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| <h1>Resource Manager Configuration</h1> |
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| <p>Apache ActiveMQ Artemis has its own Resource Manager for handling the lifespan of JTA transactions. |
| When a transaction is started the resource manager is notified and keeps a record of the transaction and its current state. |
| It is possible in some cases for a transaction to be started but then forgotten about. |
| Maybe the client died and never came back. |
| If this happens then the transaction will just sit there indefinitely.</p> |
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| <p>To cope with this Apache ActiveMQ Artemis can, if configured, scan for old transactions and rollback any it finds. |
| The default for this is 3000000 milliseconds (5 minutes), i.e. any transactions older than 5 minutes are removed. |
| This timeout can be changed by editing the <code>transaction-timeout</code> property in <code>broker.xml</code> (value must be in milliseconds). |
| The property <code>transaction-timeout-scan-period</code> configures how often, in milliseconds, to scan for old transactions.</p> |
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| <p>Please note that Apache ActiveMQ Artemis will not unilaterally rollback any XA transactions in a prepared state - this must be heuristically rolled back via the management API if you are sure they will never be resolved by the transaction manager.</p> |
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