graphd crash when executing updateSessionsToMeta

[yixinglu]

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Describe the bug (required)

https://discuss.nebula-graph.com.cn/t/topic/11670/6

Your Environments (required)

• OS: uname -a
• Compiler: g++ --version or clang++ --version
• CPU: lscpu
• Commit id (e.g. a3ffc7d8)

How To Reproduce(required)

Steps to reproduce the behavior:

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

Expected behavior

Additional context

[jiangtao1234ji]

又出现了这个问题，我发现是在我大规模导数之后就会出现，但不知道是几天后出现，这个时间不固定，但是我只要一导数就一定会出现graphd挂掉的情况，数据量大多都在几亿。
导数后会做compact操作和stats操作。

[xtcyclist]

Nothing suspicious found on the crahsed code. Probabaly something went wrong on the memory. Need more infomration on what have been executed on the graphd when the crash happened, and need coredumps on each crash encountered. Need to know whether the graphd crash at the same place everytime.

[xtcyclist]

Closed this issue since we haven't got sufficient information since Jan. Please feel free to reopen this if you have more information.