[sqlite] Memory corruption in a mutilthreaded environment
I have a program with multiple threads. The threads do not share the same handle.Occcasionally the program dies with a core. I see a thread always with the following stack: #3 0x6000d336b7c0:0 in closeDB () at ../lang/sql/generated/sqlite3.c:35553 #4 0x6000d3388c60:0 in btreeInvalidateHandleCache () at ../lang/sql/generated/sqlite3.c:37914 #5 0x6000d3387540:0 in sqlite3BtreeBeginTrans () at ../lang/sql/generated/sqlite3.c:37987 #6 0x6000d33d2cc0:0 in sqlite3InitOne () at ../lang/sql/generated/sqlite3.c:80206 #7 0x6000d33d1b80:0 in sqlite3Init () at ../lang/sql/generated/sqlite3.c:80378 #8 0x6000d33d1770:0 in sqlite3LocateTable () at ../lang/sql/generated/sqlite3.c:80416 #9 0x6000d33cebb0:0 in selectExpander () at ../lang/sql/generated/sqlite3.c:84064 #10 0x6000d33ce780:0 in sqlite3SelectExpand () at ../lang/sql/generated/sqlite3.c:60440 #11 0x6000d33ce470:0 in sqlite3SelectPrep () at ../lang/sql/generated/sqlite3.c:84343 #12 0x6000d3444580:0 in sqlite3Select () at ../lang/sql/generated/sqlite3.c:84599 #13 0x6000d33ab080:0 in yy_reduce () ---Type to continue, or q to quit--- at ../lang/sql/generated/sqlite3.c:95943 #14 0x6000d33a9100:0 in sqlite3Parser () at ../lang/sql/generated/sqlite3.c:96910 #15 0x6000d33a3410:0 in sqlite3RunParser () at ../lang/sql/generated/sqlite3.c:97749 #16 0x6000d33e7110:0 in sqlite3Prepare () at ../lang/sql/generated/sqlite3.c:80564 #17 0x6000d351b640:0 in sqlite3_prepare_v2 () This may or may not anything to do with the problem - my question why is sqlite trying to close the database ? Thanks for your help. ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
[sqlite] SQL logic error or missing database error
I get the following error while opening the database after a system reboot. SQL logic error or missing database The problem does not happen with the subsequent open with a new process. Is there any reason why we get these errors? ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
Re: [sqlite] SQL logic error or missing database error
Why would it work with the subseqyent open if there was a problem with the install ? ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
[sqlite] database disk image is malformed - Error
I have a mult-threaded application. Each thread uses its own database handle. One thread got a return value of 11 (disk image malformed) - with the sqlite3_step statement (select statement). When we restarted the application after the failure the database recovered and did not give any error. Why did the "sqlite3_step" statement returned a "disk malformed" error when the disk is not corrupt ? Any help will be appreciated. ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
Re: [sqlite] database disk image is malformed - Error
David, Thanks. Do you still have the problem ? Did you find a workaround to avoid the problem - appreciate your response. regards, Rittick ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
Re: [sqlite] database disk image is malformed - Error
Do you think a retry of the query would help resolve this issue ? Do I have to close & reopen the database. Thanks for your help. regards, Rittick ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
[sqlite] Usage of sqlite3_db_release_memory
What memory does the sqlite3_db_release_memory call release from the heap. Is it required that this call be made frequently to free up space which is no longer used ? Is it applicable in a shared cache environment ? Will appreciate a response. ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
[sqlite] Difference between SQLITE_CONFIG_MULTITHREAD & SQLITE_CONFIG_SERIALIZED options
What is the difference between the SQLITE_CONFIG_MULTITHREAD & SQLITE_CONFIG_SERIALIZED options - When a) the same handle is shared between multiple threads in a process and when different handles are used by threads in a proceses. Is there any difference in concurrency ? What should be used in a multi threaded process with more than one thread updating and reading the database. ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
