Thanks for reporting back!
great it works as expected :)

On Wed, 3 Apr 2019 at 13:22, R. Scholz <rene.sch...@abakus-edv-systems.de>
wrote:

> Hello Maxim,
>
> the result of "timedatectl":
>                       Local time: Mi 2019-04-03 08:06:21 CEST
>                   Universal time: Mi 2019-04-03 06:06:21 UTC
>                         RTC time: Mi 2019-04-03 06:06:21
>                        Time zone: Europe/Berlin (CEST, +0200)
>        System clock synchronized: no
> systemd-timesyncd.service active: no
>                  RTC in local TZ: no
>
> Now I put the parameter you wrote helpful in your last email and it seems
> to be functionally.
>
> Here is the fully parameter I actually use, if someone need it.
>
> <property name="openjpa.ConnectionProperties"
>     value="DriverClassName=com.mysql.cj.jdbc.Driver
>         ,
> Url=jdbc:mysql://localhost:3306/openmeetings?autoReconnect=true&amp;useUnicode=true&amp;createDatabaseIfNotExist=true&amp;characterEncoding=utf-8&amp;connectionCollation=utf8_ge
>         , maxTotal=100
>         , maxIdle=100
>         , minIdle=0
>         , maxWaitMillis=10000
>         , TestOnBorrow=true
>         , poolPreparedStatements=true
>         , serverTimezone=Europe/Berlin
>         , Username=
>         , Password=" />
>
> I am a little bit amazed about one thing: To test the new OM5 I made a lot
> of times a new virtual machine with the same Ubuntu 18.04-Installation. I
> mean that the
> the first times the OM-MySQL-Connection runs without problems. No
> modification necessary. Anytime the error Maxim describe occurs, and I dont
> know why.
> Sure, I made something different, but I have no idea what it can be.
>
> OK, for the moment I am very happy, get a gulp from my fresh/hot coffee
> and look forward to test the newest modification Maxim implemented
> yesterday in a speed where I am very surprised.
> Maxim: Very good work!
>
> Best regards,
>
> René
>
>
> Am 03.04.2019 um 05:25 schrieb Maxim Solodovnik:
>
> Just have tried to change TZ on my test Ubuntu server to be CEST and:
>
> *sudo timedatectl set-timezone CEST*
> Failed to set time zone: Invalid time zone 'CEST'
>
> What is the result of `timedatectl` command on your system?
>
>
> On Wed, 3 Apr 2019 at 07:35, Maxim Solodovnik <solomax...@gmail.com>
> wrote:
>
>> Hello René,
>>
>> I'll try to set up VM to test following steps (so here it is untested)
>> 1) open
>> ${OM_HOME}/webapps/openmeetings/WEB-INF/classes/META-INF/mysql_persistence.xml
>> 2) find <property name="openjpa.ConnectionProperties"
>> 3) add ", serverTimezone=Europe/Berlin" to the comma separated values
>>
>> run command line or web installer
>>
>> On Wed, 3 Apr 2019 at 02:16, R. Scholz
>> <rene.sch...@abakus-edv-systems.de> wrote:
>> >
>> > Hello,
>> >
>> > I dont know where I have to write what TimeZone-Variable.
>> > I think it is the
>> "/opt/open500/webapps/openmeetings/WEB-INF/classes/META-INF/mysql_persistence.xml".
>> >
>> > But where I have to write what to eliminate the "The server time zone
>> value 'CEST' is unrecognized or..."-error?
>> >
>> > Best regards,
>> >
>> > René
>> >
>> >
>> >
>> >
>> > Am 02.04.2019 um 07:35 schrieb Maxim Solodovnik:
>> >
>> > Hello All,
>> >
>> > recently I got error report from Alvaro regarding DB connection issue
>> while MariaDB us used
>> > After some "email ping-pong" I got logs, relevant part of logs can be
>> found here [1]
>> >
>> > The first, huge stack trace provides only general information: "Could
>> not create connection to database server. Attempted reconnect 3 times.
>> Giving up."
>> > Nothing to work with
>> >
>> > BUT the second one states: "The server time zone value 'CEST' is
>> unrecognized or represents more than one time zone. You must configure
>> either the server or JDBC driver (via the serverTimezone configuration
>> property) to use a more specifc time zone value if you want to utilize time
>> zone support."
>> >
>> > This one provides the root cause of the problem and possible solutions:
>> > 1) change server TZ to be more specific i.e. Europe/Berlin (not CEST)
>> > 2) edit persistense.xml file and add `serverTimezone` configuration
>> property with TZ of MariaDb server
>> >
>> > Hope it can help
>> >
>> > [1]
>> > java.sql.SQLNonTransientConnectionException: Could not create
>> connection to database server. Attempted reconnect 3 times. Giving up.
>> > at
>> com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:110)
>> > at
>> com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:97)
>> > at
>> com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:89)
>> > at
>> com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:63)
>> > at
>> com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:73)
>> > at
>> com.mysql.cj.jdbc.ConnectionImpl.connectWithRetries(ConnectionImpl.java:905)
>> > at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:830)
>> > at com.mysql.cj.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:455)
>> > at com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:240)
>> > at
>> com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:199)
>> > at java.sql.DriverManager.getConnection(DriverManager.java:664)
>> > at java.sql.DriverManager.getConnection(DriverManager.java:247)
>> > at
>> org.apache.openmeetings.web.pages.install.InstallWizard$DbStep$1.onValidateModelObjects(InstallWizard.java:266)
>> > at
>> org.apache.wicket.markup.html.form.Form.internalOnValidateModelObjects(Form.java:1870)
>> > at org.apache.wicket.markup.html.form.Form.process(Form.java:956)
>> > at
>> org.apache.wicket.markup.html.form.Form.onFormSubmitted(Form.java:788)
>> > at
>> org.apache.wicket.ajax.form.AjaxFormSubmitBehavior.onEvent(AjaxFormSubmitBehavior.java:176)
>> > at
>> org.apache.wicket.ajax.AjaxEventBehavior.respond(AjaxEventBehavior.java:127)
>> > at
>> org.apache.wicket.ajax.AbstractDefaultAjaxBehavior.onRequest(AbstractDefaultAjaxBehavior.java:598)
>> > at
>> org.apache.wicket.core.request.handler.ListenerRequestHandler.internalInvoke(ListenerRequestHandler.java:306)
>> > at
>> org.apache.wicket.core.request.handler.ListenerRequestHandler.invoke(ListenerRequestHandler.java:280)
>> > at
>> org.apache.wicket.core.request.handler.ListenerRequestHandler.invokeListener(ListenerRequestHandler.java:222)
>> > at
>> org.apache.wicket.core.request.handler.ListenerRequestHandler.respond(ListenerRequestHandler.java:208)
>> > at
>> org.apache.wicket.request.cycle.RequestCycle$HandlerExecutor.respond(RequestCycle.java:914)
>> > at
>> org.apache.wicket.request.RequestHandlerExecutor.execute(RequestHandlerExecutor.java:65)
>> > at
>> org.apache.wicket.request.cycle.RequestCycle.execute(RequestCycle.java:282)
>> > at
>> org.apache.wicket.request.cycle.RequestCycle.processRequest(RequestCycle.java:253)
>> > at
>> org.apache.wicket.request.cycle.RequestCycle.processRequestAndDetach(RequestCycle.java:221)
>> > at org.apache.wicket.protocol.ws
>> .AbstractUpgradeFilter.processRequestCycle(AbstractUpgradeFilter.java:70)
>> > at
>> org.apache.wicket.protocol.http.WicketFilter.processRequest(WicketFilter.java:206)
>> > at
>> org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:299)
>> > at
>> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
>> > at
>> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
>> > at
>> org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:200)
>> > at
>> org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
>> > at
>> org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:607)
>> > at
>> org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)
>> > at
>> org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
>> > at
>> org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:678)
>> > at
>> org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
>> > at
>> org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
>> > at
>> org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408)
>> > at
>> org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
>> > at
>> org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:834)
>> > at org.apache.tomcat.util.net
>> .NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1415)
>> > at org.apache.tomcat.util.net
>> .SocketProcessorBase.run(SocketProcessorBase.java:49)
>> > at
>> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
>> > at
>> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
>> > at
>> org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
>> > at java.lang.Thread.run(Thread.java:748)
>> > Caused by: com.mysql.cj.exceptions.InvalidConnectionAttributeException:
>> The server time zone value 'CEST' is unrecognized or represents more than
>> one time zone. You must configure either the server or JDBC driver (via the
>> serverTimezone configuration property) to use a more specifc time zone
>> value if you want to utilize time zone support.
>> > at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
>> > at
>> sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
>> > at
>> sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>> > at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>> > at
>> com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:61)
>> > at
>> com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:85)
>> > at com.mysql.cj.util.TimeUtil.getCanonicalTimezone(TimeUtil.java:132)
>> > at
>> com.mysql.cj.protocol.a.NativeProtocol.configureTimezone(NativeProtocol.java:2241)
>> > at
>> com.mysql.cj.protocol.a.NativeProtocol.initServerSession(NativeProtocol.java:2265)
>> > at
>> com.mysql.cj.jdbc.ConnectionImpl.initializePropsFromServer(ConnectionImpl.java:1319)
>> > at
>> com.mysql.cj.jdbc.ConnectionImpl.connectWithRetries(ConnectionImpl.java:868)
>> > ... 44 common frames omitted
>> >
>> > --
>> > WBR
>> > Maxim aka solomax
>> >
>> >
>>
>>
>> --
>> WBR
>> Maxim aka solomax
>>
>
>
> --
> WBR
> Maxim aka solomax
>
>
>

-- 
WBR
Maxim aka solomax

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