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Bau
Bau
Silver ⭐️
September 15, 2021
Solved

NiFi suddently stopped working and not able to restart it

Hi,

 

I'm pretty new to NiFi and don't have much experience with it, so it's the reason I'm here.

 

Yesterday, NiFi was running smoothly and for some reason it stopped working. Every time I tried to start : ./nifi.sh start or any other command it showed me "killed". Later on, I found that java was killed by OOM. Fixed this by restarting server, but it won't start. In the "nifi-bootstrap.log" I found that it's getting shut down due to this error:
Capture.PNG
I haven't installed any packages, so don't know why it's giving me this error.

Setup:
Ubuntu 20
openjdk 11.0.11
nifi 1.13.2
Connector: mysql-connector-java-8.0.25.jar

What should I check? How to fix this error and start nifi?

Thanks in advance.

Azhar_Shaikh1
Azhar_Shaikh1Answer
Gold ⭐️
September 21, 2021

Can you take a back of up existing flow.xml.gz and remove the flow.xml.gz.  Once you removed the flow.xml.gz try restarting the nifi from the backend. 

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3 replies

Azhar_Shaikh1
Gold ⭐️
Azhar_Shaikh1
Gold ⭐️
September 16, 2021

Hello,

 

Have you checked the nifi app logs?  What errors you see in nif-app.log. 

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Bau
BauAuthor
Silver ⭐️
September 16, 2021

ERROR [main] o.a.n.c.serialization.FlowFromDOMFactory There was a problem decrypting a sensitive flow configuration value. Check that the nifi.sensitive.props.key value in nifi.properties matches the value used to encrypt the flow.xml.gz file

Was following this guide : https://community.cloudera.com/t5/Support-Questions/Failed-to-connect-node-to-cluster-because-local-flow/m-p/280186#M208717

But stuck witht finding config.zip file

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Azhar_Shaikh1
Gold ⭐️
Azhar_Shaikh1Answer
Gold ⭐️
September 21, 2021

Can you take a back of up existing flow.xml.gz and remove the flow.xml.gz.  Once you removed the flow.xml.gz try restarting the nifi from the backend. 

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