Hello everyone. I have a problem regarding an odd error in the configuration admin. My bundle exposes a metatype with a number of attributes, all of them with cardinality 0 and types of long, integer and short.
I realize that I am using Karaf, but the stacktrace seems to point towards Felix, so here goes: When i register the metatype service and attempt to open the configuration in the webconsole configuration admin, an error window opens: AJAX Errorose <http://localhost:8181/system/console/configMgr#> The request failed: {"pid":"WrapperTypes","title":"WrapperTypes","description":"","properties":{"Long":{"name":"Long","optional":false,"is_set":false,"type":2 When i open the log, i see this exception: 2017-10-22T12:08:36,379 | WARN | qtp514495649-120 | custom | 86 - org.eclipse.jetty.util - 9.3.14.v20161028 | %configMgr.pluginTitle: Error reading configuration PID WrapperTypes java.lang.ArrayIndexOutOfBoundsException: null at java.lang.reflect.Array.get(Native Method) ~[?:?] at org.apache.felix.webconsole.internal.configuration.MetaTypeSupport. attributeToJson(MetaTypeSupport.java:145) [63:org.apache.karaf. webconsole.console:4.1.2] at org.apache.felix.webconsole.internal.configuration. MetaTypeServiceSupport.mergeWithMetaType(MetaTypeServiceSupport.java:291) [63:org.apache.karaf.webconsole.console:4.1.2] at org.apache.felix.webconsole.internal.configuration. ConfigAdminSupport.configForm(ConfigAdminSupport.java:407) [63:org.apache.karaf.webconsole.console:4.1.2] at org.apache.felix.webconsole.internal.configuration.ConfigAdminSupport. printConfigurationJson(ConfigAdminSupport.java:357) [63:org.apache.karaf. webconsole.console:4.1.2] at org.apache.felix.webconsole.internal.configuration.ConfigManager.doPost(ConfigManager.java:203) [63:org.apache.karaf.webconsole.console:4.1.2] at org.apache.felix.webconsole.internal.configuration.ConfigManager.doGet(ConfigManager.java:215) [63:org.apache.karaf.webconsole.console:4.1.2] at javax.servlet.http.HttpServlet.service(HttpServlet.java:687) [13:javax.servlet-api:3.1.0] at javax.servlet.http.HttpServlet.service(HttpServlet.java:790) [13:javax.servlet-api:3.1.0] at org.apache.felix.webconsole.internal.servlet.OsgiManager.service(OsgiManager.java:563) [63:org.apache.karaf.webconsole.console:4.1.2] at org.apache.felix.webconsole.internal.servlet.KarafOsgiManager.doService(KarafOsgiManager.java:78) [63:org.apache.karaf.webconsole.console:4.1.2] at org.apache.felix.webconsole.internal.servlet.KarafOsgiManager$1.run(KarafOsgiManager.java:58) [63:org.apache.karaf.webconsole.console:4.1.2] at java.security.AccessController.doPrivileged(Native Method) ~[?:?] at org.apache.karaf.util.jaas.JaasHelper.doAs(JaasHelper.java:121) [63:org.apache.karaf.webconsole.console:4.1.2] at org.apache.felix.webconsole.internal.servlet.KarafOsgiManager.service(KarafOsgiManager.java:56) [63:org.apache.karaf.webconsole.console:4.1.2] at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:845) [84:org.eclipse.jetty.servlet:9.3.14.v20161028] at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:584) [84:org.eclipse.jetty.servlet:9.3.14.v20161028] at org.ops4j.pax.web.service.jetty.internal.HttpServiceServletHandler. doHandle(HttpServiceServletHandler.java:71) [114:org.ops4j.pax.web.pax- web-jetty:6.0.6] at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143) [83:org.eclipse.jetty.server:9.3.14.v20161028] at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:548) [81:org.eclipse.jetty.security:9.3.14.v20161028] at org.eclipse.jetty.server.session.SessionHandler. doHandle(SessionHandler.java:226) [83:org.eclipse.jetty.server: 9.3.14.v20161028] at org.eclipse.jetty.server.handler.ContextHandler. doHandle(ContextHandler.java:1180) [83:org.eclipse.jetty.server: 9.3.14.v20161028] at org.ops4j.pax.web.service.jetty.internal.HttpServiceContext.doHandle(HttpServiceContext.java:284) [114:org.ops4j.pax.web.pax-web-jetty:6.0.6] at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:512) [84:org.eclipse.jetty.servlet:9.3.14.v20161028] at org.eclipse.jetty.server.session.SessionHandler. doScope(SessionHandler.java:185) [83:org.eclipse.jetty.server: 9.3.14.v20161028] at org.eclipse.jetty.server.handler.ContextHandler. doScope(ContextHandler.java:1112) [83:org.eclipse.jetty.server: 9.3.14.v20161028] at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141) [83:org.eclipse.jetty.server:9.3.14.v20161028] at org.ops4j.pax.web.service.jetty.internal.JettyServerHandlerCollection. handle(JettyServerHandlerCollection.java:80) [114:org.ops4j.pax.web.pax- web-jetty:6.0.6] at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:134) [83:org.eclipse.jetty.server:9.3.14.v20161028] at org.eclipse.jetty.server.Server.handle(Server.java:534) [83:org.eclipse.jetty.server:9.3.14.v20161028] at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:320) [83:org.eclipse.jetty.server:9.3.14.v20161028] at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:251) [83:org.eclipse.jetty.server:9.3.14.v20161028] at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:273) [75:org.eclipse.jetty.io:9.3.14.v20161028] at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:95) [75:org.eclipse.jetty.io:9.3.14.v20161028] at org.eclipse.jetty.io.SelectChannelEndPoint$2.run(SelectChannelEndPoint.java:93) [75:org.eclipse.jetty.io:9.3.14.v20161028] at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume. executeProduceConsume(ExecuteProduceConsume.java:303) [86:org.eclipse.jetty.util:9.3.14.v20161028] at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume. produceConsume(ExecuteProduceConsume.java:148) [86:org.eclipse.jetty.util:9. 3.14.v20161028] at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.run( ExecuteProduceConsume.java:136) [86:org.eclipse.jetty.util:9.3.14.v20161028] at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:671) [86:org.eclipse.jetty.util:9.3.14.v20161028] at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:589) [86:org.eclipse.jetty.util:9.3.14.v20161028] at java.lang.Thread.run(Thread.java:745) [?:?] I have tracked it to the following line in MetaTypeSupport: value = Array.get( value, 0 ); When create a unit test and try some different values i cannot recreate the error Array.get( "", 0 ) Array.get( null, 0 ) Array.get( new String[0], 0 ) None of those calls creates that error: java.lang.ArrayIndexOutOfBoundsException: null The error occurs if there is no configuration file, or if the configuration file exists but does not contain all the configuration items. If i actually add the WrapperTypes.cfg configuration file with all the configuration items defined, the exception does not occur when i open the configuration window in the webconsole and I can edit the configuration as desired. Can anyone shed some light over what on earth happens? I can't see why this happens? The code seems to imply that if cardinality is 0, the default value should have been an empty string: else if ( ad.getCardinality() == 0 ) { value = ""; //$NON-NLS-1$ } and the value should just be set if ( ad.getCardinality() == 0 ) { // scalar if ( isPassword ) { value = PASSWORD_PLACEHOLDER_VALUE; } else if ( value instanceof Vector ) { value = ( ( Vector ) value ).get( 0 ); } else if ( value.getClass().isArray() ) { value = Array.get( value, 0 ); } json.key( "value" ); //$NON-NLS-1$ json.value( value ); } But why on earth do i end up with a value that seems to be an array? Even if i attempt do not give it a configuration, the error still occures, so i don't see what i'm doing wrong? Thanks in advance -Martin
