我为apache flume 1.7编写了自定义拦截器。拦截器必须为来自kafka源的所有事件设置特殊标头，该主题匹配由config定义的正则表达式。但它不起作用。我对java的了解太低，请帮我解决问题。 我的配置/etc/flume-ng/conf/flume.conf的一部分：
// index.ts
export { Class1 } from 'src/Class1'
export { Class2 } from 'src/Class2'
我在flume.log中遇到错误：
######################## kafka source ########################
agent.sources.kafka_source.type =
org.apache.flume.source.kafka.KafkaSource
agent.sources.kafka_source.interceptors = i1
agent.sources.kafka_source.interceptors.i1.type = org.apache.flume.interceptor.TopicRotationHeaderInterceptor
agent.sources.kafka_source.interceptors.i1.regex = stat_.+
agent.sources.kafka_source.interceptors.i1.value = hourly
agent.sources.kafka_source.interceptors.i1.default = daily
拦截器的源代码：
31 Jul 2017 18:41:11,819 ERROR [conf-file-poller-0] (org.apache.flume.channel.ChannelProcessor.configureInterceptors:118) - Could not instantiate Builder. Exception follows.
java.lang.InstantiationException: org.apache.flume.interceptor.TopicRotationHeaderInterceptor
at java.lang.Class.newInstance(Class.java:427)
at org.apache.flume.interceptor.InterceptorBuilderFactory.newInstance(InterceptorBuilderFactory.java:50)
at org.apache.flume.channel.ChannelProcessor.configureInterceptors(ChannelProcessor.java:111)
at org.apache.flume.channel.ChannelProcessor.configure(ChannelProcessor.java:82)
at org.apache.flume.conf.Configurables.configure(Configurables.java:41)
at org.apache.flume.node.AbstractConfigurationProvider.loadSources(AbstractConfigurationProvider.java:348)
at org.apache.flume.node.AbstractConfigurationProvider.getConfiguration(AbstractConfigurationProvider.java:101)
at org.apache.flume.node.PollingPropertiesFileConfigurationProvider$FileWatcherRunnable.run(PollingPropertiesFileConfigurationProvider.java:141)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.NoSuchMethodException: org.apache.flume.interceptor.TopicRotationHeaderInterceptor.<init>()
at java.lang.Class.getConstructor0(Class.java:3082)
at java.lang.Class.newInstance(Class.java:412)
... 14 more
31 Jul 2017 18:41:11,823 ERROR [conf-file-poller-0] (org.apache.flume.node.AbstractConfigurationProvider.loadSources:361) -
Source kafka_source has been removed due to an error during configuration
org.apache.flume.FlumeException: Interceptor.Builder not constructable.
at org.apache.flume.channel.ChannelProcessor.configureInterceptors(ChannelProcessor.java:119)
at org.apache.flume.channel.ChannelProcessor.configure(ChannelProcessor.java:82)
at org.apache.flume.conf.Configurables.configure(Configurables.java:41)
at org.apache.flume.node.AbstractConfigurationProvider.loadSources(AbstractConfigurationProvider.java:348)
at org.apache.flume.node.AbstractConfigurationProvider.getConfiguration(AbstractConfigurationProvider.java:101)
at org.apache.flume.node.PollingPropertiesFileConfigurationProvider$FileWatcherRunnable.run(PollingPropertiesFileConfigurationProvider.java:141)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.InstantiationException: org.apache.flume.interceptor.TopicRotationHeaderInterceptor
at java.lang.Class.newInstance(Class.java:427)
at org.apache.flume.interceptor.InterceptorBuilderFactory.newInstance(InterceptorBuilderFactory.java:50)
at org.apache.flume.channel.ChannelProcessor.configureInterceptors(ChannelProcessor.java:111)
... 12 more
Caused by: java.lang.NoSuchMethodException: org.apache.flume.interceptor.TopicRotationHeaderInterceptor.<init>()
at java.lang.Class.getConstructor0(Class.java:3082)
at java.lang.Class.newInstance(Class.java:412)
... 14 more
答案 0 :(得分：0)
您的flume.conf文件有错误，请更改
org.apache.flume.interceptor.TopicRotationHeaderInterceptor
有关：
org.apache.flume.interceptor.TopicRotationHeaderInterceptor ** $生成器**
这个invoque是拦截器类的构建方法
问候