On 18/02/2019 10:24, fai...@bestercapitalmedia.com wrote:
> Hi Ted,
> 
> Yes, you are right.
> I just need to restart the tomcat to get back it on. 
> There is no need to restart the mySql in my case.
> 
> Any clue please.

Sounds like a connection leak in the web application. I expect the
connection pool includes tools to help you track that sort of problem down.

Mark


> 
> Faisal Zaidi
> 
> -----Original Message-----
> From: Ted Spradley [mailto:ted.k.sprad...@gmail.com] 
> Sent: Monday, February 18, 2019 1:52 PM
> To: Tomcat Users List
> Subject: Re: Tomcat connection error
> 
> Hi Faisal, 
> 
> Your application(s) run as expected for a while, then you get the SQL 
> Connection error? Then the only way to “fix it” is to restart Tomcat? At the 
> same time are you also restarting MySQL? 
> 
> Thanks,
> Ted
> 
>> On Feb 18, 2019, at 02:17, Luis Rodríguez Fernández <uo67...@gmail.com> 
>> wrote:
>>
>> Hello Faisal,
>>
>> It looks like your problem is more related with your hikari connection 
>> pool than with tomcat itself. I would recommend you to double check 
>> your hikari configuration properties. Pay specially attention on how 
>> you are configuring your connection pool (minimum and maximum size, 
>> timeout,
>> etc...) It looks like there is "something" in your application that 
>> prevents to get connections from your pool.
>>
>> Hope it helps,
>>
>> Luis
>>
>>
>>
>>
>>
>>
>>> El lun., 18 feb. 2019 a las 6:33, <fai...@bestercapitalmedia.com> escribió:
>>>
>>> Dear all,
>>>
>>>
>>>
>>> I am working on a project and I am facing following issue on almost 
>>> every second day. I need to restart tomcat to get it running again.
>>>
>>> Can someone guide me on it. Ask if you need some other insight to 
>>> look into it.
>>>
>>>
>>>
>>> 2019-02-18 04:49:35.572  WARN 20698 --- [io-4200-exec-15]
>>> o.h.engine.jdbc.spi.SqlExceptionHelper   : SQL Error: 0, SQLState: null
>>>
>>> 2019-02-18 04:49:35.572 ERROR 20698 --- [io-4200-exec-15]
>>> o.h.engine.jdbc.spi.SqlExceptionHelper   : HikariPool-1 - Connection is not
>>> available, request timed out after 30000ms.
>>>
>>> 2019-02-18 04:49:35.573  WARN 20698 --- [io-4200-exec-15] 
>>> o.s.s.o.provider.endpoint.TokenEndpoint  : Handling error:
>>> InternalAuthenticationServiceException, Unable to acquire JDBC 
>>> Connection; nested exception is 
>>> org.hibernate.exception.JDBCConnectionException: Unable to acquire 
>>> JDBC Connection
>>>
>>>
>>>
>>> Server is Ubuntu (aws)
>>>
>>> Database is mySql
>>>
>>> java version "1.8.0_181"
>>>
>>> Java(TM) SE Runtime Environment (build 1.8.0_181-b13)
>>>
>>> Java HotSpot(TM) 64-Bit Server VM (build 25.181-b13, mixed mode)
>>>
>>>
>>>
>>> Best Regards | Bien Cordialement | تحياتي
>>>
>>> Faisal Zaidi
>>> Application Architect
>>>
>>>
>>>
>>>
>>
>> --
>>
>> "Ever tried. Ever failed. No matter. Try Again. Fail again. Fail better."
>>
>> - Samuel Beckett
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