我正在尝试提交一个使用scala 2.11创建的flink作业，该作业在本地flink集群中使用twitter流api，方法是在命令行中运行： flink run -c org.myClass C:\path\to\jarFile.jar 并得到以下错误：
2019-06-09 23:40:47,758 WARN org.apache.flink.runtime.webmonitor.handlers.JarRunHandler - Configuring the job submission via query parameters is deprecated. Please migrate to submitting a JSON request instead.
2019-06-09 23:40:47,762 ERROR org.apache.flink.runtime.webmonitor.handlers.JarRunHandler - Unhandled exception.
org.apache.flink.client.program.ProgramInvocationException: The program caused an error:
at org.apache.flink.client.program.OptimizerPlanEnvironment.getOptimizedPlan(OptimizerPlanEnvironment.java:93)
at org.apache.flink.client.program.PackagedProgramUtils.createJobGraph(PackagedProgramUtils.java:80)
at org.apache.flink.runtime.webmonitor.handlers.utils.JarHandlerUtils$JarHandlerContext.toJobGraph(JarHandlerUtils.java:126)
at org.apache.flink.runtime.webmonitor.handlers.JarRunHandler.lambda$getJobGraphAsync$6(JarRunHandler.java:142)
at java.util.concurrent.CompletableFuture$AsyncSupply.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.NoClassDefFoundError: org/apache/flink/streaming/connectors/twitter/TwitterSource$EndpointInitializer
at msciss.TwitterHashtagCounter.main(TwitterHashtagCounter.scala)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.apache.flink.client.program.PackagedProgram.callMainMethod(PackagedProgram.java:529)
at org.apache.flink.client.program.PackagedProgram.invokeInteractiveModeForExecution(PackagedProgram.java:421)
at org.apache.flink.client.program.OptimizerPlanEnvironment.getOptimizedPlan(OptimizerPlanEnvironment.java:83)
... 7 more
Caused by: java.lang.ClassNotFoundException: org.apache.flink.streaming.connectors.twitter.TwitterSource$EndpointInitializer
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 15 more但是在程序中，我在build.sbt中设置了twittersource库：
val flinkDependencies = Seq(
"org.apache.flink" %% "flink-scala" % flinkVersion % "provided",
"org.apache.flink" %% "flink-streaming-scala" % flinkVersion % "provided",
"org.apache.flink" %% "flink-connector-twitter" % flinkVersion,
"commons-logging" % "commons-logging" % "1.2",
"org.apache.logging.log4j" % "log4j-core" % "2.11.2",
"org.apache.commons" % "commons-text" % "1.6")该应用程序在intellij中也运行正常，sbt buld/package不会产生任何问题。如何解决此问题？
2条答案
按热度按时间7gs2gvoe1#
我有一个胖jar。当我分解它时，我可以看到连接器的依赖关系也是。然而，当我将jar作为flink作业提交时，我得到了一个classnotfoundexception。
原因是什么？
qlckcl4x2#
你需要使用
sbt assembly插件或任何其他允许创建胖jar（uberjar）的插件。当前，您的包不包含外部库，并且flink连接器被视为外部库，因为它们不包括在标准二进制生成中。因此，实际上您正在创建的包不包含twitter-connector，但flink本身也没有，这就是为什么你得到ClassNotFoundException.