Multiple reports now. Can someone open an issue? Let’s try to figure out what’s happening.
-JZ > On Oct 25, 2016, at 1:19 PM, Benjamin Jaton <[email protected]> wrote: > > Hi Curtis, thanks for the feedback. > Do you know if there is a JIRA associated to this? > I also use PathChildrenCache to do deletions on the file system. May I ask > how you mitigated the issue? > > On Tue, Oct 25, 2016 at 6:17 AM, Cantrell, Curtis <[email protected] > <mailto:[email protected]>> wrote: > I have also experienced 3 delete events in the last year when there were no > actual deletes in ZK. I was using the delete events as a trigger to do an > actual deletion in the system. Since we experienced false deletes, I had to > rethink the way I was using the PathChildrenCache. > > > > Thank you, > > Curtis Cantrell > > > > > > From: Benjamin Jaton [mailto:[email protected] > <mailto:[email protected]>] > Sent: Monday, October 24, 2016 7:34 PM > To: [email protected] <mailto:[email protected]> > Subject: Re: Curator PathChildrenCache sends delete events but no delete > happened > > > > Hi Cameron, thanks for your answer. > > Yes I noticed that too, it seems to be coming from the ZK client layer. > I have tried to use the ZK Watcher API but I couldn't reproduce the issue > when I was using them. > > I will have a look at how PathChildrenCache does it and keep you posted. > > Thanks > > Benjamin > > > > On Mon, Oct 24, 2016 at 4:08 PM, Cameron McKenzie <[email protected] > <mailto:[email protected]>> wrote: > > hey Benjamin, > > I'm not aware of any such edge cases, but that does not mean that they don't > exist. From the log: > > > > 2016-10-24 15:52:43 DEBUG o.a.z.ClientCnxn:889 - Got WatchedEvent > state:SyncConnected type:NodeDeleted path:/benji2/123 for sessionid > 0x20014cf3d480003 > > > > This is being logged by the Zookeeper client itself that Curator is using. So > it doesn't appear to be Curator inferring some sort of delete event. It looks > like an explicit watched event coming from Zookeeper. > > > > cheers > > > > On Tue, Oct 25, 2016 at 10:04 AM, Benjamin Jaton <[email protected] > <mailto:[email protected]>> wrote: > > Hello, > > I am using PathChildrenCache and I am receiving delete events even if there > is no actual delete in ZK. I printed the WatchedEvent details for 2 of those > delete events (of the same node /benji2/123) I received in the same JVM run: > > > > 2016-10-24 15:52:43 DEBUG o.a.z.ClientCnxn:889 - Got WatchedEvent > state:SyncConnected type:NodeDeleted path:/benji2/123 for sessionid > 0x20014cf3d480003 > [PathChildrenCacheListener] delete event for /benji2/123 > PathChildrenCacheEvent{type=CHILD_REMOVED, data=ChildData{path='/benji2/123', > stat=19808389169191,19808389169191,1477335789916,1477335789916,0,0,0,0,0,0,19808389169191 > , data=[]}} > null > ChildData{path='/benji2/123', > stat=19808389169191,19808389169191,1477335789916,1477335789916,0,0,0,0,0,0,19808389169191 > , data=[]} > getAversion=0 > 2016-10-24 15:52:43 DEBUG o.a.z.ClientCnxn:867 - Got notification > sessionid:0x20014cf3d480003 > getCtime=1477335789916 > getCversion=0 > getCzxid=19808389169191 > getMtime=1477335789916 > 2016-10-24 15:52:43 DEBUG o.a.z.ClientCnxn:889 - Got WatchedEvent > state:SyncConnected type:NodeDeleted path:/benji2 for sessionid > 0x20014cf3d480003 > getMzxid=19808389169191 > getPzxid=19808389169191 > getVersion=0 > > (...) > > 2016-10-24 15:58:06 DEBUG o.a.z.ClientCnxn:889 - Got WatchedEvent > state:SyncConnected type:NodeDeleted path:/benji2/123 for sessionid > 0x20014cf3d480003 > [PathChildrenCacheListener] delete event for /benji2/123 > PathChildrenCacheEvent{type=CHILD_REMOVED, data=ChildData{path='/benji2/123', > stat=19808389169191,19808389169191,1477335789916,1477335789916,0,0,0,0,0,0,19808389169191 > , data=[]}} > null > 2016-10-24 15:58:06 DEBUG o.a.z.ClientCnxn:867 - Got notification > sessionid:0x20014cf3d480003 > ChildData{path='/benji2/123', > stat=19808389169191,19808389169191,1477335789916,1477335789916,0,0,0,0,0,0,19808389169191 > , data=[]} > getAversion=0 > getCtime=1477335789916 > getCversion=0 > getCzxid=19808389169191 > getMtime=1477335789916 > getMzxid=19808389169191 > getPzxid=19808389169191 > getVersion=0 > > > Are there known edge cases where this can happen? Again there is no delete at > all in ZK, I verified the transaction log of ZooKeeper, no delete is present). > > Thanks, > > Benjamin > > > > > > The information contained in this message is proprietary and/or confidential. > If you are not the intended recipient, please: (i) delete the message and all > copies; (ii) do not disclose, distribute or use the message in any manner; > and (iii) notify the sender immediately. In addition, please be aware that > any message addressed to our domain is subject to archiving and review by > persons other than the intended recipient. Thank you. >
