What is Distributed_lock_timeout?

DISTRIBUTED_LOCK_TIMEOUT specifies the amount of time (in seconds) for distributed transactions to wait for locked resources.

What is Oracle doubt transaction?

The two-phase commit mechanism ensures that all nodes either commit or perform a rollback together. What happens if any of the three phases fails because of a system or network error? The transaction becomes in-doubt.

What is the difference between lock and deadlock in Oracle?

A deadlock occurs when two or more threads of control are blocked, each waiting on a resource held by the other thread. Note that when one locker in a thread of control is blocked waiting on a lock held by another locker in that same thread of the control, the thread is said to be self-deadlocked.

How can stop deadlock in Oracle?

LOCK IN SHARE MODE ), try using a lower isolation level such as READ COMMITTED . When modifying multiple tables within a transaction, or different sets of rows in the same table, do those operations in a consistent order each time. Then transactions form well-defined queues and do not deadlock.

What is XA transaction timeout?

Set XA Transaction Timeout. Enables WebLogic Server to set a transaction branch timeout based on the value for XaTransactionTimeout. When enabled, the WebLogic Server Transaction Manager calls XAResource.

What are indoubt transactions?

An indoubt transaction is a global transaction that was left in an indoubt state. This occurs when either the Transaction Manager (TM) or at least one Resource Manager (RM) becomes unavailable after successfully completing the first phase (that is, the PREPARE phase) of the two-phase commit protocol.

What is table lock in Oracle?

What are table locks in Oracle? Table locks perform concurrency control for simultaneous DDL operations so that a table is not dropped in the middle of a DML operation, for example. When Oracle issues a DDL or DML statement on a table, a table lock is then acquired.

What is the time out in ora-02049?

ORA-02049: time-out: distributed transaction waiting for lock Cause : The time to wait on a lock in a distributed transaction has been exceeded. This time is specified in the initialization parameter DISTRIBUTED_LOCK_TIMEOUT.

What causes remote batch job to get ora-02049?

And we are getting the ORA-02049: timeout: distributed transaction waiting for lock. So can you please help us to understand, is simultanious transactions from different nodes is causing the issue or any other cause for this error.

How to get ora-02049, distributed transaction waiting for lock?

Getting ORA-02049: time-out: distributed transaction waiting for lock. The query is generated by the ATG application and uses the update statement for record update. I have no idea what “ATG” is or does.

How to fix oracle Ora 02063 database errors?

Increase the Value of INITRANS and Rebuild the Indexes Helped. Table accessed via DB_LINK has INITRANS = 1, resulting in too much ITL Waits ~200 and Row Lock Waits ~100000. Now the INITRANS Value is increased to 20, resulting in No Row Lock wait for Distributed/Concurrent Transactions.