diff --git a/gradle/validation/jar-checks.gradle b/gradle/validation/jar-checks.gradle
index c6ac5a5c873..29f14d35ff5 100644
--- a/gradle/validation/jar-checks.gradle
+++ b/gradle/validation/jar-checks.gradle
@@ -7,8 +7,8 @@
 import org.apache.commons.codec.digest.DigestUtils
 import org.apache.commons.codec.digest.MessageDigestAlgorithms
 
-// This should be true.
-def failOnError = false
+// This should be false only for debugging.
+def failOnError = true
 
 buildscript {
   repositories {