On 16 April 2018 at 22:04, Mark Thomas <[email protected]> wrote:
> On 11/04/18 09:22, Richard Tearle wrote:
>
> <snip/>
>
>> I've built tomcat from source using the link you provided, and rebuilt the
>> containers with this tomcat, and can still reproduce the issue. I've uploaded
>> the logs (30s before the connection closed error), to dropbox:
>>
>> https://www.dropbox.com/s/qe50jbd196krtyo/logs-10-04-17.zip?dl=0
>
> Thanks for these.
>
> I've started to look at them. I don't have any firm conclusions yet. I
> have noticed that the problem occurs after a connection is made to the
> service from localhost rather than the remote IP that is making the
> other requests. The localhost client does not present a certificate.
>
> My working theory (so chances are it is completely wrong) is that the
> missing certificate in the request from localhost puts the OpenSSL
> engine into an error state that is not correctly handled by Tomcat
> causing the subsequent request to fail.
>
> I've also noticed that the debug level log message consistently report 0
> bytes being read which looks wrong but is probably a separate (minor) issue.
>
> Investigations continue.
>
> Mark
>
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Ah that rings a bell.
Our containers have a simple health check, simply does
curl --connect-timeout 5 --max-time 20 -k -s -S --stderr -\
https://localhost:${TOMCATS_PORT}/ |\
grep -q "NSS: client certificate not found" || exit 1
just to make sure the ESB is responding, with something we expect.
These are set to run at an interval of every 2m30s. The full parameters
in the docker-compose[1] file are:
healthcheck:
test: ["CMD", "/usr/local/bin/healthcheck.sh"]
interval: 2m30s
timeout: 10s
retries: 3
start_period: 20s
I've also disabled the health check on ESB container, and my tests
ran through for an hour, without a connection closed error.
[1] https://docs.docker.com/compose/compose-file/#healthcheck
--
Richard
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