Skip to main content
c3turner7
c3turner7
Gold ⭐️
July 4, 2023
Solved

Stuck loading after login

I'm new to NiFi, as you'll realize in this post. I'm trying to troubleshoot this issue where after I'm logging in with the provided password in the log file, I don't get past the loading screen. Here are things I've noticed: 

  1. in nifi.app log file, I get the error:
    1. Archive cleanup completed for container default; will now allow writing to this container.
  2. in cmd, I have this error: 
    1. Command Failed to set permissions so that only the owner can read status file [path]; this may allows others to have access to the key needed to communicate with NiFi. Permissions should be changed so that only the owner can read this file  
  3. when opening any .bat other than run-nifi.bat as administrator, the window immediately closes.
  4. This is the process that's looping over and over in the nifi-app.log file
    1. Screenshot 2023-07-04 102225.png

 

My feeling is that these are having to do with some sort of permission issue. I've tried taking the folder off read-only but that potential solution alone has been a rabbit hole of issues that I'm not even sure is correct. I noticed that there is a slightly different local url in this log file, tried that with the same issue (as opposed to the one provided on the website). I've tried downloading a fresh version of nifi as well. 

 

This has post has been my last resort since I cannot find anything on this issue online. TYIA 

c3turner7
c3turner7Answer
Gold ⭐️
July 5, 2023

Oh god. One of my chrome extensions was causing this issue. Dark Reader. Issue solved. 

View in thread

8 replies

DianaTorres
Community Manager
DianaTorres
Community Manager
July 4, 2023

@c3turner7 Welcome to the Cloudera Community!

To help you get the best possible solution, I have tagged our NiFi experts @cotopaul and @MattWho  who may be able to assist you further.

Please keep us updated on your post, and we hope you find a satisfactory solution to your query.

Translate
Regards, Diana Torres, Senior Community Moderator
    cotopaul
    cotopaul
    Platinum ⭐️
    July 5, 2023

    @c3turner7,

    For 1: that is actually not an error and you might ignore it. Does it get written with ERROR because as far as I know, that line is an INFO and it causes no issue/problem.

    For 2: based on my tests, you can ignore that message in windows as I received it constantly and NiFi works without any issue.

    For 3: Try recording your screen and see if any error gets printed in the CMD before being closed. When this happend to me, I had an issue with JAVA and it got printed in the logs or within the CMD window. Nevertheless, what CMDs are you trying to execute and why? They all have a purpose and if you start running them in blind you might cause other problems and make your debug much heavier than it already is.

    For 4: those are INFO lines, meaning that they are not affecting your application and you can ignore them.

    Now, circling back to your problem, what do you mean when saying that you do not pass the loading screen? Are you staring at a blank page or do you have the logo displayed constantly? A screenshot might help. In addition, I strongly suggest you to extract all the ERROR lines from your log (nifi-app.log and nifi-bootstrap.log) and paste them here. How did you configure nifi-properties and bootstrap.conf?

    Translate
      c3turner7
      c3turner7Author
      Gold ⭐️
      July 5, 2023

      Here's the screenshot of where I'm stuck at: Screenshot 2023-07-05 092753.png

       

      Good to know that those info lines don't mean anything serious and I can rule out any sort of security restrictions from Windows.

       

      As far as CMDs, the only one I've run is ctrl+C to shut down NiFi. To start up, I run as administrator to get the run-nifi.bat file open in the foreground and in trying the same thing with other .bat's they immediately close.

       

      Below are lines from nifi-bootstrap.log beginning with ERROR but then seem to elaborate into it being a WARNING seemingly about access. 

       

       

      2023-07-05 09:27:20,147 ERROR [NiFi logging handler] org.apache.nifi.StdErr WARNING: An illegal reflective access operation has occurred
      2023-07-05 09:27:20,147 ERROR [NiFi logging handler] org.apache.nifi.StdErr WARNING: Illegal reflective access by org.springframework.cglib.core.ReflectUtils (file:/C:/Users/chhri/NIFI-1~1.0/./work/nar/framework/nifi-framework-nar-1.22.0.nar-unpacked/NAR-INF/bundled-dependencies/spring-core-5.3.27.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int,java.security.ProtectionDomain)
      2023-07-05 09:27:20,147 ERROR [NiFi logging handler] org.apache.nifi.StdErr WARNING: Please consider reporting this to the maintainers of org.springframework.cglib.core.ReflectUtils
      2023-07-05 09:27:20,147 ERROR [NiFi logging handler] org.apache.nifi.StdErr WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
      2023-07-05 09:27:20,147 ERROR [NiFi logging handler] org.apache.nifi.StdErr WARNING: All illegal access operations will be denied in a future release

       

       

      I am not receiving any ERROR lines in my nifi-app.log file, all INFO.

       

      I have also not touched my nifi-properties and bootstrap.conf files yet. 

      Translate
      MattWho
      Titanium ⭐️⭐️⭐️
      MattWho
      Titanium ⭐️⭐️⭐️
      July 5, 2023

      @c3turner7 

      What version of Java are you suing with your Apache NiFi 1.22?


      Translate
      MattWho
      Titanium ⭐️⭐️⭐️
      MattWho
      Titanium ⭐️⭐️⭐️
      July 5, 2023

      @c3turner7 

      I suggest opening the developer tools in your browser and then observing the network communication between your browser and the NiFi server.  Form this you should see what the current request to load the NiFi UI post authentication credentials being provided is waiting on.  

      You could get and examine a JVM thread dump for your NIFi.  Getting multiple thread dumps space at least 1 min apart while it is in the state of loading the UI for comparison will allow you to see any threads that my not be changing from one dump to the next.  That info may help understand where exactly it is hung waiting on something.

      Hope this helps,

      Matt

      Translate
        c3turner7
        c3turner7Author
        Gold ⭐️
        July 5, 2023

        good idea. Looks like errors relating to asset loading. I could try redownloading java 11? Or try java 8?  Screenshot 2023-07-05 150618.png

        Translate
        c3turner7
        c3turner7AuthorAnswer
        Gold ⭐️
        July 5, 2023

        Oh god. One of my chrome extensions was causing this issue. Dark Reader. Issue solved. 

        Translate
        Terms & ConditionsAccessibility statement