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log panic full stack #7410

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merged 2 commits into from
Oct 13, 2022
Merged

log panic full stack #7410

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9da12b3
log panic full stack
liguozhong Oct 13, 2022
1587678
Merge branch 'main' into log_panic_info
liguozhong Oct 13, 2022
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11 changes: 11 additions & 0 deletions pkg/storage/stores/shipper/util/util.go
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Original file line number Diff line number Diff line change
Expand Up @@ -2,6 +2,8 @@ package util

import (
"fmt"
"os"
"runtime"
"runtime/debug"
"unsafe"

Expand All @@ -11,6 +13,7 @@ import (
"github.com/grafana/loki/pkg/storage/stores/series/index"
)

const maxStackSize = 8 * 1024
const sep = "\xff"

func BuildIndexFileName(tableName, uploader, dbName string) string {
Expand Down Expand Up @@ -48,6 +51,7 @@ func safeOpenBoltDbFile(path string, ret chan *result) {

defer func() {
if r := recover(); r != nil {
logPanic(r)
res.err = fmt.Errorf("recovered from panic opening boltdb file: %v", r)
}

Expand Down Expand Up @@ -85,3 +89,10 @@ func GetUnsafeBytes(s string) []byte {
func GetUnsafeString(buf []byte) string {
return *((*string)(unsafe.Pointer(&buf)))
}

func logPanic(p interface{}) {
stack := make([]byte, maxStackSize)
stack = stack[:runtime.Stack(stack, true)]
// keep a multiline stack
fmt.Fprintf(os.Stderr, "panic: %v\n%s", p, stack)
}