[
https://issues.apache.org/jira/browse/HBASE-20597?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Andrew Purtell updated HBASE-20597:
-----------------------------------
Description: The code that closes down a ZKW that fails to initialize when
attempting to connect to the remote cluster is not MT safe and can in theory
leak ZooKeeperWatcher instances. The allocation of a new ZKW and store to the
reference is not atomic. Might have concurrent allocations with only one
winning store, leading to leaked ZKW instances. (was: The code that closes
down a ZKW that fails to initialize when attempting to connect to the remote
cluster is not MT safe and can in theory leak ZooKeeperWatcher instances. The
allocation of a new ZKW and store to the reference is not atomic. Might have
concurrent allocations with only one winning store, leading to leaked ZKW
instances. If the connection problem is persistent, like loss of shared trust
between the clusters, we may accumulate unclosed ZKW instances over time, with
a ZK send thread and event thread each, and eventually have enough leaked
threads to cause OOME (cannot allocate native thread). )
> Use a lock to serialize access to a shared reference to ZooKeeperWatcher in
> HBaseReplicationEndpoint
> ----------------------------------------------------------------------------------------------------
>
> Key: HBASE-20597
> URL: https://issues.apache.org/jira/browse/HBASE-20597
> Project: HBase
> Issue Type: Bug
> Affects Versions: 1.3.2, 1.4.4
> Reporter: Andrew Purtell
> Assignee: Andrew Purtell
> Priority: Minor
> Fix For: 3.0.0, 2.1.0, 1.5.0, 1.3.3, 2.0.1, 1.4.5
>
>
> The code that closes down a ZKW that fails to initialize when attempting to
> connect to the remote cluster is not MT safe and can in theory leak
> ZooKeeperWatcher instances. The allocation of a new ZKW and store to the
> reference is not atomic. Might have concurrent allocations with only one
> winning store, leading to leaked ZKW instances.
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
