I am looking for a good strategy of dealing with database deadlocks from within a Java 6 application; several parallel threads could, potentially, write into the same table at the same time. The database (Ingres RDMBS) will randomly kill one of the sessions if it detects a deadlock. What would be an acceptable technique to deal with the...
If following situation a bug in mysql?. Mysql Version: mysql.x86_64 5.0.77-4.el5_4.1 Kernel: Linux box2 2.6.18-128.el5 #1 SMP Wed Jan 21 10:41:14 EST 2009 x86_64 x86_64 x86_64 GNU/Linux LATEST DETECTED DEADLOCK 100125 4:24:41 * (1) TRANSACTION: TRANSACTION 0 210510625, ACTIVE 155 sec, process no 28125, OS thread id 1243162944 st...
When capturing a deadlock event in the logs, I am getting a message that indicates: Log Viewer could not read information for this log entry. Cause: Data is Null. This method or property cannot be called on Null values.. When I look in the ERRORLOG file, I see something like this: 2010-01-18 04:47:15.69 spid4s Wait-for graph...
I am facing deadlock issue in the System SP sys.sp_grantdbaccess. Has anyone faced the same issue. If yes, please let me know to overcome this issue. ...
One of my co-workers has a stored procedure that does the following Begin tran 1) Dynamically generate a select statement. 2) Insert into table x 3) Execute the select statement End tran If this stored procedure is ran by two septate threads simultaneously, he gets the following error: System.Data.SqlClient.SqlException: Transaction ...
i have a stored procedure that performs a join of TableB to TableA: SELECT <--- Nested <--- TableA Loop <-- | ---TableB At the same time, in a transaction, rows are inserted into TableA, and then into TableB. This situation is occasionally causing deadlocks, as the stored pr...
Hi all: I have a MySQL table with about 5,000,000 rows that are being constantly updated in small ways by parallel Perl processes connecting via DBI. The table has about 10 columns and several indexes. One fairly common operation gives rise to the following error sometimes: DBD::mysql::st execute failed: Deadlock found when trying to...
What is deadlock in sql server and when it arises? What are the issues with deadlock and how to resolve it? ...
I have an Oracle DB package that is routinely causing what I believe is an ITL (Interested Transaction List) deadlock. The relevant portion of a trace file is below. Deadlock graph: ---------Blocker(s)-------- ---------Waiter(s)--------- Resource Name process session holds waits process session holds w...
We're very frustratingly getting deadlocks in MySQL. It isn't because of exceeding a lock timeout as the deadlocks happen instantly when they do happen. Here's the SQL code that is executing on 2 separate threads (with 2 separate connections from the connection pool) that produces a deadlock: UPDATE Sequences SET Counter = LAST_INSERT...
I am receiving a lot of deadlocks in my big web application. http://stackoverflow.com/questions/2941233/how-to-automatically-re-run-deadlocked-transaction-asp-net-mvc-sql-server Here I wanted to re-run deadlocked transactions, but I was told to get rid of the deadlocks - it's much better, than trying to catch the deadlocks. So I spen...
Here's the scenario: I've got a table called MarketDataCurrent (MDC) that has live updating stock prices. I've got one process called 'LiveFeed' which reads prices streaming from the wire, queues up inserts, and uses a 'bulk upload to temp table then insert/update to MDC table.' (BulkUpsert) I've got another process which then rea...
Hello, I am currently building a PHP e-commerce website for my client. Its been going smoothly but I've hit a roadblock and was wondering if any MySQL/PHP experts can help me. Basically, the e-commerce site sells a product only once (meaning they only have one quantity in stock for each item), which means that once a customer checks out...
So, I'm being confused about foreign key constraint handling in Postgresql. (version 8.4.4, for what it's worth). We've got a couple of tables, mildly anonymized below: device: (id, blah, blah, blah, blah, blah x 50)… primary key on id whooooole bunch of other junk device_foo: (id, device_id, left, right) Foreign key (...
On SQL Server 2005, I'm getting a deadlock when updating two different keys in the same table. note from below that these two waitresources have the same beginning part, but different ending parts. waitresource="KEY: 6:72057594090487808 (d900ed5a6cc6)" and waitresource="KEY: 6:72057594090487808 (d900fb5261bb)" These two keys ar...
I am researching deadlocks that are happening in our application. I turned trace on for 1204, 1205 and 3605. I got the deadlock trace alright. But I am unable to figure out the resource it is deadlocking on. I have read many forums and they all say that the trace should contain something called a KEY/RID which would point to the resource...
Say I want to implement a database with a lock system, and I use lock avoidance and try to avoid a potential deadlock before acquiring it. My question is: When the session/transaction has already successfully acquired some resource A, and now it tries to acquire lock on resource B, when a deadlock is detected. Hence, the session fails...
i need execute un update statement over an sql server table, this table is used by another process at the same time. because that sometimes deadlocks ocurs. wich Isolation Level do you recomend to avoid or minimize this deadlocks? ...
Is it possible in relational databases for these two statements to deadlock? I'm trying to simplify my question and example -- please just assume that these selects, which I think would normally only require sharable read-locking, now require exclusive read locks: Concurrent Connection 1: SELECT {...} FROM A JOIN B ON {...} Concurren...
Hi, I have one customer experiencing 5+ deadlocks per day. 170+ other customers don't get any deadlocks at all. I've implemented deadlock tracing and can see the select/update/insert deadlocks occurring. I implemented a with (rowlock) hint and this sorted the initial deadlock out. However, the thing still deadlocks further on down t...