我使用
在我的OSX机器上安装了NiFibrew install nifi
这很好用，但是当我运行命令时
nifi run
我检查了nifi-app日志，这就是弹出的内容：
2017-10-27 00:24:26,211 WARN [main] org.apache.nifi.bootstrap.Command
Launched Apache NiFi but could not determined the Process ID
我也试过了nifi start但是获得以下状态：
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
不确定我是否需要编辑某些内容，但我对PID的关注是未知的。
编辑： 运行时
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
答案 0 :(得分：3)
我使用的是JDK 9.从今天开始，这不起作用。我降级到JDK 8，瞧！谢谢你们
答案 1 :(得分：1)
无需下载到JDK 8，但您确实需要安装它。
我有一个app（nifi），它在JDK 9上不起作用，所以我想切换JDK版本。
这是命令
/usr/libexec/java_home -V
正确的输出
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
如果只选择一个主要版本，你可以这样做
export JAVA_HOME=`/usr/libexec/java_home -v 1.8`
我现在只需要选择这个Java，然后将其导出。并运行启动脚本......
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
它现在有效。