ccding commented on a change in pull request #10763:
URL: https://github.com/apache/kafka/pull/10763#discussion_r659093901
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File path: core/src/main/scala/kafka/log/LogLoader.scala
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@@ -90,11 +90,63 @@ object LogLoader extends Logging {
* overflow index offset
*/
def load(params: LoadLogParams): LoadedLogOffsets = {
- // first do a pass through the files in the log directory and remove any
temporary files
+
+ // First pass: through the files in the log directory and remove any
temporary files
// and find any interrupted swap operations
val swapFiles = removeTempFilesAndCollectSwapFiles(params)
- // Now do a second pass and load all the log and index files.
+ // The remaining valid swap files must come from compaction or segment
split operation. We can
+ // simply rename them to regular segment files. But, before renaming, we
should figure out which
+ // segments are compacted and delete these segment files: this is done by
calculating min/maxSwapFileOffset.
+ // We store segments that require renaming in this code block, and do the
actual renaming later.
+ var minSwapFileOffset = Long.MaxValue
+ var maxSwapFileOffset = Long.MinValue
+ val toRenameSwapFiles = mutable.Set[File]()
+ swapFiles.filter(f => Log.isLogFile(new
File(CoreUtils.replaceSuffix(f.getPath, SwapFileSuffix, "")))).foreach { f =>
+ val baseOffset = offsetFromFile(f)
+ val segment = LogSegment.open(f.getParentFile,
+ baseOffset = baseOffset,
+ params.config,
+ time = params.time,
+ fileSuffix = Log.SwapFileSuffix)
+ toRenameSwapFiles += f
+ info(s"${params.logIdentifier}Found log file ${f.getPath} from
interrupted swap operation, which is recoverable from ${Log.SwapFileSuffix}
files by renaming.")
+ minSwapFileOffset = Math.min(segment.baseOffset, minSwapFileOffset)
+ maxSwapFileOffset = Math.max(segment.offsetIndex.lastOffset,
maxSwapFileOffset)
Review comment:
How can we get the next segment before finishing the recovery process?
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