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Posted to dev@rocketmq.apache.org by GitBox <gi...@apache.org> on 2021/11/29 02:53:11 UTC
[GitHub] [rocketmq-client-go] jwrookie opened a new issue #746: repeated consumption caused by retry
jwrookie opened a new issue #746:
URL: https://github.com/apache/rocketmq-client-go/issues/746
测试场景：
● 一个生产者，生产5条消息，默认4个队列
● 3个消费者
消费者：
`
package main
import (
"context"
"fmt"
"os"
"time"
"github.com/apache/rocketmq-client-go/v2"
"github.com/apache/rocketmq-client-go/v2/consumer"
"github.com/apache/rocketmq-client-go/v2/primitive"
)
func main() {
c, _ := rocketmq.NewPushConsumer(
consumer.WithGroupName("testGroup007"),
consumer.WithNsResolver(primitive.NewPassthroughResolver([]string{"172.17.0.6:9876"})),
consumer.WithConsumeMessageBatchMaxSize(1),
)
err := c.Subscribe("test007", consumer.MessageSelector{}, func(ctx context.Context,
msgs ...*primitive.MessageExt) (consumer.ConsumeResult, error) {
fmt.Println(len(msgs))
for i := range msgs {
fmt.Printf("subscribe callback: %v \n", msgs[i])
}
fmt.Println("---------------------------------")
time.Sleep(time.Second * 1)
return consumer.ConsumeRetryLater, nil
})
if err != nil {
fmt.Println(err.Error())
}
// Note: start after subscribe
err = c.Start()
if err != nil {
fmt.Println(err.Error())
os.Exit(-1)
}
time.Sleep(time.Hour)
err = c.Shutdown()
if err != nil {
fmt.Printf("shutdown Consumer error: %s", err.Error())
}
}
`
结果：发现重试队列有非常多重复的数据
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[GitHub] [rocketmq-client-go] jwrookie commented on issue #746: repeated consumption caused by retry
Posted by GitBox <gi...@apache.org>.
jwrookie commented on issue #746:
URL: https://github.com/apache/rocketmq-client-go/issues/746#issuecomment-984320878
>
这会导致消费者拿到重复的记录
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[GitHub] [rocketmq-client-go] vongosling closed issue #746: repeated consumption caused by retry
Posted by GitBox <gi...@apache.org>.
vongosling closed issue #746:
URL: https://github.com/apache/rocketmq-client-go/issues/746
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[GitHub] [rocketmq-client-go] maixiaohai commented on issue #746: repeated consumption caused by retry
Posted by GitBox <gi...@apache.org>.
maixiaohai commented on issue #746:
URL: https://github.com/apache/rocketmq-client-go/issues/746#issuecomment-984292512
If a message can not be conumsed success, it will resend to retry topic base on the retry strategy.
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