| From: | "lichuancheng(at)highgo(dot)com" <lichuancheng(at)highgo(dot)com> |
|---|---|
| To: | "pgsql-bugs(at)lists(dot)postgresql(dot)org" <pgsql-bugs(at)lists(dot)postgresql(dot)org> |
| Subject: | BUG #15567: Wal receiver process restart failed when a damaged wal record arrived at standby. |
| Date: | 2019-01-03 09:50:48 |
| Message-ID: | 2019010317504815140834@highgo.com |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-bugs |
hello
I have analysis of the causes of bug when report it.
>[Code review]
>I read the code about startup process and walreciver process.
>When a damaged wal record arrived:
>1.The startup process shutdown the walreciver process use function ShutdownWalRcv().
>2.The startup process start the walreciver process use funtion RequestXLogStreaming() by signal PMSIGNAL_START_WALRECEIVER.
>3.The startup process try to read wal record.
> And now reciver process does not startup completely,so the startup process read the damaged wal record another times.
> And startup process set walrcv->walRcvState = WALRCV_STOPPED use function ShutdownWalRcv().
>4.go to 2.
>That's the infinite cycle.
And now i do a patch in mail attachment to solve the bug.
I test it on pg10.5 and work well.
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movead
| Attachment | Content-Type | Size |
|---|---|---|
| bug15567_lichuancheng_20190103.patch | application/octet-stream | 992 bytes |
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