flyrain commented on a change in pull request #2552:
URL: https://github.com/apache/iceberg/pull/2552#discussion_r625440611
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File path: core/src/main/java/org/apache/iceberg/MergingSnapshotProducer.java
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@@ -390,7 +394,16 @@ protected void validateDataFilesExist(TableMetadata base,
Long startingSnapshotI
@Override
public Object updateEvent() {
long snapshotId = snapshotId();
- long sequenceNumber = ops.refresh().snapshot(snapshotId).sequenceNumber();
+ Snapshot justSaved = ops.refresh().snapshot(snapshotId);
+ long sequenceNumber = 0;
+ if( justSaved == null) {
+ // The snapshot just saved may not be present if the latest metadata
couldn't be loaded due to eventual
+ // consistency problems in refresh.
+ LOG.warn("Failed to load committed snapshot, leave sequence number to
0");
+ } else {
+ sequenceNumber = justSaved.sequenceNumber();
Review comment:
Good catch. Make sense to set it to -1 since its initial value is 0 and
increase monotonically as this line shows
https://github.com/apache/iceberg/blob/9edb1fabc0a4ad4c3f10625c4a15918bf5790f8b/core/src/main/java/org/apache/iceberg/TableMetadata.java#L356
Posted a new commit to fix it.
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