Hi All,
I am facing an Out of Memory Issue with my application. I am using Embedded
Tomcat 6.0.18. I have a simple servlet deployed which does nothing but set the
HTTPResponse and return it.
Now I have 2 testing clients
Client 1:
HTTPClient 3.1 with MultiThreadedHttpConnectionManager with SSL
maxConnections = 200
maxConnectionsPerHost=200
Client 2:
HTTPClient 4.1 in which I configured multiple threads
for (int i = 0; i < noofConnections; i++) {
Thread t = new Thread(my);
t.start();
}
With every thread executing HTTPGet on the servlet. This too with SSL.
Now with client 1,my JVM crashes after just a few minutes. Running with 8gb
heap space.
I took a heap dump for 2gb heap space using Jmap and analyzed it with MAT. It
seems that there were many instances of
org.apache.catalina.session.StandardManager consuming almost 95% of heap space.
CPU utilization is only 13 -14% and I can see only 65 threads active with
netstat.
With Client 2,everything looks fine. Though JVM crashes at 2gb,but at 8gb it
works fine. Though CPU utilization is almost 90% and 100 simultaneous threads
created for 100 simultaneous threads.
Both my server and clients are on Linux 64 bit machines.
I believe that this is something related to the client 1 i.e. either the
HTTPClient 3.1 or the MultiThreadedConnectionManager,but posting here if
someone can assist me in what might be the root cause.
Chirag
