[GitHub] [beam] Abacn commented on a diff in pull request #25843: fixes:#25841 Improve-error-messages-for-the-validateStateApplicableForInput-method…

["Abacn (via GitHub)" <gi...@apache.org>]

Abacn commented on code in PR #25843:
URL: https://github.com/apache/beam/pull/25843#discussion_r1211686767


##########
sdks/java/core/src/main/java/org/apache/beam/sdk/transforms/ParDo.java:
##########
@@ -446,8 +446,8 @@ private static void validateStateApplicableForInput(PCollection<?> input) {
     } catch (Coder.NonDeterministicException exc) {
       throw new IllegalArgumentException(
           String.format(
-              "%s requires a deterministic key coder in order to use state and timers",
-              ParDo.class.getSimpleName()));
+              "%s requires a deterministic key coder in order to use state and timers, the reason is:\n\t %s",

Review Comment:
   ```suggestion
                 "%s requires a deterministic key coder in order to use state and timers, the reason is:%n %s",
   ```



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