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From: Imseih (AWS), Sami <[email protected]>
To: Kyotaro Horiguchi <[email protected]>
To: [email protected] <[email protected]>
Cc: [email protected] <[email protected]>
Cc: [email protected] <[email protected]>
Subject: Re: [BUG] Panic due to incorrect missingContrecPtr after promotion
Date: Fri, 24 Jun 2022 16:17:34 +0000
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
References: <[email protected]>
	<[email protected]>
	<[email protected]>
	<[email protected]>

>    Thus, I still don't see what have happened at Imseih's hand, but I can
>    cause PANIC with a bit tricky steps, which I don't think valid.  This
>    is what I wanted to know the exact steps to cause the PANIC.

>    The attached 1 is the PoC of the TAP test (it uses system()..), and
>    the second is a tentative fix for that.  (I don't like the fix, too,
>    though...)

It is been difficult to get a generic repro, but the way we reproduce
Is through our test suite. To give more details, we are running tests
In which we constantly failover and promote standbys. The issue
surfaces after we have gone through a few promotions which occur
every few hours or so ( not really important but to give context ).

I am adding some additional debugging  to see if I can draw a better
picture of what is happening. Will also give aborted_contrec_reset_3.patch 
a go, although I suspect it will not handle the specific case we are deaing with.


Regards,

Sami imseih
Amazon Web Services

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