yiguolei commented on code in PR #23863:
URL: https://github.com/apache/doris/pull/23863#discussion_r1316851604
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fe/fe-core/src/main/java/org/apache/doris/qe/Coordinator.java:
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@@ -1252,6 +1253,92 @@ public RowBatch getNext() throws Exception {
return resultBatch;
}
+
+ // We use a very conservative cancel strategy.
+ // 0. If backends has zero process epoch, do not cancel. Zero process
epoch usually arises in cluster upgrading.
+ // 1. If process epoch is same, do not cancel. Means backends does not
restart or die.
+ public boolean shouldCancel(List<Backend> currentBackends) {
+ Map<Long, Backend> curBeMap = Maps.newHashMap();
+ for (Backend be : currentBackends) {
+ curBeMap.put(be.getId(), be);
+ }
+ lock();
Review Comment:
use try (lock()) like RAII in cpp
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