com.fasterxml.jackson.databind.JsonMappingException: Can not deserialize instance of java.util.LinkedHashMap out of VALUE_NUMBER_INT token
 at [Source: 2; line: 1, column: 1]
 at com.fasterxml.jackson.databind.JsonMappingException.from(JsonMappingException.java:270)
 at com.fasterxml.jackson.databind.DeserializationContext.reportMappingException(DeserializationContext.java:1247)
 at com.fasterxml.jackson.databind.DeserializationContext.handleUnexpectedToken(DeserializationContext.java:1122)
 at com.fasterxml.jackson.databind.DeserializationContext.handleUnexpectedToken(DeserializationContext.java:1075)
 at com.fasterxml.jackson.databind.deser.std.StdDeserializer._deserializeFromEmpty(StdDeserializer.java:892)
 at com.fasterxml.jackson.databind.deser.std.MapDeserializer.deserialize(MapDeserializer.java:358)
 at com.fasterxml.jackson.databind.deser.std.MapDeserializer.deserialize(MapDeserializer.java:27)
 at com.fasterxml.jackson.databind.ObjectMapper._readMapAndClose(ObjectMapper.java:3814)
 at com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:2858)
 at com.imooc.utils.JsonUtils.jsonToPojo(JsonUtils.java:52)
 at com.imooc.ZKCuratorClient$1.childEvent(ZKCuratorClient.java:90)
 at org.apache.curator.framework.recipes.cache.PathChildrenCache$5.apply(PathChildrenCache.java:520)
 at org.apache.curator.framework.recipes.cache.PathChildrenCache$5.apply(PathChildrenCache.java:514)
 at org.apache.curator.framework.listen.ListenerContainer$1.run(ListenerContainer.java:93)
 at org.apache.curator.shaded.com.google.common.util.concurrent.MoreExecutors$DirectExecutorService.execute(MoreExecutors.java:296)
 at org.apache.curator.framework.listen.ListenerContainer.forEach(ListenerContainer.java:85)
 at org.apache.curator.framework.recipes.cache.PathChildrenCache.callListeners(PathChildrenCache.java:512)
 at org.apache.curator.framework.recipes.cache.EventOperation.invoke(EventOperation.java:35)
 at org.apache.curator.framework.recipes.cache.PathChildrenCache$9.run(PathChildrenCache.java:771)
 at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
 at java.util.concurrent.FutureTask.run(Unknown Source)
 at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
 at java.util.concurrent.FutureTask.run(Unknown Source)
 at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
 at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
 at java.lang.Thread.run(Unknown Source)
2018-12-28 16:17:45,841 [Curator-PathChildrenCache-0] [org.apache.curator.framework.recipes.cache.PathChildrenCache.handleException(PathChildrenCache.java:569)] - [ERROR]
java.lang.NullPointerException
 at com.imooc.ZKCuratorClient$1.childEvent(ZKCuratorClient.java:91)
 at org.apache.curator.framework.recipes.cache.PathChildrenCache$5.apply(PathChildrenCache.java:520)
 at org.apache.curator.framework.recipes.cache.PathChildrenCache$5.apply(PathChildrenCache.java:514)
 at org.apache.curator.framework.listen.ListenerContainer$1.run(ListenerContainer.java:93)
 at org.apache.curator.shaded.com.google.common.util.concurrent.MoreExecutors$DirectExecutorService.execute(MoreExecutors.java:296)
 at org.apache.curator.framework.listen.ListenerContainer.forEach(ListenerContainer.java:85)
 at org.apache.curator.framework.recipes.cache.PathChildrenCache.callListeners(PathChildrenCache.java:512)
 at org.apache.curator.framework.recipes.cache.EventOperation.invoke(EventOperation.java:35)
 at org.apache.curator.framework.recipes.cache.PathChildrenCache$9.run(PathChildrenCache.java:771)
 at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
 at java.util.concurrent.FutureTask.run(Unknown Source)
 at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
 at java.util.concurrent.FutureTask.run(Unknown Source)
 at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
 at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
 at java.lang.Thread.run(Unknown Source)
2018-12-28 16:17:45,843 [Curator-PathChildrenCache-0] [com.imooc.ZKCuratorClient$1.childEvent(ZKCuratorClient.java:83)] - [INFO] 监听到事件 CHILD_ADDED