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https://issues.apache.org/jira/browse/IGNITE-12979?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Guo XuBo updated IGNITE-12979:
------------------------------
Component/s: (was: clients)
general
> Peer-class-loading behavior causes the server's metaspace out of memory
> -----------------------------------------------------------------------
>
> Key: IGNITE-12979
> URL: https://issues.apache.org/jira/browse/IGNITE-12979
> Project: Ignite
> Issue Type: Bug
> Components: general
> Affects Versions: 2.7, 2.8, 2.7.5, 2.7.6
> Environment: jdk 8
> server set jvm param -XX:MaxMetaspaceSize=512m
> Reporter: Guo XuBo
> Priority: Major
> Fix For: None
>
>
> In Shared mode deployment, peer-class-loading behavior causes the server to
> run out of memory(metaspace) if the client starts ,sends compute task, , and
> often stops. I dump the JVM heap and found GridDeploymentClassLoader class
> without unloading.I then debugged it locally and found the following code in
> the GridResourceProcessor class, which passed a null value into the
> ioc.descriptor method, causing the GridResourceIoc's taskMap property not to
> store the corresponding information, which in turn caused the
> GridResourceIoc's onUndeploy method not to unload the clsDescs corresponding
> class information (and possibly other references), which caused OOM.
> {code:java}
> //ignite 2.8.0 GridResourceProcessor class 261-267 line
> private void inject(Object obj,
> GridResourceIoc.AnnotationSet annSet,
> @Nullable GridDeployment dep,
> @Nullable Class<?> depCls,
> Object... params)
> throws IgniteCheckedException {
> GridResourceIoc.ClassDescriptor clsDesc = ioc.descriptor(null,
> obj.getClass());
> ……
> }{code}
> Test code:
> {code:java}
> //client code
> public class Task implements IgniteRunnable {
> private int num;
> public Task(int j) {
> this.num = j;
> }
> @Override
> public void run() {
> System.out.println(num);
> }
> }
> {code}
>
> {code:java}
> //client start code
> final IgniteConfiguration configuration = new IgniteConfiguration();
> configuration.setPeerClassLoadingEnabled(true);
> configuration.setClientMode(true);
> for (int i = 0; i < 10000; i++) {
> final Ignite start = Ignition.start(configuration);
> start.compute().run(new Task(i));
> start.close();
> }
> {code}
> {code:java}
> // server -XX:MaxMetaspaceSize=100m
> final IgniteConfiguration igniteConfiguration = new IgniteConfiguration();
> igniteConfiguration.setPeerClassLoadingEnabled(true); final Ignite ignite =
> Ignition.start(igniteConfiguration);
> {code}
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