xubo guo created IGNITE-12979:
---------------------------------
Summary: 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: clients
Affects Versions: 2.7.6, 2.7.5, 2.8, 2.7
Environment: jdk 8
server set jvm param -XX:MaxMetaspaceSize=512m
Reporter: xubo guo
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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