Not a lot of insights until now... I suspect that my free subscription to AWS EC2 could be the culprit (how could I be sure that it's the root cause?). It is possible that the default config (t2.micro) does not give enough memory to run nifi. I'll try with a t2.small instance. ... View more

Hi everybody, I'm installing Nifi with Ambari on AWS EC2. I got a similar error. What shall I do? Here the nifi-app.log: 2017-08-09 04:42:52,225 WARN [main] org.apache.nifi.web.server.JettyServer Failed to start web server... shutting down. java.net.BindException: Cannot assign requested address at sun.nio.ch.Net.bind0(Native Method) at sun.nio.ch.Net.bind(Net.java:433) at sun.nio.ch.Net.bind(Net.java:425) at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:223) at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:74) at org.eclipse.jetty.server.ServerConnector.open(ServerConnector.java:298) at org.eclipse.jetty.server.AbstractNetworkConnector.doStart(AbstractNetworkConnector.java:80) at org.eclipse.jetty.server.ServerConnector.doStart(ServerConnector.java:236) at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68) at org.eclipse.jetty.server.Server.doStart(Server.java:431) at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68) at org.apache.nifi.web.server.JettyServer.start(JettyServer.java:705) at org.apache.nifi.NiFi.<init>(NiFi.java:160) at org.apache.nifi.NiFi.main(NiFi.java:267) 2017-08-09 04:42:52,228 INFO [Thread-1] org.apache.nifi.NiFi Initiating shutdown of Jetty web server... 2017-08-09 04:42:52,236 INFO [Thread-1] o.eclipse.jetty.server.AbstractConnector Stopped ServerConnector@25b88b09{HTTP/1.1,[http/1.1]}{<FQDN-of-my-EC2-instance>:9090} 2017-08-09 04:42:52,236 INFO [Thread-1] org.eclipse.jetty.server.session Stopped scavenging ... View more

So I "proceed anyway". Nifi starts on all nodes but after a couple of minutes stopped. I can't connect to the NFI UI on any node (error return by Edge: INET_E_RESOURCE_NOT_FOUND). What's wrong ? Where to look? ... View more

It seems that the content of this page has changed. There's no more information about ambari. Does somebody know where to find a tutorial to start nifi with ambari (for beginner)? ... View more

Note: Most usefull doc on the subject for me: https://docs.hortonworks.com/HDPDocuments/HDF2/HDF-2.1.4/bk_ambari-installation/bk_ambari-installation.pdf ... View more

Again replying my own last question, I find here that it is possible to configure Ambari for non-root access. ... View more

I passed a step forward now: I achieve password-less connection between instances using my key1 key pair with the ec2-user. For future me (and others who still wonder how), here are the steps: With key1.pem (my private key associated to the ec2-user of AWS), I generate the corresponding key1.pub key using putTTYgen (open puTTYgen, load the key1.pem or key1.ppk private key and then click "Save public key" button. I open a CMD Windows and do: pscp -i Key1.ppk Key1.pem ec2-user@<node name>.us-west-2.compute.amazonaws.com:.ssh/ pscp -i Key1.ppk Key1.pub ec2-user@<node name>.us-west-2.compute.amazonaws.com:.ssh/ (each time you will see something like : Key1.xxx | 0 kB | 0.5 kB/s | ETA: 00:00:00 | 100%) I open a terminal window on my EC2 node using PUTTY as ec2-user (with my Key1.ppk private key) and then I go into .ssh directory. [ec2-user@ip-xxx-xx-xx-xx ~]$ cd .ssh Then I protect the 2 key files (otherwize they will be refused by ssh) [ec2-user@ip-xxx-xx-xxx-xx .ssh]$ chmod 600 Key1* Now I can connect from this node to any other node without any password using the command: [ec2-user@ip-xxx-xx-xxx-xx .ssh]$ ssh -i Key1.pem ec2-user@<second node>.us-west-2.compute.amazonaws.com That's it! Remaining question: to install and setup Ambari do I need to use root or can I do it as ec2-user? ... View more

Thanks @Jay SenSharma for the information. ... View more

I begin to doubt that it is possible to reuse the same private key to connect to the instances as ec2-user from my local machine and to setup passowrd-less connections between the different instances. All installation documents of Ambari (to setup HDF or Nifi) point to the use of root user. But I could'nt connect as root@<myinstancename> from one instance to another or with putty on my local machine Under Windows to one instance. ... View more

Thanks @Jay SenSharma. I used this document but I can't achieve what I want to do : setup password-less SSH between my EC2 instances running RHEL7 from my local machine running Windows. I've open a new thread (here) to give more details. ... View more

Hi how can i do the same with a local system running Windows? ... View more