[jira] Updated: (ZOOKEEPER-336) single bad client can cause server to stop accepting connections

["Flavio Paiva Junqueira (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/ZOOKEEPER-336?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Flavio Paiva Junqueira updated ZOOKEEPER-336:
---------------------------------------------

    Status: Open  (was: Patch Available)

> single bad client can cause server to stop accepting connections
> ----------------------------------------------------------------
>
>                 Key: ZOOKEEPER-336
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-336
>             Project: Zookeeper
>          Issue Type: Improvement
>          Components: c client, java client, server
>            Reporter: Patrick Hunt
>            Assignee: Henry Robinson
>            Priority: Critical
>             Fix For: 3.2.0
>
>         Attachments: ZOOKEEPER-336.patch, ZOOKEEPER-336.patch, ZOOKEEPER-336.patch, ZOOKEEPER-336.patch
>
>
> One user saw a case where a single mis-programmed client was overloading the server with connections - the client was creating a huge number of sessions to the server. This caused all of the fds on the  server to become used.
> Seems like we should have some way of limiting (configurable override) the maximum number of sessions from a single client (say 10 by default?) Also we should output warnings when this limit is exceeded (or attempt to exceed).

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