fix error passing

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,24 @@
+---
+name: Bug report
+about: For reporting bugs in go-micro
+title: "[BUG]"
+labels: ''
+assignees: ''
+
+---
+
+**Describe the bug**
+
+1. What are you trying to do?
+2. What did you expect to happen?
+3. What happens instead?
+
+**How to reproduce the bug:**
+
+If possible, please include a minimal code snippet here.
+
+**Environment:**
+Go Version: please paste `go version` output here
+```
+please paste `go env` output here
+```

.github/ISSUE_TEMPLATE/feature-request---enhancement.md

@@ -0,0 +1,17 @@
+---
+name: Feature request / Enhancement
+about: If you have a need not served by go-micro
+title: "[FEATURE]"
+labels: ''
+assignees: ''
+
+---
+
+**Is your feature request related to a problem? Please describe.**
+A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+
+**Describe the solution you'd like**
+A clear and concise description of what you want to happen.
+
+**Additional context**
+Add any other context or screenshots about the feature request here.

.github/ISSUE_TEMPLATE/question.md

@@ -0,0 +1,14 @@
+---
+name: Question
+about: Ask a question about go-micro
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+Before asking, please check if your question has already been answered: 
+
+1. Check the documentation - https://micro.mu/docs/
+2. Check the examples and plugins - https://github.com/micro/examples & https://github.com/micro/go-plugins
+3. Search existing issues

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,9 @@
+## Pull Request template
+Please, go through these steps before clicking submit on this PR.
+
+1. Give a descriptive title to your PR.
+2. Provide a description of your changes.
+3. Make sure you have some relevant tests.
+4. Put `closes #XXXX` in your comment to auto-close the issue that your PR fixes (if applicable).
+
+**PLEASE REMOVE THIS TEMPLATE BEFORE SUBMITTING**

.github/dependabot.yml

@@ -0,0 +1,19 @@
+# To get started with Dependabot version updates, you'll need to specify which
+# package ecosystems to update and where the package manifests are located.
+# Please see the documentation for all configuration options:
+# https://help.github.com/github/administering-a-repository/configuration-options-for-dependency-updates
+
+version: 2
+updates:
+
+  # Maintain dependencies for GitHub Actions
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "daily"
+
+  # Maintain dependencies for Golang
+  - package-ecosystem: "gomod"
+    directory: "/"
+    schedule:
+      interval: "daily"

.github/workflows/build.yml

@@ -0,0 +1,46 @@
+name: build
+on:
+ push:
+    branches:
+    - master
+jobs:
+  test:
+    name: test
+    runs-on: ubuntu-latest
+    steps:
+    - name: setup
+      uses: actions/setup-go@v2
+      with:
+        go-version: 1.16
+    - name: checkout
+      uses: actions/checkout@v2
+    - name: cache
+      uses: actions/cache@v2
+      with:
+        path: ~/go/pkg/mod
+        key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
+        restore-keys: ${{ runner.os }}-go-
+    - name: deps
+      run: go get -v -t -d ./...
+    - name: test
+      env:
+        INTEGRATION_TESTS: yes
+      run: go test -mod readonly -v ./...
+  lint:
+    name: lint
+    runs-on: ubuntu-latest
+    steps:
+      - name: checkout
+        uses: actions/checkout@v2
+      - name: lint
+        uses: golangci/golangci-lint-action@v2
+        continue-on-error: true
+        with:
+          # Required: the version of golangci-lint is required and must be specified without patch version: we always use the latest patch version.
+          version: v1.30
+          # Optional: working directory, useful for monorepos
+          # working-directory: somedir
+          # Optional: golangci-lint command line arguments.
+          # args: --issues-exit-code=0
+          # Optional: show only new issues if it's a pull request. The default value is `false`.
+          # only-new-issues: true

.github/workflows/codeql-analysis.yml

@@ -0,0 +1,71 @@
+# For most projects, this workflow file will not need changing; you simply need
+# to commit it to your repository.
+#
+# You may wish to alter this file to override the set of languages analyzed,
+# or to provide custom queries or build logic.
+#
+# ******** NOTE ********
+# We have attempted to detect the languages in your repository. Please check
+# the `language` matrix defined below to confirm you have the correct set of
+# supported CodeQL languages.
+#
+name: "CodeQL"
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    # The branches below must be a subset of the branches above
+    branches: [ master ]
+  schedule:
+    - cron: '34 1 * * 0'
+
+jobs:
+  analyze:
+    name: Analyze
+    runs-on: ubuntu-latest
+    permissions:
+      actions: read
+      contents: read
+      security-events: write
+
+    strategy:
+      fail-fast: false
+      matrix:
+        language: [ 'go' ]
+        # CodeQL supports [ 'cpp', 'csharp', 'go', 'java', 'javascript', 'python' ]
+        # Learn more:
+        # https://docs.github.com/en/free-pro-team@latest/github/finding-security-vulnerabilities-and-errors-in-your-code/configuring-code-scanning#changing-the-languages-that-are-analyzed
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v2
+
+    # Initializes the CodeQL tools for scanning.
+    - name: Initialize CodeQL
+      uses: github/codeql-action/init@v1
+      with:
+        languages: ${{ matrix.language }}
+        # If you wish to specify custom queries, you can do so here or in a config file.
+        # By default, queries listed here will override any specified in a config file.
+        # Prefix the list here with "+" to use these queries and those in the config file.
+        # queries: ./path/to/local/query, your-org/your-repo/queries@main
+
+    # Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
+    # If this step fails, then you should remove it and run the build manually (see below)
+    - name: Autobuild
+      uses: github/codeql-action/autobuild@v1
+
+    # ℹ️ Command-line programs to run using the OS shell.
+    # 📚 https://git.io/JvXDl
+
+    # ✏️ If the Autobuild fails above, remove it and uncomment the following three lines
+    #    and modify them (or add more) to build your code if your project
+    #    uses a compiled language
+
+    #- run: |
+    #   make bootstrap
+    #   make release
+
+    - name: Perform CodeQL Analysis
+      uses: github/codeql-action/analyze@v1

.github/workflows/pr.yml

@@ -0,0 +1,46 @@
+name: prbuild
+on:
+  pull_request:
+    branches:
+    - master
+jobs:
+  test:
+    name: test
+    runs-on: ubuntu-latest
+    steps:
+    - name: setup
+      uses: actions/setup-go@v2
+      with:
+        go-version: 1.16
+    - name: checkout
+      uses: actions/checkout@v2
+    - name: cache
+      uses: actions/cache@v2
+      with:
+        path: ~/go/pkg/mod
+        key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
+        restore-keys: ${{ runner.os }}-go-
+    - name: deps
+      run: go get -v -t -d ./...
+    - name: test
+      env:
+        INTEGRATION_TESTS: yes
+      run: go test -mod readonly -v ./...
+  lint:
+    name: lint
+    runs-on: ubuntu-latest
+    steps:
+      - name: checkout
+        uses: actions/checkout@v2
+      - name: lint
+        uses: golangci/golangci-lint-action@v2
+        continue-on-error: true
+        with:
+          # Required: the version of golangci-lint is required and must be specified without patch version: we always use the latest patch version.
+          version: v1.30
+          # Optional: working directory, useful for monorepos
+          # working-directory: somedir
+          # Optional: golangci-lint command line arguments.
+          # args: --issues-exit-code=0
+          # Optional: show only new issues if it's a pull request. The default value is `false`.
+          # only-new-issues: true

go.mod

@@ -3,11 +3,11 @@ module github.com/unistack-org/micro-broker-kgo/v3
 go 1.16
 
 require (
-	github.com/twmb/franz-go v0.10.3-0.20210825060253-d5e80b38ca2b
+	github.com/klauspost/compress v1.13.6 // indirect
-	github.com/twmb/franz-go/pkg/kmsg v0.0.0-20210826221812-c6df11da978a
+	github.com/twmb/franz-go v1.0.0
+	github.com/twmb/franz-go/pkg/kmsg v0.0.0-20210914174821-2f676c0a574b // indirect
 	github.com/unistack-org/micro-codec-json/v3 v3.2.5
-	github.com/unistack-org/micro-proto v0.0.8 // indirect
+	github.com/unistack-org/micro/v3 v3.7.1
-	github.com/unistack-org/micro/v3 v3.6.3
+	google.golang.org/genproto v0.0.0-20200526211855-cb27e3aa2013 // indirect
-	golang.org/x/sync v0.0.0-20210220032951-036812b2e83c
 	google.golang.org/protobuf v1.27.1 // indirect
 )

go.sum

@@ -21,9 +21,6 @@ github.com/golang/protobuf v1.4.0/go.mod h1:jodUvKwWbYaEsadDk5Fwe5c77LiNKVO9IDvq
 github.com/golang/protobuf v1.4.1/go.mod h1:U8fpvMrcmy5pZrNK1lt4xCsGvpyWQ/VVv6QDs8UjoX8=
 github.com/golang/protobuf v1.4.3/go.mod h1:oDoupMAO8OvCJWAcko0GGGIgR6R6ocIYbsSw735rRwI=
 github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
-github.com/golang/snappy v0.0.3/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=
@@ -42,8 +39,10 @@ github.com/jcmturner/gofork v1.0.0/go.mod h1:MK8+TM0La+2rjBD4jE12Kj1pCCxK7d2LK/U
 github.com/jcmturner/goidentity/v6 v6.0.1/go.mod h1:X1YW3bgtvwAXju7V3LCIMpY0Gbxyjn/mY9zx4tFonSg=
 github.com/jcmturner/gokrb5/v8 v8.4.2/go.mod h1:sb+Xq/fTY5yktf/VxLsE3wlfPqQjp0aWNYyvBVK62bc=
 github.com/jcmturner/rpc/v2 v2.0.3/go.mod h1:VUJYCIDm3PVOEHw8sgt091/20OJjskO/YJki3ELg/Hc=
-github.com/klauspost/compress v1.13.4 h1:0zhec2I8zGnjWcKyLl6i3gPqKANCCn5e9xmviEEeX6s=
+github.com/klauspost/compress v1.13.5 h1:9O69jUPDcsT9fEm74W92rZL9FQY7rCdaXVneq+yyzl4=
-github.com/klauspost/compress v1.13.4/go.mod h1:8dP1Hq4DHOhN9w426knH3Rhby4rFm6D8eO+e+Dq5Gzg=
+github.com/klauspost/compress v1.13.5/go.mod h1:/3/Vjq9QcHkK5uEr5lBEmyoZ1iFhe47etQ6QUkpK6sk=
+github.com/klauspost/compress v1.13.6 h1:P76CopJELS0TiO2mebmnzgWaajssP/EszplttgQxcgc=
+github.com/klauspost/compress v1.13.6/go.mod h1:/3/Vjq9QcHkK5uEr5lBEmyoZ1iFhe47etQ6QUkpK6sk=
 github.com/patrickmn/go-cache v2.1.0+incompatible/go.mod h1:3Qf8kWWT7OJRJbdiICTKqZju1ZixQ/KpMGzzAfe6+WQ=
 github.com/pierrec/lz4/v4 v4.1.8 h1:ieHkV+i2BRzngO4Wd/3HGowuZStgq6QkPsD1eolNAO4=
 github.com/pierrec/lz4/v4 v4.1.8/go.mod h1:gZWDp/Ze/IJXGXf23ltt2EXimqmTUXEy0GFuRQyBid4=
@@ -56,21 +55,25 @@ github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81P
 github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5CcY=
 github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
-github.com/twmb/franz-go v0.10.3-0.20210825060253-d5e80b38ca2b h1:t7+Qdd/GHtUBN6D71CwwOEfsZmK0QQ/up3M6gaoaHQ4=
+github.com/twmb/franz-go v1.0.0 h1:JcsqEImDhr7H/eQx/V58fwzjmVi2FRwz6dyylmdJ0NU=
-github.com/twmb/franz-go v0.10.3-0.20210825060253-d5e80b38ca2b/go.mod h1:Txc5/v0DIKGcdCa1VZhyasECMJ4svN/LHUKYUPYihL0=
+github.com/twmb/franz-go v1.0.0/go.mod h1:cdFLk8d/5/ox88y38xgiDKP3Yo338OO0t5QbTEM2K6I=
-github.com/twmb/franz-go/pkg/kmsg v0.0.0-20210823212011-0d01f7456b4d/go.mod h1:SxG/xJKhgPu25SamAq0rrucfp7lbzCpEXOC+vH/ELrY=
+github.com/twmb/franz-go/pkg/kmsg v0.0.0-20210901051457-3c197a133ddd h1:o+cb+mqRFpVKrusJy/Ebt4zTWn94nPbI1ooMeNhovqM=
-github.com/twmb/franz-go/pkg/kmsg v0.0.0-20210826221812-c6df11da978a h1:UBO58MRI/GH5eD5+fKXZoJMGyEcsUs9LQnHJbNL0yKs=
+github.com/twmb/franz-go/pkg/kmsg v0.0.0-20210901051457-3c197a133ddd/go.mod h1:SxG/xJKhgPu25SamAq0rrucfp7lbzCpEXOC+vH/ELrY=
-github.com/twmb/franz-go/pkg/kmsg v0.0.0-20210826221812-c6df11da978a/go.mod h1:SxG/xJKhgPu25SamAq0rrucfp7lbzCpEXOC+vH/ELrY=
+github.com/twmb/franz-go/pkg/kmsg v0.0.0-20210914174821-2f676c0a574b h1:7d6eRt9HEqXVxMzD2fry9qtJ0kRkgeJ5olqW9K+aXv8=
+github.com/twmb/franz-go/pkg/kmsg v0.0.0-20210914174821-2f676c0a574b/go.mod h1:SxG/xJKhgPu25SamAq0rrucfp7lbzCpEXOC+vH/ELrY=
 github.com/twmb/go-rbtree v1.0.0 h1:KxN7dXJ8XaZ4cvmHV1qqXTshxX3EBvX/toG5+UR49Mg=
 github.com/twmb/go-rbtree v1.0.0/go.mod h1:UlIAI8gu3KRPkXSobZnmJfVwCJgEhD/liWzT5ppzIyc=
 github.com/unistack-org/micro-codec-json/v3 v3.2.5 h1:WOilhbL0YSu58iIQIIxpawRYZyx6CR16tCpbX4ai3Vc=
 github.com/unistack-org/micro-codec-json/v3 v3.2.5/go.mod h1:LSzfrD9GYWCl6KOyihywx1wlbOgStrpyy3NVHNZAvHA=
-github.com/unistack-org/micro-proto v0.0.5/go.mod h1:EuI7UlfGXmT1hy6WacULib9LbNgRnDYQvTCFoLgKM2I=
 github.com/unistack-org/micro-proto v0.0.8 h1:g4UZGQGeYGI3CFJtjuEm47aouYPviG8SDhSifl0831w=
 github.com/unistack-org/micro-proto v0.0.8/go.mod h1:GYO53DWmeldRIo90cAdQx8bLr/WJMxW62W4ja74p1Ac=
+github.com/unistack-org/micro-proto v0.0.9 h1:KrWLS4FUX7UAWNAilQf70uad6ZPf/0EudeddCXllRVc=
+github.com/unistack-org/micro-proto v0.0.9/go.mod h1:Cckwmzd89gvS7ThxzZp9kQR/EOdksFQcsTAtDDyKwrg=
 github.com/unistack-org/micro/v3 v3.3.19/go.mod h1:LXmPfbJnJNvL0kQs8HfnkV3Wya2Wb+C7keVq++RCZnk=
-github.com/unistack-org/micro/v3 v3.6.3 h1:CvC4B2kOgwzhPx+w9fcbEIJkgzxS7i84PRB+vL6Vz0U=
+github.com/unistack-org/micro/v3 v3.7.0 h1:jEEegoVh1VIgT/+4gHw3TmwI3p7ufAdV37RVNxx9kNc=
-github.com/unistack-org/micro/v3 v3.6.3/go.mod h1:Hp+DmX1Bt+/z+ihk5coYwNtXhPMwr4SJuCFRy2kyUl8=
+github.com/unistack-org/micro/v3 v3.7.0/go.mod h1:xXGbjNQShqlth0hv+q7ijGvciXGVqxUnVdkFm0t95rk=
+github.com/unistack-org/micro/v3 v3.7.1 h1:gjCon1U8i9upNgw9+iEgbZh2LCeBizDYotQ+THHV0lo=
+github.com/unistack-org/micro/v3 v3.7.1/go.mod h1:gBoY6gvzeFiJTZ4FgDttGNSs4Y1+1PRg2cV1yTRMSlg=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/crypto v0.0.0-20201112155050-0c6587e931a9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
 golang.org/x/crypto v0.0.0-20210817164053-32db794688a5/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
@@ -86,13 +89,11 @@ golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn
 golang.org/x/net v0.0.0-20200114155413-6afb5195e5aa/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
 golang.org/x/net v0.0.0-20210510120150-4163338589ed/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
-golang.org/x/net v0.0.0-20210813160813-60bc85c4be6d/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
+golang.org/x/net v0.0.0-20210825183410-e898025ed96a/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
 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=
 golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.0.0-20210220032951-036812b2e83c h1:5KslGYwFpkhGh+Q16bwMP3cOontH8FOep7tGV86Y7SQ=
-golang.org/x/sync v0.0.0-20210220032951-036812b2e83c/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=

kgo.go

@@ -4,29 +4,18 @@ package kgo
 import (
 	"context"
 	"fmt"
-	"math/rand"
 	"strings"
 	"sync"
-	"sync/atomic"
 	"time"
 
-	kerr "github.com/twmb/franz-go/pkg/kerr"
 	kgo "github.com/twmb/franz-go/pkg/kgo"
-	kmsg "github.com/twmb/franz-go/pkg/kmsg"
 	"github.com/unistack-org/micro/v3/broker"
 	"github.com/unistack-org/micro/v3/logger"
 	"github.com/unistack-org/micro/v3/metadata"
 	"github.com/unistack-org/micro/v3/util/id"
 	mrand "github.com/unistack-org/micro/v3/util/rand"
-	"golang.org/x/sync/errgroup"
 )
 
-var pPool = sync.Pool{
-	New: func() interface{} {
-		return &publication{msg: &broker.Message{}}
-	},
-}
-
 type kBroker struct {
 	writer    *kgo.Client // used only to push messages
 	kopts     []kgo.Opt
@@ -46,6 +35,7 @@ type subscriber struct {
 	batchhandler broker.BatchHandler
 	closed       bool
 	done         chan struct{}
+	consumers    map[string]map[int32]worker
 	sync.RWMutex
 }
 
@@ -57,10 +47,6 @@ type publication struct {
 	ack bool
 }
 
-func init() {
-	rand.Seed(time.Now().UnixNano())
-}
-
 func (p *publication) Topic() string {
 	return p.topic
 }
@@ -128,7 +114,8 @@ func (k *kBroker) Connect(ctx context.Context) error {
 	kaddrs := k.opts.Addrs
 
 	// shuffle addrs
-	rand.Shuffle(len(kaddrs), func(i, j int) {
+	var rng mrand.Rand
+	rng.Shuffle(len(kaddrs), func(i, j int) {
 		kaddrs[i], kaddrs[j] = kaddrs[j], kaddrs[i]
 	})
 
@@ -327,22 +314,42 @@ func (k *kBroker) Subscribe(ctx context.Context, topic string, handler broker.Ha
 	kaddrs := k.opts.Addrs
 
 	// shuffle addrs
-	rand.Shuffle(len(kaddrs), func(i, j int) {
+	var rng mrand.Rand
+	rng.Shuffle(len(kaddrs), func(i, j int) {
 		kaddrs[i], kaddrs[j] = kaddrs[j], kaddrs[i]
 	})
 
+	td := DefaultCommitInterval
+	if k.opts.Context != nil {
+		if v, ok := k.opts.Context.Value(commitIntervalKey{}).(time.Duration); ok && v > 0 {
+			td = v
+		}
+	}
+
+	sub := &subscriber{
+		topic:     topic,
+		done:      make(chan struct{}),
+		opts:      options,
+		handler:   handler,
+		kopts:     k.opts,
+		consumers: make(map[string]map[int32]worker),
+	}
+
 	kopts := append(k.kopts,
 		kgo.SeedBrokers(kaddrs...),
 		kgo.ConsumerGroup(options.Group),
 		kgo.ConsumeTopics(topic),
 		kgo.ConsumeResetOffset(kgo.NewOffset().AtStart()),
-		kgo.DisableAutoCommit(),
 		kgo.FetchMaxWait(1*time.Second),
 		// kgo.KeepControlRecords(),
 		kgo.Balancers(kgo.CooperativeStickyBalancer(), kgo.StickyBalancer()),
 		kgo.FetchIsolationLevel(kgo.ReadUncommitted()),
 		kgo.WithHooks(&metrics{meter: k.opts.Meter}),
-	// TODO: must set https://pkg.go.dev/github.com/twmb/franz-go/pkg/kgo#OnRevoked
+		kgo.AutoCommitMarks(),
+		kgo.AutoCommitInterval(td),
+		kgo.OnPartitionsAssigned(sub.assigned),
+		kgo.OnPartitionsRevoked(sub.revoked),
+		kgo.OnPartitionsLost(sub.revoked),
 	)
 
 	reader, err := kgo.NewClient(kopts...)
@@ -350,7 +357,7 @@ func (k *kBroker) Subscribe(ctx context.Context, topic string, handler broker.Ha
 		return nil, err
 	}
 
-	sub := &subscriber{topic: topic, done: make(chan struct{}), opts: options, reader: reader, handler: handler, kopts: k.opts}
+	sub.reader = reader
 	go sub.run(ctx)
 
 	k.Lock()
@@ -359,195 +366,6 @@ func (k *kBroker) Subscribe(ctx context.Context, topic string, handler broker.Ha
 	return sub, nil
 }
 
-func (s *subscriber) run(ctx context.Context) {
-	for {
-		select {
-		case <-ctx.Done():
-			return
-		case <-s.kopts.Context.Done():
-			return
-		default:
-			fetches := s.reader.PollFetches(ctx)
-			if fetches.IsClientClosed() {
-				// TODO: fatal ?
-				return
-			}
-			if len(fetches.Errors()) > 0 {
-				for _, err := range fetches.Errors() {
-					s.kopts.Logger.Errorf(ctx, "fetch err topic %s partition %d: %v", err.Topic, err.Partition, err.Err)
-				}
-				// TODO: fatal ?
-				return
-			}
-
-			if err := s.handleFetches(ctx, fetches); err != nil {
-				s.kopts.Logger.Errorf(ctx, "fetch handler err: %v", err)
-				// TODO: fatal ?
-				// return
-			}
-		}
-	}
-}
-
-func (s *subscriber) handleFetches(ctx context.Context, fetches kgo.Fetches) error {
-	var err error
-
-	eh := s.kopts.ErrorHandler
-	if s.opts.ErrorHandler != nil {
-		eh = s.opts.ErrorHandler
-	}
-
-	var mu sync.Mutex
-
-	done := int32(0)
-	doneCh := make(chan struct{})
-	g, gctx := errgroup.WithContext(ctx)
-
-	td := DefaultCommitInterval
-	if s.kopts.Context != nil {
-		if v, ok := s.kopts.Context.Value(commitIntervalKey{}).(time.Duration); ok && v > 0 {
-			td = v
-		}
-	}
-
-	// ticker for commit offsets
-	ticker := time.NewTicker(td)
-	defer ticker.Stop()
-
-	offsets := make(map[string]map[int32]kgo.EpochOffset)
-	offsets[s.topic] = make(map[int32]kgo.EpochOffset)
-
-	fillOffsets := func(off map[string]map[int32]kgo.EpochOffset, rec *kgo.Record) {
-		mu.Lock()
-		if at, ok := off[s.topic][rec.Partition]; ok {
-			if at.Epoch > rec.LeaderEpoch || at.Epoch == rec.LeaderEpoch && at.Offset > rec.Offset {
-				mu.Unlock()
-				return
-			}
-		}
-		off[s.topic][rec.Partition] = kgo.EpochOffset{Epoch: rec.LeaderEpoch, Offset: rec.Offset + 1}
-		mu.Unlock()
-	}
-
-	commitOffsets := func(cl *kgo.Client, ctx context.Context, off map[string]map[int32]kgo.EpochOffset) error {
-		var rerr error
-
-		mu.Lock()
-		offsets := off
-		mu.Unlock()
-
-		cl.CommitOffsetsSync(ctx, offsets, func(_ *kgo.Client, _ *kmsg.OffsetCommitRequest, resp *kmsg.OffsetCommitResponse, err error) {
-			if err != nil {
-				rerr = err
-				return
-			}
-
-			for _, topic := range resp.Topics {
-				for _, partition := range topic.Partitions {
-					if err := kerr.ErrorForCode(partition.ErrorCode); err != nil {
-						rerr = err
-						return
-					}
-				}
-			}
-		})
-
-		return rerr
-	}
-
-	go func() {
-		for {
-			select {
-			case <-gctx.Done():
-				return
-			case <-s.done:
-				atomic.StoreInt32(&done, 1)
-				if err := commitOffsets(s.reader, ctx, offsets); err != nil && s.kopts.Logger.V(logger.ErrorLevel) {
-					s.kopts.Logger.Errorf(s.kopts.Context, "[kgo]: failed to commit offsets: %v", err)
-				}
-				return
-			case <-doneCh:
-				return
-			case <-ticker.C:
-				if err := commitOffsets(s.reader, ctx, offsets); err != nil {
-					if s.kopts.Logger.V(logger.ErrorLevel) {
-						s.kopts.Logger.Errorf(s.kopts.Context, "[kgo]: failed to commit offsets: %v", err)
-					}
-					return
-				}
-			}
-		}
-	}()
-
-	for _, fetch := range fetches {
-		for _, ftopic := range fetch.Topics {
-			for _, partition := range ftopic.Partitions {
-				precords := partition.Records
-				g.Go(func() error {
-					for _, record := range precords {
-						if atomic.LoadInt32(&done) == 1 {
-							return nil
-						}
-						p := pPool.Get().(*publication)
-						p.msg.Header = nil
-						p.msg.Body = nil
-						p.topic = s.topic
-						p.err = nil
-						p.ack = false
-						if s.opts.BodyOnly {
-							p.msg.Body = record.Value
-						} else {
-							if err := s.kopts.Codec.Unmarshal(record.Value, p.msg); err != nil {
-								p.err = err
-								p.msg.Body = record.Value
-								if eh != nil {
-									_ = eh(p)
-									if p.ack {
-										fillOffsets(offsets, record)
-									}
-									pPool.Put(p)
-									continue
-								} else {
-									if s.kopts.Logger.V(logger.ErrorLevel) {
-										s.kopts.Logger.Errorf(s.kopts.Context, "[kgo]: failed to unmarshal: %v", err)
-									}
-								}
-								pPool.Put(p)
-								return err
-							}
-						}
-						err = s.handler(p)
-						if err == nil && s.opts.AutoAck {
-							p.ack = true
-						} else if err != nil {
-							p.err = err
-							if eh != nil {
-								_ = eh(p)
-							} else {
-								if s.kopts.Logger.V(logger.ErrorLevel) {
-									s.kopts.Logger.Errorf(s.kopts.Context, "[kgo]: subscriber error: %v", err)
-								}
-							}
-						}
-						if p.ack {
-							fillOffsets(offsets, record)
-						}
-						pPool.Put(p)
-					}
-					return nil
-				})
-			}
-			if err := g.Wait(); err != nil {
-				return err
-			}
-		}
-	}
-
-	close(doneCh)
-
-	return commitOffsets(s.reader, ctx, offsets)
-}
-
 func (k *kBroker) String() string {
 	return "kgo"
 }
@@ -555,7 +373,8 @@ func (k *kBroker) String() string {
 func NewBroker(opts ...broker.Option) broker.Broker {
 	options := broker.NewOptions(opts...)
 	kopts := []kgo.Opt{
-		kgo.BatchCompression(kgo.NoCompression()),
+		kgo.DisableIdempotentWrite(),
+		kgo.ProducerBatchCompression(kgo.NoCompression()),
 		kgo.WithLogger(&mlogger{l: options.Logger, ctx: options.Context}),
 		kgo.RetryBackoffFn(
 			func() func(int) time.Duration {

kgo_test.go

@@ -10,11 +10,19 @@ import (
 	"time"
 
 	kg "github.com/twmb/franz-go/pkg/kgo"
-	kgo "github.com/unistack-org/micro-broker-kgo/v3"
 	jsoncodec "github.com/unistack-org/micro-codec-json/v3"
 	"github.com/unistack-org/micro/v3/broker"
 	"github.com/unistack-org/micro/v3/logger"
 	"github.com/unistack-org/micro/v3/metadata"
+
+	kgo "github.com/unistack-org/micro-broker-kgo/v3"
+)
+
+var (
+	msgcnt   = int64(12000000)
+	group    = "38"
+	prefill  = false
+	loglevel = logger.InfoLevel
 )
 
 var bm = &broker.Message{
@@ -27,7 +35,9 @@ func TestPubSub(t *testing.T) {
 		t.Skip()
 	}
 
-	logger.DefaultLogger.Init(logger.WithLevel(logger.TraceLevel), logger.WithCallerSkipCount(3))
+	if err := logger.DefaultLogger.Init(logger.WithLevel(loglevel), logger.WithCallerSkipCount(3)); err != nil {
+		t.Fatal(err)
+	}
 	ctx := context.Background()
 
 	var addrs []string
@@ -56,18 +66,17 @@ func TestPubSub(t *testing.T) {
 			t.Fatal(err)
 		}
 	}()
-
+	if prefill {
-	/*
+		msgs := make([]*broker.Message, 0, msgcnt)
-			msgs := make([]*broker.Message, 0, 600000)
+		for i := int64(0); i < msgcnt; i++ {
-			for i := 0; i < 600000; i++ {
 			msgs = append(msgs, bm)
 		}
 
 		if err := b.BatchPublish(ctx, msgs); err != nil {
 			t.Fatal(err)
 		}
-		t.Skip()
+		//	t.Skip()
-	*/
+	}
 	done := make(chan bool, 1)
 	idx := int64(0)
 	fn := func(msg broker.Event) error {
@@ -78,7 +87,7 @@ func TestPubSub(t *testing.T) {
 
 	sub, err := b.Subscribe(ctx, "test", fn,
 		broker.SubscribeAutoAck(true),
-		broker.SubscribeGroup("test29"),
+		broker.SubscribeGroup(group),
 		broker.SubscribeBodyOnly(true))
 	if err != nil {
 		t.Fatal(err)
@@ -98,7 +107,11 @@ func TestPubSub(t *testing.T) {
 		for {
 			select {
 			case <-pticker.C:
-				fmt.Printf("processed %v\n", atomic.LoadInt64(&idx))
+				if prc := atomic.LoadInt64(&idx); prc == msgcnt {
+					close(done)
+				} else {
+					fmt.Printf("processed %v\n", prc)
+				}
 			case <-ticker.C:
 				close(done)
 			}

metrics.go

@@ -40,10 +40,10 @@ const (
 
 	metricBrokerThrottleLatencies = "broker_throttle_latencies"
 
-	metricBrokerProduceBytesCompressed   = "produce_bytes_compressed_total"
+	metricBrokerProduceBytesCompressed   = "broker_produce_bytes_compressed_total"
-	metricBrokerProduceBytesUncompressed = "produce_bytes_uncompressed_total"
+	metricBrokerProduceBytesUncompressed = "broker_produce_bytes_uncompressed_total"
-	metricBrokerFetchBytesUncompressed   = "broker_fetch_bytes_uncompressed_total"
+	metricBrokerFetchBytesCompressed     = "broker_consume_bytes_compressed_total"
-	metricBrokerFetchBytesCompressed     = "broker_fetch_bytes_compressed_total"
+	metricBrokerFetchBytesUncompressed   = "broker_consume_bytes_uncompressed_total"
 
 	metricBrokerGroupErrors = "broker_group_errors_total"
 

options.go

@@ -54,3 +54,12 @@ type commitIntervalKey struct{}
 func CommitInterval(td time.Duration) broker.Option {
 	return broker.SetOption(commitIntervalKey{}, td)
 }
+
+var DefaultSubscribeMaxInflight = 1000
+
+type subscribeMaxInflightKey struct{}
+
+// SubscribeMaxInFlight specifies interval to send commits
+func SubscribeMaxInFlight(n int) broker.SubscribeOption {
+	return broker.SetSubscribeOption(subscribeMaxInflightKey{}, n)
+}

util.go

@@ -0,0 +1,213 @@
+package kgo
+
+import (
+	"context"
+	"errors"
+	"sync"
+
+	kgo "github.com/twmb/franz-go/pkg/kgo"
+	"github.com/unistack-org/micro/v3/broker"
+	"github.com/unistack-org/micro/v3/logger"
+)
+
+var ErrLostMessage = errors.New("message not marked for offsets commit and will be lost in next iteration")
+
+var pPool = sync.Pool{
+	New: func() interface{} {
+		return &publication{msg: &broker.Message{}}
+	},
+}
+
+type worker struct {
+	done         chan struct{}
+	recs         chan []*kgo.Record
+	cherr        chan error
+	handler      broker.Handler
+	batchHandler broker.BatchHandler
+	opts         broker.SubscribeOptions
+	kopts        broker.Options
+	tpmap        map[string][]int32
+	maxInflight  int
+	reader       *kgo.Client
+	ctx          context.Context
+}
+
+func (s *subscriber) run(ctx context.Context) {
+	for {
+		select {
+		case <-ctx.Done():
+			return
+		case <-s.kopts.Context.Done():
+			return
+		default:
+			fetches := s.reader.PollFetches(ctx)
+			if fetches.IsClientClosed() {
+				// TODO: fatal ?
+				return
+			}
+			if len(fetches.Errors()) > 0 {
+				for _, err := range fetches.Errors() {
+					s.kopts.Logger.Fatalf(ctx, "fetch err topic %s partition %d: %v", err.Topic, err.Partition, err.Err)
+				}
+				// TODO: fatal ?
+				return
+			}
+
+			fetches.EachPartition(func(p kgo.FetchTopicPartition) {
+				s.Lock()
+				consumers := s.consumers[p.Topic]
+				s.Unlock()
+				if consumers == nil {
+					return
+				}
+				w, ok := consumers[p.Partition]
+				if !ok {
+					return
+				}
+				select {
+				case err := <-w.cherr:
+					s.kopts.Logger.Fatalf(ctx, "handle err: %v", err)
+					return
+				case w.recs <- p.Records:
+				case <-w.done:
+				}
+			})
+		}
+	}
+}
+
+func (s *subscriber) assigned(ctx context.Context, _ *kgo.Client, assigned map[string][]int32) {
+	maxInflight := DefaultSubscribeMaxInflight
+
+	if s.opts.Context != nil {
+		if n, ok := s.opts.Context.Value(subscribeMaxInflightKey{}).(int); n > 0 && ok {
+			maxInflight = n
+		}
+	}
+
+	s.Lock()
+	for topic, partitions := range assigned {
+		if s.consumers[topic] == nil {
+			s.consumers[topic] = make(map[int32]worker)
+		}
+		for _, partition := range partitions {
+			w := worker{
+				done:         make(chan struct{}),
+				recs:         make(chan []*kgo.Record),
+				cherr:        make(chan error),
+				kopts:        s.kopts,
+				opts:         s.opts,
+				ctx:          ctx,
+				tpmap:        map[string][]int32{topic: []int32{partition}},
+				reader:       s.reader,
+				handler:      s.handler,
+				batchHandler: s.batchhandler,
+				maxInflight:  maxInflight,
+			}
+			s.consumers[topic][partition] = w
+			go w.handle()
+		}
+	}
+	s.Unlock()
+}
+
+func (s *subscriber) revoked(_ context.Context, _ *kgo.Client, revoked map[string][]int32) {
+	s.Lock()
+	for topic, partitions := range revoked {
+		ptopics := s.consumers[topic]
+		for _, partition := range partitions {
+			w := ptopics[partition]
+			delete(ptopics, partition)
+			if len(ptopics) == 0 {
+				delete(s.consumers, topic)
+			}
+			close(w.done)
+		}
+	}
+	s.Unlock()
+}
+
+func (w *worker) handle() {
+	var err error
+
+	eh := w.kopts.ErrorHandler
+	if w.opts.ErrorHandler != nil {
+		eh = w.opts.ErrorHandler
+	}
+
+	paused := false
+	for {
+		select {
+		case <-w.ctx.Done():
+			w.cherr <- w.ctx.Err()
+			return
+		case <-w.done:
+			return
+		case recs := <-w.recs:
+			if len(recs) >= w.maxInflight {
+				paused = true
+				w.reader.PauseFetchPartitions(w.tpmap)
+			}
+			for _, record := range recs {
+				p := pPool.Get().(*publication)
+				p.msg.Header = nil
+				p.msg.Body = nil
+				p.topic = record.Topic
+				p.err = nil
+				p.ack = false
+				if w.opts.BodyOnly {
+					p.msg.Body = record.Value
+				} else {
+					if err := w.kopts.Codec.Unmarshal(record.Value, p.msg); err != nil {
+						p.err = err
+						p.msg.Body = record.Value
+						if eh != nil {
+							_ = eh(p)
+							if p.ack {
+								w.reader.MarkCommitRecords(record)
+							} else {
+								w.cherr <- ErrLostMessage
+								pPool.Put(p)
+								return
+							}
+							pPool.Put(p)
+							continue
+						} else {
+							if w.kopts.Logger.V(logger.ErrorLevel) {
+								w.kopts.Logger.Errorf(w.kopts.Context, "[kgo]: failed to unmarshal: %v", err)
+							}
+						}
+						pPool.Put(p)
+						w.cherr <- err
+						return
+					}
+				}
+				err = w.handler(p)
+				if err == nil && w.opts.AutoAck {
+					p.ack = true
+				} else if err != nil {
+					p.err = err
+					if eh != nil {
+						_ = eh(p)
+					} else {
+						if w.kopts.Logger.V(logger.ErrorLevel) {
+							w.kopts.Logger.Errorf(w.kopts.Context, "[kgo]: subscriber error: %v", err)
+						}
+					}
+				}
+				if p.ack {
+					pPool.Put(p)
+					w.reader.MarkCommitRecords(record)
+				} else {
+					pPool.Put(p)
+					w.cherr <- ErrLostMessage
+					return
+				}
+			}
+			if paused {
+				paused = false
+				w.reader.ResumeFetchPartitions(w.tpmap)
+			}
+		}
+	}
+}