Try
  telnet <ip address> 5500

If that cannot connect then it is almost certainly a firewall issue.

On Wed, Sep 21, 2016 at 4:28 PM, Tseytlin, Keren
<keren.tseyt...@capitalone.com> wrote:
> Thanks for the answers Russell and Manish.
>
> It appears that it was an issue with the port 8000, when I moved it to
> something random then Nifi would start up.
>
> I¹m connecting to an EC2 that I¹ve set up because I need to test some AWS
> communication. Now that I have Nifi running, I¹m trying to connect with
> the debugger and getting the following error:
>
> Error running AWS Nifi: Unable to open debugger port
> (xx.xxx.xxx.xxx:5500): java.net.ConnectionException ³Operation timed out²
>
> Does this seem like a networking error? Pretty sure my security groups
> have opened up all port communication if coming from my IP.
>
> Keren
>
>
> On 9/21/16, 4:03 PM, "Russell Bateman"
> <russell.bate...@perfectsearchcorp.com> wrote:
>
>>Here's how I've been doing it for the last 6 months. I use IntelliJ, but
>>I'm also an Eclipse guy.
>>
>>http://www.javahotchocolate.com/notes/nifi.html#20160323
>>
>>Hope this helps.
>>
>>Russ
>>
>>On 09/21/2016 01:39 PM, Tseytlin, Keren wrote:
>>> Hi All,
>>>
>>> I want to set up the remote debugger with Nifi so that I can step
>>>through the code with IntelliJ. I noticed that last year someone else
>>>asked about how to set up remote debugging here ->
>>>https://mail-archives.apache.org/mod_mbox/nifi-dev/201508.mbox/%3C7641519
>>>c73cd4ad3832b80461b8ce...@mbx080-w2-co-2.exch080.serverpod.net%3E
>>>
>>> I followed these steps, and uncommented the line:
>>>java.arg.debug=-agentlib:jdwp=transport=dt_socket,server=y,suspend=n,addr
>>>ess=8000. However, when I do that I can't get Nifi to start up properly
>>>anymore. It will say that Nifi is running, but it will attempt to
>>>display an error page (which is some text with html formatting that
>>>doesn't get formatted properly).
>>>
>>> Has remote debugging changed in the past year or so since that thread
>>>was posted? Are there any other configs in Nifi that need to be changed?
>>>Would really appreciate additional detail for remote debugging with Nifi.
>>>
>>> Thanks,
>>> Keren
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>
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