coding4cc commented on issue #7893: Will some PathChildrenCacheEvent be missed after the connection to zk reconnected URL: https://github.com/apache/incubator-druid/issues/7893#issuecomment-530645386 same question with version: 0.15.1 `2019-09-12T03:02:55,821 WARN [ServerInventoryView-0] org.apache.druid.curator.inventory.CuratorInventoryManager - Exception while getting data for node /druid/segments/172.16.1.45:8101/172.16.1.45:8101_indexer-executor__default_tier_2019-09-12T02:51:56.741Z_2b8af442ede5453fa817247839cca3630 org.apache.zookeeper.KeeperException$NoNodeException: KeeperErrorCode = NoNode for /druid/segments/172.16.1.45:8101/172.16.1.45:8101_indexer-executor__default_tier_2019-09-12T02:51:56.741Z_2b8af442ede5453fa817247839cca3630 at org.apache.zookeeper.KeeperException.create(KeeperException.java:114) ~[zookeeper-3.4.11.jar:3.4.11-37e277162d567b55a07d1755f0b31c32e93c01a0] at org.apache.zookeeper.KeeperException.create(KeeperException.java:54) ~[zookeeper-3.4.11.jar:3.4.11-37e277162d567b55a07d1755f0b31c32e93c01a0] at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1215) ~[zookeeper-3.4.11.jar:3.4.11-37e277162d567b55a07d1755f0b31c32e93c01a0] at org.apache.curator.framework.imps.GetDataBuilderImpl$4.call(GetDataBuilderImpl.java:327) ~[curator-framework-4.1.0.jar:4.1.0] at org.apache.curator.framework.imps.GetDataBuilderImpl$4.call(GetDataBuilderImpl.java:316) ~[curator-framework-4.1.0.jar:4.1.0] at org.apache.curator.connection.StandardConnectionHandlingPolicy.callWithRetry(StandardConnectionHandlingPolicy.java:64) ~[curator-client-4.1.0.jar:?] at org.apache.curator.RetryLoop.callWithRetry(RetryLoop.java:100) ~[curator-client-4.1.0.jar:?] at org.apache.curator.framework.imps.GetDataBuilderImpl.pathInForeground(GetDataBuilderImpl.java:313) ~[curator-framework-4.1.0.jar:4.1.0] at org.apache.curator.framework.imps.GetDataBuilderImpl.forPath(GetDataBuilderImpl.java:304) ~[curator-framework-4.1.0.jar:4.1.0] at org.apache.curator.framework.imps.GetDataBuilderImpl$1.forPath(GetDataBuilderImpl.java:107) ~[curator-framework-4.1.0.jar:4.1.0] at org.apache.curator.framework.imps.GetDataBuilderImpl$1.forPath(GetDataBuilderImpl.java:67) ~[curator-framework-4.1.0.jar:4.1.0] at org.apache.druid.curator.inventory.CuratorInventoryManager.getZkDataForNode(CuratorInventoryManager.java:177) [druid-server-0.15.1-incubating.jar:0.15.1-incubating] at org.apache.druid.curator.inventory.CuratorInventoryManager.access$400(CuratorInventoryManager.java:58) [druid-server-0.15.1-incubating.jar:0.15.1-incubating] at org.apache.druid.curator.inventory.CuratorInventoryManager$ContainerCacheListener$InventoryCacheListener.childEvent(CuratorInventoryManager.java:404) [druid-server-0.15.1-incubating.jar:0.15.1-incubating] at org.apache.curator.framework.recipes.cache.PathChildrenCache$5.apply(PathChildrenCache.java:538) [curator-recipes-4.1.0.jar:4.1.0] at org.apache.curator.framework.recipes.cache.PathChildrenCache$5.apply(PathChildrenCache.java:532) [curator-recipes-4.1.0.jar:4.1.0] at org.apache.curator.framework.listen.ListenerContainer$1.run(ListenerContainer.java:93) [curator-framework-4.1.0.jar:4.1.0] at org.apache.curator.shaded.com.google.common.util.concurrent.MoreExecutors$DirectExecutor.execute(MoreExecutors.java:435) [curator-client-4.1.0.jar:?] at org.apache.curator.framework.listen.ListenerContainer.forEach(ListenerContainer.java:85) [curator-framework-4.1.0.jar:4.1.0] at org.apache.curator.framework.recipes.cache.PathChildrenCache.callListeners(PathChildrenCache.java:530) [curator-recipes-4.1.0.jar:4.1.0] at org.apache.curator.framework.recipes.cache.EventOperation.invoke(EventOperation.java:35) [curator-recipes-4.1.0.jar:4.1.0] at org.apache.curator.framework.recipes.cache.PathChildrenCache$9.run(PathChildrenCache.java:808) [curator-recipes-4.1.0.jar:4.1.0] at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_191] at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_191] at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_191] at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_191] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:1.8.0_191] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:1.8.0_191] at java.lang.Thread.run(Thread.java:748) [?:1.8.0_191] `
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