keith-turner commented on a change in pull request #2293:
URL: https://github.com/apache/accumulo/pull/2293#discussion_r719774559
##########
File path:
server/gc/src/main/java/org/apache/accumulo/gc/GarbageCollectionAlgorithm.java
##########
@@ -217,11 +222,30 @@ private void confirmDeletes(GarbageCollectionEnvironment
gce,
throw new RuntimeException(
"Scanner over metadata table returned unexpected column : " +
entry.getKey());
}
+ Set<String> tableIdsAfter = gce.getTableIDs();
+ ensureAllTablesChecked(tableIdsBefore, tableIdsSeen, tableIdsAfter);
confirmDeletesFromReplication(gce.getReplicationNeededIterator(),
candidateMap.entrySet().iterator());
}
+ @VisibleForTesting
+ protected void ensureAllTablesChecked(Set<String> tableIdsBefore,
Set<String> tableIdsSeen,
+ Set<String> tableIdsAfter) {
+
+ // if a table was added or deleted during this run, it is acceptable to not
+ // have seen those tables ids when scanning the metadata table. So get the
intersection
+ Set<String> tableIdsMustHaveSeen = new HashSet<>(tableIdsBefore);
+ tableIdsMustHaveSeen.retainAll(tableIdsAfter);
+ // From that intersection, remove all the table ids that were seen.
+ tableIdsMustHaveSeen.removeAll(tableIdsSeen);
+ // If anything is left then we missed a table and may not have removed
rfiles still in use
+ if (tableIdsMustHaveSeen.size() > 0) {
+ throw new RuntimeException("Missed checking tables: " +
tableIdsMustHaveSeen);
Review comment:
```suggestion
throw new RuntimeException("Saw table IDs in ZK that were not in
metadata table: " + tableIdsMustHaveSeen);
```
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