131 lines
2.9 KiB
Markdown
131 lines
2.9 KiB
Markdown
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## 常见问题
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##### 1.成功发布商品后商品列表没有看到新发布的商品
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##### 2.成功修改了商品的信息，但列表中显示的数据还是旧的
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## 排查步骤
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注意： 配置成功后，丢失的数据不会自动补全的，需要到mysql中更新对应表，来触发数据同步，例：
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`场景`：新增的商品没有显示
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`处理方案`：
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1. 按下面的步骤将canal相关配置更正
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2. (这一步也很重要)配置成功后，更新表中的字段，触发数据同步， 比如：更新商品表的时间字段`update set set update_time = now()`
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### 1.canal没有读取到mysql的binlog
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mysql查询binglog位置
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```mysql
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SHOW MASTER STATUS
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```
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编辑`./canal/conf/example/instance.properties`
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修改以下四个参数
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```properties
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# 填写数据库地址
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canal.instance.master.address=192.168.193.128:3306
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# 填写执行命令`SHOW MASTER STATUS`后的File内容
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canal.instance.master.journal.name=mysql-binlog.000001
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# username/password
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# 填写数据库账号
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canal.instance.dbUsername=canal
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# 填写数据库密码
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canal.instance.dbPassword=hn02le.34lkdLKD
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```
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重启`canal`
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```shell
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docker restart mall4cloud-canal
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```
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### 2.canal没有连接上RocketMQ
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查看 `./canal/logs/example` 中的 `example.log`
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日志：
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编辑`./canal/conf/canal.properties`
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```properties
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# 填写RocketMQ地址
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rocketmq.namesrv.addr = 192.168.193.128:9876
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```
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重启`canal`
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```shell
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docker restart mall4cloud-canal
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```
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### 3. RocketMQ消息超出长度限制
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查看 `./canal/logs/example` 中的 `example.log`， 如果是以下报错信息，就是消息长度超过限制了
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```
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the message is illegal, maybe msg body or properties length not matched. msg body length limit 128k
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```
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编辑 `./rocketmq/broker/conf` 中的 `broker.conf`
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```
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#限制的消息大小
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maxMessageSize=4194304
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```
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重启`rocketmq`
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```shell
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docker restart mall4cloud-rocketmq-broker
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```
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### 4. 更改过mq或者数据库名称
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如果有更改过数据库名称，且canal已配置成，可以发送mq后，数据还是没有更新
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先去mq的控制台, 查看队列`canal-topic`的消费情况，
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mq没有被消费，按以下情况进行排查：
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- `mall4cloud-search`服务没启动
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- `mall4cloud-search`服务执行异常，看日志处理下
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- canal中配置的队列名称和`mall4cloud-search`服务中监听的不一致，如果没有更改过mq队列名称，则忽略此步骤
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更改了数据库、表名称：mq消费成功，但数据还是不正确，解决方法：
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将`@CanalModel`中配置的数据库和表名与mysql中的对应上
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