Session Idle times out when SSL is enabled

I have developed an HTTP Routing server using Mina 1.0.9 and I am using SSLFilter for handling SSL Connections.

1. Using Jmeter as the client I am sending HTTPS requests to this server with 5 threads.
2. For some of the requests(10%) the sessionCreated method on the Handler is getting called and the data from the client is not read by the server.
3. sessionIdle() gets triggered and we close the connection.

This happens for the ssl connections only and when the server is trying to resume the cached session.

I enabled ssl debug using -Djavax.net.debug=all on the server and I got the following logs for the failed sessions

0240: EB 3E 28 AD 97 20 36 B7 C0 35 4E 3E 80 71 88 99 %% Created: [Session-17, SSL_RSA_WITH_RC4_128_MD5]
9uTWV0aG961 58 4Dk%% Cached server session: [Session-17, SSL_RSA_WITH_RC4_128_MD5]
10 7A 0F 37 59C 66 D3 18 2A 2B 3144 1F 5 D9 16A EB 1 1F%% Resuming [Session-17, SSL_RSA_WITH_RC4_128_MD5]
org.apache.mina.filter.SSLFilter.SSLSession=[Session-17, SSL_RSA_WITH_RC4_128_MD5]
%% Invalidated: [Session-17, SSL_RSA_WITH_RC4_128_MD5]

Any ideas why this could happen?