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Posted to notifications@skywalking.apache.org by GitBox <gi...@apache.org> on 2018/05/09 08:33:39 UTC
[GitHub] candyleer opened a new issue #1196: Complex span info for
AsyncHttpClient and exception
candyleer opened a new issue #1196: Complex span info for AsyncHttpClient and exception
URL: https://github.com/apache/incubator-skywalking/issues/1196
Please answer these questions before submitting your issue.
- Why do you submit this issue?
- [ ] Question or discussion
- [ ] Bug
- [ ] Requirement
- [x] Feature or performance improvement
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### Question
- What do you want to know?
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### Bug
- Which version of SkyWalking, OS and JRE?
master latest
- Which company or project?
- What happen?
#### Improvement
If I send a request with `Async Http Client`,it will generate 5 span info and these make me confused what does these span mean ,maybe end users only concern the main cost for the http request.
below the image show one request that the async http client generate.
#### Exception
another issue
some times it will throw some exception but not every time and I cannot pinpoint the reason when I read the code
```
ERROR 2018-05-09 15:52:38 InstMethodsInter : class[class org.apache.http.impl.nio.reactor.DefaultConnectingIOReactor] after method[processEvent] intercept failure
java.lang.NullPointerException
at org.apache.skywalking.apm.agent.core.context.ContextManager.activeSpan(ContextManager.java:155)
at org.apache.skywalking.apm.agent.core.context.ContextManager.stopSpan(ContextManager.java:159)
at org.apache.skywalking.apm.plugin.httpasyncclient.v4.DefaultConnectingIOReactorIterceptor.afterMethod(DefaultConnectingIOReactorIterceptor.java:51)
at org.apache.skywalking.apm.agent.core.plugin.interceptor.enhance.InstMethodsInter.intercept(InstMethodsInter.java:105)
at org.apache.http.impl.nio.reactor.DefaultConnectingIOReactor.processEvent(DefaultConnectingIOReactor.java)
at org.apache.http.impl.nio.reactor.DefaultConnectingIOReactor.processEvents(DefaultConnectingIOReactor.java:145)
at org.apache.http.impl.nio.reactor.AbstractMultiworkerIOReactor.execute(AbstractMultiworkerIOReactor.java:348)
at org.apache.http.impl.nio.conn.PoolingNHttpClientConnectionManager.execute(PoolingNHttpClientConnectionManager.java:194)
at org.apache.http.impl.nio.client.CloseableHttpAsyncClientBase$1.run(CloseableHttpAsyncClientBase.java:64)
at java.lang.Thread.run(Thread.java:748)
ERROR 2018-05-09 15:52:38 InstMethodsInter : class[class org.apache.http.impl.nio.conn.CPool] before method[requestCompleted] intercept failure
java.lang.IllegalArgumentException: ContextSnapshot can't be null.
at org.apache.skywalking.apm.agent.core.context.ContextManager.continued(ContextManager.java:147)
at org.apache.skywalking.apm.plugin.httpasyncclient.v4.SuccessInterceptor.beforeMethod(SuccessInterceptor.java:46)
at org.apache.skywalking.apm.agent.core.plugin.interceptor.enhance.InstMethodsInter.intercept(InstMethodsInter.java:82)
at org.apache.http.nio.pool.AbstractNIOConnPool.requestCompleted(AbstractNIOConnPool.java)
at org.apache.http.nio.pool.AbstractNIOConnPool$InternalSessionRequestCallback.completed(AbstractNIOConnPool.java:836)
at org.apache.http.impl.nio.reactor.SessionRequestImpl.completed(SessionRequestImpl.java:135)
at org.apache.http.impl.nio.reactor.AbstractIOReactor.processNewChannels(AbstractIOReactor.java:424)
at org.apache.http.impl.nio.reactor.AbstractIOReactor.execute(AbstractIOReactor.java:287)
at org.apache.http.impl.nio.reactor.BaseIOReactor.execute(BaseIOReactor.java:104)
at org.apache.http.impl.nio.reactor.AbstractMultiworkerIOReactor$Worker.run(AbstractMultiworkerIOReactor.java:588)
at java.lang.Thread.run(Thread.java:748)
```
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### Requirement or improvement
- Please describe about your requirements or improvement suggestions.
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