+++ This bug was initially created as a clone of Bug #759485 +++ Description of problem: When clicking on live data icon of the resource metric graph portlet, there's a uncaught global exception in the GUI (with no server-side counterpart). java.util.NoSuchElementException:null --- STACK TRACE FOLLOWS --- null at Unknown.java_util_NoSuchElementException_$NoSuchElementException__Ljava_util_NoSuchElementException_2Ljava_util_NoSuchElementException_2(Unknown source:0) at Unknown.java_util_AbstractList$IteratorImpl_$next__Ljava_util_AbstractList$IteratorImpl_2Ljava_lang_Object_2(Unknown source:0) at Unknown.java_util_AbstractHashMap$EntrySetIterator_next__Ljava_lang_Object_2(Unknown source:0) at Unknown.java_util_AbstractMap$1$1_next__Ljava_lang_Object_2(Unknown source:0) at Unknown.org_rhq_enterprise_gui_coregui_client_inventory_resource_detail_monitoring_LiveGraphView$4$1_$onSuccess__Lorg_rhq_enterprise_gui_coregui_client_inventory_resource_detail_monitoring_LiveGraphView$4$1_2Ljava_util_Set_2V(Unknown source:0) at Unknown.org_rhq_enterprise_gui_coregui_client_inventory_resource_detail_monitoring_LiveGraphView$4$1_onSuccess__Ljava_lang_Object_2V(Unknown source:0) at Unknown.com_google_gwt_user_client_rpc_impl_RequestCallbackAdapter_$onResponseReceived__Lcom_google_gwt_user_client_rpc_impl_RequestCallbackAdapter_2Lcom_google_gwt_http_client_Request_2Lcom_google_gwt_http_client_Response_2V(Unknown source:0) at Unknown.org_rhq_enterprise_gui_coregui_client_util_rpc_TrackingRequestCallback_onResponseReceived__Lcom_google_gwt_http_client_Request_2Lcom_google_gwt_http_client_Response_2V(Unknown source:0) at Unknown.com_google_gwt_http_client_Request_$fireOnResponseReceived__Lcom_google_gwt_http_client_Request_2Lcom_google_gwt_http_client_RequestCallback_2V(Unknown source:0) at Unknown.com_google_gwt_http_client_RequestBuilder$1_onReadyStateChange__Lcom_google_gwt_xhr_client_XMLHttpRequest_2V(Unknown source:0) at Unknown.anonymous(Unknown source:0) at Unknown.com_google_gwt_core_client_impl_Impl_entry0__Ljava_lang_Object_2Ljava_lang_Object_2Ljava_lang_Object_2Ljava_lang_Object_2(Unknown source:0) at Unknown.anonymous(Unknown source:0) at Unknown.anonymous(Unknown source:0) Version-Release number of selected component (if applicable): 4.2.0.JON300.CR5 How reproducible: always Steps to Reproduce: 1. Add the "resource metric graph" portlet to dashboard (either global or resource specific) 2. Click on the live data icon in the top-right corner. Actual results: uncaught exception in the message center Expected results: no exceptions Additional info: --- Additional comment from jshaughn on 2011-12-02 13:32:24 EST --- The problem is maybe two-fold. The exception results from not protecting against an empty metric value return. I will fix this. The second problem is that there really shouldn't be an empty value returned. Interestingly, Lukas was just "lucky" in that the graphing actually seems to work for all resource types other than the one he used: CPU. At least all the ones I tried until I asked him what he used :) So, with the fix for problem 1 the graph does not generate an exception but it also does not display any data. I'll look at seeing if CpuComponent can be tweaked to provide something for a live data request. The issue is due to the fact that we already do some complex work to generate CPU metrics. --- Additional comment from jshaughn on 2011-12-02 14:02:41 EST --- master commit 69e2b1d81dc42b0bfc12ee8e32b08d7b2beba38d - Fixed the live graph code to throw out metric requests returning no values so we should be safe from the type of exception reported. - Fixed CpuComponent to return valid data on a live metric request, instead of null, so CPU resources should now give proper live graphs. --- Additional comment from mfoley on 2011-12-12 11:53:35 EST --- verified RHQ 3 master branch
Cherry-pick from master: release/jon3.0.x commit: 34653b7a47a6f3aaea2485928d5f31e0c17f2a94
Moving to ON_QA for testing with JON 3.0.1.GA RC5 or better: https://brewweb.devel.redhat.com//buildinfo?buildID=199114
Verified on JON 3.0.1.GA RC5 (Build Number: dd8a001:fbca611) Verified for global and resource specific "resource metric graph" portlet. Clicking on live data icon displays live graphs.
Bulk closing of old issues in VERIFIED state.