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Add an additional lookup for a chunk that isn't in the chunk list

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A chunk not in the chunk list may actually exists in two scenarios:
* the chunk may be a special snapshot chunk that contains the chunk sequence,
  so it may be resurrected by the chunk downloader if it had been turned into
  a fossil before
* if the API to list all chunks doesn't return the complete list due to some
  bug

This additional lookup avoid reporting the missing chunk prematurely.
This commit is contained in:
Gilbert Chen
2019-04-21 20:32:21 -04:00
parent 4b69c1162e
commit 1da151f9d9
1 changed files with 15 additions and 1 deletions
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16
src/duplicacy_snapshotmanager.go
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@@ -860,6 +860,20 @@ func (manager *SnapshotManager) CheckSnapshots(snapshotID string, revisionsToChe
_, found := chunkSizeMap[chunkID]
if !found {
// Look up the chunk again in case it actually exists, but only if there aren't
// too many missing chunks.
if missingChunks < 100 {
_, exist, _, err := manager.storage.FindChunk(0, chunkID, false)
if err != nil {
LOG_WARN("SNAPSHOT_VALIDATE", "Failed to check the existence of chunk %s: %v",
chunkID, err)
} else if exist {
LOG_INFO("SNAPSHOT_VALIDATE", "Chunk %s is confirmed to exist", chunkID)
continue
}
}
if !searchFossils {
missingChunks += 1
LOG_WARN("SNAPSHOT_VALIDATE",
@@ -870,7 +884,7 @@ func (manager *SnapshotManager) CheckSnapshots(snapshotID string, revisionsToChe
chunkPath, exist, size, err := manager.storage.FindChunk(0, chunkID, true)
if err != nil {
LOG_ERROR("SNAPSHOT_VALIDATE", "Failed to check the existence of chunk %s: %v",
LOG_ERROR("SNAPSHOT_VALIDATE", "Failed to check the existence of fossil %s: %v",
chunkID, err)
return false
}