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https://issues.apache.org/jira/browse/HADOOP-11772?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Akira AJISAKA updated HADOOP-11772:
-----------------------------------
Target Version/s: 2.8.0
Status: Patch Available (was: Open)
> RPC Invoker relies on static ClientCache which has synchronized(this) blocks
> ----------------------------------------------------------------------------
>
> Key: HADOOP-11772
> URL: https://issues.apache.org/jira/browse/HADOOP-11772
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: ipc
> Reporter: Gopal V
> Assignee: Akira AJISAKA
> Attachments: HADOOP-11772-001.patch, sync-client-bt.png,
> sync-client-threads.png
>
>
> {code}
> private static ClientCache CLIENTS=new ClientCache();
> ...
> this.client = CLIENTS.getClient(conf, factory);
> {code}
> Meanwhile in ClientCache
> {code}
> public synchronized Client getClient(Configuration conf,
> SocketFactory factory, Class<? extends Writable> valueClass) {
> ...
> Client client = clients.get(factory);
> if (client == null) {
> client = new Client(valueClass, conf, factory);
> clients.put(factory, client);
> } else {
> client.incCount();
> }
> {code}
> All invokers end up calling these methods, resulting in IPC clients choking
> up.
> !sync-client-threads.png!
> !sync-client-bt.png!
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