任务运行时异常：java.lang.RuntimeException: topic_name

问题描述/异常栈

java.lang.RuntimeException: topic_name    
    at org.apache.flink.streaming.connectors.kafka.internal.KafkaPartitionDiscoverer.getAllPartitionsForTopics(KafkaPartitionDiscoverer.java:80)
    at org.apache.flink.streaming.connectors.kafka.internals.AbstractPartitionDiscoverer.discoverPartitions(AbstractPartitionDiscoverer.java:131)
    at org.apache.flink.streaming.connectors.kafka.FlinkKafkaConsumerBase.open(FlinkKafkaConsumerBase.java:508)
    at org.apache.flink.api.common.functions.util.FunctionUtils.openFunction(FunctionUtils.java:36)
    at org.apache.flink.streaming.api.operators.AbstractUdfStreamOperator.open(AbstractUdfStreamOperator.java:102)
    at org.apache.flink.streaming.runtime.tasks.StreamTask.initializeStateAndOpen(StreamTask.java:1007)
    at org.apache.flink.streaming.runtime.tasks.StreamTask.lambda$beforeInvoke$0(StreamTask.java:454)
    at org.apache.flink.streaming.runtime.tasks.StreamTaskActionExecutor$SynchronizedStreamTaskActionExecutor.runThrowing(StreamTaskActionExecutor.java:94)
    at org.apache.flink.streaming.runtime.tasks.StreamTask.beforeInvoke(StreamTask.java:449)
    at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:461)
    at org.apache.flink.runtime.taskmanager.Task.doRun(Task.java:707)
    at org.apache.flink.runtime.taskmanager.Task.run(Task.java:532)
    at java.lang.Thread.run(Thread.java:748)

解决方案

检查topic名称是否正确，是否有不显示的特殊字符。

问题原因

登记topic名称不正确，可能登记时存在空格导致。

作者：邓崃翔