instance.
When I load localhost using Lynx, I'm getting the Apache page. I cannot access it from my browser externally. The page keeps trying to connect and is waiting for it. When I nmap port 80 internally from the server, it says open. The weird thing is when I try to nmap the server from outside. It sometimes shows it's open and sometimes it shows it's down. I cannot determine the situation that causes this. It seems arbitrary to me at the moment. I've tried to launch different instances and I'm getting the same behavior. I've turned off ufw, and cleared iptables.
I am able to SSH and FTP to the server without any problems. I'm stumped, and very confused why something so simple can not work. Apache error logs are normal. I also tried with nginx and I'm getting the same problem.
Any help is appreciated!
I have recently switched from mac development environment to windows development environment. I was used Chrles proxy extensively to capture network traffic, requests and response details. Right now I have installed Charles proxy version 3.7 in windows 8. How ever I have observed that the website on which I am working is not opening at all with Charles proxy ON. It is showing below exception message. And it is working perfectly for all other websites.
Charles Error Report
Failed to connect to remote host
Charles failed to connect to the remote host. Check that your Internet
connection is ok and that the remote host is accessible. Maybe your
network uses a proxy server to access the Internet? You can configure
Charles to use an external proxy server in the External Proxy
Settings.
The actual exception reported was:
java.net.ConnectException: Connection timed out: connect Charles
Proxy, http://www.charlesproxy.com/
Research that I have done before coming to SE:
I have searched in google with the keyword "Charles Error Report-Failed to connect to remote host". I got couple of links which are related to the above issue.
First link says to check for external proxy setting. I have checked, there are no external proxy settings in my computer.
Second link says open the url in browser and close charles proxy and reopen it. I did that. Still no luck.
How to overcome this issue?
Do you get the same problem with other proxies like Fiddler? If so, it's probably not related to Charles but either a network problem or inability of your application to work with a proxy.
Other causes may be using HTTPS (which can cause certificate errors) or using the loopback address (localhost or 127.0.0.1) which may or may not be ignored by the proxy.
UPDATE
In IE10+ Enhanced Protection Mode prevents untrusted applications from accessing local resources. Pages and sites that are not in the Trusted Zone are considered unstrusted, so they can't connect to any local proxy. Fiddler includes a configuration button to configure Windows 8 to bypass this. You can find a very good explanation of what happens and why here.
In Windows 8, EPM is enabled only for Metro IE. In 8.1 it is enabled by default even for Desktop IE.
You may be able to make Charles work again simply by adding your site's address to the Trusted Zone in IE's security settings, or you can download the EnableLoopBackUtility mentioned in Configure Fiddler for Windows 8 Metro-style applications to allow IE to connect to your site through the local proxy
I have experienced this as a timing or caching related gremlin. For me, in most cases, this is resolved by doing force-reload a few times in the browser. Doing so is slightly different on each platform. In Mac/Chrome, holding down Command + Shift + R for a couple of seconds does the trick. In Win/IE, holding Shift and clicking the reload icon in the address bar a couple of times does it - in theory, Shift + F5 should do the same thing, but it does not work as well.