stevenzwu commented on code in PR #9308:
URL: https://github.com/apache/iceberg/pull/9308#discussion_r1431758647
##########
flink/v1.18/flink/src/main/java/org/apache/iceberg/flink/source/reader/IcebergSourceSplitReader.java:
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@@ -80,6 +88,35 @@ public RecordsWithSplitIds<RecordAndPosition<T>> fetch()
throws IOException {
}
if (currentReader.hasNext()) {
+ if (pausedSplits.contains(currentSplitId)) {
+ // Wait until the reader is unblocked. Wake every second to catch any
missed signal.
+ // Return empty records if wakeUp is called, so pauseOrResumeSplits
could be processed.
+ boolean first = true;
Review Comment:
from the timeline example above, it indicates a condition where the reader
thread can be unnecessary blocked for 1s, which is not ideal. trying to think
if there is anyway we can avoid this suboptimal bhavior.
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