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Nifi starts without error but cannot connect

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Contributor

Hi

 

I am very new to nifi and try to install and configure the system.

 

I started nifi.sh start and it shows 

 

Java home: /Library/Java/JavaVirtualMachines/jdk1.8.0_65.jdk/Contents/Home

NiFi home: /Users/daniel/Downloads/nifi-1.15.3

 

Bootstrap Config File: /Users/daniel/Downloads/nifi-1.15.3/conf/bootstrap.conf

 

And when i enter nifi.sh  status, terminal shows:

 

2022-02-26 09:31:33,238 INFO [main] org.apache.nifi.bootstrap.Command Apache NiFi is currently running, listening to Bootstrap on port 52929, PID=74313

 

I changed nifi.web.http.port in nifi.properties to 8080.

 

But still I do not see any on localhost:8080.

 

In the log file there is no message that server has started on 8080 port.

 

I have no idea what problem caused the issue.

 

Please advise me.

 

Thanks

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25 REPLIES 25

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Super Guru

That's really weird. I executed exactly the commands that I listed and it works for me. 

Are you sure that you started in an empty directory?

 

What the OS of your computer?

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@araujo 

 

macOS Monterey v 12.2.1

 

Since the wget command did not work on the terminal, I directly enter the url and downloaded .tar file and follow exactly as you explained. 

Thanks.

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Super Guru

Can you please upload your nifi-app.log here?

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Super Guru

And the nifi-bootstrap.log file as well, please.

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@araujo 

 

Do you know how to upload file? because it says "The file type (.log) is not supported."

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Super Guru

Just rename the file to .txt and try to upload.

If it doesn't work, you can copy and paste the content in a Word document (.docx)

 

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@CookieCream 

 

Did you solve the problem? Are you able to share the logs?

 

André

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@araujo 

As I updated jdk version to 17.0.2, it works!!!

 

It might be silly but have a couple more questions:

1. As I check for the java version on the terminal, it shows the right version

java version "17.0.2" 2022-01-18 LTS
Java(TM) SE Runtime Environment (build 17.0.2+8-LTS-86)
Java HotSpot(TM) 64-Bit Server VM (build 17.0.2+8-LTS-86, mixed mode, sharing)

But JAVA_HOME environment variable holds the old directory and I have to type 'export JAVA_HOME = 

/Library/Java/JavaVirtualMachines/jdk-17.0.2.jdk/Contents/Home' every time I open the terminal to launch nifi.

Could you tell me how to set JAVA_HOME permanently?

 

2. When I access to nifi, it asks me to enter User and Password.

I found the answer for the same issue and it says that I could find the user info as search text 'Generated User'/'Generated Password' on nifi-app.log, but I do not see any information

 

Thank you.

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Super Guru

Hi, @CookieCream 

 


As I updated jdk version to 17.0.2, it works!!!

Great to hear it works. However, as I mentioned in my previous post, please note that NiFi is not supported on Java 17, only Java 8 and 11. Please bear this in mind. If you find any strange behaviour, try using Java 11 instead.

 

It might be silly but have a couple more questions:

1. As I check for the java version on the terminal, it shows the right version

 

 

java version "17.0.2" 2022-01-18 LTS
Java(TM) SE Runtime Environment (build 17.0.2+8-LTS-86)
Java HotSpot(TM) 64-Bit Server VM (build 17.0.2+8-LTS-86, mixed mode, sharing)

 

 

But JAVA_HOME environment variable holds the old directory and I have to type 'export JAVA_HOME = 

/Library/Java/JavaVirtualMachines/jdk-17.0.2.jdk/Contents/Home' every time I open the terminal to launch nifi.

Could you tell me how to set JAVA_HOME permanently?

 I'm not sure how JAVA_HOME is being set in your environment. I guess this depends on how Java 8 was installed in the first place.

 

But one way to overwrite this is to add the export command at the end of you ~/.bashrc file. This way it will be executed automatically every time you open a new terminal.

 

2. When I access to nifi, it asks me to enter User and Password.

I found the answer for the same issue and it says that I could find the user info as search text 'Generated User'/'Generated Password' on nifi-app.log, but I do not see any information

 

Thank you.


If you ran the commands I listed before, you executed this as well: 

 

 

./bin/nifi.sh set-single-user-credentials admin supersecret1

 

 

 

This sets your credentials to admin/supersecret1, instead of getting them generated randomly. Try using these credentials to log in.

 

Cheers,

André

 

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