Hello, I'm writing a multithreaded application (sqlite 3.7.9 on linux i386). First thread exports some parts of a database, deletes exported records and starts a vacuum. Second thread tries to write in database. When my application tries to write data when the other thread is running vacuum, sqlite3_step() returns SQL_BUSY. I have set busy_timeout to 1000.
If sqlite3_step() returns BUSY_TIMEOUT, I try to restart statement : While((result = sqlite3_step(stmt)) == SQLITE_BUSY) { Usleep(_random [0s, 1s[_); } But this loop always enters in a deadlock : if sqlite3_step() returns SQLITE_BUSY, and if I try to restart the same statement, it always will returns SQLITE_BUSY even if there is no other concurrent transaction. If I write : Int I = 0; While((result = sqlite3_step(stmt)) == SQLITE_BUSY) { Usleep(_random [0s, 1s[_); If (++I > 10) break; } I have forgotten current statement (and data) but following SQL query returns SQLITE_OK. Why does sqlite3_step() always returns SQLITE_BUSY on a statement when it has returned SQLITE_BUSY the first time ? Regards, JB GDF SUEZ Mail Disclaimer: http://www.gdfsuez.com/disclaimer/disclaimer-fr.html _______________________________________________ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users