Error Ora-00060 Deadlock Detected While Waiting For Resource Ora-06512
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ora 00060 deadlock detected more info in file Fixing ORA-00060: deadlock detected while waiting for resource Oracle Database Tips by Burleson Consulting oracle deadlock resolution November 24, 2015 Question: I am getting this ORA-00060: deadlock detected while waiting for resource during a large update, against two separate tables. What I don't understand is why a ora-00060 deadlock detected while waiting for resource in datastage 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 deadlock is not an ORACLE error. It is a deadlockOra-00060 Deadlock Detected While Waiting For Resource In Informatica
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 clever enough to recognize it and throw the ORA-00060 rather than continuing the deadlock situation. Using the above dump,
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How To Check Deadlock In Oracle
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Oracle deadlocks tips Oracle Database Tips java.sql.sqlexception: ora-00060: deadlock detected while waiting for resource by Burleson Consulting What is an Oracle deadlock? Whenever you have competing DML running against the same data, you run the risk of a deadlock. This http://www.dba-oracle.com/t_ora_00060_deadlock_detected_while_waiting_for_resource.htm deadlock condition is an age-old issue known as the "perpetual embrace"! The doc 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. Deadlocks in Oracle result in http://www.dba-oracle.com/t_deadlock.htm this error: ORA-00060: deadlock detected while waiting for resource 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-turn, is waiting for task B to release a lock. To prevent a perpetual wait, Oracle aborts the transaction that caused the deadlock. See my notes here on resolving the deadlock detected error. Resolving Oracle deadlocks There are several remedies for resolving aborted tasks from deadlocks: Tune the application - Single-threading related updates and other application changes can often remove deadlocks. Re-scheduling batch update jobs to low-update times an also help. Add INITRANS - In certain conditions, increasing INITRANS for the target tables and indexes(adding slots to the ITL) can relieve deadlocks. Use smaller blocks with less data - Since the deadlock contention is at the block-level, consider moving these tables and indexes to a super-small blocksize (create a db2k_January 15, 2014 - 9:12 pm UTC Category: Database – Version: 11.2 Latest Followup You Asked *** 2011-09-20 14:29:09.745 DEADLOCK DETECTED ( ORA-00060 ) [Transaction Deadlock] The following https://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:3932525800346405986 deadlock is not an ORACLE error. It is a deadlock due to user https://community.oracle.com/thread/2183919 error in the design of an application or 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 waits TM-0000f4bc-00000000 42 575 SX SSX 48 5 SX SSX TM-0000f4bc-00000000 48 5 SX deadlock detected SSX 42 575 SX SSX session 575: DID 0001-002A-000002F0 session 5: DID 0001-0030-00000831 session 5: DID 0001-0030-00000831 session 575: DID 0001-002A-000002F0 Rows waited on: Session 575: no row Session 5: obj - rowid = 0000F38C - AAAPOMACrAABodTAAA (dictionary objn - 62348, file - 171, block - 427859, slot - 0) ----- Information for the OTHER waiting sessions ----- Session 5: sid: 00060 deadlock detected 5 ser: 13809 audsid: 4295982 user: 63/MI520SAASPERFT1_APP flags: 0x41 pid: 48 O/S info: user: oracle, term: UNKNOWN, ospid: 14422 image: oracle@aedbperf01 client details: O/S info: user: Administrator, term: AEBL009, ospid: 1680:2480 machine: DIUS\AEBL009 program: DrteFrameworkServer.exe application name: DrteFrameworkServer.exe, hash value=3560566261 current SQL: DELETE FROM event WHERE event_id = &0 ========================= Tom, This is my first ever question on this website. I have heard a lot about u. We are getting deadlock when running our benchmark on table EVENT. Table EVENT has 9 FK constraints and no indexes on FK constraints. What should I look to get more information regarding: a) What is causing deadlocks? It is being no indexes on FK or INITTRANS. Table has default settings: PCTFREE 10 INITRANS 1 MAXTRANS 255 b) We noticed that deadlocks happen mostly during start of load and not towards the end c) will it still cause a deadlock if there are no rows in those referenced tables for the event that is being deleted? d) I ran a script to identify the missing FK indexes: =================== Changing data in table PERIOD will lock tableEVENT Cr
CommunityOracle User Group CommunityTopliners CommunityOTN Speaker BureauJava CommunityError: You don't have JavaScript enabled. This tool uses JavaScript and much of it will not work correctly without it enabled. Please turn JavaScript back on and reload this page. Please enter a title. You can not post a blank message. Please type your message and try again. More discussions in General Database Discussions All PlacesDatabaseGeneral Database Discussions This discussion is archived 6 Replies Latest reply on Feb 25, 2011 8:26 PM by 687216 ORA-00060 (deadlock) because of check constraint? 687216 Feb 24, 2011 10:25 PM Hi everyone, we've received an ORA-00060 today, and I'm a bit confused by the message we got: ORA-00060: deadlock detected while waiting for resource ORA-06512: at "APP_USER.APP_SCHEDULER", line 160 ORA-06512: at "APP_USER.APP_SCHEDULER", line 419 ORA-02290: check constraint (APP_USER.PROCESS_TIME_CHECK) violated ORA-06512: at line 1 at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:439) at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:395) ...The SQL that failed just updates a very simple table - a list of processes PROCESS_LIST ( PROCESS_KEY INT PRIMARY KEY, PROCESS_NAME VARCHAR2(64), ... some more details ... PROCESS_START DATE, PROCESS_END DATE, CONSTRAINT PROCESS_TIME_CHECK CHECK (PROCESS_START <= PROCESS_END) )and the SQL is UPDATE process_list SET process_end = sysdate WHERE process_key = :idThe rest of the values is commited before the process actually starts (and performs this update at the end), and there are no other sessions accessing this row. There are other sessions updating rows for other processes (usually nearby this one). I've seen / fixed many types of deadlocks (caused by locked rows, bitmap indexes, ...) and I know it's usually a sign of poor application logic, but I'm not sure how a check constraint can lead to a deadlock ... First, I really doubt that check constraint can be violated, because the sequence of commands is something like this: 1) mark the process as started, set PROCESS_START=SYSDATE 2) commit 3) run the process (may be a PL/SQL procedure, external command or something) 4) mark