Reduce Log4J API Exposures (#5189)

Reduce the number of places that expose Log4J classes as a part of the
interfaces for methods and classes. While Log4j remains the default we
still need to be able to function when the Log4J jars are removed from
the classpath.

Signed-off-by: Danno Ferrin <danno.ferrin@swirldslabs.com>

acceptance-tests/tests/src/test/java/org/hyperledger/besu/tests/acceptance/privacy/PrivacyGroupAcceptanceTest.java

@@ -24,7 +24,7 @@ import org.hyperledger.besu.tests.acceptance.dsl.privacy.PrivacyAcceptanceTestBa
 import org.hyperledger.besu.tests.acceptance.dsl.privacy.PrivacyNode;
 import org.hyperledger.besu.tests.acceptance.dsl.privacy.account.PrivacyAccountResolver;
 import org.hyperledger.besu.tests.web3j.generated.EventEmitter;
-import org.hyperledger.besu.util.Log4j2ConfiguratorUtil;
+import org.hyperledger.besu.util.LogConfigurator;
 import org.hyperledger.enclave.testutil.EnclaveEncryptorType;
 import org.hyperledger.enclave.testutil.EnclaveType;
 
@@ -34,7 +34,6 @@ import java.util.Arrays;
 import java.util.Collection;
 import java.util.Optional;
 
-import org.apache.logging.log4j.Level;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.junit.runners.Parameterized;
@@ -99,7 +98,7 @@ public class PrivacyGroupAcceptanceTest extends PrivacyAcceptanceTestBase {
 
   @Test
   public void nodeCanCreatePrivacyGroup() {
-    Log4j2ConfiguratorUtil.setLevel("", Level.DEBUG);
+    LogConfigurator.setLevel("", "DEBUG");
     final String privacyGroupId =
         alice.execute(
             privacyTransactions.createPrivacyGroup(

besu/src/main/java/org/hyperledger/besu/Besu.java

@@ -62,7 +62,15 @@ public final class Besu {
   }
 
   private static Logger setupLogging() {
-    InternalLoggerFactory.setDefaultFactory(Log4J2LoggerFactory.INSTANCE);
+    try {
+      // This call is to test if log4j classes are available
+      ((Log4J2LoggerFactory) Log4J2LoggerFactory.INSTANCE).newInstance("");
+      InternalLoggerFactory.setDefaultFactory(Log4J2LoggerFactory.INSTANCE);
+    } catch (Throwable t) {
+      System.out.printf(
+          "Could not set netty log4j logger factory: %s - %s%n",
+          t.getClass().getSimpleName(), t.getMessage());
+    }
     try {
       System.setProperty(
           "vertx.logger-delegate-factory-class-name",
@@ -70,10 +78,10 @@ public final class Besu {
       System.setProperty(
           "log4j.configurationFactory", BesuLoggingConfigurationFactory.class.getName());
       System.setProperty("log4j.skipJansi", String.valueOf(false));
-    } catch (SecurityException e) {
-      System.out.println(
-          "Could not set logging system property as the security manager prevented it:"
-              + e.getMessage());
+    } catch (Throwable t) {
+      System.out.printf(
+          "Could not set logging system property: %s - %s%n",
+          t.getClass().getSimpleName(), t.getMessage());
     }
     final Logger logger = LoggerFactory.getLogger(Besu.class);
     Thread.setDefaultUncaughtExceptionHandler(slf4jExceptionHandler(logger));

besu/src/main/java/org/hyperledger/besu/cli/BesuCommand.java

@@ -186,7 +186,7 @@ import org.hyperledger.besu.services.SecurityModuleServiceImpl;
 import org.hyperledger.besu.services.StorageServiceImpl;
 import org.hyperledger.besu.services.kvstore.InMemoryStoragePlugin;
 import org.hyperledger.besu.util.InvalidConfigurationException;
-import org.hyperledger.besu.util.Log4j2ConfiguratorUtil;
+import org.hyperledger.besu.util.LogConfigurator;
 import org.hyperledger.besu.util.NetworkUtility;
 import org.hyperledger.besu.util.PermissioningConfigurationValidator;
 import org.hyperledger.besu.util.number.Fraction;
@@ -240,7 +240,6 @@ import net.consensys.quorum.mainnet.launcher.LauncherManager;
 import net.consensys.quorum.mainnet.launcher.config.ImmutableLauncherConfig;
 import net.consensys.quorum.mainnet.launcher.exception.LauncherException;
 import net.consensys.quorum.mainnet.launcher.util.ParseArgsHelper;
-import org.apache.logging.log4j.Level;
 import org.apache.tuweni.bytes.Bytes;
 import org.apache.tuweni.units.bigints.UInt256;
 import org.slf4j.Logger;
@@ -1440,7 +1439,6 @@ public class BesuCommand implements DefaultCommandValues, Runnable {
    * @param args arguments to Besu command
    * @return success or failure exit code.
    */
-  @VisibleForTesting
   public int parse(
       final IExecutionStrategy resultHandler,
       final BesuParameterExceptionHandler parameterExceptionHandler,
@@ -1553,7 +1551,6 @@ public class BesuCommand implements DefaultCommandValues, Runnable {
   private void registerConverters() {
     commandLine.registerConverter(Address.class, Address::fromHexStringStrict);
     commandLine.registerConverter(Bytes.class, Bytes::fromHexString);
-    commandLine.registerConverter(Level.class, Level::valueOf);
     commandLine.registerConverter(MetricsProtocol.class, MetricsProtocol::fromString);
     commandLine.registerConverter(UInt256.class, (arg) -> UInt256.valueOf(new BigInteger(arg)));
     commandLine.registerConverter(Wei.class, (arg) -> Wei.of(Long.parseUnsignedLong(arg)));
@@ -1796,14 +1793,14 @@ public class BesuCommand implements DefaultCommandValues, Runnable {
    */
   public void configureLogging(final boolean announce) {
     // To change the configuration if color was enabled/disabled
-    Log4j2ConfiguratorUtil.reconfigure();
+    LogConfigurator.reconfigure();
     // set log level per CLI flags
-    final Level logLevel = loggingLevelOption.getLogLevel();
+    final String logLevel = loggingLevelOption.getLogLevel();
     if (logLevel != null) {
       if (announce) {
-        System.out.println("Setting logging level to " + logLevel.name());
+        System.out.println("Setting logging level to " + logLevel);
       }
-      Log4j2ConfiguratorUtil.setAllLevels("", logLevel);
+      LogConfigurator.setLevel("", logLevel);
     }
   }
 
@@ -3109,7 +3106,7 @@ public class BesuCommand implements DefaultCommandValues, Runnable {
                   try {
                     besuPluginContext.stopPlugins();
                     runner.close();
-                    Log4j2ConfiguratorUtil.shutdown();
+                    LogConfigurator.shutdown();
                   } catch (final Exception e) {
                     logger.error("Failed to stop Besu");
                   }
@@ -3306,7 +3303,6 @@ public class BesuCommand implements DefaultCommandValues, Runnable {
    *
    * @return instance of BesuParameterExceptionHandler
    */
-  @VisibleForTesting
   public BesuParameterExceptionHandler parameterExceptionHandler() {
     return new BesuParameterExceptionHandler(this::getLogLevel);
   }
@@ -3454,7 +3450,7 @@ public class BesuCommand implements DefaultCommandValues, Runnable {
   }
 
   @VisibleForTesting
-  Level getLogLevel() {
+  String getLogLevel() {
     return loggingLevelOption.getLogLevel();
   }
 

besu/src/main/java/org/hyperledger/besu/cli/error/BesuParameterExceptionHandler.java

@@ -17,21 +17,20 @@ package org.hyperledger.besu.cli.error;
 import java.io.PrintWriter;
 import java.util.function.Supplier;
 
-import org.apache.logging.log4j.Level;
 import picocli.CommandLine;
 import picocli.CommandLine.Model.CommandSpec;
 
 /** The custom parameter exception handler for Besu PicoCLI. */
 public class BesuParameterExceptionHandler implements CommandLine.IParameterExceptionHandler {
 
-  private final Supplier<Level> levelSupplier;
+  private final Supplier<String> levelSupplier;
 
   /**
    * Instantiates a new Besu parameter exception handler.
    *
    * @param levelSupplier the logging level supplier
    */
-  public BesuParameterExceptionHandler(final Supplier<Level> levelSupplier) {
+  public BesuParameterExceptionHandler(final Supplier<String> levelSupplier) {
     this.levelSupplier = levelSupplier;
   }
 
@@ -39,8 +38,9 @@ public class BesuParameterExceptionHandler implements CommandLine.IParameterExce
   public int handleParseException(final CommandLine.ParameterException ex, final String[] args) {
     final CommandLine cmd = ex.getCommandLine();
     final PrintWriter err = cmd.getErr();
-    final Level logLevel = levelSupplier.get();
-    if (logLevel != null && Level.DEBUG.isMoreSpecificThan(logLevel)) {
+    final String logLevel = levelSupplier.get();
+    if (logLevel != null
+        && (logLevel.equals("DEBUG") || logLevel.equals("TRACE") || logLevel.equals("ALL"))) {
       ex.printStackTrace(err);
     } else {
       err.println(ex.getMessage());

besu/src/main/java/org/hyperledger/besu/cli/options/stable/LoggingLevelOption.java

@@ -16,7 +16,6 @@ package org.hyperledger.besu.cli.options.stable;
 
 import java.util.Set;
 
-import org.apache.logging.log4j.Level;
 import picocli.CommandLine;
 import picocli.CommandLine.Model.CommandSpec;
 import picocli.CommandLine.Spec;
@@ -38,7 +37,7 @@ public class LoggingLevelOption {
   /** The Picocli CommandSpec. Visible for testing. Injected by Picocli framework at runtime. */
   @Spec CommandSpec spec;
 
-  private Level logLevel;
+  private String logLevel;
 
   /**
    * Sets log level.
@@ -52,9 +51,9 @@ public class LoggingLevelOption {
   public void setLogLevel(final String logLevel) {
     if ("FATAL".equalsIgnoreCase(logLevel)) {
       System.out.println("FATAL level is deprecated");
-      this.logLevel = Level.ERROR;
+      this.logLevel = "ERROR";
     } else if (ACCEPTED_VALUES.contains(logLevel.toUpperCase())) {
-      this.logLevel = Level.getLevel(logLevel.toUpperCase());
+      this.logLevel = logLevel.toUpperCase();
     } else {
       throw new CommandLine.ParameterException(
           spec.commandLine(), "Unknown logging value: " + logLevel);
@@ -66,7 +65,7 @@ public class LoggingLevelOption {
    *
    * @return the log level
    */
-  public Level getLogLevel() {
+  public String getLogLevel() {
     return logLevel;
   }
 }

besu/src/main/java/org/hyperledger/besu/cli/subcommands/RetestethSubCommand.java

@@ -24,12 +24,11 @@ import org.hyperledger.besu.cli.util.VersionProvider;
 import org.hyperledger.besu.ethereum.api.jsonrpc.JsonRpcConfiguration;
 import org.hyperledger.besu.ethereum.retesteth.RetestethConfiguration;
 import org.hyperledger.besu.ethereum.retesteth.RetestethService;
-import org.hyperledger.besu.util.Log4j2ConfiguratorUtil;
+import org.hyperledger.besu.util.LogConfigurator;
 
 import java.net.InetAddress;
 import java.nio.file.Path;
 
-import org.apache.logging.log4j.Level;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import picocli.CommandLine.Command;
@@ -106,10 +105,10 @@ public class RetestethSubCommand implements Runnable {
 
   private void prepareLogging() {
     // set log level per CLI flags
-    final Level logLevel = loggingLevelOption.getLogLevel();
+    final String logLevel = loggingLevelOption.getLogLevel();
     if (logLevel != null) {
-      System.out.println("Setting logging level to " + logLevel.name());
-      Log4j2ConfiguratorUtil.setAllLevels("", logLevel);
+      System.out.println("Setting logging level to " + logLevel);
+      LogConfigurator.setLevel("", logLevel);
     }
   }
 
@@ -132,7 +131,7 @@ public class RetestethSubCommand implements Runnable {
                 () -> {
                   try {
                     retestethService.close();
-                    Log4j2ConfiguratorUtil.shutdown();
+                    LogConfigurator.shutdown();
                   } catch (final Exception e) {
                     LOG.error("Failed to stop Besu Retesteth");
                   }

besu/src/test/java/org/hyperledger/besu/cli/BesuCommandTest.java

@@ -123,7 +123,6 @@ import com.google.common.io.Resources;
 import io.vertx.core.json.JsonObject;
 import org.apache.commons.io.FileUtils;
 import org.apache.commons.text.StringEscapeUtils;
-import org.apache.logging.log4j.Level;
 import org.apache.tuweni.bytes.Bytes;
 import org.apache.tuweni.toml.Toml;
 import org.apache.tuweni.toml.TomlParseResult;
@@ -4979,7 +4978,7 @@ public class BesuCommandTest extends CommandTestAbstract {
   public void logLevelIsSetByLoggingOption() {
     final TestBesuCommand command = parseCommand("--logging", "WARN");
 
-    assertThat(command.getLogLevel()).isEqualTo(Level.WARN);
+    assertThat(command.getLogLevel()).isEqualTo("WARN");
   }
 
   @Test

besu/src/test/java/org/hyperledger/besu/cli/options/stable/LoggingLevelOptionTest.java

@@ -39,7 +39,7 @@ public class LoggingLevelOptionTest {
   @Test
   public void fatalLevelEqualsToError() {
     levelOption.setLogLevel("fatal");
-    assertThat(levelOption.getLogLevel()).isEqualTo(Level.ERROR);
+    assertThat(levelOption.getLogLevel()).isEqualTo("ERROR");
   }
 
   @Test
@@ -49,7 +49,7 @@ public class LoggingLevelOptionTest {
         .forEach(
             level -> {
               levelOption.setLogLevel(level.name());
-              assertThat(levelOption.getLogLevel()).isEqualTo(level);
+              assertThat(levelOption.getLogLevel()).isEqualTo(level.name());
             });
   }
 

consensus/merge/src/test/java/org/hyperledger/besu/consensus/merge/blockcreation/MergeReorgTest.java

@@ -41,7 +41,7 @@ import org.hyperledger.besu.ethereum.mainnet.ProtocolSchedule;
 import org.hyperledger.besu.ethereum.mainnet.feemarket.BaseFeeMarket;
 import org.hyperledger.besu.ethereum.mainnet.feemarket.LondonFeeMarket;
 import org.hyperledger.besu.ethereum.worldstate.WorldStateArchive;
-import org.hyperledger.besu.util.Log4j2ConfiguratorUtil;
+import org.hyperledger.besu.util.LogConfigurator;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -109,7 +109,7 @@ public class MergeReorgTest implements MergeGenesisConfigHelper {
   @Test
   public void reorgsAcrossTDDToDifferentTargetsWhenNotFinal() {
     // Add N blocks to chain from genesis, where total diff is < TTD
-    Log4j2ConfiguratorUtil.setLevelDebug(BlockHeaderValidator.class.getName());
+    LogConfigurator.setLevel(BlockHeaderValidator.class.getName(), "DEBUG");
     List<Block> endOfWork = subChain(genesisState.getBlock().getHeader(), 10, Difficulty.of(100L));
     endOfWork.stream().forEach(this::appendBlock);
     assertThat(blockchain.getChainHead().getHeight()).isEqualTo(10L);

ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/AdminChangeLogLevel.java

@@ -21,13 +21,12 @@ import org.hyperledger.besu.ethereum.api.jsonrpc.internal.response.JsonRpcError;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.response.JsonRpcErrorResponse;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.response.JsonRpcResponse;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.response.JsonRpcSuccessResponse;
-import org.hyperledger.besu.util.Log4j2ConfiguratorUtil;
+import org.hyperledger.besu.util.LogConfigurator;
 
 import java.util.Arrays;
 import java.util.Optional;
 import java.util.Set;
 
-import org.apache.logging.log4j.Level;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -45,12 +44,11 @@ public class AdminChangeLogLevel implements JsonRpcMethod {
   @Override
   public JsonRpcResponse response(final JsonRpcRequestContext requestContext) {
     try {
-      final String rawLogLevel = requestContext.getRequiredParameter(0, String.class);
-      if (!VALID_PARAMS.contains(rawLogLevel)) {
+      final String logLevel = requestContext.getRequiredParameter(0, String.class);
+      if (!VALID_PARAMS.contains(logLevel)) {
         return new JsonRpcErrorResponse(
             requestContext.getRequest().getId(), JsonRpcError.INVALID_PARAMS);
       }
-      final Level logLevel = Level.toLevel(rawLogLevel);
       final Optional<String[]> optionalLogFilters =
           requestContext.getOptionalParameter(1, String[].class);
       optionalLogFilters.ifPresentOrElse(
@@ -64,8 +62,8 @@ public class AdminChangeLogLevel implements JsonRpcMethod {
     }
   }
 
-  private void setLogLevel(final String logFilter, final Level logLevel) {
-    LOG.debug("Setting {} logging level to {} ", logFilter, logLevel.name());
-    Log4j2ConfiguratorUtil.setAllLevels(logFilter, logLevel);
+  private void setLogLevel(final String logFilter, final String logLevel) {
+    LOG.debug("Setting {} logging level to {} ", logFilter, logLevel);
+    LogConfigurator.setLevel(logFilter, logLevel);
   }
 }

ethereum/api/src/test/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/AdminChangeLogLevelTest.java

@@ -22,7 +22,7 @@ import org.hyperledger.besu.ethereum.api.jsonrpc.internal.response.JsonRpcError;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.response.JsonRpcErrorResponse;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.response.JsonRpcResponse;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.response.JsonRpcSuccessResponse;
-import org.hyperledger.besu.util.Log4j2ConfiguratorUtil;
+import org.hyperledger.besu.util.LogConfigurator;
 
 import org.apache.logging.log4j.Level;
 import org.junit.Before;
@@ -40,7 +40,7 @@ public class AdminChangeLogLevelTest {
   @Before
   public void before() {
     adminChangeLogLevel = new AdminChangeLogLevel();
-    Log4j2ConfiguratorUtil.setAllLevels("", Level.INFO);
+    LogConfigurator.setLevel("", "INFO");
   }
 
   @Test

ethereum/core/src/test/java/org/hyperledger/besu/ethereum/vm/AbstractRetryingTest.java

@@ -14,7 +14,7 @@
  */
 package org.hyperledger.besu.ethereum.vm;
 
-import org.hyperledger.besu.util.Log4j2ConfiguratorUtil;
+import org.hyperledger.besu.util.LogConfigurator;
 
 import org.junit.Before;
 import org.junit.Test;
@@ -61,7 +61,7 @@ public abstract class AbstractRetryingTest {
     } catch (final RuntimeException | AssertionError e) {
       if (!"trace".equalsIgnoreCase(originalRootLogLevel)
           || !"trace".equalsIgnoreCase(originalEvmLogLevel)) {
-        // try again, this time with more logging so we can capture more information.
+        // try again, this time with more logging, so we can capture more information.
         System.setProperty("root.log.level", "trace");
         System.setProperty("evm.log.level", "trace");
         resetLogging();
@@ -73,7 +73,7 @@ public abstract class AbstractRetryingTest {
   }
 
   private void resetLogging() {
-    Log4j2ConfiguratorUtil.reconfigure();
+    LogConfigurator.reconfigure();
   }
 
   /** Subclasses should implement this method to run the actual JUnit test. */

ethereum/evmtool/build.gradle

@@ -31,7 +31,6 @@ jar {
 }
 
 dependencies {
-  api 'org.slf4j:slf4j-api'
 
   implementation project(':besu')
   implementation project(':config')
@@ -56,7 +55,6 @@ dependencies {
   implementation 'com.google.guava:guava'
   implementation 'info.picocli:picocli'
   implementation 'io.vertx:vertx-core'
-  implementation 'org.apache.logging.log4j:log4j-core'
 
   annotationProcessor 'com.google.dagger:dagger-compiler'
 

ethereum/evmtool/src/main/java/org/hyperledger/besu/evmtool/B11rSubCommand.java

@@ -23,6 +23,7 @@ import org.hyperledger.besu.ethereum.core.BlockHeaderBuilder;
 import org.hyperledger.besu.ethereum.mainnet.MainnetBlockHeaderFunctions;
 import org.hyperledger.besu.ethereum.referencetests.BlockchainReferenceTestCaseSpec.ReferenceTestBlockHeader;
 import org.hyperledger.besu.ethereum.rlp.BytesValueRLPOutput;
+import org.hyperledger.besu.util.LogConfigurator;
 
 import java.io.FileNotFoundException;
 import java.io.FileOutputStream;
@@ -129,6 +130,7 @@ public class B11rSubCommand implements Runnable {
 
   @Override
   public void run() {
+    LogConfigurator.setLevel("", "OFF");
     objectMapper.setDefaultPrettyPrinter(
         (new DefaultPrettyPrinter())
             .withSpacesInObjectEntries()

ethereum/evmtool/src/main/java/org/hyperledger/besu/evmtool/CodeValidateSubCommand.java

@@ -20,6 +20,7 @@ import static org.hyperledger.besu.evmtool.CodeValidateSubCommand.COMMAND_NAME;
 import org.hyperledger.besu.evm.code.CodeFactory;
 import org.hyperledger.besu.evm.code.CodeInvalid;
 import org.hyperledger.besu.evm.code.EOFLayout;
+import org.hyperledger.besu.util.LogConfigurator;
 
 import java.io.BufferedReader;
 import java.io.File;
@@ -68,6 +69,7 @@ public class CodeValidateSubCommand implements Runnable {
 
   @Override
   public void run() {
+    LogConfigurator.setLevel("", "OFF");
     if (cliCode.isEmpty() && codeFile == null) {
       try (BufferedReader in = new BufferedReader(new InputStreamReader(input, UTF_8))) {
         checkCodeFromBufferedReader(in);

ethereum/evmtool/src/main/java/org/hyperledger/besu/evmtool/EvmToolCommand.java

@@ -41,7 +41,7 @@ import org.hyperledger.besu.evm.tracing.OperationTracer;
 import org.hyperledger.besu.evm.tracing.StandardJsonTracer;
 import org.hyperledger.besu.evm.worldstate.WorldState;
 import org.hyperledger.besu.evm.worldstate.WorldUpdater;
-import org.hyperledger.besu.util.Log4j2ConfiguratorUtil;
+import org.hyperledger.besu.util.LogConfigurator;
 
 import java.io.BufferedWriter;
 import java.io.ByteArrayInputStream;
@@ -60,7 +60,6 @@ import java.util.Optional;
 import com.google.common.base.Joiner;
 import com.google.common.base.Stopwatch;
 import io.vertx.core.json.JsonObject;
-import org.apache.logging.log4j.Level;
 import org.apache.tuweni.bytes.Bytes;
 import org.apache.tuweni.bytes.Bytes32;
 import org.apache.tuweni.units.bigints.UInt256;
@@ -251,6 +250,7 @@ public class EvmToolCommand implements Runnable {
 
   @Override
   public void run() {
+    LogConfigurator.setLevel("", "OFF");
     try {
       final EvmToolComponent component =
           DaggerEvmToolComponent.builder()
@@ -285,14 +285,9 @@ public class EvmToolCommand implements Runnable {
               .blockHeaderFunctions(new MainnetBlockHeaderFunctions())
               .buildBlockHeader();
 
-      Log4j2ConfiguratorUtil.setAllLevels("", repeat == 0 ? Level.INFO : Level.OFF);
       int remainingIters = this.repeat;
-      Log4j2ConfiguratorUtil.setLevel(
-          "org.hyperledger.besu.ethereum.mainnet.AbstractProtocolScheduleBuilder", Level.OFF);
       final ProtocolSpec protocolSpec =
           component.getProtocolSpec().apply(BlockHeaderBuilder.createDefault().buildBlockHeader());
-      Log4j2ConfiguratorUtil.setLevel(
-          "org.hyperledger.besu.ethereum.mainnet.AbstractProtocolScheduleBuilder", null);
       final Transaction tx =
           new Transaction(
               0,

ethereum/evmtool/src/main/java/org/hyperledger/besu/evmtool/StateTestSubCommand.java

@@ -44,7 +44,7 @@ import org.hyperledger.besu.evm.tracing.StandardJsonTracer;
 import org.hyperledger.besu.evm.worldstate.WorldState;
 import org.hyperledger.besu.evm.worldstate.WorldUpdater;
 import org.hyperledger.besu.evmtool.exception.UnsupportedForkException;
-import org.hyperledger.besu.util.Log4j2ConfiguratorUtil;
+import org.hyperledger.besu.util.LogConfigurator;
 
 import java.io.BufferedReader;
 import java.io.File;
@@ -62,7 +62,6 @@ import com.fasterxml.jackson.databind.JavaType;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.fasterxml.jackson.databind.node.ObjectNode;
 import com.google.common.base.Stopwatch;
-import org.apache.logging.log4j.Level;
 import org.apache.tuweni.bytes.Bytes;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -107,6 +106,7 @@ public class StateTestSubCommand implements Runnable {
 
   @Override
   public void run() {
+    LogConfigurator.setLevel("", "OFF");
     final ObjectMapper stateTestMapper = new ObjectMapper();
     stateTestMapper.disable(Feature.AUTO_CLOSE_SOURCE);
     final JavaType javaType =
@@ -162,12 +162,7 @@ public class StateTestSubCommand implements Runnable {
   }
 
   private void traceTestSpecs(final String test, final List<GeneralStateTestCaseEipSpec> specs) {
-    Log4j2ConfiguratorUtil.setLevel(
-        "org.hyperledger.besu.ethereum.mainnet.AbstractProtocolScheduleBuilder", Level.OFF);
-    final ReferenceTestProtocolSchedules referenceTestProtocolSchedules =
-        ReferenceTestProtocolSchedules.create();
-    Log4j2ConfiguratorUtil.setLevel(
-        "org.hyperledger.besu.ethereum.mainnet.AbstractProtocolScheduleBuilder", null);
+    final var referenceTestProtocolSchedules = ReferenceTestProtocolSchedules.create();
 
     final OperationTracer tracer = // You should have picked Mercy.
         parentCommand.showJsonResults

ethereum/evmtool/src/main/java/org/hyperledger/besu/evmtool/T8nSubCommand.java

@@ -54,7 +54,7 @@ import org.hyperledger.besu.evm.tracing.StandardJsonTracer;
 import org.hyperledger.besu.evm.worldstate.WorldUpdater;
 import org.hyperledger.besu.evmtool.exception.UnsupportedForkException;
 import org.hyperledger.besu.plugin.data.TransactionType;
-import org.hyperledger.besu.util.Log4j2ConfiguratorUtil;
+import org.hyperledger.besu.util.LogConfigurator;
 
 import java.io.FileOutputStream;
 import java.io.FileReader;
@@ -83,7 +83,6 @@ import com.fasterxml.jackson.databind.node.ArrayNode;
 import com.fasterxml.jackson.databind.node.ObjectNode;
 import com.fasterxml.jackson.databind.node.TextNode;
 import com.google.common.base.Stopwatch;
-import org.apache.logging.log4j.Level;
 import org.apache.tuweni.bytes.Bytes;
 import org.apache.tuweni.bytes.Bytes32;
 import org.apache.tuweni.units.bigints.UInt256;
@@ -187,6 +186,7 @@ public class T8nSubCommand implements Runnable {
 
   @Override
   public void run() {
+    LogConfigurator.setLevel("", "OFF");
     final ObjectMapper objectMapper = new ObjectMapper();
     objectMapper.setDefaultPrettyPrinter(
         (new DefaultPrettyPrinter())
@@ -245,13 +245,9 @@ public class T8nSubCommand implements Runnable {
       return;
     }
 
-    Log4j2ConfiguratorUtil.setLevel(
-        "org.hyperledger.besu.ethereum.mainnet.AbstractProtocolScheduleBuilder", Level.OFF);
     final ReferenceTestProtocolSchedules referenceTestProtocolSchedules =
         ReferenceTestProtocolSchedules.create(
             new StubGenesisConfigOptions().chainId(BigInteger.valueOf(chainId)));
-    Log4j2ConfiguratorUtil.setLevel(
-        "org.hyperledger.besu.ethereum.mainnet.AbstractProtocolScheduleBuilder", null);
 
     final MutableWorldState worldState = new DefaultMutableWorldState(initialWorldState);
 

gradle/verification-metadata.xml

@@ -5355,6 +5355,22 @@
             <sha256 value="8b4e86c53d2783608f1aea213d906c5bac5c0433e00b19239bb16764b9fa3736" origin="Generated by Gradle"/>
          </artifact>
       </component>
+      <component group="org.slf4j" name="slf4j-nop" version="1.7.36">
+         <artifact name="slf4j-nop-1.7.36.jar">
+            <sha256 value="c214958b07816cb4412b30c7bdbd4308ffdc6ba2a83767b8f3a9229cbd9274d6" origin="Generated by Gradle"/>
+         </artifact>
+         <artifact name="slf4j-nop-1.7.36.pom">
+            <sha256 value="20a0f7c060020d75fef4470ae6948661d418ebd5ea4549c68abedf20ee86cb65" origin="Generated by Gradle"/>
+         </artifact>
+      </component>
+      <component group="org.slf4j" name="slf4j-nop" version="2.0.6">
+         <artifact name="slf4j-nop-2.0.6.jar">
+            <sha256 value="7966dcd73078250f38595223b1e807cd7566188a56236def031e265426056fc8" origin="Generated by Gradle"/>
+         </artifact>
+         <artifact name="slf4j-nop-2.0.6.pom">
+            <sha256 value="cd38d631dd836a0820fc715b7c95629de95c89f6598a9b80188c71e120b02fe5" 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"/>

gradle/versions.gradle

@@ -193,6 +193,7 @@ dependencyManagement {
     dependency 'org.rocksdb:rocksdbjni:7.7.3'
 
     dependency 'org.slf4j:slf4j-api:2.0.6'
+    dependency 'org.slf4j:slf4j-nop:2.0.6'
 
     dependency 'org.springframework.security:spring-security-crypto:5.7.2'
 

util/src/main/java/org/hyperledger/besu/util/Log4j2ConfiguratorUtil.java

@@ -14,6 +14,8 @@
  */
 package org.hyperledger.besu.util;
 
+import static java.util.Objects.requireNonNull;
+
 import java.util.Map;
 import java.util.Set;
 
@@ -26,7 +28,7 @@ import org.apache.logging.slf4j.Log4jLoggerFactory;
 import org.slf4j.LoggerFactory;
 
 /** The Log4j2 configurator util. */
-public class Log4j2ConfiguratorUtil {
+class Log4j2ConfiguratorUtil {
 
   private Log4j2ConfiguratorUtil() {}
 
@@ -36,18 +38,20 @@ public class Log4j2ConfiguratorUtil {
    * @param parentLogger the parent logger
    * @param level the level
    */
-  public static void setAllLevels(final String parentLogger, final Level level) {
+  static void setAllLevels(final String parentLogger, final String level) {
     // 1) get logger config
     // 2) if exact match, use it, if not, create it.
     // 3) set level on logger config
     // 4) update child logger configs with level
     // 5) update loggers
+    Level log4JLevel = Level.toLevel(level, null);
+    requireNonNull(log4JLevel);
     final LoggerContext loggerContext = getLoggerContext();
     final Configuration config = loggerContext.getConfiguration();
-    boolean set = setLevel(parentLogger, level, config);
+    boolean set = setLevel(parentLogger, log4JLevel, config);
     for (final Map.Entry<String, LoggerConfig> entry : config.getLoggers().entrySet()) {
       if (entry.getKey().startsWith(parentLogger)) {
-        set |= setLevel(entry.getValue(), level);
+        set |= setLevel(entry.getValue(), log4JLevel);
       }
     }
     if (set) {
@@ -60,8 +64,8 @@ public class Log4j2ConfiguratorUtil {
    *
    * @param loggerName the logger name
    */
-  public static void setLevelDebug(final String loggerName) {
-    setLevel(loggerName, Level.DEBUG);
+  static void setLevelDebug(final String loggerName) {
+    setLevel(loggerName, "DEBUG");
   }
 
   /**
@@ -70,11 +74,13 @@ public class Log4j2ConfiguratorUtil {
    * @param loggerName the logger name
    * @param level the level
    */
-  public static void setLevel(final String loggerName, final Level level) {
+  static void setLevel(final String loggerName, final String level) {
+    Level log4jLevel = Level.toLevel(level, null);
+    requireNonNull(log4jLevel);
     final LoggerContext loggerContext = getLoggerContext();
     if (Strings.isEmpty(loggerName)) {
-      setRootLevel(loggerContext, level);
-    } else if (setLevel(loggerName, level, loggerContext.getConfiguration())) {
+      setRootLevel(loggerContext, log4jLevel);
+    } else if (setLevel(loggerName, log4jLevel, loggerContext.getConfiguration())) {
       loggerContext.updateLoggers();
     }
   }
@@ -111,7 +117,7 @@ public class Log4j2ConfiguratorUtil {
   }
 
   /** Reconfigure. */
-  public static void reconfigure() {
+  static void reconfigure() {
     getLoggerContext().reconfigure();
   }
 
@@ -122,7 +128,7 @@ public class Log4j2ConfiguratorUtil {
   }
 
   /** Shutdown. */
-  public static void shutdown() {
+  static void shutdown() {
     getLoggerContext().terminate();
   }
 }

util/src/main/java/org/hyperledger/besu/util/LogConfigurator.java

@@ -0,0 +1,54 @@
+/*
+ * Copyright contributors to Hyperledger Besu.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
+ * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+package org.hyperledger.besu.util;
+
+import java.util.NoSuchElementException;
+
+/** The library independent logger configurator util. */
+@SuppressWarnings("CatchAndPrintStackTrace")
+public interface LogConfigurator {
+
+  /**
+   * Sets level to specified logger.
+   *
+   * @param parentLogger the logger name
+   * @param level the level
+   */
+  static void setLevel(final String parentLogger, final String level) {
+    try {
+      Log4j2ConfiguratorUtil.setAllLevels(parentLogger, level);
+    } catch (NoClassDefFoundError | ClassCastException | NoSuchElementException e) {
+      // This is expected when Log4j support is not in the classpath, so ignore
+    }
+  }
+
+  /** Reconfigure. */
+  static void reconfigure() {
+    try {
+      Log4j2ConfiguratorUtil.reconfigure();
+    } catch (NoClassDefFoundError | ClassCastException | NoSuchElementException e) {
+      // This is expected when Log4j support is not in the classpath, so ignore
+    }
+  }
+
+  /** Shutdown. */
+  static void shutdown() {
+    try {
+      Log4j2ConfiguratorUtil.shutdown();
+    } catch (NoClassDefFoundError | ClassCastException | NoSuchElementException e) {
+      // This is expected when Log4j support is not in the classpath, so ignore
+    }
+  }
+}