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125 lines
3.4 KiB
125 lines
3.4 KiB
# 常见问题
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## Connection has been closed BEFORE send operation
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压测时出现`Connection has been closed BEFORE send operation`，`java.nio.channels.ClosedChannelException`之类的错误
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- 解决办法
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尝试调大内存分配1G或2G，`-Xms1g -Xmx1g`
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## spring cloud gateway [DataBufferLimitException: Exceeded limit on max bytes to buffer : 262144]
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如果POST请求body内容太大可能会报这个错误
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- 解决版办法
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网关指定配置`spring.codec.max-in-memory-size=xx`，xx默认是262144，即256K（262144=256*1024）
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## primordials is not defined
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node版本太高导致与gulp版本不兼容，解决方法：node退回11版本。参考https://blog.csdn.net/zxxzxx23/article/details/103000393
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## Nacos指定group
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可在配置文件中添加：`spring.cloud.nacos.discovery.group=xxx`指定group，不加默认是：DEFAULT_GROUP
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## 在SpringCloudGateway中获取请求参数
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```java
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ApiParam apiParam = ServerWebExchangeUtil.getApiParam(exchange);
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```
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## 微服务端如何获取appId等参数
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```java
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OpenContext openContext = ServiceContext.getCurrentContext().getOpenContext();
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System.out.println("app_id:" + openContext.getAppId());
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System.out.println("token:" + openContext.getAppAuthToken());
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```
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## 如何关闭签名验证
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- 针对某一个接口关闭签名验证
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`@Open(value = "alipay.story.get", ignoreValidate = true)`
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## 注册到eureka显示hostname，非ip
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```properties
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eureka.instance.prefer-ip-address=true
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eureka.instance.instance-id=${spring.cloud.client.ip-address}:${server.port}
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```
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```xml
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<dependency>
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<groupId>org.springframework.cloud</groupId>
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<artifactId>spring-cloud-commons</artifactId>
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</dependency>
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```
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参考：https://www.jianshu.com/p/5ad8317961b7
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## 直接访问服务的swagger-ui.html ，提示access forbidden
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找到微服务的`OpenServiceConfig.java`，重写内部类Swagger2中的swaggerAccessProtected()方法，返回false。线上请设置成true
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```java
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// 开启文档
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@Configuration
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@EnableSwagger2
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public static class Swagger2 extends SwaggerSupport {
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@Override
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protected String getDocTitle() {
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return "故事API";
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}
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@Override
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protected boolean swaggerAccessProtected() {
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return false;
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}
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}
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```
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## 调试网关出现服务不可用
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打断点调试，网关出现Read Timeout
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参考：https://blog.csdn.net/qq_36872046/article/details/81058045
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yml添加：
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```properties
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# https://blog.csdn.net/qq_36872046/article/details/81058045
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# 路由转发超时时间，毫秒，默认值1000，详见：RibbonClientConfiguration.DEFAULT_READ_TIMEOUT。
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# 如果微服务端 处理时间过长，会导致ribbon read超时，解决办法将这个值调大一点
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ribbon.ReadTimeout= 60000
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```
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## 其它微服务没有开放接口，需要排除
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在sop-gateway项目中配置
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```properties
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# 排除服务，多个用,隔开
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sop.service.exclude=your-serviceId1,your-serviceId2
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```
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或者使用正则：
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```properties
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# 排除以"test-"开头的
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# 多个正则用英文分号(;)隔开
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sop.service.exclude-regex=test\\-.*
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```
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## ISV公私钥 & 平台公私钥
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```java
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ISV私钥（必须）：ISV保存，用来生成签名 --> ISV公钥（必须）：平台保存，用来校验签名是否正确
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平台私钥（非必须）：平台保存，对返回结果生成签名 --> 平台公钥（非必须）：ISV保存，用来校验签名是否正确
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```
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总结：私钥负责加密生成签名，公钥负责校验签名是否正确
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