diff --git a/framework/src/main/java/org/tron/common/logsfilter/EventPluginLoader.java b/framework/src/main/java/org/tron/common/logsfilter/EventPluginLoader.java
index 7061b2e9d5..c0b7afd677 100644
--- a/framework/src/main/java/org/tron/common/logsfilter/EventPluginLoader.java
+++ b/framework/src/main/java/org/tron/common/logsfilter/EventPluginLoader.java
@@ -3,6 +3,7 @@
 import com.beust.jcommander.internal.Sets;
 import com.fasterxml.jackson.core.JsonProcessingException;
 import com.fasterxml.jackson.databind.ObjectMapper;
+import com.google.common.base.Strings;
 import java.io.File;
 import java.util.HashSet;
 import java.util.List;
@@ -14,8 +15,10 @@
 import org.bouncycastle.util.encoders.Hex;
 import org.pf4j.CompoundPluginDescriptorFinder;
 import org.pf4j.DefaultPluginManager;
+import org.pf4j.DefaultVersionManager;
 import org.pf4j.ManifestPluginDescriptorFinder;
 import org.pf4j.PluginManager;
+import org.pf4j.VersionManager;
 import org.springframework.util.StringUtils;
 import org.tron.common.logsfilter.nativequeue.NativeMessageQueue;
 import org.tron.common.logsfilter.trigger.BlockLogTrigger;
@@ -29,6 +32,16 @@
 @Slf4j
 public class EventPluginLoader {
 
+  /**
+   * Minimum event-plugin Plugin-Version compatible with this node. Bumped to 3.0.0 to
+   * reject pre-fastjson-removal builds whose worker threads would fail with
+   * NoClassDefFoundError on com.alibaba.fastjson at runtime. The previous event-plugin
+   * release is 2.2.0, so 3.0.0 is the first version that ships the Jackson replacement.
+   */
+  static final String MIN_PLUGIN_VERSION = "3.0.0";
+
+  private static final VersionManager VERSION_MANAGER = new DefaultVersionManager();
+
   private static EventPluginLoader instance;
 
   private long MAX_PENDING_SIZE = 50000;
@@ -457,6 +470,10 @@ protected CompoundPluginDescriptorFinder createPluginDescriptorFinder() {
       return false;
     }
 
+    if (!isPluginVersionSupported(pluginManager, pluginId)) {
+      return false;
+    }
+
     pluginManager.startPlugins();
 
     eventListeners = pluginManager.getExtensions(IPluginEventListener.class);
@@ -471,6 +488,21 @@ protected CompoundPluginDescriptorFinder createPluginDescriptorFinder() {
     return true;
   }
 
+  static boolean isPluginVersionSupported(PluginManager pm, String pluginId) {
+    String pluginVersion = pm.getPlugin(pluginId).getDescriptor().getVersion();
+    if (Strings.isNullOrEmpty(pluginVersion)) {
+      return false;
+    }
+    boolean isSupported = VERSION_MANAGER.compareVersions(pluginVersion, MIN_PLUGIN_VERSION) >= 0;
+
+    if (!isSupported) {
+      logger.error(
+          "event-plugin '{}' version {} is older than required {}, please upgrade event-plugin",
+          pluginId, pluginVersion, MIN_PLUGIN_VERSION);
+    }
+    return isSupported;
+  }
+
   public void stopPlugin() {
     if (Objects.nonNull(pluginManager)) {
       pluginManager.stopPlugins();
diff --git a/framework/src/test/java/org/tron/common/logsfilter/EventLoaderTest.java b/framework/src/test/java/org/tron/common/logsfilter/EventLoaderTest.java
index 1e5268ddeb..958af4f7b7 100644
--- a/framework/src/test/java/org/tron/common/logsfilter/EventLoaderTest.java
+++ b/framework/src/test/java/org/tron/common/logsfilter/EventLoaderTest.java
@@ -3,11 +3,16 @@
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
 
 import java.util.ArrayList;
 import java.util.List;
 import org.junit.Assert;
 import org.junit.Test;
+import org.pf4j.PluginDescriptor;
+import org.pf4j.PluginManager;
+import org.pf4j.PluginWrapper;
 import org.tron.common.logsfilter.trigger.BlockLogTrigger;
 import org.tron.common.logsfilter.trigger.TransactionLogTrigger;
 
@@ -48,6 +53,32 @@ public void launchNativeQueue() {
     EventPluginLoader.getInstance().stopPlugin();
   }
 
+  @Test
+  public void testIsPluginVersionSupported() {
+    assertEquals("3.0.0", EventPluginLoader.MIN_PLUGIN_VERSION);
+    // last releases before fastjson removal — must be rejected
+    assertFalse(checkVersion("1.0.0"));
+    assertFalse(checkVersion("2.2.0"));
+    assertFalse(checkVersion("2.9.9"));
+    // 3.0.0 onward — must be accepted
+    assertTrue(checkVersion("3.0.0"));
+    assertTrue(checkVersion("3.1.5"));
+    assertTrue(checkVersion("10.0.0"));
+    // empty/null version — reject
+    assertFalse(checkVersion(""));
+    assertFalse(checkVersion(null));
+  }
+
+  private static boolean checkVersion(String version) {
+    PluginManager pm = mock(PluginManager.class);
+    PluginWrapper wrapper = mock(PluginWrapper.class);
+    PluginDescriptor desc = mock(PluginDescriptor.class);
+    when(pm.getPlugin("test")).thenReturn(wrapper);
+    when(wrapper.getDescriptor()).thenReturn(desc);
+    when(desc.getVersion()).thenReturn(version);
+    return EventPluginLoader.isPluginVersionSupported(pm, "test");
+  }
+
   @Test
   public void testBlockLogTrigger() {
     BlockLogTrigger blt = new BlockLogTrigger();