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ASF subversion and git services commented on WICKET-6965: --------------------------------------------------------- Commit a557238215b0c0652e13d53ae0df7502c6008acc in wicket's branch refs/heads/wicket-8.x from Thomas Heigl [ https://gitbox.apache.org/repos/asf?p=wicket.git;h=a557238215 ] WICKET-6965 Store application name to avoid accessing the session during `onClose` and `onError` (#507) (cherry picked from commit 243f6ffd0124263e5d527a24758c8ab3f76acdfa) > Memory leak in WicketEndpoint > ----------------------------- > > Key: WICKET-6965 > URL: https://issues.apache.org/jira/browse/WICKET-6965 > Project: Wicket > Issue Type: Bug > Components: wicket-native-websocket > Affects Versions: 9.8.0 > Reporter: Thomas Heigl > Assignee: Martin Tzvetanov Grigorov > Priority: Major > Fix For: 10.0.0, 8.14.0, 9.9.0 > > Attachments: image-2022-01-10-18-52-42-193.png, > image-2022-03-21-16-27-37-798.png > > > Our application OOMed yesterday after about 2-3 weeks of continuous uptime. > We normally deploy every other day, so we never noticed this issue before. > The heap dump identified the possible culprit as > {{{}WicketEndpoint$ApplicationListener{}}}: > !image-2022-01-10-18-52-42-193.png! > Every new websocket connection registers a new instance of this application > listener and after a while we ended up with millions of these listeners: > {code:java} > @Override > public void onOpen(Session session, EndpointConfig endpointConfig) > { > String appName = getApplicationName(session); > WebApplication app = (WebApplication) WebApplication.get(appName); > app.getApplicationListeners().add(new > ApplicationListener(applicationDestroyed)); > try > { > ThreadContext.setApplication(app); > javaxWebSocketProcessor = new JavaxWebSocketProcessor(session, app, > endpointConfig); > } > finally > { > ThreadContext.detach(); > } > } > {code} > Instead of creating a new listener for every connection, the listener should > be a singleton. -- This message was sent by Atlassian Jira (v8.20.1#820001)