SessionPool error

[songqing]

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Describe the bug (required)

When I use SessionPool to test, I encountered some error messages, for example,
Channel got EOF. Check for server hitting connection limit, server connection idle timeout, and server crashes.bad ,
AsyncSocketException: writev failed (peer=xx:9669, local=172.17.0.2:43164), type = Internal error, errno = 104 (Connection reset by peer): Connection reset by peer

I noticed that when the client didn't send any request over 20 minutes, then did a query, the error would appear, and graphd's config option "client_idle_timeout_secs" and "session_idle_timeout_secs" is 2h.

It seems that the error has something with the idle time, but not consistent with graphd's idle time config.
So, it's weird, can someone help me?

Your Environments (required)

• OS: uname -a :centos7
• Commit id (e.g. a3ffc7d8) : master

How To Reproduce(required)

Steps to reproduce the behavior:

1. Step 1
2. Step 2
3. Step 3

Expected behavior

Additional context

[songqing]

@Shylock-Hg @jievince Could you help to see this issue?

[songqing]

Besides, I notice that the cpp client has not implemented the "retryConnect()" function while java or other client has implemented, does this matter?

[songqing]

fixed in PR 120