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lib/storage: harden the check that the original items are sorted after mergeTagToMetricIDsRows fails to preserve sort order

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This commit is contained in:
Aliaksandr Valialkin 2019-10-09 12:13:17 +03:00
parent 2abd5154e0
commit f6334bffa1
1 changed files with 11 additions and 1 deletions
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12
lib/storage/index_db.go
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@ -2289,7 +2289,17 @@ func mergeTagToMetricIDsRows(data []byte, items [][]byte) ([]byte, [][]byte) {
if err := checkItemsSorted(dstItems); err != nil {
logger.Errorf("please report this error at https://github.com/VictoriaMetrics/VictoriaMetrics/issues : %s", err)
dstData = append(dstData[:0], tmm.dataCopy...)
dstItems = append(dstItems[:0], tmm.itemsCopy...)
dstItems = dstItems[:0]
// tmm.itemsCopy can point to overwritten data, so it must be updated
// to point to real data from tmm.dataCopy.
buf := dstData
for _, item := range tmm.itemsCopy {
dstItems = append(dstItems, buf[:len(item)])
buf = buf[len(item):]
}
if err := checkItemsSorted(dstItems); err != nil {
logger.Panicf("BUG: the original items weren't sorted: %s", err)
}
}
putTagToMetricIDsRowsMerger(tmm)
return dstData, dstItems