CODEWITHSUNDEEP
multithreadingjsptomcat
user3338098
user3338098

Reputation: 874

Tomcat not Multithreading Session requests

Related question: https://stackoverflow.com/questions/29616394/tomcat-multithreaded-application-issue

here is the jsp file:

<%
int id = new java.util.Random().nextInt(10000);
System.out.println("STARTING REQUEST: "+id);
Thread.sleep(10000);
System.out.println("ENDING REQUEST: "+id);
%>

fairly simple yet the output is

STARTING REQUEST: 6009
ENDING REQUEST: 6009
STARTING REQUEST: 2792
ENDING REQUEST: 2792
STARTING REQUEST: 4504
ENDING REQUEST: 4504

How could I possibly hope to handle even a dozen browser sessions with this kind of multitasking?

What setting am I missing in tomcat? It's a plain install with hardly any changes...

here are the parts of server.xml I have messed with:

    <Executor name="tomcatThreadPool" namePrefix="catalina-exec-"
    maxThreads="150" minSpareThreads="4"/>

    <Connector executor="tomcatThreadPool"
           port="38765" protocol="HTTP/1.1"
           connectionTimeout="20000"
           redirectPort="8443" maxThreads="150" />

If however I run each request from different browsers I get this kind of output

STARTING REQUEST: 6009
STARTING REQUEST: 2792
STARTING REQUEST: 4504
ENDING REQUEST: 2792
ENDING REQUEST: 6009
ENDING REQUEST: 4504

So I was wondering, is there a good reason why session requests are synchronized? If not, can multi-threading be enabled?

Upvotes: 1

Views: 80

Answers (1)

Mark Thomas
Mark Thomas

Reputation: 16635

JSPs are multi-threaded by default.

Session requests are not synchronized.

The problem lies in how you are generating requests, not in how Tomcat is processing them.

Upvotes: 1

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