Github user walterddr commented on a diff in the pull request:
https://github.com/apache/flink/pull/5985#discussion_r187460147
--- Diff:
flink-runtime/src/main/java/org/apache/flink/runtime/rest/messages/SubtaskIndexPathParameter.java
---
@@ -44,4 +44,9 @@ protected String convertToString(final Integer value) {
return value.toString();
}
+ @Override
+ public String getDescription() {
+ return "The index of a subtask. Integer value starts from 0,
should be positive.";
--- End diff --
`must be non-negative`, if "0" is valid
---
