Hi,
I'm working with JBoss and MySQL 4.0.22 (and 4.0.18 on Testsystem). But under the load, I get sometimes Exceptions like this:
java.sql.SQLException: Deadlock found when trying to get lock; Try restarting transaction message from server: "Lock wait timeout exceeded; Try restarting transaction"
It looks like InnoDB problem. Is there a way to find out why this happens?
This is my mysql-ds.xml:
<?xml version="1.0" encoding="UTF-8"?>
<datasources>
<local-tx-datasource>
<jndi-name>OmaDS</jndi-name>
<connection-url>jdbc:mysql://localhost/ofa</connection-url>
<driver-class>com.mysql.jdbc.Driver</driver-class>
<user-name>user</user-name>
<password>xxx</password>
<connection-property name="autoReconnect">true</connection-property>
<!-- <transaction-isolation>TRANSACTION_READ_COMMITTED</transaction-isolation> -->
<!--pooling parameters-->
<min-pool-size>25</min-pool-size>
<max-pool-size>100</max-pool-size>
<blocking-timeout-millis>5000</blocking-timeout-millis>
<idle-timeout-minutes>15</idle-timeout-minutes>
<prepared-statement-cache-size>1000</prepared-statement-cache-size>
</local-tx-datasource>
</datasources>
Our beans are configured to make SELECT ... FOR UPDATE calls.
Best Regards,
Rafal