zhijiangW commented on a change in pull request #9854: [FLINK-14230][task]
Change the endInput call of the downstream operator to after the upstream
operator closes
URL: https://github.com/apache/flink/pull/9854#discussion_r338499527
##########
File path:
flink-streaming-java/src/main/java/org/apache/flink/streaming/runtime/tasks/StreamTask.java
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@@ -577,6 +577,13 @@ private void closeAllOperators() throws Exception {
if (operator != null) {
operator.close();
}
+
+ // The operators on the chain, except for the head
operator, must be one-input operators.
+ // So after the upstream operator on the chain is
closed, the input of its downstream operator
+ // reaches the end.
+ if (i > 0) {
+ operatorChain.endOperatorInput(i - 1, 1);
Review comment:
use `operatorChain.endNonHeadOperatorInput(operator)` instead
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