Error Message Ora-00060 Deadlock Detected While Waiting For Resource
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Ora-00060 Deadlock Detected While Waiting For Resource In Oracle
which is also attempting to acquire a resource held by the first session. To break the deadlock, Oracle releases the resource being held by one session and returns an error to allow the other session to proceed. In doing so, a trace file for the offending session is created in a directory ora 00060 solution based on the value for the user_dump_dest initialization parameter.While compressing a versioned geodatabase, the compress command may potentially encounter the Oracle error "ORA-00060: deadlock detected while waiting for resource". Cause If encountering the Oracle error during a compress, the deadlock being encountered is not the customary type of deadlock where two sessions are competing/blocking requests for the same row objects to update or delete, but blocking for the ITL slots in a segment's block header.For a very detailed description of the issue, review Oracle Metalink document 62354.1 "TX Transaction locks - Example wait scenarios" under the section, "Waits due to Insufficient 'ITL' slots in a Block".The blocking condition being encountered is likely to be on either the state_lineages table or on one of its two indexes: lineages_pk or lineage__id_idx2.The error typically only manifests itself when a compress is executed while a high number of users are concurrently editing the versioned geodatabase. Solution or Workaround
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Oracle Deadlock Resolution
Fixing ORA-00060: deadlock detected while waiting for resource Oracle
Ora-00060 Deadlock Detected While Waiting For Resource In Datastage
Database Tips by Burleson Consulting November 24, 2015 Question: I am getting this ORA-00060: deadlock detected while waiting for resource during a large update, against two separate tables. http://support.esri.com/technical-article/000010657 What I don't understand is why a deadlock can occur when having an update on two different tables, but I expect that the deadlock is ITL related ? java.sql.SQLException: ORA-00060: deadlock detected while waiting for resource at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:112) DEADLOCK DETECTED Current SQL statement for this session: UPDATE DBRT.DBRT_REALOP_DC_CYCLICS SET ... WHERE DBRT_TROD_PK = :43 The following http://www.dba-oracle.com/t_ora_00060_deadlock_detected_while_waiting_for_resource.htm deadlock is not an ORACLE error. It is a deadlock due to user error in the design of an applicationor from issuing incorrect ad-hoc SQL. The following information may aid in determining the deadlock: Deadlock graph: ---------Blocker(s)-------- ---------Waiter(s)--------- Resource Name process session holds waits process session holds waitsTX-0007000a-00019a9f 42 44 X 28 39 STX-001a0017-0000896d 28 39 X 42 44 Ssession 44: DID 0001-002A-00028438 session 39: DID 0001-001C-00004319 session 39: DID 0001-001C-00004319 session 44: DID 0001-002A-00028438Rows waited on:Session 39: obj - rowid = 0003559F - AAA1WfAB3AAAAAAAAA (dictionary objn - 218527, file - 119, block - 0, slot - 0) Session 44: obj - rowid = 0003DFE5 - AAA9/lADDAAAAAAAAA (dictionary objn - 253925, file - 195, block - 0, slot - 0) Answer: Whenever you have competing DML running against the same data, you run the risk of a deadlock. This deadlock condition is an age-old issue known as the perpetual embrace. This infinite loop is caused by either an application or bad ad hoc SQL, but Oracle is
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http://oracle-error.blogspot.com/2008/10/ora-00060-deadlock-detected-while_20.html Oracle parallel DML: Deadlock Detected:ORA-00060 Oracle Database Tips by Burleson Consulting Question: I'm having trouble running a parallel DML statement. Here is the code deadlock detected for Parallel DML, I'm running only one session which is current. I don't know how comes I got an error saying DEADLOCK DETECTED: SQL> alter session enable parallel dml; Session altered. SQL> SQL> alter session set db_file_multiblock_read_count=128; Session altered. SQL> set timin on SQL> SQL> SQL> UPDATE /*+ full(myobjects) parallel(myobjects, deadlock detected while 8)*/ myobjects 2SET object_name = upper(object_name); update /*+ full(myobjects) parallel(myobjects, 8)*/ * ERROR at line 1: ORA-12801: error signaled in parallel query server P015 ORA-00060: deadlock detected while waiting for resource Answer:It's one of two issues: Deadly embrace - Competing DML tasks cause perpetual deadlock ITL shortage - More ITL's needed for parallel DML ORA-00060 and Competing Updates Do you have competing updates running? This may be an age-old issue known as the perpetual embrace! The docs note that a retry may work: ORA-00060: deadlock detected while waiting for resource Cause: Transactions deadlocked one another while waiting for resources. Action: Look at the trace file to see the transactions and resources involved. Retry if necessary. If your ORA-00060 is caused by competing resources, the perpetual embrace happens when the aborted task (Task B) attempts to lock a row which is being held by another task (Task A), which, in-tudeadlock detected while waiting for resourceCause: Transactions deadlocked one another while waiting for resources.Action: Look at the trace file to see the transactions and resources involved. Retry if necessary.ORA-00060 error indicates that a dead lock occurred due to a resource contention with another session and Oracle rolled back your current statement to resolve the dead lock. The other session can proceed further as usual . Your current sessions rolled backed statements needs to be resubmitted for the execution after the required resources are available.These dead locks can occur in different scenarios: They can occur while doing parallel DML operations, while updating/deleting data from same tables from different sessions , while performing transactions on bitmap index tables and so on but the mentioned scenarios are the most common ones.At this point I think we would like to explore more about dead locks, so here are the in depth details on dead locks:What is dead lock, when it occurs and how to fix it?Dead lock occurs when two or more users waiting for the resources locked by each other. The users are stuck and they can not proceed as they may end up waiting indefinitely for the resources form each other. So when this condition occurs these users are stuck (deadly embraced) and cannot continue processing.Oracle automatically detects deadlocks and resolves them by rolling back one of the transactions/statements involved in the deadlock, thus releasing one set of resources/data locked by that transaction. The session that is rolled back will observe Oracle error: ORA-00060: deadlock detected while waiting for resource. Oracle will also produce detailed information in a trace file under database's UDUMP directory.Most commonly these deadlocks are caused by the applications that involve multi table updates in the same transaction and multiple applications/transactions are acting on the same table at the same time. These multi-table deadlocks can be avoided by locking tables in same order in all applications/transactions, thus preventing a deadlock condition.In the following example I am demonstrating a dead lock scenario . In the first session ie. session1 lock table: CUSTOMER then CONTACT; and in session2: CONATCT then CUSTOMER.Here is an example of how to simulate a deadlock error:Session 1 lock table CUSTOMER:SQL> update customer set concatenate_bills_boo = 'T' where customer_ref = '10000000000000000486';1 row updated.Session 2 lock table CONTACT:SQL> update contact set language_id = 8 where customer_ref = '10000000000000000486';1 row updated.Session 1 now update CONTACT. The session will hang waiting for a lo