Disable RequireExplicitNullMarking

gradle-baseline-java/src/main/java/com/palantir/baseline/plugins/BaselineNullAway.java

@@ -70,6 +70,9 @@ public void execute(Configuration _files) {
             @Override
             public void execute(ErrorProneOptions options) {
                 options.option("NullAway:AnnotatedPackages", String.join(",", DEFAULT_ANNOTATED_PACKAGES));
+                // 2025-12-04: Disabled to avoid excessive logs
+                // See https://github.com/uber/NullAway/issues/1363
+                options.disable("RequireExplicitNullMarking");
                 // Relax some checks for test code
                 if (options.getCompilingTestOnlyCode().get()) {
                     // NullAway has some poor interactions with mockito and

gradle-baseline-java/src/test/java/com/palantir/baseline/BaselineNullAwayIntegrationTest.java

@@ -124,4 +124,28 @@ void compileJava_succeeds_when_null_away_finds_no_errors(GradleInvoker gradle, R
 
         gradle.withArgs("compileJava").buildsSuccessfully();
     }
+
+    @Test
+    void requireExplicitNullMarking_is_disabled_by_default_to_avoid_excessive_logs(
+            GradleInvoker gradle, RootProject rootProject) {
+        standardBuildFile(rootProject);
+
+        // This file would trigger RequireExplicitNullMarking if it wasn't disabled
+        // because it lacks @NullMarked or @NullUnmarked annotations
+        // See https://github.com/uber/NullAway/issues/1363
+        rootProject.mainSourceSet().java().writeClass("""
+            package com.palantir.test;
+            public class Test {
+                void test() {
+                    String s = "hello";
+                    System.out.println(s);
+                }
+            }
+            """);
+
+        InvocationResult result = gradle.withArgs("compileJava").buildsSuccessfully();
+
+        // The check should be explicitly disabled, so we shouldn't see warnings
+        assertThat(result).output().doesNotContain("[RequireExplicitNullMarking]");
+    }
 }