Fix memory pool judge.

apm-sniffer/apm-agent-core/src/main/java/org/skywalking/apm/agent/core/jvm/memorypool/MemoryPoolProvider.java

@@ -39,13 +39,13 @@ public enum MemoryPoolProvider {
             return new ParallelCollectorModule(beans);
         } else if (name.indexOf("CMS") > -1) {
             // CMS collector ( -XX:+UseConcMarkSweepGC )
-            return new CMSCollectorModule(beans);
+            return null;
         } else if (name.indexOf("G1") > -1) {
             // G1 collector ( -XX:+UseG1GC )
             return null;
-        } else if (name.indexOf("Survivor Space") > -1) {
+        } else if (name.equals("Survivor Space")) {
             // Serial collector ( -XX:+UseSerialGC )
-            return null;
+            return new SerialCollectorModule(beans);
         } else {
             // Unknown
             return null;

apm-sniffer/apm-agent-core/src/main/java/org/skywalking/apm/agent/core/jvm/memorypool/CMSCollectorModule.java → apm-sniffer/apm-agent-core/src/main/java/org/skywalking/apm/agent/core/jvm/memorypool/SerialCollectorModule.java

@@ -6,8 +6,8 @@ import java.util.List;
 /**
  * @author wusheng
  */
-public class CMSCollectorModule extends MemoryPoolModule {
-    public CMSCollectorModule(List<MemoryPoolMXBean> beans) {
+public class SerialCollectorModule extends MemoryPoolModule {
+    public SerialCollectorModule(List<MemoryPoolMXBean> beans) {
         super(beans);
     }