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From "Himanshu (JIRA)" <j...@apache.org>
Subject [jira] [Created] (CURATOR-191) Curator delivering out-of-order and duplicate events to PathChildrenCacheListener
Date Mon, 02 Mar 2015 20:12:04 GMT
Himanshu created CURATOR-191:
--------------------------------

             Summary: Curator delivering out-of-order and duplicate events to PathChildrenCacheListener
                 Key: CURATOR-191
                 URL: https://issues.apache.org/jira/browse/CURATOR-191
             Project: Apache Curator
          Issue Type: Bug
         Environment: Zookeeper version - 3.4.5
Curator Version - 2.7.0
            Reporter: Himanshu
            Assignee: Jordan Zimmerman


It is very hard to reproduce, but from our procudtion logs we can see that sometimes, PathChildrenCacheListener.childEvent(..)
is receiving events which are out-of-order and duplicate.

We have following line in the code...
ChildEvent child = event.getData()
log.info("CHILD_UPDATED[%s] with version[%s]", child.getPath(), event.getData().getStat().getVersion());


and observed following the logs..

2015-02-16 11:18:32,412 INFO [ServerInventoryView-0] io.druid.curator.inventory.CuratorInventoryManager
- CHILD_UPDATED[2015-02-11T22:01:43.441Z3] with version[3]
2015-02-16 11:19:04,773 INFO [ServerInventoryView-0] io.druid.curator.inventory.CuratorInventoryManager
- CHILD_UPDATED[2015-02-11T22:01:43.441Z3] with version[5]
2015-02-16 11:20:09,039 INFO [ServerInventoryView-0] io.druid.curator.inventory.CuratorInventoryManager
- CHILD_UPDATED[2015-02-11T22:01:43.441Z3] with version[4]
2015-02-16 11:20:41,420 INFO [ServerInventoryView-0] io.druid.curator.inventory.CuratorInventoryManager
- CHILD_UPDATED[2015-02-11T22:01:43.441Z3] with version[5]
2015-02-16 11:20:41,437 INFO [ServerInventoryView-0] io.druid.curator.inventory.CuratorInventoryManager
- CHILD_UPDATED[2015-02-11T22:01:43.441Z3] with version[6]
2015-02-16 11:21:13,737 INFO [ServerInventoryView-0] io.druid.curator.inventory.CuratorInventoryManager
- CHILD_UPDATED[2015-02-11T22:01:43.441Z3] with version[6]
2015-02-16 11:22:51,089 INFO [ServerInventoryView-0] io.druid.curator.inventory.CuratorInventoryManager
- CHILD_UPDATED[2015-02-11T22:01:43.441Z3] with version[7]
2015-02-16 11:23:23,400 INFO [ServerInventoryView-0] io.druid.curator.inventory.CuratorInventoryManager
- CHILD_UPDATED[2015-02-11T22:01:43.441Z3] with version[8]
2015-02-16 11:27:08,895 INFO [ServerInventoryView-0] io.druid.curator.inventory.CuratorInventoryManager
- CHILD_UPDATED[2015-02-11T22:01:43.441Z3] with version[7]
2015-02-16 11:27:41,591 INFO [ServerInventoryView-0] io.druid.curator.inventory.CuratorInventoryManager
- CHILD_UPDATED[2015-02-11T22:01:43.441Z3] with version[9]
2015-02-16 11:27:41,705 INFO [ServerInventoryView-0] io.druid.curator.inventory.CuratorInventoryManager
- CHILD_UPDATED[2015-02-11T22:01:43.441Z3] with version[8]
2015-02-16 11:32:32,751 INFO [ServerInventoryView-0] io.druid.curator.inventory.CuratorInventoryManager
- CHILD_UPDATED[2015-02-11T22:01:43.441Z3] with version[10]



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