Handle NullPointerException for getAttributes (#444)

* If a mBean's attributes are null, log it out for debugging. Signed-off-by: Matt Russi <mattrussi@users.noreply.github.com>
prometheus · Oct 23, 2019 · db8b6a8 · db8b6a8
1 parent a46db5a
commit db8b6a8
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/collector/src/main/java/io/prometheus/jmx/JmxScraper.java b/collector/src/main/java/io/prometheus/jmx/JmxScraper.java
@@ -149,6 +149,10 @@ private void scrapeBean(MBeanServerConnection beanConn, ObjectName mbeanName) {
         final AttributeList attributes;
         try {
             attributes = beanConn.getAttributes(mbeanName, name2AttrInfo.keySet().toArray(new String[0]));
+            if (attributes == null) {
+                logScrape(mbeanName.toString(), "getAttributes Fail: attributes are null");
+                return;
+            }
         } catch (Exception e) {
             logScrape(mbeanName, name2AttrInfo.keySet(), "Fail: " + e);
             return;