ORA-01591 Error

Hello All,
While running a update statement against a table gives the error as
‘ORA-01591: lock held by in-doubt distributed transaction 36.18.209’.
What could be the cause ?
Thanks in Advance,
Dana

RTFM
Cause: Trying to access resource that is locked by a dead two-phase commit transaction that is in prepared state.
Action: DBA should query the pending_trans$ and related tables, and attempt to repair network connection(s) to coordinator and commit point. If timely repair is not possible, DBA should contact DBA at commit point if known or end user for correct outcome, or use heuristic default if given to issue a heuristic commit or abort command to finalize the local portion of the distributed transaction.

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ORA - 01591 error message

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I wonder if anyone could help us on this. We are using Oracle 7.3.4 and have created a public db link with another database that resides in a mainframe. We took an ORA - 01591 error message when we tried to update a table of the remote database from a stored procedure(using the db link). The strange thing is that noone was dealing with the specific table at the moment !!
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ORA-01591 errors

Hi All,
I am using 9iAS 1.0.2.1 on CompaqTru64. Using Portal I a created a simple FORM component based on the SCOTT.EMP table. When I try to run it, I am seeing the following error
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Madhav,
This error, suggests this is an operation on a remote table :
ORA-01591: lock held by in-doubt distributed transaction 6.49.3526
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ORA-01591 and ORA-00054 while creating index

Hi guys,
there is a situation that I didnt understand.
I have table and want to create an index on it but when I try to create an index I got one of
ORA-00054: resource busy and acquire with NOWAIT specified or timeout expired
or
ORA-01591: lock held by in-doubt distributed transaction 11.13.689049 errors.
as I know there is and .net application which has connection pooling and while this web services were active, I can not create index.
first thing that i did is querying V$LOCK table and i saw some TM locks from time to time and sometimes nothing. when there wasn't any locks on the table I try to create index, system wait for a while (1 minutes approximately) then I got "ORA-01591: lock held by in-doubt distributed ..." error again. (even "Application" wait event occured. in enterprise manager I saw a few red sql command which is waiting for my create index command)
after a quick search, I use PENDING_TRANS$ and PENDING_SESSIONS$ tables to force rollback to the transaction which is indicated on ORA-01591 error but just after I rollback that transaction, a new one come up every time.
today I use something else. First I locked table manually in EXCLUSIVE mode (and success it). then I try to create index again, command worked for a while and I got ORA-01591 error again.
any idea why is this happining and how can i create my index ?

sybrand_b,
when i run
Lock Table MyTable in exclusive mode;command, it succeeded. I can lock the table if you mean that or if you are saying even if that command runs very well, because of in doubt transaction, oracle will take the lock back, that could be. but as i said lock table command succeeded.
and there is an another situation here, there is no any other database ? I mean, how could an in doubt transaction happen. there are dblinks but they do not even query that table.
there is just something that i dont know. as i said in my first message, a .net application is running on an aplication server, as far as i know there connection pooling etc on that server. is this can cause that kind of in doubt transaction ?
PS: every time in ora-01591 error, I got the same transaction id and that transaction id is not in dba_2pc_pending or pending_session$ etc. that might help.
Edited by: Mustafa KALAYCI on 17.Şub.2012 13:48

ERROR:ORA-01591: lock held by in-doubt distributed transaction (URGENT)

hi
i m having this error when trying to access one table in oracle 10g database
ORA-01591: lock held by in-doubt distributed transaction 3.30.4119
i restarted the server but of no use. can anyone help?

ORA-01591: lock held by in-doubt distributed transaction string
Cause: Trying to access resource that is locked by a dead two-phase commit transaction that is in prepared state.
Action: DBA should query the pending_trans$ and related tables, and attempt to repair network connection(s) to coordinator and commit point. If timely repair is not possible, DBA should contact DBA at commit point if known or end user for correct outcome, or use heuristic default if given to issue a heuristic commit or abort command to finalize the local portion of the distributed transaction.
go through
drop locked table
plz. to through below i hope it will help u.
Re: ORA-1591 error
Message was edited by:
user52

ORA-01591: lock held by in-doubt distributed transaction string error

Hi Gurus,
I am getting the error
ORA-01591: lock held by in-doubt distributed transaction string error while running once procedure.
Procedure basically inserts 2 tables and update 1 table.
The order of execution is given below.
However I get the error as table _a locked.
Can you please help me how to handle this ?
Begin
Insert into table_a values (values1, value2); -- (our DB)
Insert into table_b@remote_DB values (value1, value2); --( REMOTE DB)
update table C ; -- (our DB)
commit; -- when I debugged I get exception with the sql error above in this commit.
End;

Tina wrote:
Hi Gurus,
I am getting the error
ORA-01591: lock held by in-doubt distributed transaction string error while running once procedure.
Procedure basically inserts 2 tables and update 1 table.
The order of execution is given below.
However I get the error as table _a locked.
Can you please help me how to handle this ?
Begin
Insert into table_a values (values1, value2); -- (our DB)
Insert into table_b@remote_DB values (value1, value2); --( REMOTE DB)
update table C ; -- (our DB)
commit; -- when I debugged I get exception with the sql error above in this commit.
End;
01591, 00000, "lock held by in-doubt distributed transaction %s"
// *Cause: Trying to access resource that is locked by a dead two-phase commit
//          transaction that is in prepared state.
// *Action: DBA should query the pending_trans$ and related tables, and attempt
//          to repair network connection(s) to coordinator and commit point.
//          If timely repair is not possible, DBA should contact DBA at commit
//          point if known or end user for correct outcome, or use heuristic
//          default if given to issue a heuristic commit or abort command to
//          finalize the local portion of the distributed transaction.

ORA-01591: lock held by in-doubt distributed transaction

I am using oracle wcf adapter to connect to oracle to insert.
I am getting the ORA-01591: lock held by in-doubt distributed transaction.
Any ideas as to what could be the resolution. I have followed the below mentioned steps. but that's not a permanent solution.
Please advice.
The resolution described below is not acceptable and never should have been used. Although it does avoid the error, it's not okay to turn off AmbientTransaction when performing inserts
and/or updates. A different solution needs to be found.<o:p></o:p>
http://msdn.microsoft.com/en-US/library/dd788352(v=BTS.10).aspx <o:p></o:p>
"Not performing operations in a transactional context is advisable only for operations that do not make changes to the database. For operations that update data in the database, we recommend
setting the binding property to true otherwise you might either experience message loss or duplicate messages depending on whether you are performing inbound or outbound operations."<o:p></o:p>
********************************************<o:p></o:p>
This can be resolved by adjusting the configuration settings on the Oracle adapter, accessible via the Send Port properties. The properties and the values that should be used are shown below:<o:p></o:p>
** Binding tab:
incrPoolSize: 1
maxPoolSize: 10
useAmbientTransaction: False<o:p></o:p>
** Messages tab:
Isolation Level: ReadCommitted<o:p></o:p>
Also, you'll need to get a DBA to rollback the hanging "in-doubt" transactions, which will be viewable via the sql below. Otherwise, if you try processing the same data again, you'll
still get the same error.<o:p></o:p>
SELECT LOCAL_TRAN_ID, GLOBAL_TRAN_ID, STATE, MIXED, HOST, COMMIT# FROM DBA_2PC_PENDING;<o:p></o:p>
The transactions can be rolled back with sql, using this syntax:<o:p></o:p>
ROLLBACK FORCE '<LOCAL_TRAN_ID>';
<o:p></o:p>
Thank you and have great day! Vivek Kulkarni MCAD.net

Hi Vivek,
This error is encountered by many DBA's and cause problem by locking the distributed transaction process, and not letting the query go through, because the Two - Phase Commit Mechanism got an error somewhere.
he DBA should query the pending_trans$ and related tables, and attempt to repair network connection(s) to coordinator and commit point.
Here are some codes to help you through the process:
This one brings in-doubt transactions:
select * from DBA_2PC_PENDING where state='prepared'
This one prepares the rollback script for the transactions:
select 'rollback force '''||local_tran_id||''';' from DBA_2PC_PENDING where state='prepared'
All this is well described in below link
ORA-01591: lock held by in-doubt distributed transaction
ORA-01591: lock held by in-doubt distributed transaction string tips
On BizTalk Side you need to make ambient transaction to false as Oracle does not go ahead with DTC Transaction with Biz Talk
Thanks
Abhishek

ORA-01591

Hi
i getting error pls can any one provide me solution.
SQL> delete from APPT_HEADER_TO_UPLOAD;
delete from APPT_HEADER_TO_UPLOAD
ERROR at line 1:
ORA-01591: lock held by in-doubt distributed transaction 2.36.157104

ORA-01591: lock held by in-doubt distributed transaction string
Cause: Trying to access resource that is locked by a dead two-phase commit transaction that is in prepared state.
Action: DBA should query the pending_trans$ and related tables, and attempt to repair network connection(s) to coordinator and commit point. If timely repair is not possible, DBA should contact DBA at commit point if known or end user for correct outcome, or use heuristic default if given to issue a heuristic commit or abort command to finalize the local portion of the distributed transaction.
is your database is in distributed environment?just check which sessions are accessing these tables and also check for locks.

ORA-01591 -- How to remove blocking distributed transaction?

Hi at all,
I've got a big problem! There is a transaction lock on a table and I can't access / update the table. The following error occures: ORA-01591: lock held by in-doubt distributed transaction 140.12.34934.
So, I decided to kill this transaction. But I can't find any transaction with that number. How can I remove this transaction. A restart of the database does not kill this trransaction.
Thanks for you help
Message was edited by:
user573407

ORA-01591 lock held by in-doubt distributed transaction string
Cause: An attempt was made to access resource that is locked by a dead two-phase commit transaction that is in prepared state.
Action: The database administrator should query the PENDING_TRANS$ and related tables, and attempt to repair network connection(s) to coordinator and commit point. If timely repair is not possible, the database administrator should contact the database administrator at the commit point if known or the end user for correct outcome, or use heuristic default if given to issue a heuristic COMMIT or ABORT command to finalize the local portion of the distributed transaction.

Ora-01591 Lock held in by In-doubt distributed transaction - help required

In my web application i am getting an error @ a particular page. I am using JTA user transaction to mark the transaction boundaries. On commit i am confronting the error "lock held in by In-Doubt transaction. I queried pending_trans$,dba_2pc_pending and force commit the transaction.Also i purged the transaction using Purge_Lost_db_entity. Still after doing all these i am facing the same problem with a new transaction no.
I did all the below steps:
I did follow the below steps:
SELECT * FROM PENDING_TRANS$
SELECT
LOCAL_TRAN_ID, GLOBAL_TRAN_ID, STATE, MIXED, HOST, COMMIT#
FROM
DBA_2PC_PENDING
WHERE
LOCAL _TRAN_ID = '??.';
SELECT LOCAL_TRAN_ID, IN_OUT, DATABASE, INTERFACE
FROM DBA_2PC_NEIGHBORS;
COMMIT FORCE 'local transactionID', 'SCN';
DBMS_TRANSACTION.PURGE_LOST_DB_ENTRY (local transactionID); OR
DBMS_TRANSACTION.PURGE_MIXED (local transactionID);
SELECT s.inst_id,
s.sid,
s.serial#,
p.spid,
s.username,
s.program
FROM gv$session s
JOIN gv$process p ON p.addr = s.paddr AND p.inst_id = s.inst_id
WHERE s.type != 'BACKGROUND'
and s.program='JDBC Thin Client'
ALTER SYSTEM KILL SESSION '102,10' IMMEDIATE;
Database shutdown and restart doesnt work..
Please anyone help..

tis is the result of the query v$version
Oracle Database 10g Enterprise Edition Release 10.2.0.3.0 - Prod
PL/SQL Release 10.2.0.3.0 - Production
"CORE 10.2.0.3.0 Production"
TNS for 32-bit Windows: Version 10.2.0.3.0 - Production
NLSRTL Version 10.2.0.3.0 - Production
I use websphere6.1 and oracle 10.2.0.3. using JTA UserTransaction to define boundaries. I am facing tis issue from last week only before it was working fine. I did the commit force as mentioned before to manually unlock transaction.From then i am getting this error. Could u pls help. I m having pressure from onsite, i dont know what is causing the error in one particular flow. I have included the error logs below.
[7/14/10 19:15:54:328 IST] 00000023 WSRdbXaResour E DSRA0304E: XAException occurred. XAException contents and details are:
The XA Error is : -3
The XA Error message is : A resource manager error has occured in the transaction branch.
The Oracle Error code is : 17410
The Oracle Error message is: Internal XA Error
The cause is : null.
[7/14/10 19:15:54:343 IST] 00000023 WSRdbXaResour E DSRA0302E: XAException occurred. Error code is: XAER_RMERR (-3). Exception is: <null>
[7/14/10 19:15:54:359 IST] 00000023 XATransaction E J2CA0027E: An exception occurred while invoking commit on an XA Resource Adapter from dataSource jdbc/ScorecardDataSource, within transaction ID {XidImpl: formatId(57415344), gtrid_length(36), bqual_length(54), data(00000129d13434870000000100000008f0685880e9e9a1514500185d37d88f31da70140400000129d13434870000000100000008f0685880e9e9a1514500185d37d88f31da701404000000010000000000000000000000000001)}: oracle.jdbc.xa.OracleXAException
[7/14/10 19:15:54:531 IST] 00000023 MCWrapper E J2CA0081E: Method cleanup failed while trying to execute method cleanup on ManagedConnection WSRdbManagedConnectionImpl@3e0a3e0a from resource jdbc/ScorecardDataSource. Caught exception: com.ibm.ws.exception.WsException: DSRA0080E: An exception was received by the Data Store Adapter. See original exception message: No more data to read from socket. with SQL State : null SQL Code : 17410
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:125)
[7/14/10 19:15:54:593 IST] 00000023 MCWrapper E J2CA0081E: Method destroy failed while trying to execute method destroy on ManagedConnection WSRdbManagedConnectionImpl@3e0a3e0a from resource No longer available. Caught exception: java.lang.NullPointerException
[7/14/10 19:16:08:093 IST] 00000023 SystemErr R Caused by: java.sql.SQLException: ORA-01591: lock held by in-doubt distributed transaction 9.34.890
Pls help

ORA-01591: lock held by in-doubt distributed transaction 14.4.44

Hi,
I am using WLI 8.1 SP2 on Windows 2000, Oracle 9.2. I am getting this error...
<Apr 23, 2004 10:43:43 AM EDT> <Error> <WLW> <000000> <error
java.io.IOException: [BEA][Oracle JDBC Driver][Oracle]ORA-01591: lock held by
in
-doubt distributed transaction 14.4.44
at weblogic.jdbc.base.BaseBlobOutputStream.write(Unknown Source)
at weblogic.jdbc.base.BaseBlobOutputStream.write(Unknown Source)
at com.bea.wlw.runtime.core.bean.BMPContainerBean$OracleTableAccess.doSt
oreByInsert(BMPContainerBean.java:904)
at com.bea.wlw.runtime.core.bean.BMPContainerBean.doInsert(BMPContainerB
ean.java:1785)
at com.bea.wlw.runtime.core.bean.BMPContainerBean.ejbStore(BMPContainerB
ean.java:1742)
at com.bea.wli.bpm.runtime.ProcessContainerBean.ejbStore(ProcessContaine
rBean.java:79)
at com.bea.wlwgen.PersistentContainer_nga2bb_Impl.ejbStore(PersistentCon
tainer_nga2bb_Impl.java:149)
at weblogic.ejb20.manager.ExclusiveEntityManager.beforeCompletion(Exclus
iveEntityManager.java:556)
at weblogic.ejb20.internal.TxManager$TxListener.beforeCompletion(TxManag
er.java:745)
at weblogic.transaction.internal.ServerSCInfo.callBeforeCompletions(Serv
erSCInfo.java:1010)
at weblogic.transaction.internal.ServerSCInfo.startPrePrepareAndChain(Se
rverSCInfo.java:115)
at weblogic.transaction.internal.ServerTransactionImpl.localPrePrepareAn
dChain(ServerTransactionImpl.java:1142)
at weblogic.transaction.internal.ServerTransactionImpl.globalPrePrepare(
ServerTransactionImpl.java:1868)
at weblogic.transaction.internal.ServerTransactionImpl.internalCommit(Se
rverTransactionImpl.java:250)
at weblogic.transaction.internal.ServerTransactionImpl.commit(ServerTran
sactionImpl.java:221)
at weblogic.ejb20.internal.MDListener.execute(MDListener.java:412)
at weblogic.ejb20.internal.MDListener.transactionalOnMessage(MDListener.
java:316)
at weblogic.ejb20.internal.MDListener.onMessage(MDListener.java:281)
at weblogic.jms.client.JMSSession.onMessage(JMSSession.java:2596)
at weblogic.jms.client.JMSSession.execute(JMSSession.java:2516)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:197)
I have tried dropping all wli tables & deleting tlog files (deleting everything
from cgServer directory). Still get this error.
Any suggestions??
TIA
-Amit

Getting this problem with WLI. I have just truncated tables and it's fine now.
Thanks,
Amit
"Sheetal Jain" <[email protected]> wrote:
>
Amit,
If these problem is happening with the WLI database then I would suggest
you should
talk to BEA support. If it is happening in the application you have built
just
look for any deadlock conditions happening in some scenarios inside different
inter-related transactions running at the same time, I mean transaction
1 is locking
something and in the meantime another one B locks something else which
is required
for the transaction A to move farward and now second one needs the resource
locked
by 1st.
Hope this helps
"Nagraj Rao" <[email protected]> wrote:
Hello Amit !,
Lock From In-Doubt Transaction is a 2-p TX issue, A query or DML statement
that
requires locks on a database is probably blocked due to some lock held
by a resource
of an "in-doubt distributed transaction".
A DB Admin can manually Commit or Rollback an "in-doubt distributedtransaction".
So I suggest you talk to the DBA
More at : http://www-rohan.sdsu.edu/doc/oracle/server803/A54653_01/ds_ch3.htm
BTW here's what Oracle says :
ORA-01591 lock held by in-doubt distributed transaction string
Cause: An attempt was made to access resource that is locked by a dead
two-phase
commit transaction that is in prepared state.
Action: The database administrator should query the PENDING_TRANS$ and
related
tables, and attempt to repair network connection(s) to coordinator and
commit
point. If timely repair is not possible, the database administratorshould
contact
the database administrator at the commit point if known or the end user
for correct
outcome, or use heuristic default if given to issue a heuristic COMMIT
or ABORT
command to finalize the local portion of the distributed transaction.
"Sheetal Jain" <[email protected]> wrote:
Amit,
It could be a bug. Open a ticket with BEA and see if they have a patch.
"Amit Bhutra" <[email protected]> wrote:
Hi,
I am using WLI 8.1 SP2 on Windows 2000, Oracle 9.2. I am getting
this
error...
<Apr 23, 2004 10:43:43 AM EDT> <Error> <WLW> <000000> <error
java.io.IOException: [BEA][Oracle JDBC Driver][Oracle]ORA-01591: lock
held by
in
-doubt distributed transaction 14.4.44
at weblogic.jdbc.base.BaseBlobOutputStream.write(Unknown Source)
at weblogic.jdbc.base.BaseBlobOutputStream.write(Unknown Source)
at com.bea.wlw.runtime.core.bean.BMPContainerBean$OracleTableAccess.doSt
oreByInsert(BMPContainerBean.java:904)
at com.bea.wlw.runtime.core.bean.BMPContainerBean.doInsert(BMPContainerB
ean.java:1785)
at com.bea.wlw.runtime.core.bean.BMPContainerBean.ejbStore(BMPContainerB
ean.java:1742)
at com.bea.wli.bpm.runtime.ProcessContainerBean.ejbStore(ProcessContaine
rBean.java:79)
at com.bea.wlwgen.PersistentContainer_nga2bb_Impl.ejbStore(PersistentCon
tainer_nga2bb_Impl.java:149)
at weblogic.ejb20.manager.ExclusiveEntityManager.beforeCompletion(Exclus
iveEntityManager.java:556)
at weblogic.ejb20.internal.TxManager$TxListener.beforeCompletion(TxManag
er.java:745)
at weblogic.transaction.internal.ServerSCInfo.callBeforeCompletions(Serv
erSCInfo.java:1010)
at weblogic.transaction.internal.ServerSCInfo.startPrePrepareAndChain(Se
rverSCInfo.java:115)
at weblogic.transaction.internal.ServerTransactionImpl.localPrePrepareAn
dChain(ServerTransactionImpl.java:1142)
at weblogic.transaction.internal.ServerTransactionImpl.globalPrePrepare(
ServerTransactionImpl.java:1868)
at weblogic.transaction.internal.ServerTransactionImpl.internalCommit(Se
rverTransactionImpl.java:250)
at weblogic.transaction.internal.ServerTransactionImpl.commit(ServerTran
sactionImpl.java:221)
at weblogic.ejb20.internal.MDListener.execute(MDListener.java:412)
at weblogic.ejb20.internal.MDListener.transactionalOnMessage(MDListener.
java:316)
at weblogic.ejb20.internal.MDListener.onMessage(MDListener.java:281)
at weblogic.jms.client.JMSSession.onMessage(JMSSession.java:2596)
at weblogic.jms.client.JMSSession.execute(JMSSession.java:2516)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:197)
I have tried dropping all wli tables & deleting tlog files (deleting
everything
from cgServer directory). Still get this error.
Any suggestions??
TIA
-Amit

ORA-01591: lock held by in-doubt distributed transaction 2.53.300807

SQL> select count(*) from TBCD_CCODMSG;
select count(*) from TBCD_CCODMSG
ERROR at line 1:
ORA-01591: lock held by in-doubt distributed transaction 2.53.300807
SQL> select * from TBCD_CCODMSG where rownum =10;
select * from TBCD_CCODMSG where rownum =10
ERROR at line 1:
ORA-01591: lock held by in-doubt distributed transaction 2.53.300807
SQL> alter session set events '1591 trace name errorstack level 10';
Session altered.
SQL> select * from TBCD_CCODMSG where rownum =10;
select * from TBCD_CCODMSG where rownum =10
ERROR at line 1:
ORA-01591: lock held by in-doubt distributed transaction 2.53.300807
SQL> select object_name, object_type from user_objects where object_name = 'TBCD_CCODMSG';
OBJECT_NAME
OBJECT_TYPE
TBCD_CCODMSG
TABLE
SQL> select * from DBA_2PC_PENDING;
no rows selected
SQL> select * from DBA_2PC_NEIGHBORS where local_tran_id = '2.53.300807';
LOCAL_TRAN_ID IN_
DATABASE
DBUSER_OWNER I DBID SESS#
BRANCH
2.53.300807 in
EFT.WORLD
CD1 N 15f1353d 1
0B000B00011902000128

보통은 오라클 Background 프로세스인 RECO 프로세스가
해당 문제를 자동으로 복구해줍니다.
하지만, 가끔씩 제대로 처리를 못해주는 경우는 DBA 가 아래 절차를 확인하여
수동으로 처리를 해줘야 하는 경우도 있습니다.
아래 내용을 참고하세요...
No. 12163
DISTRIBUTED TRANSACTION TROUBLESHOOTING (ORA-1591해결 방법)
==========================================================
다른 database를 이용하지 않는 local transaction이, 비정상 종료시 자동으로
rollback되는 것과는 달리, 분산 트랜잭션의 경우 2 phase commit수행 단계중에
fail이 발생하게 되면 관여된 일부 database에서는 rollback 혹은 commit이 되고,
일부는 distributed lock이 걸린 상태로 계속 지속될 수 있다.
이렇게 pending된 transaction에 대해서는 기본적으로 Oracle의 background
process인 RECO process가 자동으로 정리하여 주나, 경우에 따라 자동으로 정리가
되지 못하는 상황이 발생할 수 있다.
이렇게 정리가 되지 않아, distributed lock이 걸린 경우에는, 이후 관계된
table을 조회나 변경시 ora-1591 오류가 발생할 수 있으므로, distributed
transaction이 실패한 경우 db admin이 관여하여 pending된 transaction을
정리하여 줄 필요가 있다.
distributed transaction이 오류가 발생하거나, 혹은 이후에 ora-1591이 발생하는
경우, 조치 방법을 9단계의 STEP으로 정리하였다.
*** distributed transaction의 2 phase commit에 대한 개념 및 자세한 절차는
<korean bulletin:12185>를 참조한다.
[참고 1] 문서의 이해를 위해서 분산 환경에 포함된 node를 V817LOC와 V817REM으로
예를 들고, V817LOC node에서 transaction을 수행하였다고 가정한다.
[참고 2] 아래에 언급되는 dbms_transaction package는 기본적으로 catproc.sql
script에 의해 생성되나 만약 존재하지 않는다면,
cd $ORACLE_HOME/rdbms/admin directory의 dbmsutil.sql, prvtutil.plb
script를 sys user에서 수행하도록 한다.
(svrmgrl에서 connect internal에서 수행하는것이 일반적)
그리고 이 package는 항상 transaction의 맨 처음에 수행되어야 한다.
즉, 새로 session을 연결하여 수행하거나, 혹은 앞에 dml에 있었다면,
commit이나 rollback을 수행 후 이 package를 수행하여야 한다.
아래의 STEP중 STEP 1 ~ 3까지는 문제 해결을 위해 필수적인 단계는 아니므로 바로
문제를 시급히 해결해야 하는 경우 4번부터 확인하도록 한다.
STEP 1: alert.log file을 check한다.
bdump directory의 alert.log에는 분산 트랜잭션 fail시 관계된 오류 메시지등
log가 항상 남게 된다. 예를 들면 다음과 같은 형태인데, rollback/commit되었
는지, in-doubt 상태인지와 그 외에 transaction id등 정보를 확인할 수 있다.
Tue Dec 12 16:23:25 2000
ORA-02054: transaction 1.8.238 in-doubt
ORA-02063: preceding line from V817REM
Tue Dec 12 16:23:25 2000
DISTRIB TRAN V817LOC.WORLD.89f6eafb.1.8.238
is local tran 1.8.238 (hex=01.08.ee)
insert pending prepared tran, scn=194671 (hex=0.0002f86f)
STEP 2: network 환경을 확인한다.
listener가 떠 있는지, database link가 모두 정상적인지 확인해 본다.
STEP 3: RECO process가 떠 있는지 확인한다.
os상에서 RECO process가 떠 있는지 확인하려면 다음과 같이 한다.
os> ps -ef | grep reco
RECO process는 db가 startup되면서 자동으로 구동되는 background process로
distributed recovery를 disable시키면 사라지게 된다. distributed recovery를
enable/disable시키는 방법은 아래와 같다.
SQL>alter system enable distributed recovery;
SQL>alter system disable distributed recovery;
아래의 조치사항 중에서 STEP 9번을 제외하고는 기본적으로 RECO process가
자동으로 처리하는 작업과 동일하다. 그러나 여러가지 문제로 인해 RECO가
자동으로 정리하지 못한 경우 이 문서의 방법대로 manual하게 정리하여 주어야
한다.
STEP 4: DBA_2PC_PENDING을 조회해 본다.
sqlplus system/manager
SQL>select local_tran_id, global_tran_id, state, mixed, host, commit#
from dba_2pc_pending;
다음과 같은 결과가 return된다.
LOCAL_TRAN_ID|GLOBAL_TRAN_ID |STATE |MIX|HOST |COMMIT#
-------------|----------------------|--------|---|----------|--------
1.8.238 |V817LOC.WORLD.89f6eafb|prepared|no |SUP_SERVER|194671
|.1.8.238 | | |\eykim |
이 조회로 인해 여러개의 row가 나오는 경우 ora-1591이나 distributed fail에
관련된 오류시 나타나는 local transaction id값과 return된 LOCAL_TRAN_ID값을
비교하여 일치하는 row를 확인하면 된다. 이때 LOCAL_TRAN_ID 값과
GLOBAL_TRAN_ID의 뒷부분의 숫자가 동일하다면 이것은 이 node가 global
coordinator임을 의미한다.
STEP 5: DBA_2PC_NEIGHBORS view를 조회해 본다.
sqlplus system/manager
SQL>select local_id, in_out, database, dbuser_owner, interface
from dba_2pc_neighbors;
LOCAL_TRAN_ID|IN_OUT|DATABASE |DBUSER_OWNER |INT
-------------|------|-------------------------|---------------|---
1.8.238 |in | |SCOTT |N
1.8.238 |out |V817REM.WORLD |SCOTT |C
여기에 나타난 row들이 해당 분산 트랜잭션에 관여한 database 정보이다. 이때
DATABASE column 부분이 null로 나타나는 것은 현재 조회하고 있는 local
database를 의미하며, IN_OUT이 OUT으로 나타나는 경우 참조하는 node정보인데,
DATABASE 컬럼의 값이 해당 database를 가리키는 database link name이 된다.
이 database link name을 이용하여 다음과 같이 remote db의 DBA_2PC_PENDING을
다시 조사하여 관계된 node들의 상태를 확인할 수 있다.
SQL>select local_tran_id, global_tran_id, state, mixed, host, commit#
from dba_2pc_pending@v817rem;
각 node의 DBA_2PC_PENDING의 return된 row들이 같은 분산 트랜잭션에 포함된
정보인지는 GLOBAL_TRAN_ID 값을 이용하여 확인할 수 있다.
STEP 6: commit point site를 확인한다.
commit point site에 대해서는 <korean bulletin:12185>을 참조한다.
이 예의 경우 COMMIT_POINT_STRENGTH를 지정하지 않았기 때문에 default로
global coordinator가 아닌 V817REM이 commit point site가 된다. 일반적으로
commit point site는 global coordinator의 DBA_2PC_NEIGHBORS의 IN_OUT
field가 OUT으로 나타나고 INTERFACE 부분이 C로 나타나게 된다.
commit point site가 중요한 이유는 이 node의 local transaction부분은
prepared상태를 거치지 않아 in-doubt 상태가 되는 일이 없고, 그러므로
distributed lock에 의해 조회나 DML시 오류가 발생하는 없게 된다.
이러한 이유로 제일 중요한 data를 포함하는 중심이 되는 node를 commit point
site로 지정하는 것이 바람직하다.
STEP 7: DBA_2PC_PENDING의 MIXED column을 확인한다.
- MIXED값이 NO인 경우 : STEP 8 수행
- MIXED값이 YES인 경우: STEP 9 수행
DBA_2PC_PENDING에서 MIXED column을 YES나 NO의 값으로 지정하는 것은 RECO
process가 결정하여 변경하게 된다. MIXED가 YES가 되는 대표적인 경우는,
commit point site가 이미 commit을 수행한 상태에서 분산 트랜잭션이 fail된
경우, non-commit point site에서 prepared 상태의 transaction을 rollback
force시켜 분산 트랜잭션의 consistency가 깨진 상태이다.
(STATE column의 경우 commit point site는 COMMITTED로 non-commit point
site는 FORCED ROLLBACK으로 나타난다)
[참고] commit point site가 아직 commit을 수행하기 전에 분산 트랜잭션이
fail되어 commit point site가 rollback된 경우, non-commit point
site에서 prepared 상태의 transaction을 commit force 하면 이것도
논리적으로는 consistency가 지켜지지 않은 것은 동일하나 이때는
MIXED column이 no인 상태가 된다. 그 이유는 commit point site가
rollback되어 DBA_2PC_PENDING view에 entry가 남지 않기 때문에
RECO가 명시적으로 mixed 상태로 인식하는 것이 불가능하기 때문으로
파악된다.
STEP 8: DBA_2PC_PENDING의 STATE column의 값을 확인한다.
CASE 8-1: STATE field값이 COMMITTED인 경우
만약 STATE가 COMMITTED인 경우는 이 local database(V817LOC)에서는
transaction이 성공적으로 commit 되었음을 나타내므로, 이 node에서는 어떠한
작업도 수행할 필요가 없다. 이 entry는 RECO process에 의해 자동으로 지워질
것이며, 만약 RECO가 어떠한 이유로 이 row를 지우지 못했다면 다음과 같이
db admin이 직접 지워도 된다. 괄호 안의 값은 local_tran_id값이다.
sqlplus sys/manager (반드시 sys로 접속한다)
SQL>exec dbms_transaction.purge_lost_db_entry('1.8.238');
이렇게 V817LOC의 STATE부분이 COMMITTED인 경우는, 이미 commit point site인
V817REM은 commit된 후임을 나타낸다. 그러므로 V817REM은 STATE가 COMMITTED로
나타나거나 아니면 commit후 이미 정보가 지워져 DBA_2PC_PENDING에 정보가
나타나지 않을 수 있다. 그러므로 V817REM에 대해서는 필요한 경우 V817LOC의
앞의 조치 방법과 동일하게 DBA_2PC_PENDING의 내용만 정리하여 주면 된다.
만약 V817REM이 아닌 별도의 다른 node가 분산 트랜잭션에 관여했다고 가정하고
V817LOC가 COMMITTED인 상태에서 그 node의 STATE가 PREPARED로 나타난다면
그 node에 대해서는 아래의 CASE 8-2를 참조하여 해결하도록 한다.
CASE 8-2: STATE field값이 PREPARED인 경우
STATE값이 PREPARED인 경우는 이 node(V817LOC)에서 변경된 data가 속한 block
에 distributed lock이 걸린 상태이며, 이런 경우 변경된 data가 있는 block에
대한 모든 read/write가 ora-1591을 발생시키므로 trouble shooting에서 제일
중요한 부분이라 할 수 있다.
먼저 STEP 4와 STEP 5를 참조하여 관계된 모든 node들의 DBA_2PC_PENDING view
를 조회하여 본다. 이때 다른 node(V817REM)의 DBA_2PC_PENDING에 정보가 없다
면 V817REM이 commit point site이고 이미 data는 rollback되었음을 나타낸다.
이때는 V817LOC의 prepared 상태의 transaction을 다음과 rollback force 시켜
준다.
즉, V817LOC에서,
SQL>rollback force '1.8.238';
만약 V817REM node에 해당 정보가 있고 상태가 COMMITTED라면 V817LOC도
다음과 같이 commit을 해 주어야 한다.
SQL>commit force '1.8.238';
이때 local_tran_id 뒤에 SCN을 지정할 수 있는데 이것은 관여된 node 중 제일
큰 SCN을 지정하도록 한다. 이 SCN 값은 DBA_2PC_PENDING의 COMMIT# field에서
값을 확인할 수 있으며 이렇게 하는 이유는 이후 분산 database중 한 database
에서 incomplete recovery가 필요한 경우, 다른 database 들도 일관성을
맞추기 위해 incomplete recovery를 이용할 수 있게 하기 위한 것이다.
SQL>commit force '1.8.238', '194671'
CASE 8-3: STATE field값이 COLLECTING인 경우
STATE field가 collecting인 경우는 아직 distributed lock을 걸기 전단계에서
transaction이 비정상 종료됨을 나타내며, 이 단계에서는 distributed lock이
걸리기 전이어서 변경된 data는 이미 rollback된 상태이다. 이 경우는
DBA_2PC_PENDING에서 해당 entry를 지워 주면 된다.
sqlplus sys/manager (반드시 sys로 접속한다)
SQL>exec dbms_transaction.purge_lost_db_entry('1.8.238');
CASE 8-4: STATE field값이 FORCED ROLLBACK/FORCED COMMIT 인 경우
이미 RECO나 db admin이 rollback force나 commit force 명령을 시도하여
STATE가 FORCED ROLLBACK이나 FORCED COMMIT으로 변경된 경우는 추가적으로
수행할 작업은 없으며, RECO가 자동으로 이 entry를 지워 줄 것이다. 그러나
RECO가 작업하기를 기다리지 않고 다음과 같이 직접 삭제할 수 있다.
sqlplus sys/manager (반드시 sys로 접속한다)
SQL>exec dbms_transaction.purge_lost_db_entry('1.8.238');
STEP 9: 불일치 사항을 파악하고 DBA_2PC_PENDING을 정리한다.
어떠한 경우에 DBA_2PC_PENDING의 MIXED column이 YES가 되는지는 이미 STEP 7
에서 설명하였다. 이렇게 잘못된 조치에 의해 STEP 7에서 설명한 것과 같은
분산 데이타베이스간의 불일치가 발생한 경우는 간단한 operation을 통해
일치성을 맞추는 것은 불가능하다.
분산 트랜잭션의 consistency가 무엇보다 중요한 경우라면 관계된 node의
database를 모두 문제의 분산 트랜잭션이 수행되기 이전 상태로, incomplete
recovery를 수행하거나 할 수 있다. 분산 데이타베이스간의 일관성을 위한
incomplete recovery에 대해서는 여기에서는 다루지 않는다. 한가지 언급한
말한 것은 앞에서 설명한 분산 트랜잭션의 commit시 이용하는 commit SCN을
관계된 모든 node들의 최대 SCN으로 이용하는 것이 바로 이러한 recovery를
위한 것이다. 이렇게 일부 database에서 SCN값이 이전 SCN에서 1씩 증가하는
것이 아니라 큰 값으로 건너뛰어 다른 database와 같은 SCN을 유지하게
함으로써, 이후에 incomplete recovery시에 관계된 node들이 서로 동일한
SCN으로 recovery를 수행하면, 모두 분산 트랜잭션 적용 이전이 되거나 혹은
모두 이후가 되어 일관성을 유지할 수 있도록 해준다.
MIXED가 YES인 상태에서, inconsistency를 받아들이고 DBA_2PC_PENDING view를
정리하려면 다음과 같이 수행한다.
sqlplus sys/manager (반드시 sys user로 수행한다)
SQL>exec dbms_transaction.purge_mixed('1.8.238');

ORA-01591 Lock held by in doubt transaction

We have this error
ORA-01591 Lock held by in doubt transaction
this error appear randomly when
in the same transaction we use inser,delete or update sentence and a call to MS-MSMQ ( asynchronous transaction)
(Oracle 9i 9.2.0.5, HP Itanium Unix)
(Web application with .NET ODP Provider)
thanks for your help

Hi Vivek,
This error is encountered by many DBA's and cause problem by locking the distributed transaction process, and not letting the query go through, because the Two - Phase Commit Mechanism got an error somewhere.
he DBA should query the pending_trans$ and related tables, and attempt to repair network connection(s) to coordinator and commit point.
Here are some codes to help you through the process:
This one brings in-doubt transactions:
select * from DBA_2PC_PENDING where state='prepared'
This one prepares the rollback script for the transactions:
select 'rollback force '''||local_tran_id||''';' from DBA_2PC_PENDING where state='prepared'
All this is well described in below link
ORA-01591: lock held by in-doubt distributed transaction
ORA-01591: lock held by in-doubt distributed transaction string tips
On BizTalk Side you need to make ambient transaction to false as Oracle does not go ahead with DTC Transaction with Biz Talk
Thanks
Abhishek

Ora-00604 error and ora 01000 error while report generation.

hi all,
I am trying to generate the multiple reports of same template through a program.
While this job is running, i get the following error at the BIP console and the reports don't get generated.
[101711_044115578][][EXCEPTION] java.sql.SQLException: ORA-00604: error occurred
at recursive SQL level 1
ORA-01000: maximum open cursors exceeded
ORA-00604: error occurred at recursive SQL level 1
ORA-01000: maximum open cursors exceeded
ORA-01000: maximum open cursors exceeded
Kindly help.
Thanks.

Lots of resources with a simple search to see what this is about, for example:
http://www.orafaq.com/wiki/ORA-01000
ORA-01000:     maximum open cursors exceeded
Cause:     A host language program attempted to open too many cursors. The initialization parameter OPEN_CURSORS determines the maximum number of cursors per user.
Action:     Modify the program to use fewer cursors. If this error occurs often, shut down Oracle, increase the value of OPEN_CURSORS, and then restart Oracle.
open_cursors parameter
http://download.oracle.com/docs/cd/E11882_01/server.112/e25513/initparams160.htm#REFRN10137
Oracle support note:
OERR: ORA-1000 maximum open cursors exceeded (Doc ID 18591.1)

Ora-00604,ora-01422 error while dropping the table

Hi gurus,
I am using Oracle 10g R2 on windows 2000 platform,while dropping the table the following error occured.
ORA-00604 : error occurred at recursive sql level 1.
ORA-01422: exact fetch returns more than requested number of rows.
Need urgent help.
Thanks in advance

Is there an AFTER EVENT trigger defined on this database? Can you check that?
Secondly, was this database migrated from earlier version? I remember having seen this problem on 9i (it was 9.2.0.1 or 9.2.0.2; I can't recall exactly).

ORA-01591 Error

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