RE: Deadlock when executing multiple select statements from multiple threads

Hi,

The deadlock with the ‘select’ statement is fixed, however it seems that the  other operations (update/insert/delete) still cause a similar deadlock too…(can be easily reproduced if you replace the selects with any of the other operations).
Regards,
Ayman

From: Inoue, Hiroshi [mailto:[email protected]]
Sent: Friday, April 13, 2018 6:52 PM
To: Ayman Samamry <[email protected]>
Cc: [email protected]; Henry Santosa <[email protected]>; Denn Sporcic <[email protected]>
Subject: Re: Deadlock when executing multiple select statements from multiple threads

Hi,
On 2018/04/11 12:03, Inoue, Hiroshi wrote:
Hi Ayman,

Thanks for the report.
I would examine the issue.

Could you please try the test drivers 10.02.0100 on Windows at
    https://winpg.jp/~inoue/psqlodbc/index.html
?

regards,
Hiroshi Inoue



regards,
Hiroshi Inoue
On 2018/04/10 14:51, Ayman Samamry wrote:
Hello,

We are having a deadlock issue when executing multiple select statements from multiple threads, the issue happens with driver version (9.6.4.0) or newer, doesn’t happen on 9.6.3.1 .
I’ve attached a simple project that triggers the deadlock, tested with visual studio 2017, release x64 build, PostgreSQL 10.3, usually happens after few runs.[please note that the proper database connection string and the table names need to be provided in the code for it to work].
I’ve also included the stack trace of the two threads in deadlock.

Regards,
Ayman

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