![]() Shared with intent exclusive (SIX): This lock occurs when a transaction that holds a shared lock also has an exclusive lock on some pages or rows.In SQL Server, there are three types of conversion locks: There are two types of SQL Server deadlocks to watch out for: conversion locks and cycle locks.Ĭonversion lock deadlocks occur when a thread tries to convert a lock from one exclusive type to another exclusive type but can’t because a different thread already holds a shared lock on the resource the first thread is trying to convert. Because only one process can use a resource at a time, performance slows until the deadlock is resolved. SQL Server deadlock is essentially a standoff between two processes that are competing for exclusive access to the same resource. Fortunately, there are ways to identify and correct SQL Server deadlock, and even prevent it from negatively affecting application performance. If this query returns a '1', you are already using it.There are many reasons why applications might be slow to respond, but if users are complaining about performance, you may be dealing with a SQL Server deadlock. DiagnosisĬheck whether you are using the recommended transaction isolation level of "Read Committed with Row Versioning" by running this SELECT query. SQL Server is escalating row locks (in this case deleting a draft from the CONTENT table) to table locks and stopping other transactions from accessing the table. This problem will be more prominent under high load environments when there are more concurrent page creates/edits. Rerun the transaction.Īt .SQLDiagnostic.addDiagnostic(SQLDiagnostic.java:367)Īt .TdsCore.tdsErrorToken(TdsCore.java:2816)Īt .TdsCore.nextToken(TdsCore.java:2254)Īt .TdsCore.getMoreResults(TdsCore.java:631)Īt .JtdsStatement.processResults(JtdsStatement.java:584)Īt .JtdsStatement.executeSQL(JtdsStatement.java:546)Īt .JtdsPreparedStatement.executeUpdate(JtdsPreparedStatement.java:505)Īt 2.(NewProxyPreparedStatement.java:105)Īt net.sf.(NonBatchingBatcher.java:22)Īt net.sf.(EntityPersister.java:581)Īt net.sf.(ScheduledDeletion.java:29)Īt net.sf.(SessionImpl.java:2449)Īt net.sf.(SessionImpl.java:2435)Īt net.sf.(SessionImpl.java:2397)Īt net.sf.(SessionImpl.java:2261)Īt net.sf.(JDBCTransaction.java:61) Rerun the transaction.Ĭaused by: : Transaction (Process ID 55) was deadlocked on lock resources with another process and has been chosen as the deadlock victim. ![]() nested exception is : Transaction (Process ID 55) was deadlocked on lock resources with another process and has been chosen as the deadlock victim. : Hibernate operation: could not delete: SQL Transaction (Process ID 55) was deadlocked on lock resources with another process and has been chosen as the deadlock victim. url: /confluence/pages/docreatepage.action | userName: tstcreator3 17:01:21,359 ERROR onThrowable Invoking rollback for transaction on action '/pages/docreatepage.action (CreatePageAction.doAdd())' due to throwable: : Hibernate operation: could not delete: SQL Transaction (Process ID 55) was deadlocked on lock resources with another process and has been chosen as the deadlock victim. 17:01:21,357 ERROR execute Could not synchronize database state with session 17:01:21,355 ERROR logExceptions Transaction (Process ID 55) was deadlocked on lock resources with another process and has been chosen as the deadlock victim. url: /confluence/pages/docreatepage.action | userName: tstcreator3 | action: docreatepage ![]()
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