P4 - Replace log from ethereum to bee's own log library (#74)

pkg/shed/db.go

@@ -23,6 +23,7 @@
 package shed
 
 import (
+	"github.com/ethersphere/bee/pkg/logging"
 	"github.com/syndtr/goleveldb/leveldb"
 	"github.com/syndtr/goleveldb/leveldb/iterator"
 	"github.com/syndtr/goleveldb/leveldb/opt"
@@ -39,13 +40,14 @@ const (
 type DB struct {
 	ldb     *leveldb.DB
 	metrics metrics
+	logger  logging.Logger
 	quit    chan struct{} // Quit channel to stop the metrics collection before closing the database
 }
 
 // NewDB constructs a new DB and validates the schema
 // if it exists in database on the given path.
 // metricsPrefix is used for metrics collection for the given DB.
-func NewDB(path string, metricsPrefix string) (db *DB, err error) {
+func NewDB(path string, logger logging.Logger) (db *DB, err error) {
 	ldb, err := leveldb.OpenFile(path, &opt.Options{
 		OpenFilesCacheCapacity: openFileLimit,
 	})
@@ -55,6 +57,7 @@ func NewDB(path string, metricsPrefix string) (db *DB, err error) {
 	db = &DB{
 		ldb:     ldb,
 		metrics: newMetrics(),
+		logger:  logger,
 	}
 
 	if _, err = db.getSchema(); err != nil {
@@ -81,6 +84,7 @@ func NewDB(path string, metricsPrefix string) (db *DB, err error) {
 func (db *DB) Put(key []byte, value []byte) (err error) {
 	err = db.ldb.Put(key, value, nil)
 	if err != nil {
+		db.logger.Debugf("failed to insert in to DB. Error : %s",  err.Error())
 		db.metrics.PutFailCounter.Inc()
 		return err
 	}
@@ -92,9 +96,11 @@ func (db *DB) Put(key []byte, value []byte) (err error) {
 func (db *DB) Get(key []byte) (value []byte, err error) {
 	value, err = db.ldb.Get(key, nil)
 	if err == leveldb.ErrNotFound {
+		db.logger.Debugf("key %s not found during GET", string(key))
 		db.metrics.GetNotFoundCounter.Inc()
 		return nil, err
 	} else {
+		db.logger.Errorf("key %s not found in DB", string(key))
 		db.metrics.GetFailCounter.Inc()
 	}
 	db.metrics.GetCounter.Inc()
@@ -105,6 +111,7 @@ func (db *DB) Get(key []byte) (value []byte, err error) {
 func (db *DB) Has(key []byte) (yes bool, err error) {
 	yes, err = db.ldb.Has(key, nil)
 	if err != nil {
+		db.logger.Debugf("encountered error during HAS of key %s. Error: %s ", string(key), err.Error())
 		db.metrics.HasFailCounter.Inc()
 		return false, err
 	}
@@ -116,6 +123,7 @@ func (db *DB) Has(key []byte) (yes bool, err error) {
 func (db *DB) Delete(key []byte) (err error) {
 	err = db.ldb.Delete(key, nil)
 	if err != nil {
+		db.logger.Debugf("could not DELETE key %s. Error: %s ", string(key), err.Error())
 		db.metrics.DeleteFailCounter.Inc()
 		return err
 	}
@@ -133,6 +141,7 @@ func (db *DB) NewIterator() iterator.Iterator {
 func (db *DB) WriteBatch(batch *leveldb.Batch) (err error) {
 	err = db.ldb.Write(batch, nil)
 	if err != nil {
+		db.logger.Debugf("could not writing batch. Error: %s ", err.Error())
 		db.metrics.WriteBatchFailCounter.Inc()
 		return err
 	}

pkg/shed/db_test.go

@@ -20,6 +20,8 @@ import (
 	"io/ioutil"
 	"os"
 	"testing"
+
+	"github.com/ethersphere/bee/pkg/logging"
 )
 
 // TestNewDB constructs a new DB
@@ -54,12 +56,13 @@ func TestDB_persistence(t *testing.T) {
 		t.Fatal(err)
 	}
 	defer os.RemoveAll(dir)
+	logger := logging.New(ioutil.Discard, 0)
 
-	db, err := NewDB(dir, "")
+	db, err := NewDB(dir, logger)
 	if err != nil {
 		t.Fatal(err)
 	}
-	stringField, err := db.NewStringField("preserve-me")
+	stringField, err := db.NewStringField("preserve-me", logger)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -73,11 +76,11 @@ func TestDB_persistence(t *testing.T) {
 		t.Fatal(err)
 	}
 
-	db2, err := NewDB(dir, "")
+	db2, err := NewDB(dir, logger)
 	if err != nil {
 		t.Fatal(err)
 	}
-	stringField2, err := db2.NewStringField("preserve-me")
+	stringField2, err := db2.NewStringField("preserve-me", logger)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -100,7 +103,8 @@ func newTestDB(t *testing.T) (db *DB, cleanupFunc func()) {
 	if err != nil {
 		t.Fatal(err)
 	}
-	db, err = NewDB(dir, "")
+	logger := logging.New(ioutil.Discard, 0)
+	db, err = NewDB(dir, logger)
 	if err != nil {
 		os.RemoveAll(dir)
 		t.Fatal(err)

pkg/shed/example_store_test.go

@@ -26,7 +26,8 @@ import (
 	"os"
 	"time"
 
-	"github.com/ethersphere/swarm/shed"
+	"github.com/ethersphere/bee/pkg/logging"
+	"github.com/ethersphere/bee/pkg/shed"
 	"github.com/ethersphere/swarm/storage"
 	"github.com/syndtr/goleveldb/leveldb"
 )
@@ -51,7 +52,8 @@ type Store struct {
 // and possible conflicts with schema from existing database is checked
 // automatically.
 func New(path string) (s *Store, err error) {
-	db, err := shed.NewDB(path, "")
+	logger := logging.New(ioutil.Discard, 0)
+	db, err := shed.NewDB(path, logger)
 	if err != nil {
 		return nil, err
 	}
@@ -59,12 +61,12 @@ func New(path string) (s *Store, err error) {
 		db: db,
 	}
 	// Identify current storage schema by arbitrary name.
-	s.schemaName, err = db.NewStringField("schema-name")
+	s.schemaName, err = db.NewStringField("schema-name", logger)
 	if err != nil {
 		return nil, err
 	}
 	// Global ever incrementing index of chunk accesses.
-	s.accessCounter, err = db.NewUint64Field("access-counter")
+	s.accessCounter, err = db.NewUint64Field("access-counter", logger)
 	if err != nil {
 		return nil, err
 	}
@@ -88,7 +90,7 @@ func New(path string) (s *Store, err error) {
 			e.Data = value[8:]
 			return e, nil
 		},
-	})
+	}, logger)
 	if err != nil {
 		return nil, err
 	}
@@ -111,7 +113,7 @@ func New(path string) (s *Store, err error) {
 			e.AccessTimestamp = int64(binary.BigEndian.Uint64(value))
 			return e, nil
 		},
-	})
+	}, logger)
 	if err != nil {
 		return nil, err
 	}
@@ -136,7 +138,7 @@ func New(path string) (s *Store, err error) {
 		DecodeValue: func(keyItem shed.Item, value []byte) (e shed.Item, err error) {
 			return e, nil
 		},
-	})
+	}, logger)
 	if err != nil {
 		return nil, err
 	}

pkg/shed/field_string.go

@@ -17,6 +17,7 @@
 package shed
 
 import (
+	"github.com/ethersphere/bee/pkg/logging"
 	"github.com/syndtr/goleveldb/leveldb"
 )
 
@@ -25,11 +26,12 @@ import (
 type StringField struct {
 	db     *DB
 	key    []byte
+	logger logging.Logger
 }
 
 // NewStringField retruns a new Instance of StringField.
 // It validates its name and type against the database schema.
-func (db *DB) NewStringField(name string) (f StringField, err error) {
+func (db *DB) NewStringField(name string, logger logging.Logger) (f StringField, err error) {
 	key, err := db.schemaFieldKey(name, "string")
 	if err != nil {
 		return f, err
@@ -37,6 +39,7 @@ func (db *DB) NewStringField(name string) (f StringField, err error) {
 	return StringField{
 		db:     db,
 		key:    key,
+		logger: logger,
 	}, nil
 }
 
@@ -47,6 +50,7 @@ func (f StringField) Get() (val string, err error) {
 	b, err := f.db.Get(f.key)
 	if err != nil {
 		if err == leveldb.ErrNotFound {
+			f.logger.Errorf("key %s not found", string(f.key))
 			return "", nil
 		}
 		return "", err

pkg/shed/field_string_test.go

@@ -17,8 +17,10 @@
 package shed
 
 import (
+	"io/ioutil"
 	"testing"
 
+	"github.com/ethersphere/bee/pkg/logging"
 	"github.com/syndtr/goleveldb/leveldb"
 )
 
@@ -28,7 +30,8 @@ func TestStringField(t *testing.T) {
 	db, cleanupFunc := newTestDB(t)
 	defer cleanupFunc()
 
-	simpleString, err := db.NewStringField("simple-string")
+	logger := logging.New(ioutil.Discard, 0)
+	simpleString, err := db.NewStringField("simple-string", logger)
 	if err != nil {
 		t.Fatal(err)
 	}

pkg/shed/field_struct.go

@@ -18,6 +18,8 @@ package shed
 
 import (
 	"encoding/json"
+
+	"github.com/ethersphere/bee/pkg/logging"
 	"github.com/syndtr/goleveldb/leveldb"
 )
 
@@ -26,11 +28,12 @@ import (
 type StructField struct {
 	db     *DB
 	key    []byte
+	logger logging.Logger
 }
 
 // NewStructField returns a new StructField.
 // It validates its name and type against the database schema.
-func (db *DB) NewStructField(name string) (f StructField, err error) {
+func (db *DB) NewStructField(name string, logger logging.Logger) (f StructField, err error) {
 	key, err := db.schemaFieldKey(name, "struct-rlp")
 	if err != nil {
 		return f, err
@@ -38,6 +41,7 @@ func (db *DB) NewStructField(name string) (f StructField, err error) {
 	return StructField{
 		db:     db,
 		key:    key,
+		logger: logger,
 	}, nil
 }
 
@@ -46,6 +50,7 @@ func (db *DB) NewStructField(name string) (f StructField, err error) {
 func (f StructField) Get(val interface{}) (err error) {
 	b, err := f.db.Get(f.key)
 	if err != nil {
+		f.logger.Debugf("could not GET key %s", string(f.key))
 		return err
 	}
 	return json.Unmarshal(b, val)
@@ -55,6 +60,7 @@ func (f StructField) Get(val interface{}) (err error) {
 func (f StructField) Put(val interface{}) (err error) {
 	b, err := json.Marshal(val)
 	if err != nil {
+		f.logger.Debugf("could not PUT key %s", string(f.key))
 		return err
 	}
 	return f.db.Put(f.key, b)
@@ -64,6 +70,7 @@ func (f StructField) Put(val interface{}) (err error) {
 func (f StructField) PutInBatch(batch *leveldb.Batch, val interface{}) (err error) {
 	b, err := json.Marshal(val)
 	if err != nil {
+		f.logger.Debugf("could not PUT key %s in batch", string(f.key))
 		return err
 	}
 	batch.Put(f.key, b)

pkg/shed/field_struct_test.go

@@ -17,8 +17,10 @@
 package shed
 
 import (
+	"io/ioutil"
 	"testing"
 
+	"github.com/ethersphere/bee/pkg/logging"
 	"github.com/syndtr/goleveldb/leveldb"
 )
 
@@ -27,8 +29,8 @@ import (
 func TestStructField(t *testing.T) {
 	db, cleanupFunc := newTestDB(t)
 	defer cleanupFunc()
-
-	complexField, err := db.NewStructField("complex-field")
+	logger := logging.New(ioutil.Discard, 0)
+	complexField, err := db.NewStructField("complex-field", logger)
 	if err != nil {
 		t.Fatal(err)
 	}

pkg/shed/field_uint64.go

@@ -19,6 +19,7 @@ package shed
 import (
 	"encoding/binary"
 
+	"github.com/ethersphere/bee/pkg/logging"
 	"github.com/syndtr/goleveldb/leveldb"
 )
 
@@ -27,11 +28,12 @@ import (
 type Uint64Field struct {
 	db     *DB
 	key    []byte
+	logger logging.Logger
 }
 
 // NewUint64Field returns a new Uint64Field.
 // It validates its name and type against the database schema.
-func (db *DB) NewUint64Field(name string) (f Uint64Field, err error) {
+func (db *DB) NewUint64Field(name string, logger logging.Logger) (f Uint64Field, err error) {
 	key, err := db.schemaFieldKey(name, "uint64")
 	if err != nil {
 		return f, err
@@ -39,6 +41,7 @@ func (db *DB) NewUint64Field(name string) (f Uint64Field, err error) {
 	return Uint64Field{
 		db:     db,
 		key:    key,
+		logger: logger,
 	}, nil
 }
 
@@ -49,6 +52,7 @@ func (f Uint64Field) Get() (val uint64, err error) {
 	b, err := f.db.Get(f.key)
 	if err != nil {
 		if err == leveldb.ErrNotFound {
+			f.logger.Errorf("key %s not found", string(f.key))
 			return 0, nil
 		}
 		return 0, err
@@ -73,8 +77,10 @@ func (f Uint64Field) Inc() (val uint64, err error) {
 	val, err = f.Get()
 	if err != nil {
 		if err == leveldb.ErrNotFound {
+			f.logger.Debugf("key %s not found", string(f.key))
 			val = 0
 		} else {
+			f.logger.Errorf("key %s not found. Error: %s", string(f.key), err.Error())
 			return 0, err
 		}
 	}
@@ -89,8 +95,10 @@ func (f Uint64Field) IncInBatch(batch *leveldb.Batch) (val uint64, err error) {
 	val, err = f.Get()
 	if err != nil {
 		if err == leveldb.ErrNotFound {
+			f.logger.Debugf("key %s not found", string(f.key))
 			val = 0
 		} else {
+			f.logger.Errorf("key %s not found. Error: %s", string(f.key), err.Error())
 			return 0, err
 		}
 	}
@@ -106,8 +114,10 @@ func (f Uint64Field) Dec() (val uint64, err error) {
 	val, err = f.Get()
 	if err != nil {
 		if err == leveldb.ErrNotFound {
+			f.logger.Debugf("key %s not found", string(f.key))
 			val = 0
 		} else {
+			f.logger.Errorf("key %s not found. Error: %s", string(f.key), err.Error())
 			return 0, err
 		}
 	}
@@ -125,8 +135,10 @@ func (f Uint64Field) DecInBatch(batch *leveldb.Batch) (val uint64, err error) {
 	val, err = f.Get()
 	if err != nil {
 		if err == leveldb.ErrNotFound {
+			f.logger.Debugf("key %s not found", string(f.key))
 			val = 0
 		} else {
+			f.logger.Errorf("key %s not found. Error: %s", string(f.key), err.Error())
 			return 0, err
 		}
 	}

pkg/shed/field_uint64_test.go

@@ -17,8 +17,10 @@
 package shed
 
 import (
+	"io/ioutil"
 	"testing"
 
+	"github.com/ethersphere/bee/pkg/logging"
 	"github.com/syndtr/goleveldb/leveldb"
 )
 
@@ -27,8 +29,8 @@ import (
 func TestUint64Field(t *testing.T) {
 	db, cleanupFunc := newTestDB(t)
 	defer cleanupFunc()
-
-	counter, err := db.NewUint64Field("counter")
+	logger := logging.New(ioutil.Discard, 0)
+	counter, err := db.NewUint64Field("counter", logger)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -114,8 +116,8 @@ func TestUint64Field(t *testing.T) {
 func TestUint64Field_Inc(t *testing.T) {
 	db, cleanupFunc := newTestDB(t)
 	defer cleanupFunc()
-
-	counter, err := db.NewUint64Field("counter")
+	logger := logging.New(ioutil.Discard, 0)
+	counter, err := db.NewUint64Field("counter", logger)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -144,8 +146,8 @@ func TestUint64Field_Inc(t *testing.T) {
 func TestUint64Field_IncInBatch(t *testing.T) {
 	db, cleanupFunc := newTestDB(t)
 	defer cleanupFunc()
-
-	counter, err := db.NewUint64Field("counter")
+	logger := logging.New(ioutil.Discard, 0)
+	counter, err := db.NewUint64Field("counter", logger)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -198,8 +200,8 @@ func TestUint64Field_IncInBatch(t *testing.T) {
 func TestUint64Field_Dec(t *testing.T) {
 	db, cleanupFunc := newTestDB(t)
 	defer cleanupFunc()
-
-	counter, err := db.NewUint64Field("counter")
+	logger := logging.New(ioutil.Discard, 0)
+	counter, err := db.NewUint64Field("counter", logger)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -235,8 +237,8 @@ func TestUint64Field_Dec(t *testing.T) {
 func TestUint64Field_DecInBatch(t *testing.T) {
 	db, cleanupFunc := newTestDB(t)
 	defer cleanupFunc()
-
-	counter, err := db.NewUint64Field("counter")
+	logger := logging.New(ioutil.Discard, 0)
+	counter, err := db.NewUint64Field("counter", logger)
 	if err != nil {
 		t.Fatal(err)
 	}

pkg/shed/index.go

@@ -19,6 +19,7 @@ package shed
 import (
 	"bytes"
 
+	"github.com/ethersphere/bee/pkg/logging"
 	"github.com/syndtr/goleveldb/leveldb"
 	"github.com/syndtr/goleveldb/leveldb/iterator"
 )
@@ -82,6 +83,7 @@ func (i Item) Merge(i2 Item) (new Item) {
 // It implements IndexIteratorInterface interface.
 type Index struct {
 	db              *DB
+	logger          logging.Logger
 	prefix          []byte
 	encodeKeyFunc   func(fields Item) (key []byte, err error)
 	decodeKeyFunc   func(key []byte) (e Item, err error)
@@ -101,7 +103,7 @@ type IndexFuncs struct {
 // NewIndex returns a new Index instance with defined name and
 // encoding functions. The name must be unique and will be validated
 // on database schema for a key prefix byte.
-func (db *DB) NewIndex(name string, funcs IndexFuncs) (f Index, err error) {
+func (db *DB) NewIndex(name string, funcs IndexFuncs, logger logging.Logger) (f Index, err error) {
 	id, err := db.schemaIndexPrefix(name)
 	if err != nil {
 		return f, err
@@ -109,6 +111,7 @@ func (db *DB) NewIndex(name string, funcs IndexFuncs) (f Index, err error) {
 	prefix := []byte{id}
 	return Index{
 		db:     db,
+		logger: logger,
 		prefix: prefix,
 		// This function adjusts Index LevelDB key
 		// by appending the provided index id byte.
@@ -138,14 +141,17 @@ func (db *DB) NewIndex(name string, funcs IndexFuncs) (f Index, err error) {
 func (f Index) Get(keyFields Item) (out Item, err error) {
 	key, err := f.encodeKeyFunc(keyFields)
 	if err != nil {
+		f.logger.Debugf("keyfields encoding error in Get. Error: %s", err.Error())
 		return out, err
 	}
 	value, err := f.db.Get(key)
 	if err != nil {
+		f.logger.Debugf("error getting key %s in Get. Error: %s", string(key), err.Error())
 		return out, err
 	}
 	out, err = f.decodeValueFunc(keyFields, value)
 	if err != nil {
+		f.logger.Debugf("error decofing keyfields in Get. Error: %s", err.Error())
 		return out, err
 	}
 	return out.Merge(keyFields), nil
@@ -160,6 +166,7 @@ func (f Index) Get(keyFields Item) (out Item, err error) {
 func (f Index) Fill(items []Item) (err error) {
 	snapshot, err := f.db.ldb.GetSnapshot()
 	if err != nil {
+		f.logger.Debugf("error getting snapshot in Fill. Error: %s", err.Error())
 		return err
 	}
 	defer snapshot.Release()
@@ -167,14 +174,17 @@ func (f Index) Fill(items []Item) (err error) {
 	for i, item := range items {
 		key, err := f.encodeKeyFunc(item)
 		if err != nil {
+			f.logger.Debugf("keyfields encoding error in Fill. Error: %s", err.Error())
 			return err
 		}
 		value, err := snapshot.Get(key, nil)
 		if err != nil {
+			f.logger.Debugf("error getting key %s in Fill. Error: %s", string(key), err.Error())
 			return err
 		}
 		v, err := f.decodeValueFunc(item, value)
 		if err != nil {
+			f.logger.Debugf("error decofing keyfields in Fill . Error: %s", err.Error())
 			return err
 		}
 		items[i] = v.Merge(item)
@@ -188,6 +198,7 @@ func (f Index) Fill(items []Item) (err error) {
 func (f Index) Has(keyFields Item) (bool, error) {
 	key, err := f.encodeKeyFunc(keyFields)
 	if err != nil {
+		f.logger.Debugf("keyfields encoding error in Has. Error: %s", err.Error())
 		return false, err
 	}
 	return f.db.Has(key)
@@ -199,16 +210,19 @@ func (f Index) HasMulti(items ...Item) ([]bool, error) {
 	have := make([]bool, len(items))
 	snapshot, err := f.db.ldb.GetSnapshot()
 	if err != nil {
+		f.logger.Debugf("error getting snapshot in HasMulti. Error: %s", err.Error())
 		return nil, err
 	}
 	defer snapshot.Release()
 	for i, keyFields := range items {
 		key, err := f.encodeKeyFunc(keyFields)
 		if err != nil {
+			f.logger.Debugf("keyfields encoding error in HasMulti. Error: %s", err.Error())
 			return nil, err
 		}
 		have[i], err = snapshot.Has(key, nil)
 		if err != nil {
+			f.logger.Debugf("snaoshot Has error in HasMulti. Error: %s", err.Error())
 			return nil, err
 		}
 	}
@@ -220,10 +234,12 @@ func (f Index) HasMulti(items ...Item) ([]bool, error) {
 func (f Index) Put(i Item) (err error) {
 	key, err := f.encodeKeyFunc(i)
 	if err != nil {
+		f.logger.Debugf("keyfields encoding error in Put. Error: %s", err.Error())
 		return err
 	}
 	value, err := f.encodeValueFunc(i)
 	if err != nil {
+		f.logger.Debugf("keyfields encoding error in Put. Error: %s", err.Error())
 		return err
 	}
 	return f.db.Put(key, value)
@@ -235,10 +251,12 @@ func (f Index) Put(i Item) (err error) {
 func (f Index) PutInBatch(batch *leveldb.Batch, i Item) (err error) {
 	key, err := f.encodeKeyFunc(i)
 	if err != nil {
+		f.logger.Debugf("keyfields encoding error in PutInBatch. Error: %s", err.Error())
 		return err
 	}
 	value, err := f.encodeValueFunc(i)
 	if err != nil {
+		f.logger.Debugf("keyfields encoding error in PutInBatch. Error: %s", err.Error())
 		return err
 	}
 	batch.Put(key, value)
@@ -250,6 +268,7 @@ func (f Index) PutInBatch(batch *leveldb.Batch, i Item) (err error) {
 func (f Index) Delete(keyFields Item) (err error) {
 	key, err := f.encodeKeyFunc(keyFields)
 	if err != nil {
+		f.logger.Debugf("keyfields encoding error in Delete. Error: %s", err.Error())
 		return err
 	}
 	return f.db.Delete(key)
@@ -260,6 +279,7 @@ func (f Index) Delete(keyFields Item) (err error) {
 func (f Index) DeleteInBatch(batch *leveldb.Batch, keyFields Item) (err error) {
 	key, err := f.encodeKeyFunc(keyFields)
 	if err != nil {
+		f.logger.Debugf("keyfields encoding error in DeleteInBatch. Error: %s", err.Error())
 		return err
 	}
 	batch.Delete(key)
@@ -298,6 +318,7 @@ func (f Index) Iterate(fn IndexIterFunc, options *IterateOptions) (err error) {
 		// start from the provided StartFrom Item key value
 		startKey, err = f.encodeKeyFunc(*options.StartFrom)
 		if err != nil {
+			f.logger.Debugf("keyfields encoding error in Iterate. Error: %s", err.Error())
 			return err
 		}
 	}
@@ -307,6 +328,7 @@ func (f Index) Iterate(fn IndexIterFunc, options *IterateOptions) (err error) {
 	// move the cursor to the start key
 	ok := it.Seek(startKey)
 	if !ok {
+		f.logger.Debugf("seek error in Iterate. Error: %s", it.Error())
 		// stop iterator if seek has failed
 		return it.Error()
 	}
@@ -325,6 +347,7 @@ func (f Index) Iterate(fn IndexIterFunc, options *IterateOptions) (err error) {
 		}
 		stop, err := fn(item)
 		if err != nil {
+			f.logger.Debugf("error executing callback function in Iterate. Error: %s", err.Error())
 			return err
 		}
 		if stop {
@@ -359,11 +382,13 @@ func (f Index) itemFromIterator(it iterator.Iterator, totalPrefix []byte) (i Ite
 	// create a copy of key byte slice not to share leveldb underlaying slice array
 	keyItem, err := f.decodeKeyFunc(append([]byte(nil), key...))
 	if err != nil {
+		f.logger.Debugf("error decoding key in itemFromIterator. Error: %s", err.Error())
 		return i, err
 	}
 	// create a copy of value byte slice not to share leveldb underlaying slice array
 	valueItem, err := f.decodeValueFunc(keyItem, append([]byte(nil), it.Value()...))
 	if err != nil {
+		f.logger.Debugf("error decoding value in itemFromIterator. Error: %s", err.Error())
 		return i, err
 	}
 	return keyItem.Merge(valueItem), it.Error()
@@ -435,6 +460,7 @@ func (f Index) Count() (count int, err error) {
 func (f Index) CountFrom(start Item) (count int, err error) {
 	startKey, err := f.encodeKeyFunc(start)
 	if err != nil {
+		f.logger.Debugf("error encoding item in CountFrom. Error: %s", err.Error())
 		return 0, err
 	}
 	it := f.db.NewIterator()

pkg/shed/index_test.go

@@ -20,10 +20,12 @@ import (
 	"bytes"
 	"encoding/binary"
 	"fmt"
+	"io/ioutil"
 	"sort"
 	"testing"
 	"time"
 
+	"github.com/ethersphere/bee/pkg/logging"
 	"github.com/syndtr/goleveldb/leveldb"
 )
 
@@ -53,8 +55,8 @@ var retrievalIndexFuncs = IndexFuncs{
 func TestIndex(t *testing.T) {
 	db, cleanupFunc := newTestDB(t)
 	defer cleanupFunc()
-
-	index, err := db.NewIndex("retrieval", retrievalIndexFuncs)
+	logger := logging.New(ioutil.Discard, 0)
+	index, err := db.NewIndex("retrieval", retrievalIndexFuncs, logger)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -367,8 +369,8 @@ func TestIndex(t *testing.T) {
 func TestIndex_Iterate(t *testing.T) {
 	db, cleanupFunc := newTestDB(t)
 	defer cleanupFunc()
-
-	index, err := db.NewIndex("retrieval", retrievalIndexFuncs)
+	logger := logging.New(ioutil.Discard, 0)
+	index, err := db.NewIndex("retrieval", retrievalIndexFuncs, logger)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -502,7 +504,8 @@ func TestIndex_Iterate(t *testing.T) {
 	})
 
 	t.Run("no overflow", func(t *testing.T) {
-		secondIndex, err := db.NewIndex("second-index", retrievalIndexFuncs)
+		logger := logging.New(ioutil.Discard, 0)
+		secondIndex, err := db.NewIndex("second-index", retrievalIndexFuncs, logger)
 		if err != nil {
 			t.Fatal(err)
 		}
@@ -550,8 +553,8 @@ func TestIndex_Iterate(t *testing.T) {
 func TestIndex_Iterate_withPrefix(t *testing.T) {
 	db, cleanupFunc := newTestDB(t)
 	defer cleanupFunc()
-
-	index, err := db.NewIndex("retrieval", retrievalIndexFuncs)
+	logger := logging.New(ioutil.Discard, 0)
+	index, err := db.NewIndex("retrieval", retrievalIndexFuncs, logger)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -697,7 +700,8 @@ func TestIndex_Iterate_withPrefix(t *testing.T) {
 	})
 
 	t.Run("no overflow", func(t *testing.T) {
-		secondIndex, err := db.NewIndex("second-index", retrievalIndexFuncs)
+		logger := logging.New(ioutil.Discard, 0)
+		secondIndex, err := db.NewIndex("second-index", retrievalIndexFuncs, logger)
 		if err != nil {
 			t.Fatal(err)
 		}
@@ -737,8 +741,8 @@ func TestIndex_Iterate_withPrefix(t *testing.T) {
 func TestIndex_count(t *testing.T) {
 	db, cleanupFunc := newTestDB(t)
 	defer cleanupFunc()
-
-	index, err := db.NewIndex("retrieval", retrievalIndexFuncs)
+	logger := logging.New(ioutil.Discard, 0)
+	index, err := db.NewIndex("retrieval", retrievalIndexFuncs, logger)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -907,8 +911,8 @@ func checkItem(t *testing.T, got, want Item) {
 func TestIndex_firstAndLast(t *testing.T) {
 	db, cleanupFunc := newTestDB(t)
 	defer cleanupFunc()
-
-	index, err := db.NewIndex("retrieval", retrievalIndexFuncs)
+	logger := logging.New(ioutil.Discard, 0)
+	index, err := db.NewIndex("retrieval", retrievalIndexFuncs, logger)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -1056,8 +1060,8 @@ func TestIncByteSlice(t *testing.T) {
 func TestIndex_HasMulti(t *testing.T) {
 	db, cleanupFunc := newTestDB(t)
 	defer cleanupFunc()
-
-	index, err := db.NewIndex("retrieval", retrievalIndexFuncs)
+	logger := logging.New(ioutil.Discard, 0)
+	index, err := db.NewIndex("retrieval", retrievalIndexFuncs, logger)
 	if err != nil {
 		t.Fatal(err)
 	}

pkg/shed/vector_uint64.go

@@ -19,6 +19,7 @@ package shed
 import (
 	"encoding/binary"
 
+	"github.com/ethersphere/bee/pkg/logging"
 	"github.com/syndtr/goleveldb/leveldb"
 )
 
@@ -27,11 +28,12 @@ import (
 type Uint64Vector struct {
 	db     *DB
 	key    []byte
+	logger logging.Logger
 }
 
 // NewUint64Vector returns a new Uint64Vector.
 // It validates its name and type against the database schema.
-func (db *DB) NewUint64Vector(name string) (f Uint64Vector, err error) {
+func (db *DB) NewUint64Vector(name string, logger logging.Logger) (f Uint64Vector, err error) {
 	key, err := db.schemaFieldKey(name, "vector-uint64")
 	if err != nil {
 		return f, err
@@ -39,6 +41,7 @@ func (db *DB) NewUint64Vector(name string) (f Uint64Vector, err error) {
 	return Uint64Vector{
 		db:     db,
 		key:    key,
+		logger: logger,
 	}, nil
 }
 
@@ -75,6 +78,7 @@ func (f Uint64Vector) Inc(i uint64) (val uint64, err error) {
 		if err == leveldb.ErrNotFound {
 			val = 0
 		} else {
+			f.logger.Debugf("error getiing value while doing Inc. Error: %s", err.Error())
 			return 0, err
 		}
 	}
@@ -91,6 +95,7 @@ func (f Uint64Vector) IncInBatch(batch *leveldb.Batch, i uint64) (val uint64, er
 		if err == leveldb.ErrNotFound {
 			val = 0
 		} else {
+			f.logger.Debugf("error getiing value while doing IncInBatch. Error: %s", err.Error())
 			return 0, err
 		}
 	}
@@ -108,6 +113,7 @@ func (f Uint64Vector) Dec(i uint64) (val uint64, err error) {
 		if err == leveldb.ErrNotFound {
 			val = 0
 		} else {
+			f.logger.Debugf("error getiing value while doing Dec. Error: %s", err.Error())
 			return 0, err
 		}
 	}
@@ -127,6 +133,7 @@ func (f Uint64Vector) DecInBatch(batch *leveldb.Batch, i uint64) (val uint64, er
 		if err == leveldb.ErrNotFound {
 			val = 0
 		} else {
+			f.logger.Debugf("error getiing value while doing DecInBatch. Error: %s", err.Error())
 			return 0, err
 		}
 	}

pkg/shed/vector_uint64_test.go

@@ -17,8 +17,10 @@
 package shed
 
 import (
+	"io/ioutil"
 	"testing"
 
+	"github.com/ethersphere/bee/pkg/logging"
 	"github.com/syndtr/goleveldb/leveldb"
 )
 
@@ -27,8 +29,8 @@ import (
 func TestUint64Vector(t *testing.T) {
 	db, cleanupFunc := newTestDB(t)
 	defer cleanupFunc()
-
-	bins, err := db.NewUint64Vector("bins")
+	logger := logging.New(ioutil.Discard, 0)
+	bins, err := db.NewUint64Vector("bins", logger)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -118,8 +120,8 @@ func TestUint64Vector(t *testing.T) {
 func TestUint64Vector_Inc(t *testing.T) {
 	db, cleanupFunc := newTestDB(t)
 	defer cleanupFunc()
-
-	bins, err := db.NewUint64Vector("bins")
+	logger := logging.New(ioutil.Discard, 0)
+	bins, err := db.NewUint64Vector("bins", logger)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -150,8 +152,8 @@ func TestUint64Vector_Inc(t *testing.T) {
 func TestUint64Vector_IncInBatch(t *testing.T) {
 	db, cleanupFunc := newTestDB(t)
 	defer cleanupFunc()
-
-	bins, err := db.NewUint64Vector("bins")
+	logger := logging.New(ioutil.Discard, 0)
+	bins, err := db.NewUint64Vector("bins", logger)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -206,8 +208,8 @@ func TestUint64Vector_IncInBatch(t *testing.T) {
 func TestUint64Vector_Dec(t *testing.T) {
 	db, cleanupFunc := newTestDB(t)
 	defer cleanupFunc()
-
-	bins, err := db.NewUint64Vector("bins")
+	logger := logging.New(ioutil.Discard, 0)
+	bins, err := db.NewUint64Vector("bins", logger)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -245,8 +247,8 @@ func TestUint64Vector_Dec(t *testing.T) {
 func TestUint64Vector_DecInBatch(t *testing.T) {
 	db, cleanupFunc := newTestDB(t)
 	defer cleanupFunc()
-
-	bins, err := db.NewUint64Vector("bins")
+	logger := logging.New(ioutil.Discard, 0)
+	bins, err := db.NewUint64Vector("bins", logger)
 	if err != nil {
 		t.Fatal(err)
 	}