fix: old tsl files should be compacted without new writes (#22006)

* fix: old tsl files should be compacted wihout new writes

* chore: update changelog.md

CHANGELOG.md

@@ -20,6 +20,7 @@
 -	[#21863](https://github.com/influxdata/influxdb/pull/21863): fix: export example and fix adjacent shards
 -	[#21934](https://github.com/influxdata/influxdb/pull/21934): chore: use community maintained golang-jwt
 -	[#21943](https://github.com/influxdata/influxdb/pull/21943): fix: tsi index should compact old or too-large log files
+-	[#22006](https://github.com/influxdata/influxdb/pull/22006): fix: old tsl files should be compacted without new writes
 -	[#21947](https://github.com/influxdata/influxdb/pull/21947): fix: prevent silently dropped writes with overlapping shards
 -	[#21978](https://github.com/influxdata/influxdb/pull/21978): fix: restore portable backup bug
 

tsdb/index/tsi1/partition.go

@@ -475,6 +475,7 @@ func (p *Partition) prependActiveLogFile() error {
 	manifestSize, err := p.Manifest().Write()
 	if err != nil {
 		// TODO: Close index if write fails.
+		p.logger.Error("manifest write failed, index is potentially damaged", zap.Error(err))
 		return err
 	}
 	p.manifestSize = manifestSize
@@ -959,6 +960,13 @@ func (p *Partition) compact() {
 	fs := p.retainFileSet()
 	defer fs.Release()
 
+	// check if the current active log file should be rolled
+	if p.needsLogCompaction() {
+		if err := p.prependActiveLogFile(); err != nil {
+			p.logger.Error("failed to retire active log file", zap.Error(err))
+		}
+	}
+
 	// compact any non-active log files first
 	for _, f := range p.fileSet.files {
 		if f.Level() == 0 {