A situation caused by two or more processes being unable to proceed (and thus release their locks) because they are blocked by locks on resources held by the other process.

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179 views

Weird deadlock graph

I got a deadlock graph that I cannot completely understand. This is the deadlock graph xml (table names obfuscated, obviously): <?xml version="1.0" encoding="utf-16"?> <deadlock-list> ...
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1answer
152 views

Is UDPLOCK using Row-locks?

I have a UPDATE statement that is using a UPDLOCK inside a DTCTransaction to avoid deadlocks. Now I was wondering. is it locking on a Row-level or on a Table-level?
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221 views

SQL Server 2008R2 - Stored Procedure with 2 updates causing deadlocks

I have a web api web service that calls an authentication stored procedure. This stored procedure calls a different stored procedure that does 1 update: UPDATE ...
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1answer
196 views

ORA-04020 on Oracle SE1 (11.2.0.1)

We've been experiencing some deadlock issues on our Oracle SE1 (11.2.0.1) database server (Red Hat 5/64bit) Seeing ORA-04020 errors in the logs. Is going to 11.2.0.2 the only way to resolve the ...
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2answers
179 views

Getting a Deadlock,

I have this code : public void saveItems(List<Pair<Item, MapleInventoryType>> items, int id) throws SQLException { PreparedStatement ps = null; PreparedStatement pse = null; ...
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1answer
385 views

Deadlock from mysqldump --single-transaction, is it possible?

Is it possible to get a deadlock if you ran mysqldump with the argument --single-transaction ? or any other complication ? If it is used to backup a live site with many other querys running at the ...
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1answer
485 views

Oracle transactions deadlock

How to rollback all active transactions on Oracle DB? I execute query and see 4 transcations in ACTIVE status. SELECT * FROM V$TRANSACTION
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1answer
402 views

sql server 2005 deadlock error 3930

I am trying to simulate a solution for a deadlock issue happened on our production server. Run this to create a table to be used in 2 and 3. IF (SELECT OBJECT_ID('dbo.MyProduct') ) IS NOT NULL ...
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1answer
57 views

How to create via sql and detect via ERRORLOG SQL Server 2008 Deadlocks

I am designing a monitoring program using HP Sitescope SIS. The goal is detect deadlocks. In doing so, I created a deadlock on an existing but nearly unused SQL Server 2008. I used the following ...
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1answer
85 views

Pessimistic locking worst case

We are using Java EE. And are making an apllication where in the worst case, aloot of message queue messages willl come form the same User. Therefore we are looking on Pessimistic, SELECT FOR UPDATE ...
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3answers
3k views

How to avoid deadlock while updating 2 rows in MySQL

This is a interview problem: There is a perl program that updates the database, and it could run in different processes. One process may execute a transaction like: update row A -> update ...
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1answer
698 views

MySQL InnoDB locking on combined UPDATE-JOIN statements

on querying statements which contain an UPDATE combined with JOIN, we are getting the following errors: Statements writing to a table with an auto-increment column after selecting from another table ...
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1answer
262 views

What would be possible reasons for a DeadLock to occur in Mysql Database?

If some one has a Table structure some thing like this, CREATE TABLE IF NOT EXISTS `domain_source` (`nid` int(11) NOT NULL DEFAULT '0', `domain_id` int(11) NOT NULL DEFAULT '0', PRIMARY KEY (`nid`) ) ...
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1answer
42 views

Please help in understaning DeadLock Graph

<deadlock-list> <deadlock victim="process46d288"> <process-list> <process id="process46d288" taskpriority="0" logused="9968" waitresource="PAGE: 14:1:4468703" ...
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1answer
99 views

Deadlock caused by INSERT trigger - thread looking for lock it already has?

Using MySQL 5.6.17. I have a table with an INSERT trigger that reads values from that table and 4 other tables, combines the results and writes that to a sixth table. Ever since I added this trigger, ...
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0answers
24 views

MySQL what is the order of the table lock for this query?

An example query looks like this: INSERT INTO Adventure (sword, fighter, quest) SELECT Swords.id, Fighters.id, Quests.id FROM swords Swords, fighters Fighters, quests Quests WHERE Swords._id = ...
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0answers
83 views

How to fix deadlock caused by “X” locks on same resource?

I have the following <resource-list>: <resource-list> <keylock hobtid="72058301601677312" dbid="7" objectname="myDatabase.dbo.TableOne" indexname="PK_TableOne" id="lock2c336fb380" ...
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0answers
136 views

notification email when deadlock is encountered in alert log,oracle

how to send a notification email when deadlock is encountered in alert log on any node like the deadlocks encounterd below (an alert any time a deadlock is detected in alert log.) Node 1: Mon Sep ...
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0answers
67 views

InnoDB says I'm in Deadlock when it should not be

I'll do my best to explain the situation. I'm at a complete loss. Preliminaries I'm running a Java Web Application in Tomcat 7.0 using a JDBC Connector to communicate with my MySQL Database. The ...
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0answers
39 views

Is it possible for a SELECT-only stored procedure to deadlock on itself?

Environment is Microsoft SQL Server 2012. Is it possible for a stored procedure consisting exclusively of SELECT statements to deadlock on itself? That is the report I am getting from a vendor for ...
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0answers
57 views

Innodb Deadlock During Insert

What could be the reason behind 2 inserts causing a deadlock? Here is what I get from log file: *** (1) TRANSACTION: TRANSACTION 6CA06B9, ACTIVE 6 sec inserting mysql tables in use 1, locked 1 LOCK ...
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0answers
169 views

Avoid transaction rollback when Deadlock is encountered (mysql)

I'm currently trying to handle concurrent inserts correctly using MySQL, I'm basically doing the following: CREATE TABLE foo (id INT NOT NULL PRIMARY KEY) ENGINE=INNODB; CREATE TABLE bar (id INT NOT ...
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1answer
305 views

MySQL: Transaction and Deadlock

I have table "tbl_data", where have a lot of rows (3 - 5 million). I have JAVA (*.jar) module from which I INSERT/UPDATE data into this table. If I start *.jar file (for example, "run.jar") and after ...
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0answers
377 views

Single DELETE statement deadlocking in Sybase ASE

I've got a fairly straightforward process running on ASE 15.7, that creates rows in two tables and later deletes them. The tables are both configured to use datapages for the locking scheme, and the ...
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0answers
91 views

Lock timeouts on a table with two keys, where only one connection writes for a given value of the first key at a time

I have a table user_rollup_message_list that is keyed by (user_id, message_reference). It is a write-heavy table, and gets enough writes that I get many lock timeouts, with a timeout of 50 seconds, ...
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1answer
1k views

Why are these two INSERTs deadlocking? Is it the trigger? What does this deadlock trace 1222 log tell me?

We are seeing intermittent deadlocks in production when receiving multiple simultaneous API requests. Each request basically culminates in an INSERT statement into the same table, which is where we ...
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1answer
1k views

SQL Server 2008, database completely locked

Our database becomes completely locked, and it seems that many tables not related to each other are locked at once. When this happens, it becomes locked for approximately 2 minutes, and when this ...
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1answer
468 views

Deadlock : Behaviour of NOLOCK

We are running into deadlocks when we run concurrent instances of following query : BEGIN TRAN IF NOT EXISTS (SELECT TOP 1 * FROM Table1 WITH (NOLOCK) WHERE Col1 = Val1 AND Col2 = Val2) BEGIN ...
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1answer
249 views

how to avoid deadlock while updating 2 rows in mysql [duplicate]

This is a interview problem. There is a perl program that updates the database, and it could run in different processes. One process may execute a transaction like: update row A -> update row B -> ...
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1answer
505 views

dead lock when updating [closed]

Update Operation.TrTable Set RecordId = RecordTABLE.newRecordId From Operation.TrTable tr Inner Join ( SELECT r.Id AS newRecordId, r.KeyM AS MappingKey From ...
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0answers
50 views

Query Deadlock on Select Query [closed]

I have 2 queries deadlocking on each other. The first query is Select Top 1 NULL From [Table1] with (HOLDLOCK, TABLOCKX) Second Query is an insert query that only reads from [Table2] to put data ...
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0answers
189 views

Postgres database locked up [closed]

I was running a process to update a bunch of rows in postgres database and it locked up. Now I can't select anything out of it. None of my processes are "idle in transaction" when I execute ps ...