apt-get install haveged
update-rc.d haveged defaults

Increases entropy pool and there for reduces start up time for Tomcat.

Markus


Am 30.12.19 um 11:22 schrieb Rainer Jung:
> It depends a bit on the major Java version you are using, but have a
> look at this page:
>
> https://cwiki.apache.org/confluence/display/TOMCAT/HowTo+FasterStartUp#HowToFasterStartUp-EntropySource
>
>
> Regards,
>
> Rainer
>
> Am 30.12.2019 um 05:01 schrieb Vince Stewart:
>> I started recently using my my java app with embedded Tomcat / 8.0.28
>> on a
>> debian VPS (DigitalOcean).
>>
>> Unfortunately, it can take up to 20 minutes to launch into action
>> from the
>> time you start execution. The issue relates to "Creation of SecureRandom
>> instance ... using SHA1PRNG".  Slowness has been described and
>> explained in
>> Stackoverflow.
>>
>> My tomcat has otherwise been so reliable that I have had no
>> motivation to
>> keep it upgraded.  Can anyone advise if some change will apply if I
>> upgrade
>> to the latest version 8.
>>
>> Otherwise, is there a configuration change I could employ.
>>
>> Many thanks,
>
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