java.lang.NoClassDefFoundError: com/google/gson/stream/JsonReader
at zipkin2.internal.JsonCodec$JsonReader.(JsonCodec.java:51) ~[classes/:?]
at zipkin2.internal.JsonCodec.readList(JsonCodec.java:143) ~[classes/:?]
at zipkin2.codec.SpanBytesDecoder$3.decodeList(SpanBytesDecoder.java:123) ~[classes/:?]
at zipkin2.collector.Collector.decodeList(Collector.java:196) ~[classes/:?]
at zipkin2.collector.Collector.acceptSpans(Collector.java:186) ~[classes/:?]
at zipkin2.collector.Collector.acceptSpans(Collector.java:172) ~[classes/:?]
at zipkin2.collector.kafka.KafkaCollectorWorker.run(KafkaCollectorWorker.java:111) ~[classes/:?]
at zipkin2.collector.kafka.KafkaCollector$LazyKafkaWorkers.lambda$guardFailures$0(KafkaCollector.java:265) ~[classes/:?]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:1.8.0_201]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:1.8.0_201]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_201]
Caused by: java.lang.ClassNotFoundException: com.google.gson.stream.JsonReader
at java.net.URLClassLoader.findClass(URLClassLoader.java:382) ~[?:1.8.0_201]
at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_201]
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349) ~[?:1.8.0_201]
at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_201]
... 11 more