GitHub user leons727 opened a pull request:
https://github.com/apache/curator/pull/46
Performance fix in processChildren()
Current implementation may lead to a large number of calls to
java.util.ArrayList.contains() with a large list, when syncing a large number
of path children, as evident from this stack trace:
```
"main-EventThread" daemon prio=10 tid=0x00007fd089593800 nid=0x6fbf
runnable [0x00007fd0eb3a1000]
java.lang.Thread.State: RUNNABLE
at java.util.ArrayList.indexOf(ArrayList.java:298)
at java.util.ArrayList.contains(ArrayList.java:281)
at java.util.AbstractSet.removeAll(AbstractSet.java:176)
at
org.apache.curator.framework.recipes.cache.PathChildrenCache.processChildren(PathChildrenCache.java:655)
at
org.apache.curator.framework.recipes.cache.PathChildrenCache.access$200(PathChildrenCache.java:68)
at
org.apache.curator.framework.recipes.cache.PathChildrenCache$4.processResult(PathChildrenCache.java:490)
at
org.apache.curator.framework.imps.CuratorFrameworkImpl.sendToBackgroundCallback(CuratorFrameworkImpl.java:715)
at
org.apache.curator.framework.imps.CuratorFrameworkImpl.processBackgroundOperation(CuratorFrameworkImpl.java:502)
at
org.apache.curator.framework.imps.GetChildrenBuilderImpl$2.processResult(GetChildrenBuilderImpl.java:166)
at
org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:587)
at
org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:495)
```
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/leons727/curator master
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/curator/pull/46.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #46
----
commit bea6b80ec2622251156143b45c49a7f7871082cd
Author: Leon Stein <[email protected]>
Date: 2014-10-03T21:09:27Z
Performance fix in processChildren()
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