Creating a thread inside doPost

Hello,
I have a process which consumes approx 20-30 minutes. I don't want the user to wait till the processing is complete. I would like to display a response as soon as the data is sent to server. So I plan to create an instance of Thread and put the processing logic in the run(). And immediately send the response.
Will this logic cause any problems with the server performance? I don't have the option to use either MDB or JMS.
Thanks in advance,
Ajit

Hi,
It depends on what the process is ... I've done this in the past for large DB to DB transfers and there was no noticeable performance hit!
I used the users session to keep track of the thread. Basically, then I made an instance of the thread, I passed the users session to the thread and then the thread passed progress information to the users session. I then redirected the user to a please wait page that refreshed every 30 seconds to see if the thread was still running (by checking the status in the users session).
HTH.

Similar Messages

Error creating DaemonSession thread

Hi All,
I am having the "JVMCI015:OutOfMemoryError" with my Sun ONE Web Server 6.1 SP1 on IBM AIX platform. I am using IBM JDK 1.4.1.
I always hit this error when trying to load test the web server with 1500 concurrent users. I have set yhr RqThrottle tp 1536 and the MaxKeepAliveConnections is 1024. Java Heap Size is 512m. I even tried increase the heap size to 1.5 G, but the error still occur.
Would appreciate if any solution is given.
The detailed error is :
[28/May/2004:17:04:09] info (28120): CORE3274: successful server startup
[28/May/2004:17:05:50] failure (28120): Error creating DaemonSession thread
[28/May/2004:17:05:50] failure (28120): Error creating DaemonSession thread
[28/May/2004:17:05:50] failure (28120): Error creating DaemonSession thread
[28/May/2004:17:05:50] failure (28120): Error creating DaemonSession thread
[28/May/2004:17:05:50] failure (28120): Error creating DaemonSession thread
[28/May/2004:17:05:50] failure (28120): Error creating DaemonSession thread
[28/May/2004:17:05:50] failure (28120): Error creating DaemonSession thread
[28/May/2004:17:05:50] failure (28120): Error creating DaemonSession thread
[28/May/2004:17:05:50] failure (28120): Error creating DaemonSession thread
[28/May/2004:17:05:50] failure (28120): Error creating DaemonSession thread
[28/May/2004:17:05:50] failure (28120) https-uob: for host 10.128.1.33 trying to POST /servlet/LiveGiverServlet, service-j2ee
reports: StandardWrapperValve[LiveGiverServlet]: WEB2792: Servlet.service() for servlet LiveGiverServlet threw exception
javax.servlet.ServletException: WEB2664: Servlet execution threw an exception
at org.apache.catalina.core.StandardWrapperValve.invokeServletService(StandardWrapperValve.java:793)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:322)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java(Compiled Code))
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:212)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java(Compiled Code))
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:209)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java(Compiled Code))
at com.iplanet.ias.web.connector.nsapi.NSAPIProcessor.process(NSAPIProcessor.java:161)
at com.iplanet.ias.web.WebContainer.service(WebContainer.java:586)
----- Root Cause -----
java.lang.OutOfMemoryError: JVMCI015:OutOfMemoryError, cannot create anymore threads due to memory or resource constraints
at java.lang.Thread.start(Native Method)
at com._3rdfrontier.livegiver.servers.pushchannel.LiveGiverClientConsumer.<init>(LiveGiverClientConsumer.java(Compiled
Code))
at com._3rdfrontier.livegiver.servers.pushchannel.LiveGiverAggregator.subscribe(LiveGiverAggregator.java(Compiled Code
at com._3rdfrontier.livegiver.servers.pushchannel.LiveGiverAggregator.handleRequest(LiveGiverAggregator.java:838)
at LiveGiverServlet.doPost(LiveGiverServlet.java:1094)
at LiveGiverServlet.service(LiveGiverServlet.java:437)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:908)
at org.apache.catalina.core.StandardWrapperValve.invokeServletService(StandardWrapperValve.java:771)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:322)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java(Compiled Code))
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:212)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java(Compiled Code))
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:209)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java(Compiled Code))
at com.iplanet.ias.web.connector.nsapi.NSAPIProcessor.process(NSAPIProcessor.java:161)
at com.iplanet.ias.web.WebContainer.service(WebContainer.java:586)
magnus.conf
# The NetsiteRoot, ServerName, and ServerID directives are DEPRECATED.
# They will not be supported in future releases of the Web Server.
NetsiteRoot /package/SUNWwbsvr
ServerName AIX1
ServerID https-test
RqThrottle 1536
DNS off
Security off
PidLog /package/SUNWwbsvr/https-test/logs/pid
User qgdev
#StackSize 131072
StackSize 524288
TempDir /tmp/https-test-5328a767
PostThreadsEarly on
KernelThreads off
#enabling statistic
UseNativePoll off
KeepAliveThreads 2
MaxKeepAliveConnections 1024
AsyncDNS off
Init fn=flex-init access="$accesslog" format.access="%Ses->client.ip% - %Req->vars.auth-user% [%SYSDATE%] \"%Req->reqpb.clf-request%\" %Req->srvhdrs.clf-status% %Req->srvhdrs.content-length%"
Init fn="load-modules" shlib="/package/SUNWwbsvr/bin/https/lib/libj2eeplugin.so" shlib_flags="(global|now)"
Init fn="stats-init" update-interval="5" virtual-servers="1" profiling="yes"
server.xml
<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE SERVER PUBLIC "-//Sun Microsystems Inc.//DTD Sun ONE Web Server 6.1//EN" "file:///package/SUNWwbsvr/bin/https/dtds/sun-web-server_6_1.dtd">
<SERVER qosactive="false">
<PROPERTY name="docroot" value="/package/SUNWwbsvr/docs"/>
<PROPERTY name="accesslog" value="/package/SUNWwbsvr/https-test/logs/access"/>
<PROPERTY name="user" value=""/>
<PROPERTY name="group" value=""/>
<PROPERTY name="chroot" value=""/>
<PROPERTY name="dir" value=""/>
<PROPERTY name="nice" value=""/>
<LS id="ls1" port="5050" servername="AIX1" defaultvs="https-test" ip="any" security="off" acceptorthreads="4" blocking="false"/>
<MIME id="mime1" file="mime.types"/>
<ACLFILE id="acl1" file="/package/SUNWwbsvr/httpacl/generated.https-test.acl"/>
<VSCLASS id="vsclass1" objectfile="obj.conf" rootobject="default" acceptlanguage="false">
<VS id="https-test" connections="ls1" mime="mime1" aclids="acl1" urlhosts="AIX1" state="on">
<USERDB id="default"/>
<WEBAPP uri="/" path="/projects/test/web/http" enabled="true"/>
</VS>
</VSCLASS>
<JAVA javahome="/package/SUNWwbsvr/bin/https/jdk" serverclasspath="" classpathsuffix="" envclasspathignored="true" nativelibrarypathprefix="" debug="off" debugoptions="-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=n" dynamicreloadinterval="-1">
<JVMOPTIONS>-Djava.security.auth.login.config=/package/SUNWwbsvr/https-test/config/login.conf</JVMOPTIONS>
<JVMOPTIONS>-Djava.util.logging.manager=com.iplanet.ias.server.logging.ServerLogManager</JVMOPTIONS>
<JVMOPTIONS>-Dorg.omg.CORBA.ORBClass=com.ibm.CORBA.iiop.ORB</JVMOPTIONS>
<JVMOPTIONS>-Dorg.omg.CORBA.ORBSingletonClass=com.ibm.rmi.corba.ORBSingleton</JVMOPTIONS>
<JVMOPTIONS>-Djavax.rmi.CORBA.UtilClass=com.ibm.CORBA.iiop.UtilDelegateImpl</JVMOPTIONS>
<JVMOPTIONS>-Djavax.rmi.CORBA.StubClass=com.ibm.rmi.javax.rmi.CORBA.StubDelegateImpl</JVMOPTIONS>
<JVMOPTIONS>-Djavax.rmi.CORBA.PortableRemoteObjectClass=com.ibm.rmi.javax.rmi.PortableRemoteObject</JVMOPTIONS>
<JVMOPTIONS>-Xms512m</JVMOPTIONS>
<JVMOPTIONS>-Xmx512m</JVMOPTIONS>
<SECURITY defaultrealm="file" anonymousrole="ANYONE" audit="false">
<AUTHREALM name="file" classname="com.iplanet.ias.security.auth.realm.file.FileRealm">
<PROPERTY name="file" value="/package/SUNWwbsvr/https-test/config/keyfile"/>
<PROPERTY name="jaas-context" value="fileRealm"/>
</AUTHREALM>
<AUTHREALM name="native" classname="com.iplanet.ias.security.auth.realm.webcore.NativeRealm">
<PROPERTY name="jaas-context" value="nativeRealm"/>
</AUTHREALM>
<AUTHREALM name="ldap" classname="com.iplanet.ias.security.auth.realm.ldap.LDAPRealm">
<PROPERTY name="directory" value="ldap://localhost:389"/>
<PROPERTY name="base-dn" value="o=isp"/>
<PROPERTY name="jaas-context" value="ldapRealm"/>
</AUTHREALM>
</SECURITY>
<RESOURCES/>
</JAVA>
<LOG file="/package/SUNWwbsvr/https-test/logs/errors" loglevel="info" logvsid="true" logstdout="false" logstderr="true" logtoconsole="false" createconsole="false" usesyslog="false"/>
</SERVER>

Hi Elving,
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But what happen is that if i have an application which will take a very long time to process a request and probably will not complete the request for a few hours. So if i want to test for 1500 concurrent users, i need to have at least 1500 threads to service this kind of request. Otherwise, some of the users may need to wait for a few hours in order to get serviced by web server.
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Creating a Thread so that I don't wait on a Method?

Good Evening All!
I have a simple java program that reads a file containing XML and then posts that XML to a webserver. When I run the program I would normally have about 5,000 xml "documents" in the file that need to be posted to the webserver. Today, I have create a method to read from the file and then a method to post the data and that is contained in a do loop. The issue that I have is that it takes sever seconds for the webserver to respond to each request. Thus it takes about 5 seconds for each call to post. (The Post method that I have created does not return any data. It does connect to a logging database and logs the result that it received. )
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So, in this case do you have any advice?
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public static void main(String[] args)
Connection c = null;
Statement stmnt = null;
try
Class.forName( "sun.jdbc.odbc.JdbcOdbcDriver" );
c = DriverManager.getConnection("jdbc:odbc:Driver={Microsoft Excel Driver (*.xls)};DBQ=" + args[0]);
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String query = "Select * from [data$]" ;
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while( rs.next() )
XML.Post( rs.getString(1) + rs.getString(2) );
catch( Exception e )
System.err.println( e );
}

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import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
* ThreadJvmMemory.java
* Created on June 1, 2007, 9:49 AM
* To change this template, choose Tools | Template Manager
* and open the template in the editor.
* @author Administrator
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2. Is there any way to configure process space. IMO No ?? Confirm ??
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[GC [DefNew: 5208K->38K(5824K), 0.0072564 secs] 32049K->26879K(34636K), 0.0080451 secs]
[GC [DefNew: 5222K->24K(5824K), 0.0070320 secs] 32063K->26868K(34636K), 0.0078097 secs]
[GC [DefNew: 5208K->39K(5824K), 0.0082161 secs] 32052K->26883K(34636K), 0.0090173 secs]
[GC [DefNew: 5223K->27K(5824K), 0.0080766 secs] 32067K->26874K(34636K), 0.0089273 secs]
[GC [DefNew: 5211K->39K(5824K), 0.0071186 secs] 32058K->26886K(34636K), 0.0078970 secs]
[GC [DefNew: 5223K->25K(5824K), 0.0070952 secs] 32070K->26875K(34636K), 0.0078766 secs]
[GC [DefNew: 5209K->21K(5824K), 0.0069871 secs] 32059K->26872K(34636K), 0.0077657 secs]

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import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
* ThreadJvmMemory.java
* Created on June 1, 2007, 9:49 AM
* To change this template, choose Tools | Template Manager
* and open the template in the editor.
* @author Administrator
public class ThreadJvmMemory extends Thread{
/** Creates a new instance of ThreadJvmMemory */
BufferedReader in = null;
public ThreadJvmMemory() {
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dummy.waitTillEnter();
for(int i=0;i<5000;i++){
if(i%1000==0){
System.out.println(i);
dummy.waitTillEnter();
ThreadJvmMemory dummy1 = new ThreadJvmMemory();
dummy1.start();
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//System.out.println("Here");
Object dummyObject = new Object();
try {
in = new BufferedReader(new InputStreamReader(System.in));
in.readLine();
} catch (IOException ex) {
ex.printStackTrace();
System.out.println("Came out of the thread");
public void waitTillEnter(){
try {
if(in==null)
in = new BufferedReader(new InputStreamReader(System.in));
in.readLine();
} catch (IOException ex) {
ex.printStackTrace();
I started the program using the following command line option..
"c:\Program Files\Java\jdk1.5.0_09\bin\java.exe" -Dcom.sun.management.jmxremote.port=9979 -Xmx512m -Xminf0.1 -Xmaxf0.1 -XX:MaxPermSize=256m -XX:PermSize=256m -XX:+<GCTYPE> -XX:+PrintGCDetails
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1. Actually when we will get OOM error saying unable to create Native thread. To be more specific when which space occupied i will get this error.
2. Is there any way to configure process space. IMO No ?? Confirm ??
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OS Windows 2k3
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[GC [DefNew: 5208K->38K(5824K), 0.0072564 secs] 32049K->26879K(34636K), 0.0080451 secs]
[GC [DefNew: 5222K->24K(5824K), 0.0070320 secs] 32063K->26868K(34636K), 0.0078097 secs]
[GC [DefNew: 5208K->39K(5824K), 0.0082161 secs] 32052K->26883K(34636K), 0.0090173 secs]
[GC [DefNew: 5223K->27K(5824K), 0.0080766 secs] 32067K->26874K(34636K), 0.0089273 secs]
[GC [DefNew: 5211K->39K(5824K), 0.0071186 secs] 32058K->26886K(34636K), 0.0078970 secs]
[GC [DefNew: 5223K->25K(5824K), 0.0070952 secs] 32070K->26875K(34636K), 0.0078766 secs]
[GC [DefNew: 5209K->21K(5824K), 0.0069871 secs] 32059K->26872K(34636K), 0.0077657 secs]

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Please reply with a solution

This was related to kernel level settings
The attribute max_thread_proc was set to 64 which was not enough. So increase that to 2048 and the Web-Server Instance wil start.

Creating a thread inside doPost

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