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Fix for the lease losses in the PrefetchCache and AsyncGetRecordsStrategy caused due to ExpiredIteratorException #263

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merged 1 commit into from Nov 8, 2017

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sahilpalvia
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This commit includes

  • Fix for ExpiredIteratorException in AsyncGetRecordsStrategy and PrefetchGetRecordsCache.
  • PrefetchGetRecordsCache can restart the iterator, which fetches a new iterator.
  • Unit tests for the changes.

…tegy caused due to ExpiredIteratorException.
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@pfifer pfifer left a comment

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Looks good.

@@ -162,6 +171,14 @@ public void run() {
prefetchCounters.added(processRecordsInput);
} catch (InterruptedException e) {
log.info("Thread was interrupted, indicating shutdown was called on the cache.");
} catch (ExpiredIteratorException e) {
log.info(String.format("ShardId %s: getRecords threw ExpiredIteratorException - restarting"
+ " after greatest seqNum passed to customer", shardId), e);
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This isn't actually true, it restarting from the last accepted sequence number. That may be in the queue waiting to be processed.

@pfifer pfifer merged commit 5c3ff2b into awslabs:master Nov 8, 2017
@sahilpalvia sahilpalvia deleted the prefetch-expirediterator-fix branch November 8, 2017 21:10
@pfifer pfifer added this to the v1.8.8 milestone Nov 8, 2017
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2 participants