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From Smith Hua <smith....@zoom.us>
Subject Re[2]: FW: tomcat 8080 thread not reduced
Date Mon, 16 Jan 2017 02:41:34 GMT

actually there is not much busy threads, less tahn 10,so i think this parameter may has nothing
to do with this
--
从myMail的Android专用app所发送 星期一, 16 一月 2017, 03:01上午 +08:00 发件人
André Warnier (tomcat)  aw@ice-sa.com :

>Hi.
>
>I can find nothing really wrong in your configuration below.
>But, what happens if in this section :
>
> >      <Connector port="8080" protocol="HTTP/1.1"
> >                 maxThreads="300" connectionTimeout="20000"
> >                 redirectPort="8443" />
>
>you change the connectionTimeout to 3000 (= 3 seconds, instead of the above 20 seconds)
?
>
>Do you still see the number of threads remaining at the maximum ?
>
>See :  http://tomcat.apache.org/tomcat-8.0-doc/config/http.html#Standard_Implementation
>--> connectionTimeout
>and the fact that it is also the default for
>keepAliveTimeout
>
>
>On 14.01.2017 07:30, smith wrote:
>> The server.xml:
>>
>> <?xml version='1.0' encoding='utf-8'?>
>> <!--
>>    Licensed to the Apache Software Foundation (ASF) under one or more
>>    contributor license agreements.  See the NOTICE file distributed with
>>    this work for additional information regarding copyright ownership.
>>    The ASF licenses this file to You under the Apache License, Version 2.0
>>    (the "License"); you may not use this file except in compliance with
>>    the License.  You may obtain a copy of the License at
>>
>>  http://www.apache.org/licenses/LICENSE-2.0
>>
>>    Unless required by applicable law or agreed to in writing, software
>>    distributed under the License is distributed on an "AS IS" BASIS,
>>    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
>>    See the License for the specific language governing permissions and
>>    limitations under the License.
>> -->
>> <!-- Note:  A "Server" is not itself a "Container", so you may not
>>       define subcomponents such as "Valves" at this level.
>>       Documentation at /docs/config/server.html
>>   -->
>> <Server port="8005" shutdown="SHUTDOWN">
>>    <Listener className="org.apache.catalina.startup.VersionLoggerListener" />
>>    <!-- Security listener. Documentation at /docs/config/listeners.html
>>    <Listener className="org.apache.catalina.security.SecurityListener" />
>>    -->
>>    <!--APR library loader. Documentation at /docs/apr.html -->
>>    <Listener className="org.apache.catalina.core.AprLifecycleListener" SSLEngine="on"
/>
>>    <!-- Prevent memory leaks due to use of particular java/javax APIs-->
>>    <Listener className="org.apache.catalina.core.JreMemoryLeakPreventionListener"
/>
>>    <Listener className="org.apache.catalina.mbeans.GlobalResourcesLifecycleListener"
/>
>>    <Listener className="org.apache.catalina.core.ThreadLocalLeakPreventionListener"
/>
>>
>>    <!-- Global JNDI resources
>>         Documentation at /docs/jndi-resources-howto.html
>>    -->
>>    <GlobalNamingResources>
>>      <!-- 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" Note:  A "Service" is not itself a "Container",
>>         so you may not define subcomponents such as "Valves" at this level.
>>         Documentation at /docs/config/service.html
>>     -->
>>    <Service name="Catalina">
>>
>>      <!--The connectors can use a shared executor, you can define one or more
named thread pools-->
>>      <!--
>>      <Executor name="tomcatThreadPool" namePrefix="catalina-exec-"
>>          maxThreads="150" minSpareThreads="4"/>
>>      -->
>>
>>
>>      <!-- A "Connector" represents an endpoint by which requests are received
>>           and responses are returned. Documentation at :
>>           Java HTTP Connector: /docs/config/http.html (blocking & non-blocking)
>>           Java AJP  Connector: /docs/config/ajp.html
>>           APR (HTTP/AJP) Connector: /docs/apr.html
>>           Define a non-SSL HTTP/1.1 Connector on port 8080
>>      -->
>>      <Connector port="8080" protocol="HTTP/1.1"
>>                 maxThreads="300" connectionTimeout="20000"
>>                 redirectPort="8443" />
>>      <!-- A "Connector" using the shared thread pool-->
>>      <!--
>>      <Connector executor="tomcatThreadPool"
>>                 port="8080" protocol="HTTP/1.1"
>>                 connectionTimeout="20000"
>>                 redirectPort="8443" />
>>      -->
>>      <!-- Define a SSL HTTP/1.1 Connector on port 8443
>>           This connector uses the NIO implementation that requires the JSSE
>>           style configuration. When using the APR/native implementation, the
>>           OpenSSL style configuration is required as described in the APR/native
>>           documentation -->
>>      <!--
>>      <Connector port="8443" protocol="org.apache.coyote.http11.Http11NioProtocol"
>>                 maxThreads="150" SSLEnabled="true" scheme="https" secure="true"
>>                 clientAuth="false" sslProtocol="TLS" />
>>      -->
>>
>>      <!-- Define an AJP 1.3 Connector on port 8009 -->
>>      <Connector port="8009" protocol="AJP/1.3" redirectPort="8443" />
>>
>>
>>      <!-- 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).
>>           Documentation at /docs/config/engine.html -->
>>
>>      <!-- You should set jvmRoute to support load-balancing via AJP ie :
>>      <Engine name="Catalina" defaultHost="localhost" jvmRoute="jvm1">
>>      -->
>>      <Engine name="Catalina" defaultHost="localhost">
>>
>>        <!--For clustering, please take a look at documentation at:
>>            /docs/cluster-howto.html  (simple how to)
>>            /docs/config/cluster.html (reference documentation) -->
>>        <!--
>>        <Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster"/>
>>        -->
>>
>>        <!-- Use the LockOutRealm to prevent attempts to guess user passwords
>>             via a brute-force attack -->
>>        <Realm className="org.apache.catalina.realm.LockOutRealm">
>>          <!-- 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"
>>                 resourceName="UserDatabase"/>
>>        </Realm>
>>
>>        <Host name="localhost"  appBase="webapps"
>>              unpackWARs="true" autoDeploy="true">
>>
>>          <!-- SingleSignOn valve, share authentication between web applications
>>               Documentation at: /docs/config/valve.html -->
>>          <!--
>>          <Valve className="org.apache.catalina.authenticator.SingleSignOn" />
>>          -->
>>
>>          <!-- Access log processes all example.
>>               Documentation at: /docs/config/valve.html
>>               Note: The pattern used is equivalent to using pattern="common" -->
>>
>> 	<Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs"
>>                 prefix="localhost_access_log" suffix=".txt"
>>                 pattern="%h,%t,%m,%U,%H,%s,%B,%D,%{User-Agent}i" />
>>
>>          <Context path="" allowLinking="true" crossContext="true" docBase="/****/t"
sessionCookieName="****" />
>>        </Host>
>>      </Engine>
>>    </Service>
>> </Server>
>>
>> -----Original Message-----
>> From: André Warnier (tomcat) [mailto:aw@ice-sa.com]
>> Sent: Friday, January 13, 2017 10:42 AM
>> To:  users@tomcat.apache.org
>> Subject: Re: FW: tomcat 8080 thread not reduced
>>
>> On 13.01.2017 09:38, smith wrote:
>>>
>>>
>>>
>>>
>>> From: smith [mailto:smith.hua@zoom.us]
>>> Sent: Tuesday, January 10, 2017 9:57 AM
>>> To: 'users'
>>> Subject: tomcat 8080 thread not reduced
>>>
>>>
>>>
>>> Hi,
>>>
>>>
>>>
>>> We have installed Apache Tomcat/8.0.14, and found that after one period of time,
the thread count for 8080(our port published) goes to 120 and never reduced even the busy
count is only 3-4.
>>>
>>> Why? Tomcat8 not reduced the thread pool even the thread is idle, and the minSpareThreads
for tomcat8 default is only 10.
>>>
>>> When will the thread reduce?
>>>
>>>
>>>
>>>
>>>
>>> Best regards
>>>
>>> Smith
>>>
>>>
>>
>> Hi.
>>
>> Please copy/paste your complete server.xml configuration file (confidential things
removed), so that we could have a useful look at it.
>> Please edit *only* the confidential things, not entire sections. Often, the issue
is in the details.
>>
>>
>>
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>>
>>
>>
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>
>
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