diff --git a/src/main/java/com/google/devtools/build/lib/rules/java/JavaCompileAction.java b/src/main/java/com/google/devtools/build/lib/rules/java/JavaCompileAction.java
index 60f5761ee56377..dbfff94f4a52ca 100644
--- a/src/main/java/com/google/devtools/build/lib/rules/java/JavaCompileAction.java
+++ b/src/main/java/com/google/devtools/build/lib/rules/java/JavaCompileAction.java
@@ -276,6 +276,7 @@ ReducedClasspath getReducedClasspath(
         ImmutableList.copyOf(
             Iterables.filter(
                 transitiveCollection, input -> direct.contains(input.getExecPathString())));
+    System.err.println("Reduced classpath for " + prettyPrint() + ": " + reducedJars);
     return new ReducedClasspath(reducedJars, transitiveCollection.size());
   }
 
@@ -444,6 +445,7 @@ public ActionResult execute(ActionExecutionContext actionExecutionContext)
       return ActionResult.create(primaryResults);
     }
 
+    System.err.println("Failed reduced classpath compilation for " + prettyPrint());
     logger.atInfo().atMostEvery(1, SECONDS).log(
         "Failed reduced classpath compilation for %s", lazy(JavaCompileAction.this::prettyPrint));
     // Fall back to running with the full classpath. This requires first deleting potential