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https://issues.apache.org/jira/browse/ZOOKEEPER-2972?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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wuyiyun updated ZOOKEEPER-2972:
-------------------------------
Labels: features (was: )
> When use SSL on zookeeper server, counts of watches may increase more than
> forty thousands and lead zoookeeper process outofmemory error
> ----------------------------------------------------------------------------------------------------------------------------------------
>
> Key: ZOOKEEPER-2972
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-2972
> Project: ZooKeeper
> Issue Type: Bug
> Components: recipes
> Affects Versions: 3.5.3
> Environment: I deploy a zookeeper cluster on three nodes. And enable
> ssl capability under below
> guidline:[https://cwiki.apache.org/confluence/display/ZOOKEEPER/ZooKeeper+SSL+User+Guide]
> And i use zookeeper client which also enable ssl capability to connect this
> zookeeper server and set same data to two node under below demo:
> CuratorFramework client;
> // each time we instance a new zookeeper client ....
> String path1, path2;
> // instance path1, path2 ......
> String status = "ok"
> client.client.setData().forPath(path1,status.getBytes());
> client.client.setData().forPath(path2,status.getBytes());
> // close zookeeper client.......
> This function will be called each five seconds and it work good while ssl
> capability disabled. when ssl capability enabled, zookeeper server run about
> one day, and an outofmemory error will occurred and auto produce
> java_pidXXX.hprof file by zookeeper process . i use Eclipse Memory Analyzer
> to analize the hprof file and found instance of DataTree used more than six
> handreds MB memory and more than eighty seven percent memory used by
> dataTree's field which name is dataWatches. And i use four letter command to
> check and found too many watches on all of this three nodes. I guess those
> too many watches cause the error but i don't know why there are so many
> watches!
> Additional, if disabled the ssl capability. use four letter command and can
> only found there are several watches on each node. and count of watches will
> not increased.
>
> Each zookeeper node run under VM which has eight core and eight GB memory,
> and it's os are centos6.5/centos7.3/redhat6.5/redhat7 and run zookeeper and
> this demo with JDK1.8.
> This issue will happened under zookeeper 3.5.1 and 3.5.2 and 3.5.3.
>
>
>
> .......
> Reporter: wuyiyun
> Priority: Major
> Labels: features
>
> When use SSL on zookeeper server, counts of watches may increase more than
> forty thousands and lead zoookeeper process outofmemroy error after zookeeper
> server started one day.
> check command:
> echo wchs | nc localhost 2181
> check result:
> [zookeeper@localhost bin]$ echo wchs | nc localhost 2181
> 44412 connections watching 1 paths
> Total watches:44412
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