I encountered the following error, which appears to be because of a 'not readable' attribute:
2020-06-23 10:02:55,104 DEBUG -- [pool-1-thread-1] i.p.j.s.io.prometheus.jmx.JmxScraper : scrape: 'DefaultDomain.ServiceDirectory:type=ServiceLocator,module=Configuration,name=Conf'_'boot.credentials': not readable |TAGS| |MARKER|
2020-06-23 10:02:55,107 ERROR -- [pool-1-thread-1] i.p.j.s.io.prometheus.jmx.JmxCollector : JMX scrape failed: java.lang.ClassCastException: java.lang.String cannot be cast to javax.management.Attribute
at io.prometheus.jmx.shaded.io.prometheus.jmx.JmxScraper.scrapeBean(JmxScraper.java:156)
at io.prometheus.jmx.shaded.io.prometheus.jmx.JmxScraper.doScrape(JmxScraper.java:117)
at io.prometheus.jmx.shaded.io.prometheus.jmx.JmxCollector.collect(JmxCollector.java:468)
at io.prometheus.jmx.shaded.io.prometheus.client.CollectorRegistry$MetricFamilySamplesEnumeration.findNextElement(CollectorRegistry.java:183)
at io.prometheus.jmx.shaded.io.prometheus.client.CollectorRegistry$MetricFamilySamplesEnumeration.nextElement(CollectorRegistry.java:216)
at io.prometheus.jmx.shaded.io.prometheus.client.CollectorRegistry$MetricFamilySamplesEnumeration.nextElement(CollectorRegistry.java:137)
at io.prometheus.jmx.shaded.io.prometheus.client.exporter.common.TextFormat.write004(TextFormat.java:22)
at io.prometheus.jmx.shaded.io.prometheus.client.exporter.HTTPServer$HTTPMetricHandler.handle(HTTPServer.java:59)
at com.sun.net.httpserver.Filter$Chain.doFilter(Filter.java:79)
at sun.net.httpserver.AuthFilter.doFilter(AuthFilter.java:83)
at com.sun.net.httpserver.Filter$Chain.doFilter(Filter.java:82)
at sun.net.httpserver.ServerImpl$Exchange$LinkHandler.handle(ServerImpl.java:675)
at com.sun.net.httpserver.Filter$Chain.doFilter(Filter.java:79)
at sun.net.httpserver.ServerImpl$Exchange.run(ServerImpl.java:647)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
The problem is that seems like other JMX metrics are affected by this error. This specific JMX with the non-readable value is coming from an external library.
Appreciate any help, thanks.
