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  • 
    The Apache Tomcat Servlet/JSP Container

    十三水大小王:Apache Tomcat 7

    Version 7.0.68, Feb 8 2016
    Apache Logo

    qq游戏里有十三水这个游戏吗 www.tdgb.net Links

    Top Level Elements

    Executors

    Connectors

    Containers

    Nested Components

    Cluster Elements

    web.xml

    Other

    The Cluster Membership object

    Table of Contents
    Introduction

    The membership component in the Apache Tribes Channel is responsible for dynamic discovery of other members(nodes) in the cluster.

    Default Implementation

    The default implementation of the cluster group notification is built on top of multicast heartbeats sent using UDP packets to a multicast IP address. Cluster members are grouped together by using the same multicast address/port combination. Each member sends out a heartbeat with a given interval (frequency), and this heartbeat is used for dynamic discovery. In a similar fashion, if a heartbeat has not been received in a timeframe specified by dropTime ms. a member is considered suspect and the channel and any membership listener will be notified.

    Attributes
    Multicast Attributes
    AttributeDescription
    className

    The default value is org.apache.catalina.tribes.membership.McastService and is currently the only implementation. This implementation uses multicast heartbeats for member discovery.

    address

    The multicast address that the membership will broadcast its presence and listen for other heartbeats on. The default value is 228.0.0.4 Make sure your network is enabled for multicast traffic.
    The multicast address, in conjunction with the port is what creates a cluster group. To divide up your farm into several different group, or to split up QA from production, change the port or the address
    Previously known as mcastAddr.

    port

    The multicast port, the default value is 45564
    The multicast port, in conjunction with the address is what creates a cluster group. To divide up your farm into several different group, or to split up QA from production, change the port or the address

    frequency

    The frequency in milliseconds in which heartbeats are sent out. The default value is 500 ms.
    In most cases the default value is sufficient. Changing this value, simply changes the interval in between heartbeats.

    dropTime

    The membership component will time out members and notify the Channel if a member fails to send a heartbeat within a give time. The default value is 3000 ms. This means, that if a heartbeat is not received from a member in that timeframe, the membership component will notify the cluster of this.
    On a high latency network you may wish to increase this value, to protect against false positives.
    Apache Tribes also provides a TcpFailureDetector that will verify a timeout using a TCP connection when a heartbeat timeout has occurred. This protects against false positives.

    bind

    Use this attribute if you wish to bind your multicast traffic to a specific network interface. By default, or when this attribute is unset, it tries to bind to 0.0.0.0 and sometimes on multihomed hosts this becomes a problem.

    ttl

    The time-to-live setting for the multicast heartbeats. This setting should be a value between 0 and 255. The default value is VM implementation specific.

    domain

    Apache Tribes has the ability to logically group members into domains, by using this domain attribute. The org.apache.catalina.tribes.Member.getDomain() method returns the value specified here.

    soTimeout

    The sending and receiving of heartbeats is done on a single thread, hence to avoid blocking this thread forever, you can control the SO_TIMEOUT value on this socket.
    If a value smaller or equal to 0 is presented, the code will default this value to frequency

    recoveryEnabled

    In case of a network failure, Java multicast socket don't transparently fail over, instead the socket will continuously throw IOException upon each receive request. When recoveryEnabled is set to true, this will close the multicast socket and open a new socket with the same properties as defined above.
    The default is true.

    recoveryCounter

    When recoveryEnabled==true this value indicates how many times an error has to occur before recovery is attempted. The default is 10.

    recoverySleepTime

    When recoveryEnabled==true this value indicates how long time (in milliseconds) the system will sleep in between recovery attempts, until it recovers successfully. The default is 5000 (5 seconds).

    localLoopbackDisabled

    Membership uses multicast, it will call java.net.MulticastSocket.setLoopbackMode(localLoopbackDisabled). When localLoopbackDisabled==true multicast messages will not reach other nodes on the same local machine. The default is false.

    Comments

    Notice: This comments section collects your suggestions on improving documentation for Apache Tomcat.

    If you have trouble and need help, read Find Help page and ask your question on the tomcat-users qq游戏里有十三水这个游戏吗. Do not ask such questions here. This is not a Q&A section.

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    Copyright © 1999-2016, Apache Software Foundation
  • 人民网舆情分析专家:韩长青 2019-10-15
  • 陕北共产党发起人——李子洲 2019-10-15
  • 迈向命运共同体 开创亚洲新未来 2019-10-11
  • 北京市永定门奥迪中心4S店【在线咨询】 2019-10-11
  • 我发现从五+年代农业用化肥农药,在六+年代几百年长的柿树几乎死光。没人研究! 2019-10-10
  • 游戏成瘾是精神疾病!快看你有没有这些症状 2019-10-10
  • 乌鲁木齐市社会保险管理局社保工作人员开贴,在线解答社 2019-10-02
  • 江西省“放管服”改革再出实招 2019-10-01
  • 抚州发现“一代布王”李璟禧故居 2019-10-01
  • 钱江晚报:火锅店被吃垮,实际是信任破产 2019-09-23
  • 新疆网违法和不良信息举报受理和处置管理办法 2019-09-23
  • 水费欠账竟“穿越”16年?用户质疑:为何没见催缴过? 2019-09-11
  • 青海学习十九大精神嵌套页面--青海频道--人民网 2019-09-11
  • 图片报道:江西省峡江县举行公共租赁住房钥匙发放仪式 2019-09-09
  • 机器人正在敲响未来生活的“大门” 2019-09-09
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