Deprecation warning if Forest pruning is enabled

CHANGELOG.md

@@ -1,5 +1,18 @@
 # Changelog
 
+## 23.10.4
+
+### Breaking Changes
+
+### Deprecations
+- Forest pruning (`pruning-enabled` options) is deprecated and will be removed soon. To save disk space consider switching to Bonsai data storage format [#6230](https://github.com/hyperledger/besu/pull/6230)
+
+### Additions and Improvements
+- Add error messages on authentication failures with username and password [#6212](https://github.com/hyperledger/besu/pull/6212)
+
+### Bug fixes
+
+
 ## 23.10.3
 
 ### Breaking Changes

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

@@ -2059,6 +2059,11 @@ private void issueOptionWarnings() {
           "--privacy-onchain-groups-enabled",
           "--privacy-flexible-groups-enabled");
     }
+
+    if (isPruningEnabled()) {
+      logger.warn(
+          "Forest pruning is deprecated and will be removed soon. To save disk space consider switching to Bonsai data storage format.");
+    }
   }
 
   private void configure() throws Exception {

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

@@ -3815,6 +3815,21 @@ public void pruningParametersAreCaptured() throws Exception {
     assertThat(pruningArg.getValue().getBlockConfirmations()).isEqualTo(4);
   }
 
+  @Test
+  public void pruningLogsDeprecationWarning() {
+    parseCommand("--pruning-enabled");
+
+    verify(mockControllerBuilder).isPruningEnabled(true);
+
+    assertThat(commandOutput.toString(UTF_8)).isEmpty();
+    assertThat(commandErrorOutput.toString(UTF_8)).isEmpty();
+    verify(mockLogger)
+        .warn(
+            contains(
+                "Forest pruning is deprecated and will be removed soon."
+                    + " To save disk space consider switching to Bonsai data storage format."));
+  }
+
   @Test
   public void devModeOptionMustBeUsed() throws Exception {
     parseCommand("--network", "dev");