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filer read empty file may cause OOM in some cases

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fix https://github.com/chrislusf/seaweedfs/issues/2641
This commit is contained in:
chrislu 2022-02-07 23:08:54 -08:00
parent b1cff07ab0
commit 85c1615b43
5 changed files with 10 additions and 16 deletions
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3
weed/command/filer_cat.go
View file

@ -8,7 +8,6 @@ import (
"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
"github.com/chrislusf/seaweedfs/weed/wdclient"
"google.golang.org/grpc"
"math"
"net/url"
"os"
"strings"
@ -115,7 +114,7 @@ func runFilerCat(cmd *Command, args []string) bool {
filerCat.filerClient = client
return filer.StreamContent(&filerCat, writer, respLookupEntry.Entry.Chunks, 0, math.MaxInt64)
return filer.StreamContent(&filerCat, writer, respLookupEntry.Entry.Chunks, 0, int64(filer.FileSize(respLookupEntry.Entry)))
})

6
weed/filer/filer_conf.go
View file

@ -75,12 +75,12 @@ func (fc *FilerConf) loadFromFiler(filer *Filer) (err error) {
return fc.LoadFromBytes(entry.Content)
}
return fc.loadFromChunks(filer, entry.Content, entry.Chunks)
return fc.loadFromChunks(filer, entry.Content, entry.Chunks, entry.Size())
}
func (fc *FilerConf) loadFromChunks(filer *Filer, content []byte, chunks []*filer_pb.FileChunk) (err error) {
func (fc *FilerConf) loadFromChunks(filer *Filer, content []byte, chunks []*filer_pb.FileChunk, size uint64) (err error) {
if len(content) == 0 {
content, err = filer.readEntry(chunks)
content, err = filer.readEntry(chunks, size)
if err != nil {
glog.Errorf("read filer conf content: %v", err)
return

8
weed/filer/filer_on_meta_event.go
View file

@ -2,8 +2,6 @@ package filer
import (
"bytes"
"math"
"github.com/chrislusf/seaweedfs/weed/glog"
"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
"github.com/chrislusf/seaweedfs/weed/util"
@ -55,9 +53,9 @@ func (f *Filer) maybeReloadFilerConfiguration(event *filer_pb.SubscribeMetadataR
}
}
func (f *Filer) readEntry(chunks []*filer_pb.FileChunk) ([]byte, error) {
func (f *Filer) readEntry(chunks []*filer_pb.FileChunk, size uint64) ([]byte, error) {
var buf bytes.Buffer
err := StreamContent(f.MasterClient, &buf, chunks, 0, math.MaxInt64)
err := StreamContent(f.MasterClient, &buf, chunks, 0, int64(size))
if err != nil {
return nil, err
}
@ -66,7 +64,7 @@ func (f *Filer) readEntry(chunks []*filer_pb.FileChunk) ([]byte, error) {
func (f *Filer) reloadFilerConfiguration(entry *filer_pb.Entry) {
fc := NewFilerConf()
err := fc.loadFromChunks(f, entry.Content, entry.Chunks)
err := fc.loadFromChunks(f, entry.Content, entry.Chunks, FileSize(entry))
if err != nil {
glog.Errorf("read filer conf chunks: %v", err)
return

3
weed/filer/read_write.go
View file

@ -4,7 +4,6 @@ import (
"bytes"
"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
"github.com/chrislusf/seaweedfs/weed/wdclient"
"math"
"time"
)
@ -23,7 +22,7 @@ func ReadEntry(masterClient *wdclient.MasterClient, filerClient filer_pb.Seaweed
return err
}
return StreamContent(masterClient, byteBuffer, respLookupEntry.Entry.Chunks, 0, math.MaxInt64)
return StreamContent(masterClient, byteBuffer, respLookupEntry.Entry.Chunks, 0, int64(FileSize(respLookupEntry.Entry)))
}

6
weed/shell/command_fs_cat.go
View file

@ -2,12 +2,10 @@ package shell
import (
"fmt"
"io"
"math"
"github.com/chrislusf/seaweedfs/weed/filer"
"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
"github.com/chrislusf/seaweedfs/weed/util"
"io"
)
func init() {
@ -57,7 +55,7 @@ func (c *commandFsCat) Do(args []string, commandEnv *CommandEnv, writer io.Write
return err
}
return filer.StreamContent(commandEnv.MasterClient, writer, respLookupEntry.Entry.Chunks, 0, math.MaxInt64)
return filer.StreamContent(commandEnv.MasterClient, writer, respLookupEntry.Entry.Chunks, 0, int64(filer.FileSize(respLookupEntry.Entry)))
})