[FELIX-5654] The web console plugin init(config) method is invoked for every request to the console

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Not A Bug
• Affects Version/s: webconsole-4.3.4
• Component/s: Web Console
• Assignee: Unassigned
• Reporter: Olaf Otto
• Created: 23/Jun/17 14:17
• Updated: 27/Jun/17 08:35
• Resolved: 27/Jun/17 08:35

Description

I have published a web console plugin (extending AbstractWebConsolePlugin). Before Sling 9, the init(config) method (from the Servlet API) used to be called, as it should, exactly once when the servlet was made available.

Since sling 9, the init method on this singleton gets invoked every time the web console (not just this plugin) is requested.

Here is a stack trace of the init invocation:

...init(...)  
at org.apache.felix.webconsole.internal.servlet.PluginHolder$Plugin.init(PluginHolder.java:497)
at org.apache.felix.webconsole.internal.servlet.PluginHolder$Plugin.getConsolePlugin(PluginHolder.java:600)
at org.apache.felix.webconsole.internal.servlet.PluginHolder$Plugin.doGetCategory(PluginHolder.java:586)
at org.apache.felix.webconsole.internal.servlet.PluginHolder$ServletPlugin.doGetCategory(PluginHolder.java:714)
at org.apache.felix.webconsole.internal.servlet.PluginHolder$Plugin.getCategory(PluginHolder.java:581)
at org.apache.felix.webconsole.internal.servlet.PluginHolder.getLocalizedLabelMap(PluginHolder.java:255)
at org.apache.felix.webconsole.internal.servlet.OsgiManager.service(OsgiManager.java:539)
at org.apache.felix.webconsole.internal.servlet.OsgiManager$3.run(OsgiManager.java:465)
at java.security.AccessController.doPrivileged(AccessController.java:-1)
at org.apache.felix.webconsole.internal.servlet.OsgiManager.service(OsgiManager.java:461)
at org.apache.felix.http.base.internal.handler.ServletHandler.handle(ServletHandler.java:85)
at org.apache.felix.http.base.internal.dispatch.InvocationChain.doFilter(InvocationChain.java:79)
at org.apache.felix.http.sslfilter.internal.SslFilter.doFilter(SslFilter.java:89)
at org.apache.felix.http.base.internal.handler.FilterHandler.handle(FilterHandler.java:135)
at org.apache.felix.http.base.internal.dispatch.InvocationChain.doFilter(InvocationChain.java:74)
at org.apache.sling.i18n.impl.I18NFilter.doFilter(I18NFilter.java:138)
at org.apache.felix.http.base.internal.handler.FilterHandler.handle(FilterHandler.java:135)
at org.apache.felix.http.base.internal.dispatch.InvocationChain.doFilter(InvocationChain.java:74)
at org.apache.felix.http.base.internal.dispatch.Dispatcher.dispatch(Dispatcher.java:128)
at org.apache.felix.http.base.internal.dispatch.DispatcherServlet.service(DispatcherServlet.java:49)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:725)
at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:845)
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:584)
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:224)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1180)
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:512)
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185)
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1112)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:213)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:134)
at org.eclipse.jetty.server.Server.handle(Server.java:534)
at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:320)
at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:251)
at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:283)
at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:110)
at org.eclipse.jetty.io.SelectChannelEndPoint$2.run(SelectChannelEndPoint.java:93)
at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.executeProduceConsume(ExecuteProduceConsume.java:303)
at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.produceConsume(ExecuteProduceConsume.java:148)
at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.run(ExecuteProduceConsume.java:136)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:671)
at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:589)
at java.lang.Thread.run(Thread.java:745)