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From "Brewer, Edward L" <lee.bre...@Vanderbilt.Edu>
Subject Help with Apache Tomcat/7.0.53 SSL issue
Date Tue, 07 Oct 2014 18:30:38 GMT
To all,

I am using Apache Tomcat 7.0.53 and I am having an intermittent issue with SSL.  I am currently
running three environments (Dev, UAT, and Prod. Prod comprises 4 VMs  (uname  states version
as  "2.6.32-431.11.2.el6.x86_x86_64 GNU/Linux" ) with each containing a local version of Java
[ Java(TM) SE Runtime Environment (build 1.7.0_55-b13)  Java HotSpot(TM) 64-Bit Server VM
(build 24.55-b03, mixed mode) ]  As well Tomcat and Java are owned by the user running the
app.  The VMs are load balanced over two pair of LTMs (LTM1 balances node 1 and node 2;  LTM2
balances node 3 and node 4).  The test environment is scaled down to just one LTM with two
nodes and development is just a single VM.

Now, when I deployed dev and test I did not have any issues with SSL.... everything went as
planned.  When I deployed into production, I started to get complaints about timeouts to the
service.  After much troubleshooting... we were able to discern, using curl, that in production
the LTM was not getting a response back from the application (using TCPDUMP) intermittently.
  Our LTMs are configured to server as a SSL proxy.  On the VM, TCPDUMP shows that traffic
is being presented to the socket but there is no response.  As far as I can tell the three
environments (TOMCAT and JAVA) are the same.   I find nothing in the logs from both access
and catalina.out.  When I restart the servers the problem goes away for about one hour then
it comes back rapidly.  Using top and sar I do not see any issues with operating system performance.
 Also,  by going done to one node the problem persists.  As well here are the options that
are in


Here is the error that I see from curl

curl: (52) SSL read: error:00000000:lib(0):func(0):reason(0), errno 104

Lee Brewer

Lee Brewer | Application Developer | Information Technology | Vanderbilt University | phone 615.343.2802 |<>
[Vanderbilt IT logo]

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