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FB crashes when database is in full shutdown and several sessions make attempts to attach to this DB in infinite loop (3.0 SuperServer only is affected) [CORE6196] #6441

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firebird-issue-importer opened this issue Nov 23, 2019 · 0 comments

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@firebird-issue-importer

Submitted by: @pavel-zotov

1. Create database and change its state to full shutdown

2. Prepare firebird.conf:

RemoteServicePort = 3333
IpcName = fb30\_SS
BugcheckAbort = 1
FileSystemCacheThreshold = 65536K
Servermode = Super
DefaultDbCachePages = 512K
TempBlockSize = 2M
TempCacheLimit = 64M
LockHashSlots = 22111
LockMemSize = 5M
 
MaxUnflushedWrites = \-1
MaxUnflushedWriteTime = \-1
 
ExternalFileAccess = full
TempDirectories = D:\\TEMP\\fbb
MaxUserTraceLogSize = 99999
 
AuthServer = Legacy\_Auth,Srp,Win\_Sspi
AuthClient = Legacy\_Auth,Srp,Win\_Sspi
UserManager = Legacy\_UserManager,Srp
 
WireCompression = false
WireCrypt = Enabled
KeyHolderPlugin = KeyHolder

=======

3. Create batch file (change variables 'fbc' and 'dsn' according to your environment):

@echo off
setlocal enabledelayedexpansion enableextensions

set dtm=19000101000000
call :get\_ANSI\_precise\_dts dtm time\_only
set dtm=\!dtm::=\!
set dtm=\!dtm:\.=\_\!
set err\_file=%\~dpn0\.\!dtm\!\.err

set fbc=C:\\FB\\30SS
set dsn=localhost:e30

set fbn=firebird\.exe
set err=%\~dpn0\.
set /a iter=0
:m1
    set /a iter=\!iter\!\+1
    echo \!time\! iter #⁠ \!iter\!
    echo quit; \| \!fbc\!\\isql \!dsn\! \-q \-user sysdba \-pas masterkey 1\>nul 2\>\!err\_file\!
    findstr /m /c:"SQLSTATE = 08006" \!err\_file\! 1\>nul
    if NOT errorlevel 1 \(
        echo \!time\! No reply from Firebird server\. Bye\-bye\.
        del \!err\_file\!
        goto final
    \)
    del \!err\_file\!
goto m1


:get\_ANSI\_precise\_dts
    setlocal
    for /f "tokens=1\-2 delims=\.\+" %%a in \('wmic\.exe OS GET LocalDateTime ^\| findstr /r /b /c:"20\.\*\."' \) do \(
        set current\_dts=%%a
        set ms\_value=%%b
    \)
    set current\_dts=\!current\_dts\!\.\!ms\_value:\~0,2\!

    @rem 20191021\|201404\.22
    @rem 01234567\|890123456

    set time\_ms=\!current\_dts:\~\-9\!
    set current\_time=\!time\_ms:\~0,2\!:\!time\_ms:\~2,2\!:\!time\_ms:\~\-5\!
    if /i \.%2\.==\.time\_only\. \(
        set result=\!current\_time\!
    \) else \(
        set current\_date=\!current\_dts:\~0,8\!
        set current\_date=\!current\_date:\~\-2\!\.\!current\_date:\~4,2\!\.\!current\_dts:\~0,4\!
        set result=\!current\_date\! \!current\_time\!
    \)
    endlocal & set "%\~1=%result%"
goto:eof


:final

=======

4. Open two cmd.exe and launch this batch in both of them.

After very short time FB will crach. Both sessions of running batch will stop themselves because get "SQLSTATE = 08006" in STDERR.

Here are dump, stack-trace, firebird.conf and .log:

https://drive.google.com/open?id=13KPHXcYhJFBByqFtF1mfPV08KmpDgsF0

PS.

SuperServer only is affected, and only 3.0 (I've checked WI-V3.0.5.33184).
No such effect on SC and on 4.0 (any mode).

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