Ok, well, i hate to leave it like this but - this is so friggin' odd that I can only say "it is not my fault" :) First - note someone changed jmx exporter code because they saw the same thing as we are - that's what this comment is about: https://github.com/prometheus/jmx_exporter/blob/master/collector/src/main... See: https://github.com/prometheus/jmx_exporter/issues/89 But the fix is not 100%. If you grab these three files - you can see it yourself: https://github.com/jmazzitelli/test/tree/master/javaagent (get Makefile and the two .java files and then run "make download-wildfly unzip-wildfly compile run") You see i use the same API as the jmx exporter here: https://github.com/jmazzitelli/test/blob/master/javaagent/TestJavaAgent.j... and that is what you will see: 16:31:05,290 INFO [stdout] (Test Java Agent Thread) ============================================================= 16:31:05,291 INFO [stdout] (Test Java Agent Thread) FIND INFORMATION ABOUT MBEAN: jboss.as:management-root=server 16:31:05,291 INFO [stdout] (Test Java Agent Thread) ============================================================= 16:31:05,291 INFO [stdout] (Test Java Agent Thread) isRegistered: 16:31:05,291 INFO [stdout] (Test Java Agent Thread) true 16:31:05,291 INFO [stdout] (Test Java Agent Thread) getMBeanInfo: 16:31:05,291 INFO [stdout] (Test Java Agent Thread) description: The root node of the server-level management model. 16:31:05,291 INFO [stdout] (Test Java Agent Thread) #attributes: 19 16:31:05,291 INFO [stdout] (Test Java Agent Thread) getAttribute: 16:31:05,291 INFO [stdout] (Test Java Agent Thread) serverState=reload-required 16:31:05,291 INFO [stdout] (Test Java Agent Thread) queryNames: 16:31:05,291 INFO [stdout] (Test Java Agent Thread) [] 16:31:05,291 INFO [stdout] (Test Java Agent Thread) queryMBeans: 16:31:05,291 INFO [stdout] (Test Java Agent Thread) [] 16:31:05,291 INFO [stdout] (Test Java Agent Thread) queryNames(null, null): 16:31:05,291 INFO [stdout] (Test Java Agent Thread) FOUND IT: jboss.as:management-root=server 16:31:05,291 INFO [stdout] (Test Java Agent Thread) ============================================================= You will see SOME JMX APIs can see the MBean, queryMBeans and queryNames canNOT (note the empty arrays []). But notice getMBeanInfo CAN see it - I can even get the attribute value from that! (you can see it is in reload-required state) But again, queryMBeans returns nothing. Oddly, queryNames(null, null) DOES return it in the list (see the "FOUND IT" line). It is only if I specifically ask for it does it fail in the query API. The end result - JMX Exporter (at least sometimes) is not able to get "Server Availability" because it can't get this MBean. For some odd reason it can get it sometimes - but it seems when it can't, it will never get it.

I will investigate more on this. On Wed, Dec 13, 2017 at 10:49 PM, John Mazzitelli <mazz(a)redhat.com&gt; wrote: > a temporary workaround: in the whitelist of the jmx exporter file, change: > > "jboss.as:management-root=server", > > to: > > "jboss.as:*", > > Once i do that, I see the jmx exporter emitting the server avail metric. > of course, that sucks because it now tells jmx exporter to get every > jboss.as MBean and that causes performance issues. > > ----- Original Message ----- > > Ok, well, i hate to leave it like this but - this is so friggin' odd > that I > > can only say "it is not my fault" :) > > > > First - note someone changed jmx exporter code because they saw the same > > thing as we are - that's what this comment is about: > > > > https://github.com/prometheus/jmx_exporter/blob/master/colle > ctor/src/main/java/io/prometheus/jmx/JmxScraper.java#L110 > > > > See: https://github.com/prometheus/jmx_exporter/issues/89 > > > > But the fix is not 100%. > > > > If you grab these three files - you can see it yourself: > > https://github.com/jmazzitelli/test/tree/master/javaagent > > (get Makefile and the two .java files and then run "make > download-wildfly > > unzip-wildfly compile run") > > > > You see i use the same API as the jmx exporter here: > > https://github.com/jmazzitelli/test/blob/master/javaagent/ > TestJavaAgent.java#L67 > > > > and that is what you will see: > > > > 16:31:05,290 INFO [stdout] (Test Java Agent Thread) > > ============================================================= > > 16:31:05,291 INFO [stdout] (Test Java Agent Thread) FIND INFORMATION > ABOUT > > MBEAN: jboss.as:management-root=server > > 16:31:05,291 INFO [stdout] (Test Java Agent Thread) > > ============================================================= > > 16:31:05,291 INFO [stdout] (Test Java Agent Thread) isRegistered: > > 16:31:05,291 INFO [stdout] (Test Java Agent Thread) true > > 16:31:05,291 INFO [stdout] (Test Java Agent Thread) getMBeanInfo: > > 16:31:05,291 INFO [stdout] (Test Java Agent Thread) description: The > root > > node of the server-level management model. > > 16:31:05,291 INFO [stdout] (Test Java Agent Thread) #attributes: 19 > > 16:31:05,291 INFO [stdout] (Test Java Agent Thread) getAttribute: > > 16:31:05,291 INFO [stdout] (Test Java Agent Thread) > > serverState=reload-required > > 16:31:05,291 INFO [stdout] (Test Java Agent Thread) queryNames: > > 16:31:05,291 INFO [stdout] (Test Java Agent Thread) [] > > 16:31:05,291 INFO [stdout] (Test Java Agent Thread) queryMBeans: > > 16:31:05,291 INFO [stdout] (Test Java Agent Thread) [] > > 16:31:05,291 INFO [stdout] (Test Java Agent Thread) queryNames(null, > null): > > 16:31:05,291 INFO [stdout] (Test Java Agent Thread) FOUND IT: > > jboss.as:management-root=server > > 16:31:05,291 INFO [stdout] (Test Java Agent Thread) > > ============================================================= > > > > > > You will see SOME JMX APIs can see the MBean, queryMBeans and queryNames > > canNOT (note the empty arrays []). > > > > But notice getMBeanInfo CAN see it - I can even get the attribute value > from > > that! (you can see it is in reload-required state) > > > > But again, queryMBeans returns nothing. > > > > Oddly, queryNames(null, null) DOES return it in the list (see the > "FOUND IT" > > line). It is only if I specifically ask for it does it fail in the query > > API. > > > > The end result - JMX Exporter (at least sometimes) is not able to get > "Server > > Availability" because it can't get this MBean. > > > > For some odd reason it can get it sometimes - but it seems when it > can't, it > > will never get it. > > > _______________________________________________ > hawkular-dev mailing list > hawkular-dev(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/hawkular-dev >