I'm periodically seeing sqlite3_exec return SQLITE_CANTOPEN. Unfortunately, I haven't boiled this down to a simple sample that I can send to this list, but I thought I'd check to see if there is a known solution before I dive too deep. I'm using sqlite version 3.2.7 on windows.
Thanks! Pat The Details ----------- The sql statement that causes this always seems to be: "BEGIN IMMEDIATE" When I inspect my threads in the debugger, there is generally another transaction closing the database after a "COMMIT", and a third doing "BEGIN IMMEDIATE" concurrently. One peculiarity of my system is that I open and close a new "connection" to the database for each transaction. I also use a busy_handler that returns 1. I have debug log statement in my busy handler and I usually see it called just before this problem occurs. The threads look like this (snipped to sqlite calls): THREAD A - The thread from which the SQLITE_CANTOPEN is returned. The windows GetLastError appears to be "Access is denied" in an attempt to open the journal file. I've paused this stack at the line where the SQLITE_CANTOPEN is returned - line 286 of os_win.c App.exe!sqlite3OsOpenExclusive(const char * zFilename=0x02425b6a, OsFile * id=0x02423a58, int delFlag=0) Line 286 App.exe!pager_open_journal(Pager * pPager=0x024239f8) Line 2654 App.exe!sqlite3pager_begin(void * pData=0x024276f8, int exFlag=0) Line 2748 App.exe!sqlite3BtreeBeginTrans(Btree * pBt=0x02421730, int wrflag=1) Line 1638 App.exe!sqlite3VdbeExec(Vdbe * p=0x0240ccb8) Line 2337 App.exe!sqlite3_step(sqlite3_stmt * pStmt=0x0240ccb8) Line 217 App.exe!sqlite3_exec(sqlite3 * db=0x02427240, const char * zSql=0x0268c7e4, int (void *, int, char * *, char * *)* xCallback=0x00000000, void * pArg=0x00000000, char * * pzErrMsg=0x0268c468) Line 79 THREAD B, also doing a "BEGIN IMMEDIATE" App.exe!sqlite3OsFileExists(const char * zFilename=0x0241bb72) Line 148App.exe!hasHotJournal(Pager * pPager=0x02419a00) Line 2270 App.exe!sqlite3pager_get(Pager * pPager=0x02419a00, unsigned int pgno=1, void * * ppPage=0x0278b90c) Line 2336 App.exe!getPage(Btree * pBt=0x0241f7c0, unsigned int pgno=1, MemPage * * ppPage=0x0278ba10) Line 1125 App.exe!lockBtree(Btree * pBt=0x0241f7c0) Line 1445 App.exe!sqlite3BtreeBeginTrans(Btree * pBt=0x0241f7c0, int wrflag=1) Line 1634 App.exe!sqlite3VdbeExec(Vdbe * p=0x02422d58) Line 2337 App.exe!sqlite3_step(sqlite3_stmt * pStmt=0x02422d58) Line 217 App.exe!sqlite3_exec(sqlite3 * db=0x0241f970, const char * zSql=0x0278d02c, int (void *, int, char * *, char * *)* xCallback=0x00000000, void * pArg=0x00000000, char * * pzErrMsg=0x0278ccb0) Line 79 THREAD C, calling close after finishing up a transaction: App.exe!sqlite3OsClose(OsFile * id=0x0240a770) Line 416 App.exe!sqlite3pager_close(Pager * pPager=0x0240a718) Line 2011 App.exe!sqlite3BtreeClose(Btree * pBt=0x0243e800) Line 1299 App.exe!sqlite3_close(sqlite3 * db=0x0240d088) Line 159
