Fixes for go races and miner crashes

.github/workflows/race.yaml

@@ -11,7 +11,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        branch: [ master, latest ]
+        branch: [ stable, latest ]
     name: Race detection on ${{ matrix.branch }}
     steps:
       - name: Check out code into the Go module directory
@@ -28,12 +28,11 @@ jobs:
         shell: bash
         if: github.event_name == 'schedule'
         run: |
-          if [ "${{ matrix.branch }}" == "master" ]; then
+          if [ "${{ matrix.branch }}" == "stable" ]; then
             echo "run_on=master" >> $GITHUB_ENV
           fi
           if [ "${{ matrix.branch }}" == "latest" ]; then
-            branch=$(git branch -r | grep 'v\([0-9]\+\.\)\([0-9]\+\.\)\([0-9]\+\)-dev' | sort -Vr | head -1 | xargs)
-            echo "run_on=${branch}" >> $GITHUB_ENV
+            echo "run_on=dev" >> $GITHUB_ENV
           fi
 
       - name: Set manual branch name

cmd/karlsenminer/mineloop.go

@@ -57,7 +57,7 @@ func mineLoop(client *minerClient, numberOfBlocks uint64, targetBlocksPerSecond
 			defer blockTicker.Stop()
 		}
 		windowStart := time.Now()
-		for blockIndex := 1; ; blockIndex++ {
+		for blockIndex := uint64(0); numberOfBlocks == 0 || blockIndex < numberOfBlocks; blockIndex++ {
 			foundBlockChan <- mineNextBlock(mineWhenNotSynced)
 			if hasBlockRateTarget {
 				<-blockTicker.C

go.mod

@@ -8,28 +8,29 @@ require (
 	github.com/btcsuite/winsvc v1.0.0
 	github.com/davecgh/go-spew v1.1.1
 	github.com/gofrs/flock v0.8.1
-	github.com/golang/protobuf v1.5.2
-	github.com/jessevdk/go-flags v1.4.0
+	github.com/golang/protobuf v1.5.3
+	github.com/jessevdk/go-flags v1.5.0
 	github.com/jrick/logrotate v1.0.0
 	github.com/kaspanet/go-muhash v0.0.4
 	github.com/kaspanet/go-secp256k1 v0.0.7
 	github.com/pkg/errors v0.9.1
 	github.com/syndtr/goleveldb v1.0.1-0.20190923125748-758128399b1d
 	github.com/tyler-smith/go-bip39 v1.1.0
-	golang.org/x/crypto v0.1.0
-	golang.org/x/exp v0.0.0-20220414153411-bcd21879b8fd
-	golang.org/x/term v0.5.0
-	google.golang.org/grpc v1.38.0
-	google.golang.org/protobuf v1.28.1
+	golang.org/x/crypto v0.19.0
+	golang.org/x/exp v0.0.0-20240213143201-ec583247a57a
+	golang.org/x/term v0.17.0
+	google.golang.org/grpc v1.61.1
+	google.golang.org/protobuf v1.32.0
 	lukechampine.com/blake3 v1.2.1
 )
 
 require (
-	github.com/golang/snappy v0.0.1 // indirect
-	github.com/klauspost/cpuid/v2 v2.0.9 // indirect
-	golang.org/x/net v0.7.0 // indirect
-	golang.org/x/sys v0.5.0 // indirect
-	golang.org/x/text v0.7.0 // indirect
-	google.golang.org/genproto v0.0.0-20210604141403-392c879c8b08 // indirect
+	github.com/golang/snappy v0.0.4 // indirect
+	github.com/klauspost/cpuid/v2 v2.2.6 // indirect
+	golang.org/x/net v0.21.0 // indirect
+	golang.org/x/sys v0.17.0 // indirect
+	golang.org/x/text v0.14.0 // indirect
+	google.golang.org/genproto v0.0.0-20240213162025-012b6fc9bca9 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20240221002015-b0ce06bbee7c // indirect
 	gopkg.in/yaml.v2 v2.3.0 // indirect
 )

go.sum

@@ -42,21 +42,28 @@ github.com/golang/protobuf v1.4.2/go.mod h1:oDoupMAO8OvCJWAcko0GGGIgR6R6ocIYbsSw
 github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
 github.com/golang/protobuf v1.5.2 h1:ROPKBNFfQgOUMifHyP+KYbvpjbdoFNs+aK7DXlji0Tw=
 github.com/golang/protobuf v1.5.2/go.mod h1:XVQd3VNwM+JqD3oG2Ue2ip4fOMUkwXdXDdiuN0vRsmY=
+github.com/golang/protobuf v1.5.3 h1:KhyjKVUg7Usr/dYsdSqoFveMYd5ko72D+zANwlG1mmg=
+github.com/golang/protobuf v1.5.3/go.mod h1:XVQd3VNwM+JqD3oG2Ue2ip4fOMUkwXdXDdiuN0vRsmY=
 github.com/golang/snappy v0.0.1 h1:Qgr9rKW7uDUkrbSmQeiDsGa8SjGyCOGtuasMWwvp2P4=
 github.com/golang/snappy v0.0.1/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
+github.com/golang/snappy v0.0.4 h1:yAGX7huGHXlcLOEtBnF4w7FQwA26wojNCwOYAEhLjQM=
+github.com/golang/snappy v0.0.4/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
 github.com/google/go-cmp v0.2.0/go.mod h1:oXzfMopK8JAjlY9xF4vHSVASa0yLyX7SntLO5aqRK0M=
 github.com/google/go-cmp v0.3.0/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
 github.com/google/go-cmp v0.3.1/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
 github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.5.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.5.5 h1:Khx7svrCpmxxtHBq5j2mp/xVjsi8hQMfNLvJFAlrGgU=
 github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
+github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
 github.com/google/uuid v1.1.2/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/hpcloud/tail v1.0.0 h1:nfCOvKYfkgYP8hkirhJocXT2+zOD8yUNjXaWfTlyFKI=
 github.com/hpcloud/tail v1.0.0/go.mod h1:ab1qPbhIpdTxEkNHXyeSf5vhxWSCs/tWer42PpOxQnU=
 github.com/jessevdk/go-flags v0.0.0-20141203071132-1679536dcc89/go.mod h1:4FA24M0QyGHXBuZZK/XkWh8h0e1EYbRYJSGM75WSRxI=
 github.com/jessevdk/go-flags v1.4.0 h1:4IU2WS7AumrZ/40jfhf4QVDMsQwqA7VEHozFRrGARJA=
 github.com/jessevdk/go-flags v1.4.0/go.mod h1:4FA24M0QyGHXBuZZK/XkWh8h0e1EYbRYJSGM75WSRxI=
+github.com/jessevdk/go-flags v1.5.0 h1:1jKYvbxEjfUl0fmqTCOfonvskHHXMjBySTLW4y9LFvc=
+github.com/jessevdk/go-flags v1.5.0/go.mod h1:Fw0T6WPc1dYxT4mKEZRfG5kJhaTDP9pj1c2EWnYs/m4=
 github.com/jrick/logrotate v1.0.0 h1:lQ1bL/n9mBNeIXoTUoYRlK4dHuNJVofX9oWqBtPnSzI=
 github.com/jrick/logrotate v1.0.0/go.mod h1:LNinyqDIJnpAur+b8yyulnQw/wDuN1+BYKlTRt3OuAQ=
 github.com/kaspanet/go-muhash v0.0.4 h1:CQrm1RTJpQy+h4ZFjj9qq42K5fmA5QTGifzb47p4qWk=
@@ -66,6 +73,8 @@ github.com/kaspanet/go-secp256k1 v0.0.7/go.mod h1:cFbxhxKkxqHX5eIwUGKARkph19Pehi
 github.com/kkdai/bstream v0.0.0-20161212061736-f391b8402d23/go.mod h1:J+Gs4SYgM6CZQHDETBtE9HaSEkGmuNXF86RwHhHUvq4=
 github.com/klauspost/cpuid/v2 v2.0.9 h1:lgaqFMSdTdQYdZ04uHyN2d/eKdOMyi2YLSvlQIBFYa4=
 github.com/klauspost/cpuid/v2 v2.0.9/go.mod h1:FInQzS24/EEf25PyTYn52gqo7WaD8xa0213Md/qVLRg=
+github.com/klauspost/cpuid/v2 v2.2.6 h1:ndNyv040zDGIDh8thGkXYjnFtiN02M1PVVF+JE/48xc=
+github.com/klauspost/cpuid/v2 v2.2.6/go.mod h1:Lcz8mBdAVJIBVzewtcLocK12l3Y+JytZYpaMropDUws=
 github.com/onsi/ginkgo v1.6.0/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+WWjE=
 github.com/onsi/ginkgo v1.7.0 h1:WSHQ+IS43OoUrWtD1/bbclrwK8TTH5hzp+umCiuxHgs=
 github.com/onsi/ginkgo v1.7.0/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+WWjE=
@@ -90,9 +99,13 @@ golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPh
 golang.org/x/crypto v0.0.0-20210317152858-513c2a44f670/go.mod h1:T9bdIzuCu7OtxOm1hfPfRQxPLYneinmdGuTeoZ9dtd4=
 golang.org/x/crypto v0.1.0 h1:MDRAIl0xIo9Io2xV565hzXHw3zVseKrJKodhohM5CjU=
 golang.org/x/crypto v0.1.0/go.mod h1:RecgLatLF4+eUMCP1PoPZQb+cVrJcOPbHkTkbkB9sbw=
+golang.org/x/crypto v0.19.0 h1:ENy+Az/9Y1vSrlrvBSyna3PITt4tiZLf7sgCjZBX7Wo=
+golang.org/x/crypto v0.19.0/go.mod h1:Iy9bg/ha4yyC70EfRS8jz+B6ybOBKMaSxLj6P6oBDfU=
 golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
 golang.org/x/exp v0.0.0-20220414153411-bcd21879b8fd h1:zVFyTKZN/Q7mNRWSs1GOYnHM9NiFSJ54YVRsD0rNWT4=
 golang.org/x/exp v0.0.0-20220414153411-bcd21879b8fd/go.mod h1:lgLbSvA5ygNOMpwM/9anMpWVlVJ7Z+cHWq/eFuinpGE=
+golang.org/x/exp v0.0.0-20240213143201-ec583247a57a h1:HinSgX1tJRX3KsL//Gxynpw5CTOAIPhgL4W8PNiIpVE=
+golang.org/x/exp v0.0.0-20240213143201-ec583247a57a/go.mod h1:CxmFvTBINI24O/j8iY7H1xHzx2i4OsyguNBmN/uPtqc=
 golang.org/x/lint v0.0.0-20181026193005-c67002cb31c3/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE=
 golang.org/x/lint v0.0.0-20190227174305-5b3e6a55c961/go.mod h1:wehouNa3lNwaWXcvxsM5YxQ5yQlVC4a0KAMCusXpPoU=
 golang.org/x/lint v0.0.0-20190313153728-d0100b6bd8b3/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
@@ -110,6 +123,8 @@ golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v
 golang.org/x/net v0.0.0-20210405180319-a5a99cb37ef4/go.mod h1:p54w0d4576C0XHj96bSt6lcn1PtDYWL6XObtHCRCNQM=
 golang.org/x/net v0.7.0 h1:rJrUqqhjsgNp7KqAIc25s9pZnjU7TUcSY7HcVZjdn1g=
 golang.org/x/net v0.7.0/go.mod h1:2Tu9+aMcznHK/AK1HMvgo6xiTLG5rD5rZLDS+rp2Bjs=
+golang.org/x/net v0.21.0 h1:AQyQV4dYCvJ7vGmJyKki9+PBdyvhkSd8EIx/qb0AYv4=
+golang.org/x/net v0.21.0/go.mod h1:bIjVDfnllIU7BJ2DNgfnXvpSvtn8VRwhlsaeUTyUS44=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20181108010431-42b317875d0f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
@@ -125,14 +140,20 @@ golang.org/x/sys v0.0.0-20210330210617-4fbd30eecc44/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20210510120138-977fb7262007/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.5.0 h1:MUK/U/4lj1t1oPg0HfuXDN/Z1wv31ZJ/YcPiGccS4DU=
 golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.17.0 h1:25cE3gD+tdBA7lp7QfhuV+rJiE9YXTcS3VG1SqssI/Y=
+golang.org/x/sys v0.17.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/term v0.5.0 h1:n2a8QNdAb0sZNpU9R1ALUXBbY+w51fCQDN+7EdxNBsY=
 golang.org/x/term v0.5.0/go.mod h1:jMB1sMXY+tzblOD4FWmEbocvup2/aLOaQEp7JmGp78k=
+golang.org/x/term v0.17.0 h1:mkTF7LCd6WGJNL3K1Ad7kwxNfYAW6a8a8QqtMblp/4U=
+golang.org/x/term v0.17.0/go.mod h1:lLRBjIVuehSbZlaOtGMbcMncT+aqLLLmKrsjNrUguwk=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/text v0.3.5/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/text v0.7.0 h1:4BRB4x83lYWy72KwLD/qYDuTu7q9PjSagHvijDw7cLo=
 golang.org/x/text v0.7.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
+golang.org/x/text v0.14.0 h1:ScX5w1eTa3QqT8oi6+ziP7dTV1S2+ALU0bI+0zXKWiQ=
+golang.org/x/text v0.14.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20190114222345-bf090417da8b/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20190226205152-f727befe758c/go.mod h1:9Yl7xja0Znq3iFh3HoIrodX9oNMXvdceNzlUR8zjMvY=
@@ -153,12 +174,18 @@ google.golang.org/genproto v0.0.0-20190819201941-24fa4b261c55/go.mod h1:DMBHOl98
 google.golang.org/genproto v0.0.0-20200526211855-cb27e3aa2013/go.mod h1:NbSheEEYHJ7i3ixzK3sjbqSGDJWnxyFXZblF3eUsNvo=
 google.golang.org/genproto v0.0.0-20210604141403-392c879c8b08 h1:pc16UedxnxXXtGxHCSUhafAoVHQZ0yXl8ZelMH4EETc=
 google.golang.org/genproto v0.0.0-20210604141403-392c879c8b08/go.mod h1:UODoCrxHCcBojKKwX1terBiRUaqAsFqJiF615XL43r0=
+google.golang.org/genproto v0.0.0-20240213162025-012b6fc9bca9 h1:9+tzLLstTlPTRyJTh+ah5wIMsBW5c4tQwGTN3thOW9Y=
+google.golang.org/genproto v0.0.0-20240213162025-012b6fc9bca9/go.mod h1:mqHbVIp48Muh7Ywss/AD6I5kNVKZMmAa/QEW58Gxp2s=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20240221002015-b0ce06bbee7c h1:NUsgEN92SQQqzfA+YtqYNqYmB3DMMYLlIwUZAQFVFbo=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20240221002015-b0ce06bbee7c/go.mod h1:H4O17MA/PE9BsGx3w+a+W2VOLLD1Qf7oJneAoU6WktY=
 google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
 google.golang.org/grpc v1.23.0/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg=
 google.golang.org/grpc v1.25.1/go.mod h1:c3i+UQWmh7LiEpx4sFZnkU36qjEYZ0imhYfXVyQciAY=
 google.golang.org/grpc v1.27.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
 google.golang.org/grpc v1.38.0 h1:/9BgsAsa5nWe26HqOlvlgJnqBuktYOLCgjCPqsa56W0=
 google.golang.org/grpc v1.38.0/go.mod h1:NREThFqKR1f3iQ6oBuvc5LadQuXVGo9rkm5ZGrQdJfM=
+google.golang.org/grpc v1.61.1 h1:kLAiWrZs7YeDM6MumDe7m3y4aM6wacLzM1Y/wiLP9XY=
+google.golang.org/grpc v1.61.1/go.mod h1:VUbo7IFqmF1QtCAstipjG0GIoq49KvMe9+h1jFLBNJs=
 google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=
 google.golang.org/protobuf v0.0.0-20200221191635-4d8936d0db64/go.mod h1:kwYJMbMJ01Woi6D6+Kah6886xMZcty6N08ah7+eCXa0=
 google.golang.org/protobuf v0.0.0-20200228230310-ab0ca4ff8a60/go.mod h1:cfTl7dwQJ+fmap5saPgwCLgHXTUD7jkjRqWcaiX5VyM=
@@ -172,6 +199,8 @@ google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp0
 google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
 google.golang.org/protobuf v1.28.1 h1:d0NfwRgPtno5B1Wa6L2DAG+KivqkdutMf1UhdNx175w=
 google.golang.org/protobuf v1.28.1/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=
+google.golang.org/protobuf v1.32.0 h1:pPC6BG5ex8PDFnkbrGU3EixyhKcQ2aDuBS36lqK/C7I=
+google.golang.org/protobuf v1.32.0/go.mod h1:c6P6GXX6sHbq/GpV6MGZEdwhWPcYBgnhAHhKbcUYpos=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/fsnotify.v1 v1.4.7 h1:xOHLXZwVvI9hhs+cLKq5+I5onOuwQLhQwiu63xxlHs4=

infrastructure/network/rpcclient/grpcclient/grpcclient.go

@@ -3,6 +3,8 @@ package grpcclient
 import (
 	"context"
 	"io"
+	"sync"
+	"sync/atomic"
 	"time"
 
 	"github.com/karlsen-network/karlsend/app/appmessage"
@@ -26,6 +28,8 @@ type GRPCClient struct {
 	connection            *grpc.ClientConn
 	onErrorHandler        OnErrorHandler
 	onDisconnectedHandler OnDisconnectedHandler
+	isError               uint32
+	streamLock            sync.RWMutex
 }
 
 // Connect connects to the RPC server with the given address
@@ -55,6 +59,12 @@ func (c *GRPCClient) Close() error {
 
 // Disconnect disconnects from the RPC server
 func (c *GRPCClient) Disconnect() error {
+
+	// Workaround for the current gRPC bi-directional router loop and error handler
+	if atomic.LoadUint32(&c.isError) == 1 {
+		c.streamLock.Lock()
+		defer c.streamLock.Unlock()
+	}
 	return c.stream.CloseSend()
 }
 
@@ -101,22 +111,46 @@ func (c *GRPCClient) AttachRouter(router *router.Router) {
 	})
 }
 
+func (c *GRPCClient) mutexSend(request *protowire.KarlsendMessage) error {
+	c.streamLock.RLock()
+	defer c.streamLock.RUnlock()
+
+	return c.stream.Send(request)
+}
+
 func (c *GRPCClient) send(requestAppMessage appmessage.Message) error {
 	request, err := protowire.FromAppMessage(requestAppMessage)
 	if err != nil {
 		return errors.Wrapf(err, "error converting the request")
 	}
-	return c.stream.Send(request)
+	return c.mutexSend(request)
+}
+
+func (c *GRPCClient) mutexReceive() (*protowire.KarlsendMessage, error) {
+	c.streamLock.RLock()
+	defer c.streamLock.RUnlock()
+
+	return c.stream.Recv()
 }
 
 func (c *GRPCClient) receive() (appmessage.Message, error) {
-	response, err := c.stream.Recv()
+	response, err := c.mutexReceive()
 	if err != nil {
 		return nil, err
 	}
 	return response.ToAppMessage()
 }
 
+func (c *GRPCClient) mutexHandleError(err error) {
+
+	// lock error handler
+	c.streamLock.RLock()
+	defer c.streamLock.RUnlock()
+
+	atomic.StoreUint32(&c.isError, 1)
+	c.onErrorHandler(err)
+}
+
 func (c *GRPCClient) handleError(err error) {
 	if errors.Is(err, io.EOF) {
 		if c.onDisconnectedHandler != nil {
@@ -132,7 +166,7 @@ func (c *GRPCClient) handleError(err error) {
 		return
 	}
 	if c.onErrorHandler != nil {
-		c.onErrorHandler(err)
+		c.mutexHandleError(err)
 		return
 	}
 	panic(err)