zentol commented on a change in pull request #15553:
URL: https://github.com/apache/flink/pull/15553#discussion_r611469882
##########
File path:
flink-streaming-java/src/main/java/org/apache/flink/streaming/api/operators/collect/CollectResultFetcher.java
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@@ -125,7 +127,13 @@ public T next() throws IOException {
try {
response = sendRequest(buffer.getVersion(), requestOffset);
} catch (Exception e) {
- LOG.warn("An exception occurs when fetching query
results", e);
+ if (ExceptionUtils.findThrowable(
+ e,
UnavailableDispatcherOperationException.class)
+ .isPresent()) {
+ LOG.debug("The job execution has not started yet;
cannot fetch results.");
Review comment:
It's difficult to solve, yes. I think we just need to be more conscious
about changing what exceptions we throw; I would hope that in this case,
because it is a fairly specific exception, that we don't have to worry as much.
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