NiFi: Unable to read expression language variables from external properties files

0
votes

I am trying to externalize the hard coded values into a properties file and use expression language syntax in my nifi workflows.

I have updated the nifi.properties with the following

nifi.variable.registry.properties=/opt/nifi/config/nifi_variables_dev.properties

And one of the entry in the prop file is

zookeeper.url=192.168.134.120:2181

And when i used the expression language syntax ${zookeeper.url}

And i am not seeing any error ( exclamation icon on the processor). Also is there a way to check what value does an expression evaluates to in Nifi.

By the way i am using nifi version 1.4.0.

and in the logs i am seeing the following error:

Directory '' does not have sufficient permissions (i.e., not writable and readable); rolling back session: {}java.lang.IllegalStateException: Directory '' does not have sufficient permissions (i.e., not writable and readable)

Thanks

1
apache-nifi
Did you restart NiFi after setting nifi.variable.registry.properties in nifi.properties? - Sivaprasanna Sethuraman
Yes i restarted nifi. - Sateesh K
where did you use expression ${zookeeper.url} ? - daggett
I have a GetFile Processor and for the Input Path i used ${input_path} and input_path is added to the properties file. Sorry zookeeper.url is used in some other processor. - Sateesh K
it should work as you described. try your new property in UpdateAttribute processor. - daggett

1 Answers

0
votes

It looks like variable registry is not supported in 1.4.0 !! We switched to nifi 1.5.0 and everything is working as expected.