Hello!
As far as my understanding goes:
1) It is H2's decision to exhibit JdbcUtil.serializer as their public API,
they have a public system property to override it:
/**
* System property <code>h2.javaObjectSerializer</code>
* (default: null).<br />
* The JavaObjectSerializer class name for java objects being stored in
* column of type OTHER. It must be the same on client and server to work
* correctly.
*/
public static final String JAVA_OBJECT_SERIALIZER =
Utils.getProperty("h2.javaObjectSerializer", null);
Obviously, this is not designed for multi-tenancy of H2 in mind.
If you really need multi-tenancy, I recommend starting H2 in a separate
class loader inherited from root class loader and isolated from any Ignite
classes.
Regards,
--
Ilya Kasnacheev
ср, 18 мар. 2020 г. в 18:54, Andrey Davydov <[email protected]>:
> Hello,
>
>
> org.h2.util.JdbcUtils is utility class with all static methods and
> configured via System.properties. So it system wide resource. It is
> incorrect inject Ignite specific settings in it.
>
>
>
> this - value: org.apache.ignite.internal.IgniteKernal #1
>
> <- grid - class: org.apache.ignite.internal.GridKernalContextImpl,
> value: org.apache.ignite.internal.IgniteKernal #1
>
> <- ctx - class:
> org.apache.ignite.internal.processors.query.h2.IgniteH2Indexing, value:
> org.apache.ignite.internal.GridKernalContextImpl #2
>
> <- this$0 - class:
> org.apache.ignite.internal.processors.query.h2.IgniteH2Indexing$10, value:
> org.apache.ignite.internal.processors.query.h2.IgniteH2Indexing #2
>
> <- serializer - class: org.h2.util.JdbcUtils, value:
> org.apache.ignite.internal.processors.query.h2.IgniteH2Indexing$10 #1
>
> <- [5395] - class: java.lang.Object[], value:
> org.h2.util.JdbcUtils class JdbcUtils
>
> <- elementData - class: java.util.Vector, value:
> java.lang.Object[] #37309
>
> <- classes - class: sun.misc.Launcher$AppClassLoader, value:
> java.util.Vector #31
>
> <- contextClassLoader (thread object) - class:
> java.lang.Thread, value: sun.misc.Launcher$AppClassLoader #1
>
>
>
> 1. It cause problems, if it need to work with H2 databases from same
> JVM where ignite run.
> 2. It cause problems, when some Ignites run in same JVM
> 3. It makes closed IgniteKernal reachable from GC root.
>
>
>
> I think it is bad architecture solution to use this class and use H2
> related system properties at all.
>
>
>
> Andrey.
>
>
>
