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http://nagoya.apache.org/bugzilla/show_bug.cgi?id=7125

Datasource lookup returns null under heavy load

           Summary: Datasource lookup returns null under heavy load
           Product: Tomcat 4
           Version: 4.0.1 Final
          Platform: Other
        OS/Version: AIX
            Status: NEW
          Severity: Normal
          Priority: Other
         Component: Unknown
        AssignedTo: [EMAIL PROTECTED]
        ReportedBy: [EMAIL PROTECTED]


We're developing a web application on AIX 4.3.3.0 
with ibm jre 1.3.1 and tomcat 4.0.1 final and Oracle
thin jdbc driver for Oracle 8.1.7.2. We developed a 
programm in order to performance test our web 
application. The performance program forks up a 
great number of parallel threads. 

One of our classes retrieves a datasource like this:

        Context initCtx = new InitialContext();
        Context envCtx = (Context) initCtx.lookup("java:comp/env");
        dataSource = (DataSource) envCtx.lookup(resourceName);

The program works ok, as long the concurrent threads
reach the number of around 160. At this stage the
lookup method will return the null object. Any
idea how to overcome this problem. Thanks.

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