The select then wouldn't be able to acquire a lock until that transaction / process had stopped doing it's thing.Ĭorrect me if I am wrong, but with Snapshot Isolation mode, the Select wouldn't even need to acquire the lock? quote: I presume that the select failed because the table was being updated or inserted into by some other process.
#DATABASE DEADLOCK EXCEPTION UPDATE#
The select then wouldn't be able to acquire a lock until that transaction / process had stopped doing it's thing.There's probably a process that's doing something extremely inefficiently with the update or insert.If that's the case then going to Snapshot Isolation mode is still just ignoring the warning signs of the other problem.Charlie = Msg 3903, Level 16, State 1, Line 1736The ROLLBACK TRANSACTION request has no corresponding BEGIN TRANSACTION select) can block writers.I believe a solution is to go to Snapshot Isolation mode (as long as you are 2005+), in which case I'd be curious how it helps you:(VS.80).aspx But it could force another query to wait because unlike in Oracle, readers (ie. But I can't see how a select on its own could cause a deadlock. Insert, delete, update)? If so, I could see it. Was it part of a transaction involving some kind of write operation (ie. You can use hints to get round the problem but that isn't good practice and is just hiding from the real issue.Presumably some other process was updating or inserting into the table that you were reading from.Ho many processes running on your database?Charlie = Msg 3903, Level 16, State 1, Line 1736The ROLLBACK TRANSACTION request has no corresponding BEGIN TRANSACTION You should find out which transaction was causing the deadlock. Rerun the transaction."Is this because the query joins multiple tables and requests shared locks on them in sequence somehow causing a deadlock with another query? Should I use query hints to avoid the deadlock or should I retry running the query? What's the recommended approach?Thanks. SQL Server threw the following exception while executing a SELECT-query:"Transaction (Process ID 54) was deadlocked on lock resources with another process and has been chosen as the deadlock victim. How can a read-only query cause a deadlock?
We've got lots of great SQL ServerĮxperts to answer whatever question you can come up with. What I am doing here is just calling completeProcTask(ProcTask procTask, String outcome, String comment, Map processVariables) of ProcessRuntimeManager.Site at. I am facing this for months now on all previous versions and I was ignoring as same works on retry. # Cause: : ERROR: deadlock detectedĪt .ExceptionFactory.wrapException(ExceptionFactory.java:30)Īt .(DefaultSqlSession.java:172)Īt .db.DbSqlSession.flushUpdates(DbSqlSession.java:878)Īt .db.DbSqlSession.flush(DbSqlSession.java:619)Īt .(CommandContext.java:212)Īt .(CommandContext.java:138)Īt .(CommandContextInterceptor.java:66)Īt $1.doInTransaction(SpringTransactionInterceptor.java:47)Īt .TransactionTemplate.execute(TransactionTemplate.java:133)Īt .execute(SpringTransactionInterceptor.java:45)Īt .(ExtSpringTransactionInterceptor.java:36)Īt .(LogInterceptor.java:31)Īt .(CommandExecutorImpl.java:40)Īt .(CommandExecutorImpl.java:35)Īt .tVariableLocal(RuntimeServiceImpl.java:246)Īt .pleteProcTask(ProcessRuntimeManagerBean.java:201)Īt .(TaskServiceBean.java:426)
# SQL: update ACT_RU_EXECUTION set REV_ = ?, BUSINESS_KEY_ = ?, PROC_DEF_ID_ = ?, ACT_ID_ = ?, IS_ACTIVE_ = ?, IS_CONCURRENT_ = ?, IS_SCOPE_ = ?, IS_EVENT_SCOPE_ = ?, PARENT_ID_ = ?, SUPER_EXEC_ = ?, SUSPENSION_STATE_ = ?, CACHED_ENT_STATE_ = ?, NAME_ = ? where ID_ = ? and REV_ = ? # The error occurred while setting parameters Where: while updating tuple (20,23) in relation "act_ru_execution" Process 10326 waits for ShareLock on transaction 53829925 blocked by process 10375.
Cause: : ERROR: deadlock detectedĭetail: Process 10375 waits for ShareLock on transaction 53829923 blocked by process 10326. The following exception might be specific to my implementation but I need help to debug it.
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