pg_receivewal.exe unhandled exception in zlib1.dll - Mailing list pgsql-hackers

From Juan José Santamaría Flecha
Subject pg_receivewal.exe unhandled exception in zlib1.dll
Date
Msg-id CAC+AXB1iY4pM=o55OBuUy30LmUo5hjY83=TcA-NgY3CGZpzJmA@mail.gmail.com
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Responses Re: pg_receivewal.exe unhandled exception in zlib1.dll  (Andres Freund <andres@anarazel.de>)
List pgsql-hackers
Hello,

If you execute pg_receivewal.exe with the option "--compression-method gzip" it will fail with no error. You can see an error in the db log:

2022-02-10 11:46:32.725 CET [11664][walsender] [pg_receivewal][3/0:0] LOG:  could not receive data from client: An existing connection was forcibly closed by the remote host.

Tracing the execution you can see:

Unhandled exception at 0x00007FFEA78C1208 (ucrtbase.dll) in An invalid parameter was passed to a function that considers invalid parameters fatal.
  ucrtbase.dll!00007ff8e8ae36a2() Unknown
> zlib1.dll!gz_comp(gz_state * state, int flush) Line 111 C
  zlib1.dll!gz_write(gz_state * state, const void * buf, unsigned __int64 len) Line 235 C
  pg_receivewal.exe!dir_write(void * f, const void * buf, unsigned __int64 count) Line 300 C
  pg_receivewal.exe!ProcessXLogDataMsg(pg_conn * conn, StreamCtl * stream, char * copybuf, int len, unsigned __int64 * blockpos) Line 1150 C
  pg_receivewal.exe!HandleCopyStream(pg_conn * conn, StreamCtl * stream, unsigned __int64 * stoppos) Line 850 C
  pg_receivewal.exe!ReceiveXlogStream(pg_conn * conn, StreamCtl * stream) Line 605 C
  pg_receivewal.exe!StreamLog() Line 636 C
  pg_receivewal.exe!main(int argc, char * * argv) Line 1005 C

The problem comes from the file descriptor passed to gzdopen() in 'src/bin/pg_basebackup/walmethods.c'. Using gzopen() instead, solves the issue without ifdefing for WIN32. Please find attached a patch for so.

Regards,

Juan José Santamaría Flecha
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