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Configuring Connectors

Types of Connectors

Configuration Options

Setter

Description

acceptors

The number of thread dedicated to accepting incoming connections.

acceptQueueSize

Number of connection requests that can be queued up before the operating system starts to send rejections.

acceptorPriority

Sets the priority of the acceptor threads relative to the other threads.

confidentialPort

The port to redirect to if there is a security constraint of CONFIDENTIAL.

confidentialScheme

https by default

headerBufferSize

Set the size of the buffer to be used for request and response headers. An idle connection will at most have one buffer of this size allocated. Default is 4K.

host

The particular interface to listen on. If not set or 0.0.0.0, jetty will listen on port on all interfaces.

integralPort

The port to redirect to if there is a security constraint of INTEGRAL.

lowResourcesConnections

Set the number of connections, which if exceeded places this connector in a low resources state. This is not an exact measure as the connection count is averaged over the select sets. When in a low resources state, different idle timeouts can apply on connections (see lowResourcesMaxIdleTime).

lowResourcesMaxIdleTime

Set the period in ms that a connection is allowed to be idle when this there are more than lowResourcesConnections connections. This allows the server to rapidly close idle connections in order to gracefully handle high load situations.

maxIdleTime

Set the maximum Idle time for a connection, which roughly translates to the Socket.setSoTimeout(int) call, although with NIO implementations other mechanisms may be used to implement the timeout. The max idle time is applied: when waiting for a new request to be received on a connection; when reading the headers and content of a request; when writing the headers and content of a response. Jetty interprets this value as the maximum time between some progress being made on the connection. So if a single byte is read or written, then the timeout (if implemented by jetty) is reset. However, in many instances, the reading/writing is delegated to the JVM, and the semantic is more strictly enforced as the maximum time a single read/write operation can take. Note, that as Jetty supports writes of memory mapped file buffers, then a write may take many 10s of seconds for large content written to a slow device.

port

The port to listen on. See also host

requestBufferSize

Set the size of the content buffer for receiving requests. These buffers are only used for active connections that have requests with bodies that will not fit within the header buffer (see headerBufferSize). Default is 8K.

responseBufferSize

Set the size of the content buffer for sending responses. These buffers are only used for active connections that are sending responses with bodies that will not fit within the header buffer. Default is 32K.

resolveNames

If true, request IP addresses will be resolved to host names

reuseAddress

True if the the server socket will be opened in SO_REUSEADDR mode

Sets SO_LINGER on the connection socket. Disabled by default.

statsOn

If true, enables statistics collection on connections see Statistics

useDirectBuffers

For nio connectors, determines whether direct byte buffers will be used or not. The default is true.

threadPool

Sets the thread pool instance. By default this is the thread pool set on the org.mortbay.jetty.Server, and is a org.mortbay.thread.QueuedThreadPool instance.

Configuration Differences for Jetty 6

Setter

Description

delayedKeyUpdate

For non-blocking channels, whether or not the selection key is left in the select set whilst handling the io. If left in the select set it can be an optimization because frequently there will be more io to do. Default is true.

responseBufferSize

Set the size of the content buffer for sending responses. These buffers are only used for active connections that are sending responses with bodies that will not fit within the header buffer. Default is 24K.

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Contact the core Jetty developers at www.webtide.com
private support for your internal/customer projects ... custom extensions and distributions ... versioned snapshots for indefinite support ... scalability guidance for your apps and Ajax/Comet projects ... development services from 1 day to full product delivery