kezhenxu94 commented on a change in pull request #4187: make a suggestion about
DUBBO plugin
URL: https://github.com/apache/skywalking/pull/4187#discussion_r363594229
##########
File path:
apm-sniffer/apm-sdk-plugin/dubbo-plugin/src/main/java/org/apache/skywalking/apm/plugin/dubbo/DubboInterceptor.java
##########
@@ -56,6 +57,9 @@ public void beforeMethod(EnhancedInstance objInst, Method
method, Object[] allAr
Class<?>[] argumentsTypes, MethodInterceptResult result) throws
Throwable {
Invoker invoker = (Invoker)allArguments[0];
Invocation invocation = (Invocation)allArguments[1];
+ if
(invocation.getAttachments().containsKey(SW3CarrierItem.HEADER_NAME)) {
+ invocation.getAttachments().remove(SW3CarrierItem.HEADER_NAME);
+ }
Review comment:
> When dubbo retry, the parameter sw3 will not be updated.
@tzy1316106836 what @wu-sheng meant is that you should not simply use
`SW3CarrierItem.HEADER_NAME` as key to remove the context, you should use
something likeļ¼
```java
CarrierItem next = contextCarrier.items();
while (next.hasNext()) {
next = next.next();
rpcContext.getAttachments().remove(next.getHeadKey());
}
```
because there are chances that the users are using SkyWalking 6.x, which
uses protocol v2 and the key is `SW6CarrierItem.HEADER_NAME` instead of
`SW3CarrierItem.HEADER_NAME`, what's more, `SW3CarrierItem` will be removed soon
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