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Pinpoint监控Apache HTTP Client问题

Posted on Edited on Disqus:

在启用Pinpoint监控后，发现调用阿里MNS会出这个诡异的问题

Caused by: java.net.SocketTimeoutException
at org.apache.http.nio.protocol.HttpAsyncRequestExecutor.timeout(HttpAsyncRequestExecutor.java:351)
at org.apache.http.impl.nio.client.InternalIODispatch.onTimeout(InternalIODispatch.java:92)
at org.apache.http.impl.nio.client.InternalIODispatch.onTimeout(InternalIODispatch.java:39)
at org.apache.http.impl.nio.reactor.AbstractIODispatch.timeout(AbstractIODispatch.java:177)
at org.apache.http.impl.nio.reactor.BaseIOReactor.sessionTimedOut(BaseIOReactor.java:265)
at org.apache.http.impl.nio.reactor.AbstractIOReactor.timeoutCheck(AbstractIOReactor.java:494)
at org.apache.http.impl.nio.reactor.BaseIOReactor.validate(BaseIOReactor.java:215)
at org.apache.http.impl.nio.reactor.AbstractIOReactor.execute(AbstractIOReactor.java:282)
at org.apache.http.impl.nio.reactor.BaseIOReactor.execute(BaseIOReactor.java:106)
at org.apache.http.impl.nio.reactor.AbstractMultiworkerIOReactor$Worker.run(AbstractMultiworkerIOReactor.java:590)

最后发现是由HttpEntity不可重复导致的，把pinpoint.config的下列配置改为false即可

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# Dump entities of POST and PUT requests. Limited to entities where HttpEntity.isRepeatable() == true.
profiler.apache.httpclient4.entity=false

关于HttpEntity的说明，可参考官方文档

An entity that can be sent or received with an HTTP message. Entities can be found in some requests and in responses, where they are optional.
There are three distinct types of entities in HttpCore, depending on where their content originates:

  • streamed: The content is received from a stream, or generated on the fly. In particular, this category includes entities being received from a connection. Streamed entities are generally not repeatable.
  • self-contained: The content is in memory or obtained by means that are independent from a connection or other entity. Self-contained entities are generally repeatable.
  • wrapping: The content is obtained from another entity.

This distinction is important for connection management with incoming entities. For entities that are created by an application and only sent using the HTTP components framework, the difference between streamed and self-contained is of little importance. In that case, it is suggested to consider non-repeatable entities as streamed, and those that are repeatable (without a huge effort) as self-contained.