I understand. I'll keep my eyes open for future updates. Thanks, Gili
On Tuesday, September 16, 2014 2:15:52 AM UTC-4, Thomas Mueller wrote: > > Hi, > > I'm afraid the only thing I can do currently is to improve the > documentation. H2 does not currently support using different transaction > isolation levels for different connections. > > With the MVStore + TransactionStore combination, hopefully this > restriction can be removed in the future, but right now this is not a > priority (first, the MVStore needs to get stable). > > Regards, > Thomas > > > > On Sunday, September 14, 2014, Gili <cow...@bbs.darktech.org <javascript:>> > wrote: > >> Hi, >> >> I just spent two days tracking down a race condition that ended up being >> caused by a H2 "feature". >> >> It seems that when one thread invokes >> Connection.setTransactionIsolation() it affects all other connections. It >> turns out that invoking this method invokes "SET LOCK_MODE" under the hood >> and according to >> http://www.h2database.com/html/grammar.html#set_lock_mode "This setting >> affects all connections." >> >> Thomas and Noel, I believe this behavior violates the JDBC specification >> (which states the method affects the current connection, no mention of the >> entire database)... but even if it does not, it causes me major grief. Most >> methods of my application require READ_COMMITTED but update operations >> require REPEATABLE_READ and insert operations require SERIALIZABLE. This >> behavior forces me to upgrade all connections to SERIALIZABLE which makes >> the service unusable in production. >> >> Seeing as you are working on MVCC, is this something you could fix in the >> near future? >> >> Thanks, >> Gili >> >> -- >> You received this message because you are subscribed to the Google Groups >> "H2 Database" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to h2-database+unsubscr...@googlegroups.com. >> To post to this group, send email to h2-database@googlegroups.com. >> Visit this group at http://groups.google.com/group/h2-database. >> For more options, visit https://groups.google.com/d/optout. >> > -- You received this message because you are subscribed to the Google Groups "H2 Database" group. To unsubscribe from this group and stop receiving emails from it, send an email to h2-database+unsubscr...@googlegroups.com. To post to this group, send email to h2-database@googlegroups.com. Visit this group at http://groups.google.com/group/h2-database. For more options, visit https://groups.google.com/d/optout.
