seaweedfs/weed/mount/wfs_filer_client.go
Patrick Schmidt 2ef6ab998c
Avoid race conditions with current filer address (#3474)
When multiple filer requests are in-flight and the current filer
disappears and a new one is selected by the first goroutine, then
there can be a lot of race conditions while retrieving the current
filer.
Therefore, load/save the current filer index atomically.
2022-08-21 12:18:13 -07:00

58 lines
1.3 KiB
Go

package mount
import (
"sync/atomic"
"google.golang.org/grpc"
"github.com/seaweedfs/seaweedfs/weed/glog"
"github.com/seaweedfs/seaweedfs/weed/pb"
"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb"
"github.com/seaweedfs/seaweedfs/weed/util"
)
var _ = filer_pb.FilerClient(&WFS{})
func (wfs *WFS) WithFilerClient(streamingMode bool, fn func(filer_pb.SeaweedFilerClient) error) (err error) {
return util.Retry("filer grpc", func() error {
i := atomic.LoadInt32(&wfs.option.filerIndex)
n := len(wfs.option.FilerAddresses)
for x := 0; x < n; x++ {
filerGrpcAddress := wfs.option.FilerAddresses[i].ToGrpcAddress()
err = pb.WithGrpcClient(streamingMode, func(grpcConnection *grpc.ClientConn) error {
client := filer_pb.NewSeaweedFilerClient(grpcConnection)
return fn(client)
}, filerGrpcAddress, wfs.option.GrpcDialOption)
if err != nil {
glog.V(0).Infof("WithFilerClient %d %v: %v", x, filerGrpcAddress, err)
} else {
atomic.StoreInt32(&wfs.option.filerIndex, i)
return nil
}
i++
if i >= int32(n) {
i = 0
}
}
return err
})
}
func (wfs *WFS) AdjustedUrl(location *filer_pb.Location) string {
if wfs.option.VolumeServerAccess == "publicUrl" {
return location.PublicUrl
}
return location.Url
}
func (wfs *WFS) GetDataCenter() string {
return wfs.option.DataCenter
}