feat(log): bridge JUL to SLF4J and improve shutdown log reliability

**Route runtime diagnostics into the main logs and reduce log loss during shutdown**

### What Changed
- gRPC and other Java runtime warnings now appear in the application log instead of going only to standard error.
- Database size stats are no longer printed at info level during startup, which reduces log noise.
- Shutdown now waits longer before stopping the log system, giving pending messages more time to flush.
- Async appender now allows up to 5 seconds to drain its queue on shutdown.
- Interrupted shutdowns now show a clearer log message.
- Test log config suppresses verbose ROCKSDB and metrics output (WARN level).
- Logging dependencies were updated to keep the log routing setup aligned.

### Impact
`✅ Fewer missed gRPC error logs`
`✅ Cleaner startup output`
`✅ Fewer lost shutdown logs`

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Co-authored-by: codeant-ai[bot] <151821869+codeant-ai[bot]@users.noreply.github.com>

Author: 3 people

build.gradle

@@ -81,8 +81,9 @@ subprojects {
     }
 
     dependencies {
-        implementation group: 'org.slf4j', name: 'slf4j-api', version: '1.7.25'
-        implementation group: 'org.slf4j', name: 'jcl-over-slf4j', version: '1.7.25'
+        implementation group: 'org.slf4j', name: 'slf4j-api', version: '1.7.36'
+        implementation group: 'org.slf4j', name: 'jcl-over-slf4j', version: '1.7.36'
+        implementation group: 'org.slf4j', name: 'jul-to-slf4j', version: '1.7.36'
         implementation group: 'ch.qos.logback', name: 'logback-classic', version: '1.2.13'
         implementation "com.google.code.findbugs:jsr305:3.0.0"
         implementation group: 'org.springframework', name: 'spring-context', version: "${springVersion}"

chainbase/src/main/java/org/tron/common/storage/metric/DbStat.java

@@ -17,7 +17,7 @@ protected void statProperty() {
         double size = Double.parseDouble(tmp[2]) * 1048576.0;
         Metrics.gaugeSet(MetricKeys.Gauge.DB_SST_LEVEL, files, getEngine(), getName(), level);
         Metrics.gaugeSet(MetricKeys.Gauge.DB_SIZE_BYTES, size, getEngine(), getName(), level);
-        logger.info("DB {}, level:{},files:{},size:{} M",
+        logger.debug("DB {}, level:{},files:{},size:{} M",
             getName(), level, files, size / 1048576.0);
       });
     } catch (Exception e) {

common/src/main/java/org/tron/common/parameter/CommonParameter.java

@@ -6,8 +6,11 @@
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Set;
+import java.util.logging.Level;
+import java.util.logging.Logger;
 import lombok.Getter;
 import lombok.Setter;
+import org.slf4j.bridge.SLF4JBridgeHandler;
 import org.tron.common.args.GenesisBlock;
 import org.tron.common.config.DbBackupConfig;
 import org.tron.common.cron.CronExpression;
@@ -23,6 +26,15 @@
 
 public class CommonParameter {
 
+  // set here for test can work
+  static {
+    SLF4JBridgeHandler.removeHandlersForRootLogger();
+    if (!SLF4JBridgeHandler.isInstalled()) {
+      SLF4JBridgeHandler.install();
+    }
+    Logger.getLogger("io.grpc").setLevel(Level.ALL);
+  }
+
   protected static CommonParameter PARAMETER = new CommonParameter();
 
   // Runtime chain state: set by VMConfig.initVmHardFork()

framework/src/main/java/org/tron/core/config/TronLogShutdownHook.java

@@ -2,7 +2,6 @@
 
 import ch.qos.logback.core.hook.ShutdownHookBase;
 import ch.qos.logback.core.util.Duration;
-import org.tron.program.FullNode;
 
 /**
  * @author kiven
@@ -16,11 +15,16 @@ public class TronLogShutdownHook extends ShutdownHookBase {
   private static final Duration CHECK_SHUTDOWN_DELAY = Duration.buildByMilliseconds(100);
 
   /**
-   * The check times before shutdown.  default is 60000/100 = 600 times.
+   * Maximum time to wait for a graceful application shutdown before forcing
+   * log flush. The thread pool managed by ExecutorServiceManager will be
+   * forcibly shut down after at most 60 seconds, so 180 s gives enough
+   * headroom for all shutdown phases to complete before logs are flushed.
    */
-  private final long  check_times = 60 * 1000 / CHECK_SHUTDOWN_DELAY.getMilliseconds();
+  private static final long MAX_WAIT_MS = 3 * 60 * 1000;
 
-  // if true, shutdown hook will be executed , for example, 'java -jar FullNode.jar -[v|h]'.
+  private final long checkTimes = MAX_WAIT_MS / CHECK_SHUTDOWN_DELAY.getMilliseconds();
+
+  // if true, shutdown hook will be executed, for example, 'java -jar FullNode.jar -[v|h]'.
   public static volatile boolean shutDown = true;
 
   public TronLogShutdownHook() {
@@ -29,16 +33,18 @@ public TronLogShutdownHook() {
   @Override
   public void run() {
     try {
-      for (int i = 0; i < check_times; i++) {
+      for (long i = 0; i < checkTimes; i++) {
         if (shutDown) {
           break;
         }
-        addInfo("Sleeping for " + CHECK_SHUTDOWN_DELAY);
+        if (i % 100 == 0) {
+          addInfo("Waiting for application shutdown... elapsed=" + (i / 10) + "s");
+        }
         Thread.sleep(CHECK_SHUTDOWN_DELAY.getMilliseconds());
       }
     } catch (InterruptedException e) {
       Thread.currentThread().interrupt();
-      addInfo("TronLogShutdownHook run error :" + e.getMessage());
+      addInfo("TronLogShutdownHook interrupted: " + e.getMessage());
     }
     super.stop();
   }

framework/src/main/resources/logback.xml

@@ -61,6 +61,8 @@
     <!-- (the smaller value -> flush occurs often) -->
     <queueSize>100</queueSize>
     <includeCallerData>true</includeCallerData>
+    <!-- Allow up to 5 s to drain the queue on shutdown before giving up -->
+    <maxFlushTime>5000</maxFlushTime>
     <appender-ref ref="FILE"/>
   </appender>
 

framework/src/test/resources/logback-test.xml

@@ -38,5 +38,8 @@
 
   <logger level="DEBUG" name="Test"/>
   <logger level="DEBUG" name="Manager"/>
+  <logger level="WARN" name="ROCKSDB"/>  <!--RocksDB start log is very verbose, so we set it to WARN level-->
+  <logger level="WARN" name="metrics"/> <!--Metrics log is very verbose, so we set it to WARN level-->
+
 
 </configuration>

gradle/verification-metadata.xml

@@ -2198,12 +2198,20 @@
             <sha256 value="bd52ddfaba7afebdf66c39d59a3d08d7fd406ef5c330187cc223ef285b59ca49" origin="Generated by Gradle"/>
          </artifact>
       </component>
-      <component group="org.slf4j" name="jcl-over-slf4j" version="1.7.25">
-         <artifact name="jcl-over-slf4j-1.7.25.jar">
-            <sha256 value="5e938457e79efcbfb3ab64bc29c43ec6c3b95fffcda3c155f4a86cc320c11e14" origin="Generated by Gradle"/>
+      <component group="org.slf4j" name="jcl-over-slf4j" version="1.7.36">
+         <artifact name="jcl-over-slf4j-1.7.36.jar">
+            <sha256 value="ab57ca8fd223772c17365d121f59e94ecbf0ae59d08c03a3cb5b81071c019195" origin="Generated by Gradle"/>
          </artifact>
-         <artifact name="jcl-over-slf4j-1.7.25.pom">
-            <sha256 value="f318976d3d4bd3f36a9bab47af4b17eaf671603e3d7a92e6c67b2004462e0f2d" origin="Generated by Gradle"/>
+         <artifact name="jcl-over-slf4j-1.7.36.pom">
+            <sha256 value="bd96243d7d4218cd7cc7d45c0e30fa13480a1a4f91d356edd7dfe93f1ffb68e6" origin="Generated by Gradle"/>
+         </artifact>
+      </component>
+      <component group="org.slf4j" name="jul-to-slf4j" version="1.7.36">
+         <artifact name="jul-to-slf4j-1.7.36.jar">
+            <sha256 value="9e641fb142c5f0b0623d6222c09ea87523a41bf6bed48ac79940724010b989de" origin="Generated by Gradle"/>
+         </artifact>
+         <artifact name="jul-to-slf4j-1.7.36.pom">
+            <sha256 value="99ff5340c4642a30829d3d98253f123e7a3ef573483164477c88d89d7e6586b7" origin="Generated by Gradle"/>
          </artifact>
       </component>
       <component group="org.slf4j" name="slf4j-api" version="1.7.25">
@@ -2232,21 +2240,6 @@
             <sha256 value="fb046a9c229437928bb11c2d27c8b5d773eb8a25e60cbd253d985210dedc2684" origin="Generated by Gradle"/>
          </artifact>
       </component>
-      <component group="org.slf4j" name="slf4j-parent" version="1.7.25">
-         <artifact name="slf4j-parent-1.7.25.pom">
-            <sha256 value="18f5c52120db036e88d6136f8839c832d074bdda95c756c6f429249d2db54ac6" origin="Generated by Gradle"/>
-         </artifact>
-      </component>
-      <component group="org.slf4j" name="slf4j-parent" version="1.7.30">
-         <artifact name="slf4j-parent-1.7.30.pom">
-            <sha256 value="11647956e48a0c5bfb3ac33f6da7e83f341002b6857efd335a505b687be34b75" origin="Generated by Gradle"/>
-         </artifact>
-      </component>
-      <component group="org.slf4j" name="slf4j-parent" version="1.7.32">
-         <artifact name="slf4j-parent-1.7.32.pom">
-            <sha256 value="5ab349d0f4c7bc08ed0ef1f4d9386cb1940a2f4d6f152150e16dbbecc0b83c70" origin="Generated by Gradle"/>
-         </artifact>
-      </component>
       <component group="org.slf4j" name="slf4j-parent" version="1.7.36">
          <artifact name="slf4j-parent-1.7.36.pom">
             <sha256 value="bb388d37fbcdd3cde64c3cede21838693218dc451f04040c5df360a78ed7e812" origin="Generated by Gradle"/>