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From Jean-Baptiste Onofré ...@nanthrax.net>
Subject Re: Flyway and Karaf
Date Thu, 01 Aug 2019 04:40:22 GMT
Yes, it's what I meant: you have to "gather" the classloaders.

An option to add all flyway bundles as require bundle/private package in
your own bundle. Like this, all will be in your bundle classloader.

Another option is to use fragment with your bundle as host (as a
fragment is just resolved, only the host is started).

Regards
JB

On 01/08/2019 06:36, Kushal Gautam wrote:
> Hi JB:
> 
> Thank you for your reply.
> 
> I tried the options I could. 
> 
> For example, some suggested that this problem was resolved by using
> Fragment-Host in maven-bundle-plugin as shown
> here: https://github.com/FlavioF/fabric8-osgi-flyway-example/blob/master/fabric8-osgi-flyway/pom.xml
> 
> But, doing that, my bundle never started because it gives me another
> error saying: " ... cannot start the fragment host .... "
> 
> I am totally clueless.
> 
> Regards,
> Cooshal.
> 
> On Thu, Aug 1, 2019 at 6:23 AM Jean-Baptiste Onofré <jb@nanthrax.net
> <mailto:jb@nanthrax.net>> wrote:
> 
>     Hi,
> 
>     NoClassDefFoundError is certainly due to a class (or several classes) in
>     different classloaders.
> 
>     I don't know Flyway, so I have to take a look how they load the
>     providers. It seems an issue in Flyway on OSGi.
> 
>     Regards
>     JB
> 
>     On 31/07/2019 22:45, Kushal Gautam wrote:
>     > Hi,
>     >
>     >  I am trying to use Flyway in my Karaf instance.
>     >
>     > I have prepared a demo to reproduce the error that I have
>     encountered at
>     > https://github.com/cooshal/karaf-flyway.
>     >
>     > I am using a custom built karaf distribution.
>     >
>     > I have created two different modules inside db-migrations:
>     > 1. flyway provider which has implementations to carry out flyway
>     migrations
>     > 2. karaf command, which invokes the implementation of flyway provider
>     > bundle.
>     >
>     > I tried following:
>     >
>     > karaf@root()> dbf:migrate
>     > Error executing command: java.lang.NoClassDefFoundError: Could not
>     > initialize class org.flywaydb.core.Flyway
>     >
>     > karaf@root()> log:tail
>     > 22:37:11.081 ERROR [Karaf local console user karaf] Exception caught
>     > while executing command
>     > java.util.concurrent.ExecutionException:
>     java.lang.NoClassDefFoundError:
>     > Could not initialize class org.flywaydb.core.Flyway
>     >         at java.util.concurrent.FutureTask.report(FutureTask.java:122)
>     > ~[?:?]
>     >         at
>     java.util.concurrent.FutureTask.get(FutureTask.java:192) ~[?:?]
>     >         at
>     >
>     org.apache.felix.gogo.runtime.CommandSessionImpl$JobImpl.run(CommandSessionImpl.java:829)
>     > ~[?:?]
>     >         at
>     >
>     java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>     > ~[?:?]
>     >         at
>     java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[?:?]
>     >         at
>     >
>     java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
>     > ~[?:?]
>     >         at
>     >
>     java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
>     > ~[?:?]
>     >         at java.lang.Thread.run(Thread.java:745) [?:?]
>     > Caused by: java.lang.NoClassDefFoundError: Could not initialize class
>     > org.flywaydb.core.Flyway
>     >         at
>     >
>     com.example.db.migrations.FlywayDBMigrations.migrate(FlywayDBMigrations.java:16)
>     > ~[?:?]
>     >         at
>     >
>     com.example.flyway.command.MigrateDatabaseCommand.execute(MigrateDatabaseCommand.java:20)
>     > ~[?:?]
>     >         at
>     >
>     org.apache.karaf.shell.impl.action.command.ActionCommand.execute(ActionCommand.java:84)
>     > ~[?:?]
>     >         at
>     >
>     org.apache.karaf.shell.impl.console.osgi.secured.SecuredCommand.execute(SecuredCommand.java:68)
>     > ~[?:?]
>     >         at
>     >
>     org.apache.karaf.shell.impl.console.osgi.secured.SecuredCommand.execute(SecuredCommand.java:86)
>     > ~[?:?]
>     >         at
>     > org.apache.felix.gogo.runtime.Closure.executeCmd(Closure.java:571)
>     ~[?:?]
>     >         at
>     >
>     org.apache.felix.gogo.runtime.Closure.executeStatement(Closure.java:497)
>     > ~[?:?]
>     >         at
>     > org.apache.felix.gogo.runtime.Closure.execute(Closure.java:386) ~[?:?]
>     >         at
>     org.apache.felix.gogo.runtime.Pipe.doCall(Pipe.java:417) ~[?:?]
>     >         at org.apache.felix.gogo.runtime.Pipe.call(Pipe.java:229)
>     ~[?:?]
>     >         at org.apache.felix.gogo.runtime.Pipe.call(Pipe.java:59)
>     ~[?:?]
>     >         ... 4 more
>     >
>     > I am getting this error from
>     >
>     https://github.com/cooshal/karaf-flyway/tree/master/db-migrations/flyway-provider
>     >
>     > I also tried installing flyway-core bundle in Karaf, but it did not
>     > work. I got the same error.
>     >
>     > Do I need to configure some settings in the pom file of this project?
>     >
>     (https://github.com/cooshal/karaf-flyway/blob/master/db-migrations/flyway-provider/pom.xml)
>     >
>     > Any feedback would be very helpful.
>     >
>     > Regards,
>     > Cooshal.
> 
>     -- 
>     Jean-Baptiste Onofré
>     jbonofre@apache.org <mailto:jbonofre@apache.org>
>     http://blog.nanthrax.net
>     Talend - http://www.talend.com
> 

-- 
Jean-Baptiste Onofré
jbonofre@apache.org
http://blog.nanthrax.net
Talend - http://www.talend.com

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