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https://issues.apache.org/jira/browse/IGNITE-18604?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17696153#comment-17696153
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Mikhail Pochatkin commented on IGNITE-18604:
--------------------------------------------
More detailed samples
Before:
!screenshot-3.png!
!screenshot-4.png!
After:
!screenshot-5.png!
!screenshot-6.png!
> Memory Leak in Micronaut
> ------------------------
>
> Key: IGNITE-18604
> URL: https://issues.apache.org/jira/browse/IGNITE-18604
> Project: Ignite
> Issue Type: Improvement
> Reporter: Ivan Bessonov
> Assignee: Mikhail Pochatkin
> Priority: Major
> Labels: ignite-3
> Attachments: screenshot-1.png, screenshot-2.png, screenshot-3.png,
> screenshot-4.png, screenshot-5.png, screenshot-6.png
>
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> Micronaut class code contains the following code:
> {code:java}
> Runtime.getRuntime().addShutdownHook(new Thread(() -> {
> if (LOG.isInfoEnabled()) {
> LOG.info("Embedded Application shutting down");
> }
> if (embeddedApplication.isRunning()) {
> embeddedApplication.stop();
> countDownLatch.countDown();
> if (finalKeepAlive) {
> mainThread.interrupt();
> }
> }
> })); {code}
> This hook is never removed, thus there's a GC root for the
> "embeddedApplication" instance. It leaks beans and other stuff, for example:
> * io.micronaut.runtime.Micronaut#exitHandlers
> * io.micronaut.context.DefaultApplicationContextBuilder#singletons
> * ...
> This is bad, because inside of all of this we have classes like
> ClusterManagementRestFactory and
> ClusterManagementController that refer to Ignite components and have
> particularly big footprints.
>
> As a result, if you run
> org.apache.ignite.internal.rest.ItGeneratedRestClientTest in a loop, it eats
> all the memory.
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