Add Support for Java 16, 17

[exalate-issue-sync]

H2OContext.getOrCreate() throws the following exception:

{noformat}java.lang.IllegalAccessError: class ai.h2o.sparkling.backend.utils.RestCommunication (in unnamed module @0x58cb38af) cannot access class sun.net.www.protocol.http.Handler (in module java.base) because module java.base does not export sun.net.www.protocol.http to unnamed module @0x58cb38af
at ai.h2o.sparkling.backend.utils.RestCommunication.resolveUrl(RestCommunication.scala:323)
at ai.h2o.sparkling.backend.utils.RestCommunication.readURLContent(RestCommunication.scala:381)
at ai.h2o.sparkling.backend.utils.RestCommunication.readURLContent$(RestCommunication.scala:370)
at ai.h2o.sparkling.backend.utils.RestApiUtils$.readURLContent(RestApiUtils.scala:96)
at ai.h2o.sparkling.backend.utils.RestCommunication.request(RestCommunication.scala:182)
at ai.h2o.sparkling.backend.utils.RestCommunication.request$(RestCommunication.scala:172)
at ai.h2o.sparkling.backend.utils.RestApiUtils$.request(RestApiUtils.scala:96)
at ai.h2o.sparkling.backend.utils.RestCommunication.update(RestCommunication.scala:88)
at ai.h2o.sparkling.backend.utils.RestCommunication.update$(RestCommunication.scala:81)
at ai.h2o.sparkling.backend.utils.RestApiUtils$.update(RestApiUtils.scala:96)
at ai.h2o.sparkling.backend.utils.H2OContextExtensions.lockCloud(H2OContextExtensions.scala:235)
at ai.h2o.sparkling.backend.utils.H2OContextExtensions.tryToLockCloud(H2OContextExtensions.scala:122)
at ai.h2o.sparkling.backend.utils.H2OContextExtensions.getAndVerifyWorkerNodes(H2OContextExtensions.scala:137)
at ai.h2o.sparkling.backend.utils.H2OContextExtensions.getAndVerifyWorkerNodes$(H2OContextExtensions.scala:131)
at ai.h2o.sparkling.H2OContext.getAndVerifyWorkerNodes(H2OContext.scala:65)
at ai.h2o.sparkling.H2OContext.(H2OContext.scala:85)
at ai.h2o.sparkling.H2OContext$.getOrCreate(H2OContext.scala:479)
at ai.h2o.sparkling.H2OContext$.getOrCreate(H2OContext.scala:491)
... 49 elided
{noformat}

Sparkling Water explicitly sets handlers for creation of http connection. (see [https://h2oai.atlassian.net/browse/SW-2302|https://h2oai.atlassian.net/browse/SW-2302|smart-link] )

{noformat} val handler = if (endpoint.getScheme == "https") {
new sun.net.www.protocol.https.Handler()
} else {
new sun.net.www.protocol.http.Handler()
}
val spec = new URI(endpointWithDelimiter).resolve(suffixWithoutDelimiter).toURL.toString

new URL(null, spec, handler){noformat}

because of the following problem: [https://issues.apache.org/jira/browse/SPARK-25694|https://issues.apache.org/jira/browse/SPARK-25694|smart-link]

[DinukaH2O]

JIRA Issue Migration Info

Jira Issue: SW-2741
Assignee: UNASSIGNED
Reporter: Marek Novotny
State: Open
Fix Version: Backlog
Attachments: N/A
Development PRs: N/A

[hasithjp]

JIRA Issue Migration Info Cont'd

Jira Issue Created Date: 2022-08-29T07:57:35.842-0700