TO flyforlove(为情飞) :首先谢谢你对问题的帮助，但请你看好问题再和我讨论，我只回你一次！！为这个问题我已经开了N个帖子，撒几百的分，很多人连问题都不看就回复，如果以前的办法能解决，我何必来这里请教高人？想帮助别人是好事，但一定要有针对性，不然把帖子回复的很长，那些真懂的人看见很多回复，根本不会进来回答了，我希望就事论事，不要谈及其它什么胡闹等问题，如果你测试了，请问你是用我所室的版本下测试的吗？否则请测试完再告诉我，将不胜感激！
TO ljrong(along) :我从没说他们建议的配置有错，请你看好我的问题！！什么叫对症！TOMCAT5.5.1英文文档我们已经看了好几次，也许是没找到它说的问题关键，但至少没有发现解决的办法，至于其他的，如果你愿意，请搜索我的名字，看看回复我几个帖的情况，，，我一再强调我的server里没有context标签，可很多人连标题都不看就回复，我不知道如何评论这样的回复！我想我问题说的非常清楚，如果再不管为了解释问题去回复，真的不知道怎么说了，无论如何，谢谢你的关注，但如果不是讨论问题，请不要和我讨论题外问题吧，谢谢理解！
to urchinjj(懒刺猬) 用 yzh315(yzh)的方法你的1,2两个问题都可以解决,我就是这样用的,我的jsp与tomcat不在一个分区,使用http://localhost:8080显示的也是我自己的jsp页面,不是默认的那一个,我用的是Tomcat 5.0.25
TO ljrong(along) ( 首先谢谢你，但我要声明，我们从来没牛，因为知道自己不会，但解决不了问题，确实很着急，我的serve.xml文件内容如下：如果愿意，请加我的MSN:[email protected] <!-- Example Server Configuration File --> <!-- Note that component elements are nested corresponding to their parent-child relationships with each other --><!-- A "Server" is a singleton element that represents the entire JVM, which may contain one or more "Service" instances. The Server listens for a shutdown command on the indicated port. Note: A "Server" is not itself a "Container", so you may not define subcomponents such as "Valves" or "Loggers" at this level. --><Server port="8005" shutdown="SHUTDOWN" debug="0"> <!-- Comment these entries out to disable JMX MBeans support --> <!-- You may also configure custom components (e.g. Valves/Realms) by including your own mbean-descriptor file(s), and setting the "descriptors" attribute to point to a ';' seperated list of paths (in the ClassLoader sense) of files to add to the default list. e.g. descriptors="/com/myfirm/mypackage/mbean-descriptor.xml" --> <Listener className="org.apache.catalina.mbeans.ServerLifecycleListener" debug="0"/> <Listener className="org.apache.catalina.mbeans.GlobalResourcesLifecycleListener" debug="0"/> <!-- Global JNDI resources --> <GlobalNamingResources> <!-- Test entry for demonstration purposes --> <Environment name="simpleValue" type="java.lang.Integer" value="30"/> <!-- Editable user database that can also be used by UserDatabaseRealm to authenticate users --> <Resource name="UserDatabase" auth="Container" type="org.apache.catalina.UserDatabase" description="User database that can be updated and saved" factory="org.apache.catalina.users.MemoryUserDatabaseFactory" pathname="conf/tomcat-users.xml" /> </GlobalNamingResources> <!-- A "Service" is a collection of one or more "Connectors" that share a single "Container" (and therefore the web applications visible within that Container). Normally, that Container is an "Engine", but this is not required. Note: A "Service" is not itself a "Container", so you may not define subcomponents such as "Valves" or "Loggers" at this level. --> <!-- Define the Tomcat Stand-Alone Service --> <Service name="Catalina"> <!-- A "Connector" represents an endpoint by which requests are received and responses are returned. Each Connector passes requests on to the associated "Container" (normally an Engine) for processing. By default, a non-SSL HTTP/1.1 Connector is established on port 8080. You can also enable an SSL HTTP/1.1 Connector on port 8443 by following the instructions below and uncommenting the second Connector entry. SSL support requires the following steps (see the SSL Config HOWTO in the Tomcat 5 documentation bundle for more detailed instructions): * If your JDK version 1.3 or prior, download and install JSSE 1.0.2 or later, and put the JAR files into "$JAVA_HOME/jre/lib/ext". * Execute: %JAVA_HOME%\bin\keytool -genkey -alias tomcat -keyalg RSA (Windows) $JAVA_HOME/bin/keytool -genkey -alias tomcat -keyalg RSA (Unix) with a password value of "changeit" for both the certificate and the keystore itself. By default, DNS lookups are enabled when a web application calls request.getRemoteHost(). This can have an adverse impact on performance, so you can disable it by setting the "enableLookups" attribute to "false". When DNS lookups are disabled, request.getRemoteHost() will return the String version of the IP address of the remote client. -->
<!-- Define a non-SSL HTTP/1.1 Connector on port 8080 --> <Connector port="8080" maxThreads="150" minSpareThreads="25" maxSpareThreads="75" enableLookups="false" redirectPort="8443" acceptCount="100" debug="0" connectionTimeout="20000" disableUploadTimeout="true" /> <!-- Note : To disable connection timeouts, set connectionTimeout value to 0 -->
<!-- Note : To use gzip compression you could set the following properties :
compression="on" compressionMinSize="2048" noCompressionUserAgents="gozilla, traviata" compressableMimeType="text/html,text/xml" --> <!-- Define a SSL HTTP/1.1 Connector on port 8443 --> <!-- <Connector port="8443" maxThreads="150" minSpareThreads="25" maxSpareThreads="75" enableLookups="false" disableUploadTimeout="true" acceptCount="100" debug="0" scheme="https" secure="true" clientAuth="false" sslProtocol="TLS" /> --> <!-- Define an AJP 1.3 Connector on port 8009 --> <Connector port="8009" enableLookups="false" redirectPort="8443" debug="0" protocol="AJP/1.3" /> <!-- Define a Proxied HTTP/1.1 Connector on port 8082 --> <!-- See proxy documentation for more information about using this. --> <!-- <Connector port="8082" maxThreads="150" minSpareThreads="25" maxSpareThreads="75" enableLookups="false" acceptCount="100" debug="0" connectionTimeout="20000" proxyPort="80" disableUploadTimeout="true" /> --> <!-- An Engine represents the entry point (within Catalina) that processes every request. The Engine implementation for Tomcat stand alone analyzes the HTTP headers included with the request, and passes them on to the appropriate Host (virtual host). --> <!-- You should set jvmRoute to support load-balancing via AJP ie : <Engine name="Standalone" defaultHost="localhost" debug="0" jvmRoute="jvm1"> -->
<!-- Define the top level container in our container hierarchy --> <Engine name="Catalina" defaultHost="localhost" debug="0"> <!-- The request dumper valve dumps useful debugging information about the request headers and cookies that were received, and the response headers and cookies that were sent, for all requests received by this instance of Tomcat. If you care only about requests to a particular virtual host, or a particular application, nest this element inside the corresponding <Host> or <Context> entry instead. For a similar mechanism that is portable to all Servlet 2.4 containers, check out the "RequestDumperFilter" Filter in the example application (the source for this filter may be found in "$CATALINA_HOME/webapps/examples/WEB-INF/classes/filters"). Request dumping is disabled by default. Uncomment the following element to enable it. --> <!-- <Valve className="org.apache.catalina.valves.RequestDumperValve"/> --> <!-- Because this Realm is here, an instance will be shared globally --> <!-- This Realm uses the UserDatabase configured in the global JNDI resources under the key "UserDatabase". Any edits that are performed against this UserDatabase are immediately available for use by the Realm. --> <Realm className="org.apache.catalina.realm.UserDatabaseRealm" debug="0" resourceName="UserDatabase"/> <!-- Comment out the old realm but leave here for now in case we need to go back quickly --> <!-- <Realm className="org.apache.catalina.realm.MemoryRealm" /> --> <!-- Replace the above Realm with one of the following to get a Realm stored in a database and accessed via JDBC -->
to urchinjj(懒刺猬) 你有可能已经把server.xml改坏了，你重新安装一次tomcat试一下，我没有用MSN，你用QQ吗？我的QQ号是286737731，欢迎讨论，:)
Context path="" docBase="E:\jia" debug="0" reloadable="true" crossContext="true"/>, <!-- Defines a cluster for this node, By defining this element, means that every manager will be changed. So when running a cluster, only make sure that you have webapps in there that need to be clustered and remove the other ones. A cluster has the following parameters: className = the fully qualified name of the cluster class name = a descriptive name for your cluster, can be anything debug = the debug level, higher means more output mcastAddr = the multicast address, has to be the same for all the nodes mcastPort = the multicast port, has to be the same for all the nodes
mcastBindAddr = bind the multicast socket to a specific address
mcastTTL = the multicast TTL if you want to limit your broadcast
mcastSoTimeout = the multicast readtimeout mcastFrequency = the number of milliseconds in between sending a "I'm alive" heartbeat mcastDropTime = the number a milliseconds before a node is considered "dead" if no heartbeat is received tcpThreadCount = the number of threads to handle incoming replication requests, optimal would be the same amount of threads as nodes tcpListenAddress = the listen address (bind address) for TCP cluster request on this host, in case of multiple ethernet cards. auto means that address becomes InetAddress.getLocalHost().getHostAddress() tcpListenPort = the tcp listen port tcpSelectorTimeout = the timeout (ms) for the Selector.select() method in case the OS has a wakup bug in java.nio. Set to 0 for no timeout printToScreen = true means that managers will also print to std.out expireSessionsOnShutdown = true means that useDirtyFlag = true means that we only replicate a session after setAttribute,removeAttribute has been called. false means to replicate the session after each request. false means that replication would work for the following piece of code: <% HashMap map = (HashMap)session.getAttribute("map"); map.put("key","value"); %> replicationMode = can be either 'pooled', 'synchronous' or 'asynchronous'. * Pooled means that the replication happens using several sockets in a synchronous way. Ie, the data gets replicated, then the request return. This is the same as the 'synchronous' setting except it uses a pool of sockets, hence it is multithreaded. This is the fastest and safest configuration. To use this, also increase the nr of tcp threads that you have dealing with replication. * Synchronous means that the thread that executes the request, is also the thread the replicates the data to the other nodes, and will not return until all nodes have received the information. * Asynchronous means that there is a specific 'sender' thread for each cluster node, so the request thread will queue the replication request into a "smart" queue, and then return to the client. The "smart" queue is a queue where when a session is added to the queue, and the same session already exists in the queue from a previous request, that session will be replaced in the queue instead of replicating two requests. This almost never happens, unless there is a large network delay. -->
<!-- When configuring for clustering, you also add in a valve to catch all the requests coming in, at the end of the request, the session may or may not be replicated. A session is replicated if and only if all the conditions are met: 1. useDirtyFlag is true or setAttribute or removeAttribute has been called AND 2. a session exists (has been created) 3. the request is not trapped by the "filter" attribute The filter attribute is to filter out requests that could not modify the session, hence we don't replicate the session after the end of this request. The filter is negative, ie, anything you put in the filter, you mean to filter out, ie, no replication will be done on requests that match one of the filters. The filter attribute is delimited by ;, so you can't escape out ; even if you wanted to. filter=".*\.gif;.*\.js;" means that we will not replicate the session after requests with the URI ending with .gif and .js are intercepted.
The deployer element can be used to deploy apps cluster wide. Currently the deployment only deploys/undeploys to working members in the cluster so no WARs are copied upons startup of a broken node. The deployer watches a directory (watchDir) for WAR files when watchEnabled="true" When a new war file is added the war gets deployed to the local instance, and then deployed to the other instances in the cluster. When a war file is deleted from the watchDir the war is undeployed locally and cluster wide -->
<Deployer className="org.apache.catalina.cluster.deploy.FarmWarDeployer" tempDir="/tmp/war-temp/" deployDir="/tmp/war-deploy/" watchDir="/tmp/war-listen/" watchEnabled="false"/> </Cluster> --> <!-- Normally, users must authenticate themselves to each web app individually. Uncomment the following entry if you would like a user to be authenticated the first time they encounter a resource protected by a security constraint, and then have that user identity maintained across *all* web applications contained in this virtual host. --> <!-- <Valve className="org.apache.catalina.authenticator.SingleSignOn" debug="0"/> --> <!-- Access log processes all requests for this virtual host. By default, log files are created in the "logs" directory relative to $CATALINA_HOME. If you wish, you can specify a different directory with the "directory" attribute. Specify either a relative (to $CATALINA_HOME) or absolute path to the desired directory. --> <!-- <Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs" prefix="localhost_access_log." suffix=".txt" pattern="common" resolveHosts="false"/> --> </Host> </Engine> </Service></Server>
appBase="D:/developer/jakarta-tomcat-5.5.1/webapps/ROOT"
unpackWARs="true" autoDeploy="true"
xmlValidation="false" xmlNamespaceAware="false">
然后再其后面加上一句
<Context path="" docBase="E:\JIA" debug="5" reloadable="true" crossContext="true">
</Context> 这样的话默认输入http://localhost:8080就可以显示你自己的webapp了，还有为了更加清晰的设置各个webapp，从tomcat5以后，都可以在%tomcat_home%\conf\Catalina\localhost目录下创建自己的webapp配置文件，不用都去server.xml中创建更改了。
本人也是这样做的!
而且本人的一个tomcat启动两个不同的web服务(都是根目录,访问端口不同,分别人8080和8888),每个服务连接数据连接池也不一样.....
<!-- Tomcat Examples Context -->
<Context path="/examples" docBase="examples" debug="0"
reloadable="true" crossContext="true"><Context path="/fly" docBase="E:\JIA " debug="0"
reloadable="true" crossContext="true">在此处设了虚拟目录fly,对应的实际目录E:\JIA ,实际目录存放你的jsp文件，以后要执行这些jsp文件，要先启动
Tomcat,然后打开IE,在地址兰输入：http://localhost:8080/fly 即可
只不过tomcat5以后都可以分别建立xml文件进行设置，比较清晰，上面我已经说了。
Catalina--|
localhost--|
manager.xml------手动加过context标签，没用
增加一个xml文件，如JIA.xml
内容：<?xml version='1.0' encoding='utf-8'?>
<Context docBase="E:/JIA" path="/JIA" privileged="true" workDir="work\Catalina\localhost\test">
</Context>就可以用：http://127.0.0.1:8080/JIA 访问了
楼主如果配置有问题不能简单地说不行，
请仔细查看tomcat控制台的出错信息，以确认问题出在哪里。
如果你不相信别人，你自己去看tomcat的文档好了，所有的配置上面写的很清楚，
这样基本的问题还来问，你是不是要大家手把手教给你，你才能明白怎么回事。
也同意 ljrong(along) 的说法,urchinjj(懒刺猬),你自己看不明白而已
用 yzh315(yzh)的方法你的1,2两个问题都可以解决,我就是这样用的,我的jsp与tomcat不在一个分区,使用http://localhost:8080显示的也是我自己的jsp页面,不是默认的那一个,我用的是Tomcat 5.0.25
在Tomcat 5.0\conf\Catalina\localhost下面添加JIA.xml,内容如下:<?xml version='1.0' encoding='utf-8'?>
<Context docBase="e:/JIA" path="/" reloadable="true">
</Context>然后重新启动你的tomcat,我测试过了,绝对可行,你的1,2两个问题都可以解决
刚下载tomcat5.5,按上面方法随便配就可以了,不知你怎么搞的.受不了!!把你的server.xml公布一下吧,别犯低别错误还牛气十足!!!!
<Context docBase="e:/jia" path="/" reloadable="true">
</Context > 然后关机，重新启动机器，启动TOMCAT，打开IE，打如：localhost：8080 依然显示TOMCAT默认网页我的E盘目录：
e;\jia
|
WEB-INF
index.jspindex.jsp 上只有一句话，为了测试是否方法可行如果你愿意请加我的MSN；[email protected]虽然问题没解决，谢谢你的关注和认真，我们这个项目是个国际项目，但并不是主要做程序开发，所以开发程序方面不是强项，但程序又是不可少的，所以非常希望得到大家的帮助，等项目结束，我会告诉帮助过我的朋友，我相信大家不会后悔如果我哪里得罪了大家，请原谅，，但我很着急
<!-- Example Server Configuration File -->
<!-- Note that component elements are nested corresponding to their
parent-child relationships with each other --><!-- A "Server" is a singleton element that represents the entire JVM,
which may contain one or more "Service" instances. The Server
listens for a shutdown command on the indicated port. Note: A "Server" is not itself a "Container", so you may not
define subcomponents such as "Valves" or "Loggers" at this level.
--><Server port="8005" shutdown="SHUTDOWN" debug="0">
<!-- Comment these entries out to disable JMX MBeans support -->
<!-- You may also configure custom components (e.g. Valves/Realms) by
including your own mbean-descriptor file(s), and setting the
"descriptors" attribute to point to a ';' seperated list of paths
(in the ClassLoader sense) of files to add to the default list.
e.g. descriptors="/com/myfirm/mypackage/mbean-descriptor.xml"
-->
<Listener className="org.apache.catalina.mbeans.ServerLifecycleListener"
debug="0"/>
<Listener className="org.apache.catalina.mbeans.GlobalResourcesLifecycleListener"
debug="0"/> <!-- Global JNDI resources -->
<GlobalNamingResources> <!-- Test entry for demonstration purposes -->
<Environment name="simpleValue" type="java.lang.Integer" value="30"/> <!-- Editable user database that can also be used by
UserDatabaseRealm to authenticate users -->
<Resource name="UserDatabase" auth="Container"
type="org.apache.catalina.UserDatabase"
description="User database that can be updated and saved"
factory="org.apache.catalina.users.MemoryUserDatabaseFactory"
pathname="conf/tomcat-users.xml" /> </GlobalNamingResources> <!-- A "Service" is a collection of one or more "Connectors" that share
a single "Container" (and therefore the web applications visible
within that Container). Normally, that Container is an "Engine",
but this is not required. Note: A "Service" is not itself a "Container", so you may not
define subcomponents such as "Valves" or "Loggers" at this level.
--> <!-- Define the Tomcat Stand-Alone Service -->
<Service name="Catalina"> <!-- A "Connector" represents an endpoint by which requests are received
and responses are returned. Each Connector passes requests on to the
associated "Container" (normally an Engine) for processing. By default, a non-SSL HTTP/1.1 Connector is established on port 8080.
You can also enable an SSL HTTP/1.1 Connector on port 8443 by
following the instructions below and uncommenting the second Connector
entry. SSL support requires the following steps (see the SSL Config
HOWTO in the Tomcat 5 documentation bundle for more detailed
instructions):
* If your JDK version 1.3 or prior, download and install JSSE 1.0.2 or
later, and put the JAR files into "$JAVA_HOME/jre/lib/ext".
* Execute:
%JAVA_HOME%\bin\keytool -genkey -alias tomcat -keyalg RSA (Windows)
$JAVA_HOME/bin/keytool -genkey -alias tomcat -keyalg RSA (Unix)
with a password value of "changeit" for both the certificate and
the keystore itself. By default, DNS lookups are enabled when a web application calls
request.getRemoteHost(). This can have an adverse impact on
performance, so you can disable it by setting the
"enableLookups" attribute to "false". When DNS lookups are disabled,
request.getRemoteHost() will return the String version of the
IP address of the remote client.
-->
<Connector port="8080"
maxThreads="150" minSpareThreads="25" maxSpareThreads="75"
enableLookups="false" redirectPort="8443" acceptCount="100"
debug="0" connectionTimeout="20000"
disableUploadTimeout="true" />
<!-- Note : To disable connection timeouts, set connectionTimeout value
to 0 -->
<!-- Note : To use gzip compression you could set the following properties :
compression="on"
compressionMinSize="2048"
noCompressionUserAgents="gozilla, traviata"
compressableMimeType="text/html,text/xml"
--> <!-- Define a SSL HTTP/1.1 Connector on port 8443 -->
<!--
<Connector port="8443"
maxThreads="150" minSpareThreads="25" maxSpareThreads="75"
enableLookups="false" disableUploadTimeout="true"
acceptCount="100" debug="0" scheme="https" secure="true"
clientAuth="false" sslProtocol="TLS" />
--> <!-- Define an AJP 1.3 Connector on port 8009 -->
<Connector port="8009"
enableLookups="false" redirectPort="8443" debug="0"
protocol="AJP/1.3" /> <!-- Define a Proxied HTTP/1.1 Connector on port 8082 -->
<!-- See proxy documentation for more information about using this. -->
<!--
<Connector port="8082"
maxThreads="150" minSpareThreads="25" maxSpareThreads="75"
enableLookups="false"
acceptCount="100" debug="0" connectionTimeout="20000"
proxyPort="80" disableUploadTimeout="true" />
--> <!-- An Engine represents the entry point (within Catalina) that processes
every request. The Engine implementation for Tomcat stand alone
analyzes the HTTP headers included with the request, and passes them
on to the appropriate Host (virtual host). --> <!-- You should set jvmRoute to support load-balancing via AJP ie :
<Engine name="Standalone" defaultHost="localhost" debug="0" jvmRoute="jvm1">
-->
<!-- Define the top level container in our container hierarchy -->
<Engine name="Catalina" defaultHost="localhost" debug="0"> <!-- The request dumper valve dumps useful debugging information about
the request headers and cookies that were received, and the response
headers and cookies that were sent, for all requests received by
this instance of Tomcat. If you care only about requests to a
particular virtual host, or a particular application, nest this
element inside the corresponding <Host> or <Context> entry instead. For a similar mechanism that is portable to all Servlet 2.4
containers, check out the "RequestDumperFilter" Filter in the
example application (the source for this filter may be found in
"$CATALINA_HOME/webapps/examples/WEB-INF/classes/filters"). Request dumping is disabled by default. Uncomment the following
element to enable it. -->
<!--
<Valve className="org.apache.catalina.valves.RequestDumperValve"/>
--> <!-- Because this Realm is here, an instance will be shared globally --> <!-- This Realm uses the UserDatabase configured in the global JNDI
resources under the key "UserDatabase". Any edits
that are performed against this UserDatabase are immediately
available for use by the Realm. -->
<Realm className="org.apache.catalina.realm.UserDatabaseRealm"
debug="0" resourceName="UserDatabase"/> <!-- Comment out the old realm but leave here for now in case we
need to go back quickly -->
<!--
<Realm className="org.apache.catalina.realm.MemoryRealm" />
--> <!-- Replace the above Realm with one of the following to get a Realm
stored in a database and accessed via JDBC -->
你有可能已经把server.xml改坏了，你重新安装一次tomcat试一下，我没有用MSN，你用QQ吗？我的QQ号是286737731，欢迎讨论，:)
<!--
<Realm className="org.apache.catalina.realm.JDBCRealm" debug="99"
driverName="org.gjt.mm.mysql.Driver"
connectionURL="jdbc:mysql://localhost/authority"
connectionName="test" connectionPassword="test"
userTable="users" userNameCol="user_name" userCredCol="user_pass"
userRoleTable="user_roles" roleNameCol="role_name" />
--> <!--
<Realm className="org.apache.catalina.realm.JDBCRealm" debug="99"
driverName="oracle.jdbc.driver.OracleDriver"
connectionURL="jdbc:oracle:thin:@ntserver:1521:ORCL"
connectionName="scott" connectionPassword="tiger"
userTable="users" userNameCol="user_name" userCredCol="user_pass"
userRoleTable="user_roles" roleNameCol="role_name" />
--> <!--
<Realm className="org.apache.catalina.realm.JDBCRealm" debug="99"
driverName="sun.jdbc.odbc.JdbcOdbcDriver"
connectionURL="jdbc:odbc:CATALINA"
userTable="users" userNameCol="user_name" userCredCol="user_pass"
userRoleTable="user_roles" roleNameCol="role_name" />
--> <!-- Define the default virtual host
Note: XML Schema validation will not work with Xerces 2.2.
-->
<Host name="localhost" debug="0" appBase="webapps"
unpackWARs="true" autoDeploy="true"
xmlValidation="false" xmlNamespaceAware="false">
Context path="" docBase="E:\jia" debug="0" reloadable="true" crossContext="true"/>,
<!-- Defines a cluster for this node,
By defining this element, means that every manager will be changed.
So when running a cluster, only make sure that you have webapps in there
that need to be clustered and remove the other ones.
A cluster has the following parameters: className = the fully qualified name of the cluster class name = a descriptive name for your cluster, can be anything debug = the debug level, higher means more output mcastAddr = the multicast address, has to be the same for all the nodes mcastPort = the multicast port, has to be the same for all the nodes
mcastBindAddr = bind the multicast socket to a specific address
mcastTTL = the multicast TTL if you want to limit your broadcast
mcastSoTimeout = the multicast readtimeout mcastFrequency = the number of milliseconds in between sending a "I'm alive" heartbeat mcastDropTime = the number a milliseconds before a node is considered "dead" if no heartbeat is received tcpThreadCount = the number of threads to handle incoming replication requests, optimal would be the same amount of threads as nodes tcpListenAddress = the listen address (bind address) for TCP cluster request on this host,
in case of multiple ethernet cards.
auto means that address becomes
InetAddress.getLocalHost().getHostAddress() tcpListenPort = the tcp listen port tcpSelectorTimeout = the timeout (ms) for the Selector.select() method in case the OS
has a wakup bug in java.nio. Set to 0 for no timeout printToScreen = true means that managers will also print to std.out expireSessionsOnShutdown = true means that useDirtyFlag = true means that we only replicate a session after setAttribute,removeAttribute has been called.
false means to replicate the session after each request.
false means that replication would work for the following piece of code:
<%
HashMap map = (HashMap)session.getAttribute("map");
map.put("key","value");
%>
replicationMode = can be either 'pooled', 'synchronous' or 'asynchronous'.
* Pooled means that the replication happens using several sockets in a synchronous way. Ie, the data gets replicated, then the request return. This is the same as the 'synchronous' setting except it uses a pool of sockets, hence it is multithreaded. This is the fastest and safest configuration. To use this, also increase the nr of tcp threads that you have dealing with replication.
* Synchronous means that the thread that executes the request, is also the
thread the replicates the data to the other nodes, and will not return until all
nodes have received the information.
* Asynchronous means that there is a specific 'sender' thread for each cluster node,
so the request thread will queue the replication request into a "smart" queue,
and then return to the client.
The "smart" queue is a queue where when a session is added to the queue, and the same session
already exists in the queue from a previous request, that session will be replaced
in the queue instead of replicating two requests. This almost never happens, unless there is a
large network delay.
-->
When configuring for clustering, you also add in a valve to catch all the requests
coming in, at the end of the request, the session may or may not be replicated.
A session is replicated if and only if all the conditions are met:
1. useDirtyFlag is true or setAttribute or removeAttribute has been called AND
2. a session exists (has been created)
3. the request is not trapped by the "filter" attribute The filter attribute is to filter out requests that could not modify the session,
hence we don't replicate the session after the end of this request.
The filter is negative, ie, anything you put in the filter, you mean to filter out,
ie, no replication will be done on requests that match one of the filters.
The filter attribute is delimited by ;, so you can't escape out ; even if you wanted to. filter=".*\.gif;.*\.js;" means that we will not replicate the session after requests with the URI
ending with .gif and .js are intercepted.
The deployer element can be used to deploy apps cluster wide.
Currently the deployment only deploys/undeploys to working members in the cluster
so no WARs are copied upons startup of a broken node.
The deployer watches a directory (watchDir) for WAR files when watchEnabled="true"
When a new war file is added the war gets deployed to the local instance,
and then deployed to the other instances in the cluster.
When a war file is deleted from the watchDir the war is undeployed locally
and cluster wide
-->
<!--
<Cluster className="org.apache.catalina.cluster.tcp.SimpleTcpCluster"
managerClassName="org.apache.catalina.cluster.session.DeltaManager"
expireSessionsOnShutdown="false"
useDirtyFlag="true"> <Membership
className="org.apache.catalina.cluster.mcast.McastService"
mcastAddr="228.0.0.4"
mcastPort="45564"
mcastFrequency="500"
mcastDropTime="3000"/> <Receiver
className="org.apache.catalina.cluster.tcp.ReplicationListener"
tcpListenAddress="auto"
tcpListenPort="4001"
tcpSelectorTimeout="100"
tcpThreadCount="6"/> <Sender
className="org.apache.catalina.cluster.tcp.ReplicationTransmitter"
replicationMode="pooled"/> <Valve className="org.apache.catalina.cluster.tcp.ReplicationValve"
filter=".*\.gif;.*\.js;.*\.jpg;.*\.htm;.*\.html;.*\.txt;"/>
<Deployer className="org.apache.catalina.cluster.deploy.FarmWarDeployer"
tempDir="/tmp/war-temp/"
deployDir="/tmp/war-deploy/"
watchDir="/tmp/war-listen/"
watchEnabled="false"/>
</Cluster>
--> <!-- Normally, users must authenticate themselves to each web app
individually. Uncomment the following entry if you would like
a user to be authenticated the first time they encounter a
resource protected by a security constraint, and then have that
user identity maintained across *all* web applications contained
in this virtual host. -->
<!--
<Valve className="org.apache.catalina.authenticator.SingleSignOn"
debug="0"/>
--> <!-- Access log processes all requests for this virtual host. By
default, log files are created in the "logs" directory relative to
$CATALINA_HOME. If you wish, you can specify a different
directory with the "directory" attribute. Specify either a relative
(to $CATALINA_HOME) or absolute path to the desired directory.
-->
<!--
<Valve className="org.apache.catalina.valves.AccessLogValve"
directory="logs" prefix="localhost_access_log." suffix=".txt"
pattern="common" resolveHosts="false"/>
--> </Host> </Engine> </Service></Server>