Fix intermittent ClassCircularityError by preloading ThreadLocalRandom since ByteBuddy 1.12.11 (#718)

Author: yizhouw11

CHANGES.md

@@ -7,6 +7,7 @@ Release Notes.
 
 * Upgrade nats plugin to support 2.16.5
 * Add agent self-observability.
+* Fix intermittent ClassCircularityError by preloading ThreadLocalRandom since ByteBuddy 1.12.11
 
 
 All issues and pull requests are [here](https://github.com/apache/skywalking/milestone/222?closed=1)

apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/plugin/PluginBootstrap.java

@@ -33,6 +33,15 @@
 public class PluginBootstrap {
     private static final ILog LOGGER = LogManager.getLogger(PluginBootstrap.class);
 
+    // Preload ThreadLocalRandom in case of intermittent ClassCircularityError since ByteBuddy 1.12.11
+    static {
+        try {
+            Class.forName("java.util.concurrent.ThreadLocalRandom");
+        } catch (Exception e) {
+            LOGGER.warn(e, "Preload ThreadLocalRandom failure.");
+        }
+    }
+
     /**
      * load all plugins.
      *