diff --git a/vendor/github.com/syndtr/goleveldb/leveldb/db_transaction.go b/vendor/github.com/syndtr/goleveldb/leveldb/db_transaction.go
index ff9a7518e5..21d1e512f3 100644
--- a/vendor/github.com/syndtr/goleveldb/leveldb/db_transaction.go
+++ b/vendor/github.com/syndtr/goleveldb/leveldb/db_transaction.go
@@ -69,6 +69,9 @@ func (tr *Transaction) Has(key []byte, ro *opt.ReadOptions) (bool, error) {
 // DB. And a nil Range.Limit is treated as a key after all keys in
 // the DB.
 //
+// The returned iterator has locks on its own resources, so it can live beyond
+// the lifetime of the transaction who creates them.
+//
 // WARNING: Any slice returned by interator (e.g. slice returned by calling
 // Iterator.Key() or Iterator.Key() methods), its content should not be modified
 // unless noted otherwise.
@@ -252,13 +255,14 @@ func (tr *Transaction) discard() {
 	// Discard transaction.
 	for _, t := range tr.tables {
 		tr.db.logf("transaction@discard @%d", t.fd.Num)
-		if err1 := tr.db.s.stor.Remove(t.fd); err1 == nil {
-			tr.db.s.reuseFileNum(t.fd.Num)
-		}
+		// Iterator may still use the table, so we use tOps.remove here.
+		tr.db.s.tops.remove(t.fd)
 	}
 }
 
 // Discard discards the transaction.
+// This method is noop if transaction is already closed (either committed or
+// discarded)
 //
 // Other methods should not be called after transaction has been discarded.
 func (tr *Transaction) Discard() {
diff --git a/vendor/github.com/syndtr/goleveldb/leveldb/session_util.go b/vendor/github.com/syndtr/goleveldb/leveldb/session_util.go
index 67a6df9790..fc56b631f0 100644
--- a/vendor/github.com/syndtr/goleveldb/leveldb/session_util.go
+++ b/vendor/github.com/syndtr/goleveldb/leveldb/session_util.go
@@ -308,7 +308,7 @@ func (s *session) setNextFileNum(num int64) {
 func (s *session) markFileNum(num int64) {
 	nextFileNum := num + 1
 	for {
-		old, x := s.stNextFileNum, nextFileNum
+		old, x := atomic.LoadInt64(&s.stNextFileNum), nextFileNum
 		if old > x {
 			x = old
 		}
@@ -326,7 +326,7 @@ func (s *session) allocFileNum() int64 {
 // Reuse given file number.
 func (s *session) reuseFileNum(num int64) {
 	for {
-		old, x := s.stNextFileNum, num
+		old, x := atomic.LoadInt64(&s.stNextFileNum), num
 		if old != x+1 {
 			x = old
 		}
diff --git a/vendor/github.com/syndtr/goleveldb/leveldb/table.go b/vendor/github.com/syndtr/goleveldb/leveldb/table.go
index 5ad1f80543..b7759b2f5c 100644
--- a/vendor/github.com/syndtr/goleveldb/leveldb/table.go
+++ b/vendor/github.com/syndtr/goleveldb/leveldb/table.go
@@ -493,6 +493,8 @@ func (t *tOps) remove(fd storage.FileDesc) {
 		if t.evictRemoved && t.bcache != nil {
 			t.bcache.EvictNS(uint64(fd.Num))
 		}
+		// Try to reuse file num, useful for discarded transaction.
+		t.s.reuseFileNum(fd.Num)
 	})
 }
 
diff --git a/vendor/vendor.json b/vendor/vendor.json
index 7178864713..b852f822d2 100644
--- a/vendor/vendor.json
+++ b/vendor/vendor.json
@@ -449,76 +449,76 @@
 			"revisionTime": "2017-07-05T02:17:15Z"
 		},
 		{
-			"checksumSHA1": "bva7K+I3qF8NE32iIfBoXONPnL8=",
+			"checksumSHA1": "Bl4KYAyUkgJSjcdEyv3VhHQ8PVs=",
 			"path": "github.com/syndtr/goleveldb/leveldb",
-			"revision": "81b91e5521e1d9f5d09677b8a940a5903385b2fa",
-			"revisionTime": "2019-09-19T06:41:59Z"
+			"revision": "758128399b1df3a87e92df6c26c1d2063da8fabe",
+			"revisionTime": "2019-09-23T12:57:48Z"
 		},
 		{
 			"checksumSHA1": "mPNraL2edpk/2FYq26rSXfMHbJg=",
 			"path": "github.com/syndtr/goleveldb/leveldb/cache",
-			"revision": "81b91e5521e1d9f5d09677b8a940a5903385b2fa",
-			"revisionTime": "2019-09-19T06:41:59Z"
+			"revision": "758128399b1df3a87e92df6c26c1d2063da8fabe",
+			"revisionTime": "2019-09-23T12:57:48Z"
 		},
 		{
 			"checksumSHA1": "UA+PKDKWlDnE2OZblh23W6wZwbY=",
 			"path": "github.com/syndtr/goleveldb/leveldb/comparer",
-			"revision": "81b91e5521e1d9f5d09677b8a940a5903385b2fa",
-			"revisionTime": "2019-09-19T06:41:59Z"
+			"revision": "758128399b1df3a87e92df6c26c1d2063da8fabe",
+			"revisionTime": "2019-09-23T12:57:48Z"
 		},
 		{
 			"checksumSHA1": "1DRAxdlWzS4U0xKN/yQ/fdNN7f0=",
 			"path": "github.com/syndtr/goleveldb/leveldb/errors",
-			"revision": "81b91e5521e1d9f5d09677b8a940a5903385b2fa",
-			"revisionTime": "2019-09-19T06:41:59Z"
+			"revision": "758128399b1df3a87e92df6c26c1d2063da8fabe",
+			"revisionTime": "2019-09-23T12:57:48Z"
 		},
 		{
 			"checksumSHA1": "iBorxU3FBbau81WSyVa8KwcutzA=",
 			"path": "github.com/syndtr/goleveldb/leveldb/filter",
-			"revision": "81b91e5521e1d9f5d09677b8a940a5903385b2fa",
-			"revisionTime": "2019-09-19T06:41:59Z"
+			"revision": "758128399b1df3a87e92df6c26c1d2063da8fabe",
+			"revisionTime": "2019-09-23T12:57:48Z"
 		},
 		{
 			"checksumSHA1": "hPyFsMiqZ1OB7MX+6wIAA6nsdtc=",
 			"path": "github.com/syndtr/goleveldb/leveldb/iterator",
-			"revision": "81b91e5521e1d9f5d09677b8a940a5903385b2fa",
-			"revisionTime": "2019-09-19T06:41:59Z"
+			"revision": "758128399b1df3a87e92df6c26c1d2063da8fabe",
+			"revisionTime": "2019-09-23T12:57:48Z"
 		},
 		{
 			"checksumSHA1": "gJY7bRpELtO0PJpZXgPQ2BYFJ88=",
 			"path": "github.com/syndtr/goleveldb/leveldb/journal",
-			"revision": "81b91e5521e1d9f5d09677b8a940a5903385b2fa",
-			"revisionTime": "2019-09-19T06:41:59Z"
+			"revision": "758128399b1df3a87e92df6c26c1d2063da8fabe",
+			"revisionTime": "2019-09-23T12:57:48Z"
 		},
 		{
 			"checksumSHA1": "2ncG38FDk2thSlrHd7JFmiuvnxA=",
 			"path": "github.com/syndtr/goleveldb/leveldb/memdb",
-			"revision": "81b91e5521e1d9f5d09677b8a940a5903385b2fa",
-			"revisionTime": "2019-09-19T06:41:59Z"
+			"revision": "758128399b1df3a87e92df6c26c1d2063da8fabe",
+			"revisionTime": "2019-09-23T12:57:48Z"
 		},
 		{
 			"checksumSHA1": "LC+WnyNq4O2J9SHuVfWL19wZH48=",
 			"path": "github.com/syndtr/goleveldb/leveldb/opt",
-			"revision": "81b91e5521e1d9f5d09677b8a940a5903385b2fa",
-			"revisionTime": "2019-09-19T06:41:59Z"
+			"revision": "758128399b1df3a87e92df6c26c1d2063da8fabe",
+			"revisionTime": "2019-09-23T12:57:48Z"
 		},
 		{
 			"checksumSHA1": "ZnyuciM+R19NG8L5YS3TIJdo1e8=",
 			"path": "github.com/syndtr/goleveldb/leveldb/storage",
-			"revision": "81b91e5521e1d9f5d09677b8a940a5903385b2fa",
-			"revisionTime": "2019-09-19T06:41:59Z"
+			"revision": "758128399b1df3a87e92df6c26c1d2063da8fabe",
+			"revisionTime": "2019-09-23T12:57:48Z"
 		},
 		{
 			"checksumSHA1": "DS0i9KReIeZn3T1Bpu31xPMtzio=",
 			"path": "github.com/syndtr/goleveldb/leveldb/table",
-			"revision": "81b91e5521e1d9f5d09677b8a940a5903385b2fa",
-			"revisionTime": "2019-09-19T06:41:59Z"
+			"revision": "758128399b1df3a87e92df6c26c1d2063da8fabe",
+			"revisionTime": "2019-09-23T12:57:48Z"
 		},
 		{
 			"checksumSHA1": "V/Dh7NV0/fy/5jX1KaAjmGcNbzI=",
 			"path": "github.com/syndtr/goleveldb/leveldb/util",
-			"revision": "81b91e5521e1d9f5d09677b8a940a5903385b2fa",
-			"revisionTime": "2019-09-19T06:41:59Z"
+			"revision": "758128399b1df3a87e92df6c26c1d2063da8fabe",
+			"revisionTime": "2019-09-23T12:57:48Z"
 		},
 		{
 			"checksumSHA1": "SsMMqb3xn7hg1ZX5ugwZz5rzpx0=",