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forget shards that are broken

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This commit is contained in:
Chris Lu 2019-05-31 00:19:13 -07:00
parent aaab2c25f5
commit 689930f092
1 changed files with 19 additions and 7 deletions
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20
weed/storage/store_ec.go
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@ -157,14 +157,18 @@ func (s *Store) readOneEcShardInterval(ctx context.Context, ecVolume *erasure_co
}
} else {
ecVolume.ShardLocationsLock.RLock()
sourceDataNodes, _ := ecVolume.ShardLocations[shardId]
sourceDataNodes, hasShardIdLocation := ecVolume.ShardLocations[shardId]
ecVolume.ShardLocationsLock.RUnlock()
// try reading directly
if hasShardIdLocation {
_, err = s.readRemoteEcShardInterval(ctx, sourceDataNodes, ecVolume.VolumeId, shardId, data, actualOffset)
if err == nil {
return
}
glog.V(0).Infof("clearing ec shard %d.%d locations: %v", ecVolume.VolumeId, shardId, err)
forgetShardId(ecVolume, shardId)
}
// try reading by recovering from other shards
_, err = s.recoverOneRemoteEcShardInterval(ctx, ecVolume, shardId, data, actualOffset)
@ -176,6 +180,13 @@ func (s *Store) readOneEcShardInterval(ctx context.Context, ecVolume *erasure_co
return
}
func forgetShardId(ecVolume *erasure_coding.EcVolume, shardId erasure_coding.ShardId) {
// failed to access the source data nodes, clear it up
ecVolume.ShardLocationsLock.Lock()
delete(ecVolume.ShardLocations, shardId)
ecVolume.ShardLocationsLock.Unlock()
}
func (s *Store) cachedLookupEcShardLocations(ctx context.Context, ecVolume *erasure_coding.EcVolume) (err error) {
if ecVolume.ShardLocationsRefreshTime.Add(10 * time.Minute).After(time.Now()) {
@ -265,7 +276,7 @@ func (s *Store) doReadRemoteEcShardInterval(ctx context.Context, sourceDataNode
}
func (s *Store) recoverOneRemoteEcShardInterval(ctx context.Context, ecVolume *erasure_coding.EcVolume, shardIdToRecover erasure_coding.ShardId, buf []byte, offset int64) (n int, err error) {
glog.V(1).Infof("recover ec shard %d.%d from other locations", ecVolume.VolumeId, shardIdToRecover)
glog.V(4).Infof("recover ec shard %d.%d from other locations", ecVolume.VolumeId, shardIdToRecover)
enc, err := reedsolomon.New(erasure_coding.DataShardsCount, erasure_coding.ParityShardsCount)
if err != nil {
@ -294,7 +305,8 @@ func (s *Store) recoverOneRemoteEcShardInterval(ctx context.Context, ecVolume *e
data := make([]byte, len(buf))
nRead, readErr := s.readRemoteEcShardInterval(ctx, locations, ecVolume.VolumeId, shardId, data, offset)
if readErr != nil {
glog.V(4).Infof("recover: readRemoteEcShardInterval %d.%d %d bytes from %+v: %v", ecVolume.VolumeId, shardId, nRead, locations, readErr)
glog.V(3).Infof("recover: readRemoteEcShardInterval %d.%d %d bytes from %+v: %v", ecVolume.VolumeId, shardId, nRead, locations, readErr)
forgetShardId(ecVolume, shardId)
}
if nRead == len(buf) {
bufs[shardId] = data
@ -309,7 +321,7 @@ func (s *Store) recoverOneRemoteEcShardInterval(ctx context.Context, ecVolume *e
glog.V(3).Infof("recovered ec shard %d.%d failed: %v", ecVolume.VolumeId, shardIdToRecover, err)
return 0, err
}
glog.V(3).Infof("recovered ec shard %d.%d from other locations", ecVolume.VolumeId, shardIdToRecover)
glog.V(4).Infof("recovered ec shard %d.%d from other locations", ecVolume.VolumeId, shardIdToRecover)
copy(buf, bufs[shardIdToRecover])