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From noel joseph <noelvinu1...@gmail.com>
Subject Re: Tomcat error at run-time.
Date Wed, 01 Aug 2018 05:13:52 GMT
Hey Chris,
 I am having a little difficulty in logging. As mentioned before I am new
to tomcat and don't exactly know how to enable logging.
Could you please instruct me on how to do so.

Thanks,
Noel

On Tue, Jul 31, 2018 at 7:49 PM, noel joseph <noelvinu1223@gmail.com> wrote:

> Thank you so much Cris I will try your methods and let you know off the
> results. Thanks for the quick response!
>
> Cheers
> Noel
>
> On Tue, Jul 31, 2018, 6:44 PM Christopher Schultz <
> chris@christopherschultz.net> wrote:
>
>> -----BEGIN PGP SIGNED MESSAGE-----
>> Hash: SHA256
>>
>> Noel,
>>
>> On 7/31/18 2:54 AM, noel joseph wrote:
>> > Hi, I am rather new to tomcat, I've been trying to embed tomcat in
>> > a java application. I further want to convert this into a java web
>> > start file so that on deploying it I can have a separate tomcat
>> > server for my application. The error I am facing is...
>> > org.apache.catalina.LifecycleException: A child container failed
>> > during start.
>>
>> A "child container" usually ends up being something like an
>> application. Do you have any logging enabled? If so, what does the log
>> say? If not, try enabling logging and then checking the log. Tomcat is
>> usually pretty verbose about what happened and what it happened to.
>>
>> > I tried a couple of methods to solve it but with no use, the error
>> > still stays. I am using embedded tomcat 8.5.23, I changed it to the
>> > latest tomcat 9.0.10 which fixed the error but then the server
>> > didn't start. it just stops at.. WARNING: Creation of secureRandom
>> > insatnce.....
>>
>> If you are hanging on creating SecureRandom, your server (or
>> workstation) might have run out of cryptographic entropy. This can
>> happen when you restart a server like Tomcat too rapidly and the OS
>> doesn't have enough time to re-fill the entropy pool.
>>
>> Can you take a thread dump[1] of the running process the next time
>> this stalls, just to be sure?
>>
>> > By reverting back to tomcat 8.5.23 this was solved but again I'm
>> > facing the child container failed error.
>> >
>> > Please let me know if there is a fix to my issue or if there is a
>> > better version of tomcat that I can use.
>>
>> The problem is likely with a component of your application. Logs will
>> help discover the root of the problem.
>>
>> The decision to use Tomcat 8.5 or Tomcat 9.0 has more to do with your
>> risk-aversion. Both versions are still under active development, but
>> Tomcat 8.5 is more mature and stable (from a code perspective, not
>> that it is any more reliable than 9.0). Both versions should be
>> maintained for the next few years.
>>
>> Hope that helps,
>> - -chris
>>
>> [1]
>> https://wiki.apache.org/tomcat/HowTo#How_do_I_obtain_a_thread_dump_of_my
>> _running_webapp_.3F
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