Can't run NiFi on OSX - homebrew

Question

I installed NiFi on my OSX machine using
brew install nifi
This worked fine, but when I run the command
nifi run
I checked the nifi-app log and this is what pops out:
2017-10-27 00:24:26,211 WARN [main] org.apache.nifi.bootstrap.Command
Launched Apache NiFi but could not determined the Process ID
I tried nifi startas well but get the following as status:
2017-10-27 00:26:48,081 INFO [main] org.apache.nifi.bootstrap.Command
Apache NiFi is currently running, listening to Bootstrap on port
50289, PID=unknown
Not sure if I have to edit something, but I'm concerned by PID is unknown.
EDIT:
When running
2017-10-27 11:14:13,809 ERROR [main] org.apache.nifi.NiFi Failure to
launch NiFi due to java.util.ServiceConfigurationError:
org.apache.nifi.processor.Processor: Provider
org.apache.nifi.processors.standard.ParseCEF could not be instantiated
java.util.ServiceConfigurationError:
org.apache.nifi.processor.Processor: Provider
org.apache.nifi.processors.standard.ParseCEF could not be instantiated
at java.base/java.util.ServiceLoader.fail(ServiceLoader.java:581)
at java.base/java.util.ServiceLoader.access$100(ServiceLoader.java:390)
at java.base/java.util.ServiceLoader$ProviderImpl.newInstance(ServiceLoader.java:799)
at java.base/java.util.ServiceLoader$ProviderImpl.get(ServiceLoader.java:721)
at java.base/java.util.ServiceLoader$3.next(ServiceLoader.java:1389)
at org.apache.nifi.nar.ExtensionManager.loadExtensions(ExtensionManager.java:142)
at org.apache.nifi.nar.ExtensionManager.discoverExtensions(ExtensionManager.java:117)
at org.apache.nifi.web.server.JettyServer.start(JettyServer.java:702)
at org.apache.nifi.NiFi.<init>(NiFi.java:160)
at org.apache.nifi.NiFi.main(NiFi.java:268)
Caused by: java.lang.NoClassDefFoundError: javax/xml/bind/JAXBException
at org.apache.bval.jsr.ConfigurationImpl.parseValidationXml(ConfigurationImpl.java:357)
at org.apache.bval.jsr.ConfigurationImpl.createBootstrapConfiguration(ConfigurationImpl.java:349)
at org.apache.bval.jsr.ConfigurationImpl.prepare(ConfigurationImpl.java:340)
at org.apache.bval.jsr.ConfigurationImpl.__privileged_doBuildValidatorFactory(ConfigurationImpl.java:329)
at org.apache.bval.jsr.ConfigurationImpl.doBuildValidatorFactory(ConfigurationImpl.java)
at org.apache.bval.jsr.ConfigurationImpl.buildValidatorFactory(ConfigurationImpl.java:324)
at org.apache.nifi.processors.standard.ParseCEF.<init>(ParseCEF.java:179)
at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:488)
at java.base/java.util.ServiceLoader$ProviderImpl.newInstance(ServiceLoader.java:777)
... 7 common frames omitted
Caused by: java.lang.ClassNotFoundException: javax.xml.bind.JAXBException
at java.base/java.net.URLClassLoader.findClass(URLClassLoader.java:466)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:563)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:496)
... 19 common frames omitted

Answer 1

I was using JDK 9. Turns out as of today, this doesn't work. I downgraded to JDK 8 and voila! Thanks y'all

Answer 2

No need to download to JDK 8, but you do need it installed.
Picking which JDK to Run
I have an app (nifi) which does not work on JDK 9, so I want to switch the JDK Version.
List Possible Versions
This is the command
/usr/libexec/java_home -V
And the correctponing output
Matching Java Virtual Machines (2):
9.0.1, x86_64: "Java SE 9.0.1" /Library/Java/JavaVirtualMachines/jdk-9.0.1.jdk/Contents/Home
1.8.0_151, x86_64: "Java SE 8" /Library/Java/JavaVirtualMachines/jdk1.8.0_151.jdk/Contents/Home
/Library/Java/JavaVirtualMachines/jdk-9.0.1.jdk/Contents/Home
Set your Java-Home
For picking just a major Version you can do this
export JAVA_HOME=`/usr/libexec/java_home -v 1.8`
Run App (nifi)
I now just need to select this Java, export it. And run the startup script...
export JAVA_HOME=`/usr/libexec/java_home -v 1.8`
tim#T-Mac-mini bin $ java -version
java version "1.8.0_151"
Java(TM) SE Runtime Environment (build 1.8.0_151-b12)
Java HotSpot(TM) 64-Bit Server VM (build 25.151-b12, mixed mode)
tim#TMac-mini bin $ ./nifi.sh run
It now works.