jrwest commented on code in PR #3751:
URL: https://github.com/apache/cassandra/pull/3751#discussion_r1915340814
##########
src/java/org/apache/cassandra/service/snapshot/TableSnapshot.java:
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@@ -490,8 +496,110 @@ private void loadMetadataFromManifest(File manifestFile)
TableSnapshot build()
{
+ maybeCreateOrEnrichManifest();
return new TableSnapshot(keyspaceName, tableName, tableId, tag,
createdAt, expiresAt, snapshotDirs, ephemeral);
}
+
+ private void maybeCreateOrEnrichManifest()
+ {
+ boolean oldManifestExists = false;
+
+ if
(!CassandraRelevantProperties.SNAPSHOT_MANIFEST_ENRICH_OR_CREATE_ENABLED.getBoolean())
+ return;
+
+ // this is caused by not reading any manifest or that snapshot had
a basic manifest just with sstables
+ // enumerated (pre CASSANDRA-16789), so we just go ahead and
enrich it in each snapshot dir
+
+ if (createdAt != null)
+ return;
+
+ for (File snapshotDir : snapshotDirs)
+ {
+ File maybeManifest = new
File(snapshotDir.toPath().resolve("manifest.json"));
+ if (maybeManifest.exists())
+ {
+ oldManifestExists = true;
+ break;
+ }
+ }
+
+ if (oldManifestExists)
+ logger.debug("Manifest in the old format for snapshot {} was
detected, going to enrich it.", this);
Review Comment:
Personally would prefer to see this logged at `info`. It happens very
infrequently so its not a noise risk and its useful to know this is happening
for the operator imo.
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