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https://issues.apache.org/jira/browse/TINKERPOP-1726?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16370171#comment-16370171
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ASF GitHub Bot commented on TINKERPOP-1726:
-------------------------------------------
Github user spmallette commented on a diff in the pull request:
https://github.com/apache/tinkerpop/pull/800#discussion_r169365417
--- Diff: docs/src/reference/gremlin-applications.asciidoc ---
@@ -1073,7 +1073,8 @@ The following table describes the various
configuration options that Gremlin Ser
|graphs |A `Map` of `Graph` configuration files where the key of the `Map`
becomes the name to which the `Graph` will be bound and the value is the file
name of a `Graph` configuration file. |_none_
|gremlinPool |The number of "Gremlin" threads available to execute actual
scripts in a `ScriptEngine`. This pool represents the workers available to
handle blocking operations in Gremlin Server. When set to `0`, Gremlin Server
will use the value provided by `Runtime.availableProcessors()`. |0
|host |The name of the host to bind the server to. |localhost
-|useEpollEventLoop |try to use epoll event loops (works only on Linux os)
instead of netty NIO. |false
+|idleConnectionTimeout |Time in milliseconds that the server will allow a
channel to not receive requests from a client before it automatically closes.
If enabled, the value provided should typically exceed the amount of time given
to `keepAliveInterval`. Note that while this value is to be provided as
milliseconds it will resolve to second precision. Set this value to `0` to
disable this feature. |0
+|keepAliveInterval |Time in milliseconds that the server will allow a
channel to not send responses to a client before it sends a "ping" to see if it
is still present. If it is present, the client should respond with a "pong"
which will thus reset the `#idleConnectionTimeout` and keep the channel open.
If enabled, this number should be smaller than the value provided to the
`idleConnectionTimeout`. Note that while this value is to be provided as
milliseconds it will resolve to second precision. Set this value to `0` to
disable this feature. |0
--- End diff --
damn
> Support WebSockets ping/pong keep-alive in Gremlin server
> ---------------------------------------------------------
>
> Key: TINKERPOP-1726
> URL: https://issues.apache.org/jira/browse/TINKERPOP-1726
> Project: TinkerPop
> Issue Type: Improvement
> Components: server
> Affects Versions: 3.2.5
> Reporter: Andy Davidoff
> Priority: Major
>
> The ping/pong keep-alive system that is part of the WebSockets spec provides
> for successful identification of a dropped connection from either end of the
> connection.
> Currently, the Java client successfully issues keep-alive pings and receives
> pong replies from the server. Unfortunately, the server does not actively
> ping clients, nor does it discover and react to dead clients when keep-alive
> fails.
> This can cause pending client writes to lock up the server indefinitely when
> a client spontaneously disconnects.
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